Some standard content:
ICS75.020
Registration No.: 6824-2000
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T5289—2000
Evaluating method for hydraulic fracturing effect of oil well2000-03-10 issued
2000-10-01 implemented
SY/T5289-—2000
2 Production evaluation method
3 Economic evaluation method
4 Technical evaluation method
Appendix A (Standard Appendix)
Appendix B (Standard Appendix)
Appendix C (Suggestive Appendix)
Format of fracturing effect evaluation table
Format of fracturing investment statistics table
Composition of fracturing investment
SY/T5289-2000
This standard is a revision of the original standard SY/T5289-91 "Evaluation method for oil well fracturing effect". Compared with the original standard, the main revisions are as follows:
- The reservoir types are reclassified;
The calculation method of the cumulative increase in oil production is clarified;
The concept of output-input ratio is introduced;
When calculating the increase in production value, the crude oil commodity rate is considered;
The crude oil price is calculated according to the international crude oil sales price during the effective period of the increase in production. This standard will replace SY/T5289-91 from the date of entry into force. Appendix A and Appendix B of this standard are both standard appendices. Appendix C of this standard is a prompt appendix.
This standard is proposed by China National Petroleum Corporation. This standard is under the jurisdiction of the Oil and Gas Production Professional Standardization Committee. The drafting unit of this standard: Drilling and Production Technology Research Institute of Changqing Petroleum Exploration Bureau. The main drafters of this standard are Liu Hailang, Song Zhenyun and Chen Baochun. This standard was first issued in July 1991, and this is the first revision. N
1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Evaluation method for hydraulic fracturing effect of oil well
Evaluating method for hydraulic fracturing effect of oil wellSY/T5289—2000
Replaces SY/T5289—91
This standard specifies the production evaluation method, economic evaluation method and technical evaluation method for hydraulic fracturing effect of oil well. This standard is applicable to the evaluation of the effect of primary fracturing construction of oil production wells. It can also be used as a reference for the evaluation of the effect of secondary fracturing construction of oil exploration wells. The three evaluation methods can be used separately. 2 Production evaluation method
2.1 Numerical calculation and value determination
2.1.1 Daily oil production
2.1.1.1 Daily oil production before fracturing is calculated according to formula (1). quf
Where: qu
Daily oil production before fracturing, t/d;
The sum of the oil production in the last 30 days before fracturing, t. 2.1.1.2The initial daily oil production after fracturing is calculated according to formula (2). qf
Where: qf
Daily oil production in the initial period after fracturing, t/d;
-The sum of the oil production in the first 30 days after fracturing, t. (1)
(2)
2.1.1.3When calculating the daily oil production before or after fracturing, it should be converted to the same production pressure difference. If the oil production is abnormal, the oil production of the well can be selected in the 30 days of continuous normal production for calculation. 2.1.2Daily increased oil production
Daily increased oil production is calculated according to formula (3).
Ag = qf-quf
Wherein: Aq—daily increased oil production, t/d;
qr—initial daily oil production after fracturing, t/d;
daily oil production before fracturing, t/d.
2.1.3 Effective period of increased production
2.1.3.1 For wells without initial production, the effective period of increased production by fracturing shall end when the daily oil production reaches the economic oil production. ·(3)
2.1.3.2 The effective period of increased production is the number of days that the daily oil production after fracturing is continuously greater than the daily oil production calculated according to the natural decline rate of the oil well production before fracturing during the same period.
Approved by the State Administration of Petroleum and Chemical Industry on March 10, 2000, implemented on October 1, 2000
SY/T5289--2000
2.1.3.3 When the second fracturing is carried out within the effective period of the first fracturing, the effective period of the first fracturing shall end at the time of the second fracturing.
Cumulative increased oil production
Cumulative increased oil production is calculated according to formula (4).
ANp = NpF - NuPF
Where: ANp—Cumulative increased oil production, t;
Cumulative oil production within the effective period, t;
Cumulative oil production calculated by the natural decline rate of production according to the previous oil during the effective period, t. 2.2 Evaluation method
·(4)
The evaluation of oil well fracturing production adopts three indicators, namely daily oil production increase, effective period of production increase and cumulative oil production increase, to comprehensively evaluate the fracturing effect. The single evaluation is expressed in points, and the sum of the three scores is the comprehensive score. The evaluation level of oil well fracturing effect is divided according to the size of the comprehensive score.
The various indicators and scores for oil well fracturing production evaluation can be formulated by the evaluation department of the application unit according to Table 1. 2.2.1
Table 1 Various indicators and scores for evaluation of fracturing effect production Items
Daily increased oil production Aq
Effective period of increased production t
Air permeability K
10~3μm2
K≤<10
10≤K<50
50K<100
K≥100
≤<10
50≤K<100
K≥100
Value range
≥250
≥180
(20÷4) Ag
(2014)Ag
(2020)g
(30÷400)
(30-320)
(30÷250 )
(30-180)
(30-120)
Cumulative increased oil production △Np
SY/T5289—2000
Table 1 (End)
Air permeability K
10-3μm2
1≤<10
10≤K<50
50≤K≤100
K≥100
Numerical range
≥400
≥800
Note: The numerical ranges are the value ranges of daily increased oil production, effective period of increased production, and cumulative increased oil production. 2.2.2
The production evaluation level of oil and fracturing effect can be formulated by the evaluation department of the application unit according to Table 2. Table 2 Fracturing effect and production evaluation grade determination table, etc.
Note: “X” represents comprehensive score
Comprehensive score
60≤×<80
40≤X<60
(50→300)ANp
(50400)Np
(50500)ANp
(50600)ANp
(50800）ANp
Evaluation effect
Good effect
Good effect
2.2.3 When conducting oil well fracturing effect and production evaluation, the basic data table of fracturing construction for oil layers and the production evaluation table should be filled in. The format is shown in Appendix A (Appendix to the standard).
3 Economic evaluation method
3.1 Numerical calculation value provisions
3.1.1 Fracturing increase output value
Fracturing increase output value is calculated according to formula (5).
V=P. ·ANp·β
Where: V-
-Fracturing increase output value, yuan;
Force. Crude oil price, yuan/, calculated according to the international crude oil sales price during the effective period of increase in production; ANp-
-Cumulative increase in oil production, t, calculated according to formula (4); (5)
β--Crude oil commodity rate, %, is the ratio of crude oil commodity volume to total crude oil production, which should be determined according to the indicators issued by the planning department of the oil field.
3.1.2 Fracturing economic benefits
Fracturing economic benefits are calculated according to formula (6).
Wherein: E is the economic benefit of fracturing, yuan;
C is the investment in fracturing, yuan;
SY/T5289—2000
E=VC-Ca:ANp
Ca-unit oil production cost, yuan t.
3.1.3 Output-input ratio
The output-input ratio is calculated according to formula (7).
In = C + Ca . AN,
Wherein: Input-output ratio.
3.1.4 Fracturing investment payback period
The time required for the investment to be fully recovered after the fracturing is put into production. 3.2 Evaluation method
·(7)
The economic effect of fracturing is comprehensively evaluated by using three indicators: output-input ratio, fracturing investment payback period and economic benefit. The single evaluation is expressed in points, and the sum of the three scores is the comprehensive score. The evaluation level of the economic effect of fracturing is divided according to the size of the comprehensive score. 3.2.1 The indicators and scores of the economic evaluation of fracturing effect can be formulated by the evaluation department of the application unit according to Table 3. Table 3 Indicators and scores for economic evaluation of fracturing effect Item
Output-input ratio
Fracturing investment payback period t, d
Economic benefit E, yuan
tr<100
100≤500
tr≥500
≥1000000
<1000000
The economic evaluation level of fracturing effect can be formulated by the evaluation department of the application unit according to Table 4. Table 4
Fracturing effect economic evaluation grade determination table
Note: "X" represents comprehensive score
Comprehensive score
60X<80
40≤X<60
(3010)^
（501000000）E
Evaluation effect
Good effect
Good effect
SY/T5289—2000
3.2.3 The economic evaluation of fracturing effect should be determined by actual statistical data. In order to analyze and evaluate the needs, when actual statistical data is lacking, it can be calculated and determined by mathematical statistics methods based on the trend of production changes. 3.3 Composition and data statistics of primary fracturing investment 3.3.1 When calculating the cost of fracturing investment, the statistical table of fracturing investment should be filled in. Its format is shown in Appendix B (Standard Appendix). 3.3.2 The composition of primary fracturing investment is shown in Appendix C (Suggested Appendix). 3.3.3 When conducting an economic evaluation of the effect of oil well fracturing, the basic data table of oil layer and fracturing construction and the economic evaluation table should be filled in. The format is shown in Appendix A (Appendix to the standard).
4 Technical evaluation method
4.1 Numerical calculation and value provisions
4.1.1 Skin coefficient difference is calculated according to formula (8). AS = Sr-Su
Where: △S skin coefficient difference;
Su——skin coefficient before fracturing;
S;—skin coefficient after fracturing.
Note: The skin coefficient is the resistance equivalent increased or decreased by pollution or damage in the area near the bottom, which is provided by the well test data. 4.1.2 Oil production index ratio is calculated according to formula (9). PI
Where: PI—oil production index ratio;
Juf——oil production index before fracturing;
J—oil production index after fracturing.
Note: The oil production index is the daily oil production per unit production pressure difference, which is provided by test data. ·(8)
4.1.3 When using the technical evaluation method, well testing must be carried out before and after fracturing, and other data required for interpreting the well testing data must be measured at the same time. The measured well testing data must meet the quality requirements for interpreting the well testing data. 4.1.4 The time for well testing before fracturing must be within 90 days before the well is shut down for fracturing, and the time for well testing after fracturing must be within 30 days and within 90 days of normal production of the fracturing well. 4.1.5 When evaluating the effect of a fracturing operation in the same oil well, the well testing method used before and after fracturing should be consistent, the analysis method and calculation formula used for interpreting the test data should be consistent, and the interpretation means used should also be consistent. 4.1.6 When calculating the evaluation parameters, all the required data that should be determined by well testing data cannot be borrowed or determined by other methods.
4.2 Evaluation method
The skin coefficient difference and oil recovery index ratio are used to comprehensively evaluate the fracturing effect. The single evaluation is expressed in points, and the sum of the two scores is the comprehensive score. The evaluation level of the fracturing effect is divided according to the size of the comprehensive score. 4.2.1 The technical evaluation indicators and scores of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 5. 4.2.2 The technical evaluation level of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 6. 4.2.3 When conducting a technical evaluation of the fracturing effect of an oil well, the basic data table of the oil layer and fracturing construction and the technical evaluation table should be filled in. The format is shown in Appendix A (Appendix to the standard).
Skin coefficient difference AS
Oil recovery index ratio PI
SY/T5289—2000
Table of various indicators and scores for fracturing effect technology evaluation
0.50~10.00
1.10~3.00
Note: I△SI represents the absolute value of skin coefficient difference Table 6 Determination of grade of fracturing effect technology evaluation Grade
Note: “X” represents comprehensive Total score
Comprehensive score
60≤X<80
40≤X<60
（4010)
（603）PI
Evaluation effect
Good effect
Good effect
A1 production evaluation table (see Table A1)
Oil field:
Well number:
Reservoir data
Daily oil production increase, t
Effective period of increased production, d
Cumulative increased oil production, t
Evaluation unit
Economic evaluation table (see Table A2)
Oil field:
Well number:
SY/T5289—2000
Appendix A
(Standard Appendix)
Format of fracturing effect evaluation table
Table A1 Production evaluation table
Construction unit:
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3m2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
Economic evaluation table
Construction unit:
Oil layer data
Output-input ratio
Payback period, d
Economic benefit, yuan
Evaluation unit
Technical evaluation table (see Table A3)
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible signature
Signature date
m*/min
m°/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Year/month/day
Total liquid Volume
Year Month Day
Total Liquid Volume
Oil Field:
Well Number:
Skin Coefficient Difference
Oil Production Index Ratio
Evaluation Unit
Reservoir Data
SY/T5289-—2000
Table A3 Technical Evaluation Table
Construction Unit:
Porosity
Comprehensive Score
Evaluator| |tt||Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
m2/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Total liquid volume1 The various indicators and scores of economic evaluation of fracturing effect can be formulated by the evaluation department of the application unit according to Table 3. Table 3 Various indicators and scores of economic evaluation of fracturing effect Item
Output input ratio
Fracturing investment payback period t, d
Economic benefit E, yuan
tr<100
100≤500
tr≥500
≥1000000
<1000000
The economic evaluation level of fracturing effect can be formulated by the evaluation department of the application unit according to Table 4. Table 4
Fracturing effect economic evaluation grade determination table
Note: "X" represents comprehensive score
Comprehensive score
60X<80
40≤X<60
(3010)^
（501000000）E
Evaluation effect
Good effect
Good effect
SY/T5289—2000
3.2.3 The economic evaluation of fracturing effect should be determined by actual statistical data. In order to analyze and evaluate the needs, when actual statistical data is lacking, it can be calculated and determined by mathematical statistics methods based on the trend of production changes. 3.3 Composition and data statistics of primary fracturing investment 3.3.1 When calculating the cost of fracturing investment, the statistical table of fracturing investment should be filled in. Its format is shown in Appendix B (Standard Appendix). 3.3.2 The composition of primary fracturing investment is shown in Appendix C (Suggested Appendix). 3.3.3 When conducting an economic evaluation of the effect of oil well fracturing, the basic data table of oil layer and fracturing construction and the economic evaluation table should be filled in. The format is shown in Appendix A (Appendix to the standard).
4 Technical evaluation method
4.1 Numerical calculation and value provisions
4.1.1 Skin coefficient difference is calculated according to formula (8). AS = Sr-Su
Where: △S skin coefficient difference;
Su——skin coefficient before fracturing;
S;—skin coefficient after fracturing.
Note: The skin coefficient is the resistance equivalent increased or decreased by pollution or damage in the area near the bottom, which is provided by the well test data. 4.1.2 Oil production index ratio is calculated according to formula (9). PI
Where: PI—oil production index ratio;
Juf——oil production index before fracturing;
J—oil production index after fracturing.
Note: The oil production index is the daily oil production per unit production pressure difference, which is provided by test data. ·(8)
4.1.3 When using the technical evaluation method, well testing must be carried out before and after fracturing, and other data required for interpreting the well testing data must be measured at the same time. The measured well testing data must meet the quality requirements for interpreting the well testing data. 4.1.4 The time for well testing before fracturing must be within 90 days before the well is shut down for fracturing, and the time for well testing after fracturing must be within 30 days and within 90 days of normal production of the fracturing well. 4.1.5 When evaluating the effect of a fracturing operation in the same oil well, the well testing method used before and after fracturing should be consistent, the analysis method and calculation formula used for interpreting the test data should be consistent, and the interpretation means used should also be consistent. 4.1.6 When calculating the evaluation parameters, all the required data that should be determined by well testing data cannot be borrowed or determined by other methods.
4.2 Evaluation method
The skin coefficient difference and oil recovery index ratio are used to comprehensively evaluate the fracturing effect. The single evaluation is expressed in points, and the sum of the two scores is the comprehensive score. The evaluation level of the fracturing effect is divided according to the size of the comprehensive score. 4.2.1 The technical evaluation indicators and scores of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 5. 4.2.2 The technical evaluation level of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 6. 4.2.3 When conducting a technical evaluation of the fracturing effect of an oil well, the basic data table of the oil layer and fracturing construction and the technical evaluation table should be filled in. The format is shown in Appendix A (Appendix to the standard).
Skin coefficient difference AS
Oil recovery index ratio PI
SY/T5289—2000
Table of various indicators and scores for fracturing effect technology evaluation
0.50~10.00
1.10~3.00
Note: I△SI represents the absolute value of skin coefficient difference Table 6 Determination of grade of fracturing effect technology evaluation Grade
Note: “X” represents comprehensive Total score
Comprehensive score
60≤X<80
40≤X<60
（4010)
（603）PI
Evaluation effect
Good effect
Good effect
A1 production evaluation table (see Table A1)
Oil field:
Well number:
Reservoir data
Daily oil production increase, t
Effective period of increased production, d
Cumulative increased oil production, t
Evaluation unit
Economic evaluation table (see Table A2)
Oil field:
Well number:
SY/T5289—2000
Appendix A
(Standard Appendix)
Format of fracturing effect evaluation table
Table A1 Production evaluation table
Construction unit:
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3m2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
Economic evaluation table
Construction unit:
Oil layer data
Output-input ratio
Payback period, d
Economic benefit, yuan
Evaluation unit
Technical evaluation table (see Table A3)
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible signature
Signature date
m*/min
m°/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Construction date:
Construction parameters
Evaluation effect
Supervisory departmentwwW.bzxz.Net
Signature date
Year/month/day
Total liquid Volume
Year Month Day
Total Liquid Volume
Oil Field:
Well Number:
Skin Coefficient Difference
Oil Production Index Ratio
Evaluation Unit
Reservoir Data
SY/T5289-—2000
Table A3 Technical Evaluation Table
Construction Unit:
Porosity
Comprehensive Score
Evaluator| |tt||Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
m2/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Total liquid volume1 The various indicators and scores of economic evaluation of fracturing effect can be formulated by the evaluation department of the application unit according to Table 3. Table 3 Various indicators and scores of economic evaluation of fracturing effect Item
Output input ratio
Fracturing investment payback period t, d
Economic benefit E, yuan
tr<100
100≤500
tr≥500
≥1000000
<1000000
The economic evaluation level of fracturing effect can be formulated by the evaluation department of the application unit according to Table 4. Table 4
Fracturing effect economic evaluation grade determination table
Note: "X" represents comprehensive score
Comprehensive score
60X<80
40≤X<60
(3010)^
（501000000）E
Evaluation effect
Good effect
Good effect
SY/T5289—2000
3.2.3 The economic evaluation of fracturing effect should be determined by actual statistical data. In order to analyze and evaluate the needs, when actual statistical data is lacking, it can be calculated and determined by mathematical statistics methods based on the trend of production changes. 3.3 Composition and data statistics of primary fracturing investment 3.3.1 When calculating the cost of fracturing investment, the statistical table of fracturing investment should be filled in. Its format is shown in Appendix B (Standard Appendix). 3.3.2 The composition of primary fracturing investment is shown in Appendix C (Suggested Appendix). 3.3.3 When conducting an economic evaluation of the effect of oil well fracturing, the basic data table of oil layer and fracturing construction and the economic evaluation table should be filled in. The format is shown in Appendix A (Appendix to the standard).
4 Technical evaluation method
4.1 Numerical calculation and value provisions
4.1.1 Skin coefficient difference is calculated according to formula (8). AS = Sr-Su
Where: △S skin coefficient difference;
Su——skin coefficient before fracturing;
S;—skin coefficient after fracturing.
Note: The skin coefficient is the resistance equivalent increased or decreased by pollution or damage in the area near the bottom, which is provided by the well test data. 4.1.2 Oil production index ratio is calculated according to formula (9). PI
Where: PI—oil production index ratio;
Juf——oil production index before fracturing;
J—oil production index after fracturing.
Note: The oil production index is the daily oil production per unit production pressure difference, which is provided by test data. ·(8)
4.1.3 When using the technical evaluation method, well testing must be carried out before and after fracturing, and other data required for interpreting the well testing data must be measured at the same time. The measured well testing data must meet the quality requirements for interpreting the well testing data. 4.1.4 The time for well testing before fracturing must be within 90 days before the well is shut down for fracturing, and the time for well testing after fracturing must be within 30 days and within 90 days of normal production of the fracturing well. 4.1.5 When evaluating the effect of a fracturing operation in the same oil well, the well testing method used before and after fracturing should be consistent, the analysis method and calculation formula used for interpreting the test data should be consistent, and the interpretation means used should also be consistent. 4.1.6 When calculating the evaluation parameters, all the required data that should be determined by well testing data cannot be borrowed or determined by other methods.
4.2 Evaluation method
The skin coefficient difference and oil recovery index ratio are used to comprehensively evaluate the fracturing effect. The single evaluation is expressed in points, and the sum of the two scores is the comprehensive score. The evaluation level of the fracturing effect is divided according to the size of the comprehensive score. 4.2.1 The technical evaluation indicators and scores of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 5. 4.2.2 The technical evaluation level of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 6. 4.2.3 When conducting a technical evaluation of the fracturing effect of an oil well, the basic data table of the oil layer and fracturing construction and the technical evaluation table should be filled in. The format is shown in Appendix A (Appendix to the standard).
Skin coefficient difference AS
Oil recovery index ratio PI
SY/T5289—2000
Table of various indicators and scores for fracturing effect technology evaluation
0.50~10.00
1.10~3.00
Note: I△SI represents the absolute value of skin coefficient difference Table 6 Determination of grade of fracturing effect technology evaluation Grade
Note: “X” represents comprehensive Total score
Comprehensive score
60≤X<80
40≤X<60
（4010)
（603）PI
Evaluation effect
Good effect
Good effect
A1 production evaluation table (see Table A1)
Oil field:
Well number:
Reservoir data
Daily oil production increase, t
Effective period of increased production, d
Cumulative increased oil production, t
Evaluation unit
Economic evaluation table (see Table A2)
Oil field:
Well number:
SY/T5289—2000
Appendix A
(Standard Appendix)
Format of fracturing effect evaluation table
Table A1 Production evaluation table
Construction unit:
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3m2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
Economic evaluation table
Construction unit:
Oil layer data
Output-input ratio
Payback period, d
Economic benefit, yuan
Evaluation unit
Technical evaluation table (see Table A3)
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible signature
Signature date
m*/min
m°/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Year/month/day
Total liquid Volume
Year Month Day
Total Liquid Volume
Oil Field:
Well Number:
Skin Coefficient Difference
Oil Production Index Ratio
Evaluation Unit
Reservoir Data
SY/T5289-—2000
Table A3 Technical Evaluation Table
Construction Unit:
Porosity
Comprehensive Score
Evaluator| |tt||Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
m2/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Total liquid volume1 When calculating the investment cost of fracturing, the fracturing investment statistics table should be filled in. Its format is shown in Appendix B (Appendix of the standard). 3.3.2 The composition of a fracturing investment is shown in Appendix C (Appendix of the suggestion). 3.3.3 When conducting an economic evaluation of the fracturing effect of an oil well, the basic data table of the oil layer and fracturing construction and the economic evaluation table should be filled in. Its format is shown in Appendix A (Appendix of the standard).
4 Technical evaluation method
4.1 Numerical calculation and value provisions
4.1.1 The skin coefficient difference is calculated according to formula (8). AS = Sr-Su
Where: △S skin coefficient difference;
Su——skin coefficient before fracturing;
S;——skin coefficient after fracturing.
Note: The skin coefficient is the resistance equivalent increased or decreased by pollution or damage in the area near the bottom, which is provided by the well test data. 4.1.2 The oil production index ratio is calculated according to formula (9). PI
Where: PI—oil production index ratio;
Juf—oil production index before fracturing;
J—oil production index after fracturing.
Note: The oil production index is the daily oil production per unit production pressure difference, provided by test data. ·(8)
4.1.3 When adopting the technical evaluation method, well testing must be carried out before and after fracturing, and other data required for interpreting the well testing data must be measured at the same time. The measured well testing data must meet the quality requirements for interpreting the well testing data. 4.1.4 The time for well testing before fracturing must be within 90 days before the well is shut in for fracturing, and the time for well testing after fracturing must be within 90 days after the normal production of the well put into production by fracturing. 4.1.5 When evaluating the effect of a fracturing operation in the same oil well, the well test method used before and after fracturing should be consistent, the analysis method and calculation formula used for the test data interpretation should be consistent, and the interpretation means used should also be consistent. 4.1.6 When calculating the evaluation parameters, all the required data that should be determined by well test data cannot be borrowed or determined by other methods.
4.2 Evaluation method
The two indicators of skin coefficient difference and oil recovery index ratio are used to comprehensively evaluate the fracturing effect. The single evaluation is expressed by a score, and the sum of the two scores is the comprehensive score. The evaluation level of the fracturing effect is divided according to the size of the comprehensive score. 4.2.1 The technical evaluation indicators and scores of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 5. 4.2.2 The technical evaluation level of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 6. 4.2.3 When conducting a technical evaluation of the effect of oil well fracturing, the basic data table of oil layer and fracturing construction and the technical evaluation table should be filled in. The format is shown in Appendix A (Standard Appendix).
Skin coefficient difference AS
Oil recovery index ratio PI
SY/T5289—2000
Table of various indicators and scores for technical evaluation of fracturing effect
0.50~10.00
1.10~3.00
Note: I△SI represents the absolute value of skin coefficient difference Table 6 Determination of grade of fracturing effect technical evaluation Grade
Note: "X" represents comprehensive Total score
Comprehensive score
60≤X<80
40≤X<60
（4010)
（603）PI
Evaluation effect
Good effect
Good effect
A1 production evaluation table (see Table A1)
Oil field:
Well number:
Reservoir data
Daily oil production increase, t
Effective period of increased production, d
Cumulative increased oil production, t
Evaluation unit
Economic evaluation table (see Table A2)
Oil field:
Well number:
SY/T5289—2000
Appendix A
(Standard Appendix)
Format of fracturing effect evaluation table
Table A1 Production evaluation table
Construction unit:
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3m2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
Economic evaluation table
Construction unit:
Oil layer data
Output-input ratio
Payback period, d
Economic benefit, yuan
Evaluation unit
Technical evaluation table (see Table A3)
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible signature
Signature date
m*/min
m°/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Year/month/day
Total liquid Volume
Year Month Day
Total Liquid Volume
Oil Field:
Well Number:
Skin Coefficient Difference
Oil Production Index Ratio
Evaluation Unit
Reservoir Data
SY/T5289-—2000
Table A3 Technical Evaluation Table
Construction Unit:
Porosity
Comprehensive Score
Evaluator| |tt||Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
m2/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Total liquid volume1 When calculating the investment cost of fracturing, the fracturing investment statistics table should be filled in. Its format is shown in Appendix B (Appendix of the standard). 3.3.2 The composition of a fracturing investment is shown in Appendix C (Appendix of the suggestion). 3.3.3 When conducting an economic evaluation of the fracturing effect of an oil well, the basic data table of the oil layer and fracturing construction and the economic evaluation table should be filled in. Its format is shown in Appendix A (Appendix of the standard).
4 Technical evaluation method
4.1 Numerical calculation and value provisions
4.1.1 The skin coefficient difference is calculated according to formula (8). AS = Sr-Su
Where: △S skin coefficient difference;
Su——skin coefficient before fracturing;
S;——skin coefficient after fracturing.
Note: The skin coefficient is the resistance equivalent increased or decreased by pollution or damage in the area near the bottom, which is provided by the well test data. 4.1.2 The oil production index ratio is calculated according to formula (9). PI
Where: PI—oil production index ratio;
Juf—oil production index before fracturing;
J—oil production index after fracturing.
Note: The oil production index is the daily oil production per unit production pressure difference, provided by test data. ·(8)
4.1.3 When adopting the technical evaluation method, well testing must be carried out before and after fracturing, and other data required for interpreting the well testing data must be measured at the same time. The measured well testing data must meet the quality requirements for interpreting the well testing data. 4.1.4 The time for well testing before fracturing must be within 90 days before the well is shut in for fracturing, and the time for well testing after fracturing must be within 90 days after the normal production of the well put into production by fracturing. 4.1.5 When evaluating the effect of a fracturing operation in the same oil well, the well test method used before and after fracturing should be consistent, the analysis method and calculation formula used for the test data interpretation should be consistent, and the interpretation means used should also be consistent. 4.1.6 When calculating the evaluation parameters, all the required data that should be determined by well test data cannot be borrowed or determined by other methods.
4.2 Evaluation method
The two indicators of skin coefficient difference and oil recovery index ratio are used to comprehensively evaluate the fracturing effect. The single evaluation is expressed by a score, and the sum of the two scores is the comprehensive score. The evaluation level of the fracturing effect is divided according to the size of the comprehensive score. 4.2.1 The technical evaluation indicators and scores of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 5. 4.2.2 The technical evaluation level of the fracturing effect can be formulated by the evaluation department of the application unit according to Table 6. 4.2.3 When conducting a technical evaluation of the effect of oil well fracturing, the basic data table of oil layer and fracturing construction and the technical evaluation table should be filled in. The format is shown in Appendix A (Standard Appendix).
Skin coefficient difference AS
Oil recovery index ratio PI
SY/T5289—2000
Table of various indicators and scores for technical evaluation of fracturing effect
0.50~10.00
1.10~3.00
Note: I△SI represents the absolute value of skin coefficient difference Table 6 Determination of grade of fracturing effect technical evaluation Grade
Note: "X" represents comprehensive Total score
Comprehensive score
60≤X<80
40≤X<60
（4010)
（603）PI
Evaluation effect
Good effect
Good effect
A1 production evaluation table (see Table A1)
Oil field:
Well number:
Reservoir data
Daily oil production increase, t
Effective period of increased production, d
Cumulative increased oil production, t
Evaluation unit
Economic evaluation table (see Table A2)
Oil field:
Well number:
SY/T5289—2000
Appendix A
(Standard Appendix)
Format of fracturing effect evaluation table
Table A1 Production evaluation table
Construction unit:
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3m2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
Economic evaluation table
Construction unit:
Oil layer data
Output-input ratio
Payback period, d
Economic benefit, yuan
Evaluation unit
Technical evaluation table (see Table A3)
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible signature
Signature date
m*/min
m°/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Year/month/day
Total liquid Volume
Year Month Day
Total Liquid Volume
Oil Field:
Well Number:
Skin Coefficient Difference
Oil Production Index Ratio
Evaluation Unit
Reservoir Data
SY/T5289-—2000
Table A3 Technical Evaluation Table
Construction Unit:
Porosity
Comprehensive Score
Evaluator| |tt||Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
m2/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Total liquid volume3 When conducting a technical evaluation of the effect of oil well fracturing, the basic data table of oil layer and fracturing construction and the technical evaluation table should be filled in. The format is shown in Appendix A (Standard Appendix).
Skin coefficient difference AS
Oil recovery index ratio PI
SY/T5289—2000
Table of various indicators and scores for technical evaluation of fracturing effect
0.50~10.00
1.10~3.00
Note: I△SI represents the absolute value of skin coefficient difference Table 6 Determination of grade of fracturing effect technical evaluation Grade
Note: "X" represents comprehensive Total score
Comprehensive score
60≤X<80
40≤X<60
（4010)
（603）PI
Evaluation effect
Good effect
Good effect
A1 production evaluation table (see Table A1)
Oil field:
Well number:
Reservoir data
Daily oil production increase, t
Effective period of increased production, d
Cumulative increased oil production, t
Evaluation unit
Economic evaluation table (see Table A2)
Oil field:
Well number:
SY/T5289—2000
Appendix A
(Standard Appendix)
Format of fracturing effect evaluation table
Table A1 Production evaluation table
Construction unit:
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3m2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
Economic evaluation table
Construction unit:
Oil layer data
Output-input ratio
Payback period, d
Economic benefit, yuan
Evaluation unit
Technical evaluation table (see Table A3)
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible signature
Signature date
m*/min
m°/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Year/month/day
Total liquid Volume
Year Month Day
Total Liquid Volume
Oil Field:
Well Number:
Skin Coefficient Difference
Oil Production Index Ratio
Evaluation Unit
Reservoir Data
SY/T5289-—2000
Table A3 Technical Evaluation Table
Construction Unit:
Porosity
Comprehensive Score
Evaluator| |tt||Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
m2/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Total liquid volume3 When conducting a technical evaluation of the effect of oil well fracturing, the basic data table of oil layer and fracturing construction and the technical evaluation table should be filled in. The format is shown in Appendix A (Standard Appendix).
Skin coefficient difference AS
Oil recovery index ratio PI
SY/T5289—2000
Table of various indicators and scores for technical evaluation of fracturing effect
0.50~10.00
1.10~3.00
Note: I△SI represents the absolute value of skin coefficient difference Table 6 Determination of grade of fracturing effect technical evaluation Grade
Note: "X" represents comprehensive Total score
Comprehensive score
60≤X<80
40≤X<60
（4010)
（603）PI
Evaluation effect
Good effect
Good effect
A1 production evaluation table (see Table A1)
Oil field:
Well number:
Reservoir data
Daily oil production increase, t
Effective period of increased production, d
Cumulative increased oil production, t
Evaluation unit
Economic evaluation table (see Table A2)
Oil field:
Well number:
SY/T5289—2000
Appendix A
(Standard Appendix)
Format of fracturing effect evaluation table
Table A1 Production evaluation table
Construction unit:
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3m2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
Economic evaluation table
Construction unit:
Oil layer data
Output-input ratio
Payback period, d
Economic benefit, yuan
Evaluation unit
Technical evaluation table (see Table A3)
Porosity
Comprehensive score
Evaluator
Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible signature
Signature date
m*/min
m°/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Year/month/day
Total liquid Volume
Year Month Day
Total Liquid Volume
Oil Field:
Well Number:
Skin Coefficient Difference
Oil Production Index Ratio
Evaluation Unit
Reservoir Data
SY/T5289-—2000
Table A3 Technical Evaluation Table
Construction Unit:
Porosity
Comprehensive Score
Evaluator| |tt||Signature date
Permeability
10-3μm2
Oil saturation
Evaluation level
Technical unit
Responsible for signature
Signature date
m2/min
Construction date:
Construction parameters
Evaluation effect
Supervisory department
Signature date
Total liquid volume
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