SY/T 5276-2000 Determination of flexural strength, compressive strength and gas permeability of artificial core for chemical sand controlSY/T5276-2000 Standard download decompression password: www.bzxz.net

ISC 75.020
Registration No.: 8186—2001
Petroleum and Natural Gas Industry Standard of the People's Republic of ChinaSY/T 5276—2000
Test method for flexural strength, compression strengthand air permeability of chemical sand consolidation in man-made core2000-1212 issued
National Petroleum and Chemical Industry Bureau
2001-06-01 implementation
SY/T5276-2000
This standard is based on SY5276--91 "Chemical Sand Control Core Flexural, Compressive Strength and Permeability Determination Method" in the use of oil fields across the country and the needs of technological progress in recent years. This standard has modified the standard name, flexural strength calculation formula, compressive strength calculation formula and permeability calculation formula in the original standard, and deleted the inappropriate The applicable clauses and two appendices. This standard will replace SY5276--91 from the date of implementation. This standard was 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: Dagang Oilfield Group Drilling and Production Technology Research Institute. Who are the main drafters of this standard? Peng Yao, Zeng Qinguo, Ma Jianmin, Ji Xiaodong, Li Huaiben. The original standard was first issued in July 1991, and this is the first revision. 1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Test method for flexural strength, compression strength and air permeability of chemical sand consolidation in man-made cores SY/T 5276—2000
Replaces SY 5276—91
This standard specifies the method for measuring the flexural strength, compressive strength and volume permeability of artificial cores made in chemical sand control research experiments at room temperature. This standard is applicable to the measurement of the above three parameters of artificial cores. Formation cores can also be used as a reference: 2 Measurement of flexural strength 2.1 Instruments and equipment a) Electric flexural testing machine (accuracy is +1.0%); b) Vernier caliper: 2.2 Sample requirements 2.2.1 Sample specifications: diameter 2.50cn=0.10cm; length 13.00cm=1,00cm 2.2.2 Group by core type, each group of samples shall not be less than 3 pieces, 2.2.3 The samples shall not have missing photos or cracks, and the impurity particles on the surface of the samples shall be cleaned before measurement. 2.3 Measurement steps 2.3.1 Measure the diameter at the center of the sample, and it should be accurate to 0.01cm. 2.3.2 Remove the sticky matter on the surface of the cylindrical blade of the fixture and make the lever balanced under no-load condition. 2.3.3 Put the sample in, make the sample perpendicular to the blade [1, and the distance between the two supporting blades [1 and the end surface of the sample is equal. 2.3.4 Turn on the power and operate according to the instrument manual. 2.3.5 After the sample is broken, read the value on the scale. The accuracy of the apparent value should be less than 1.0%. 2.4 Calculation of measurement results and data processing
2.4.1 Substitute the measured data into formula (1) to calculate the flexural strength. The calculation result should be accurate to 0.01MIag8FL
×10-2
Where: 『---Flexural strength, MFa;
F——Instantaneous load at fracture, N;
D—Diameter, cm;
L——Support μ column center distance, cm; its value is 10.0cm2.4.2 Data processing shall be carried out according to the following principles: (1)
a) When the maximum relative error of the flexural strength measurement values ​​of each group of samples is less than or equal to 15%, their average value shall be taken as the measurement result. The relative error shall be calculated according to formula (2): State Administration of Petroleum and Chemical Industry 2000-12-12 Approved 2001- 06 - 01 Implementation
Where: u
relative error;
-measured value of flexural strength, MPa;
-average value of flexural strength, MPa.
SY/T5276—2000bzxZ.net
b) When the relative error of the measured value of the flexural strength of a sample is greater than 15%, the measured value of the core should be discarded, and the remaining measured values ​​should be calculated according to the above method until they meet the requirements. c) If the number of flexural strength measured values ​​of a group of samples that are finally discarded reaches 60% of the group of samples, the samples should be re-sampled and measured. 3 Determination of compressive strength
3.1 Instruments and equipment
a) Material pressure testing machine (accuracy is ±1.0%): b) Vernier caliper.
3.2 Sample requirements
3.2.1 Sample specifications: diameter 2.50cm±0.10cm; length 2.50cm±0.10cm. 3.2.2 Group by core type, each group of samples shall not be less than 3 pieces. E8
3.2.3 Both ends shall be ground flat and kept parallel, without defects or cracks, and impurity particles on the sample surface shall be cleaned before measurement. 3.3 Measurement steps
3.3.1 Measure the diameter and length of the sample, and the value shall be accurate to 0.01cm. 3.3.2 Instrument operation steps shall be carried out according to the instrument manual. 3.4 Calculation and data processing of measurement results
3.4.1 Substitute the measured data into formula (3) to calculate the compressive strength, and the calculation result shall be accurate to 0.01MPa. US
Compressive strength, MPa;
Where: P
F. —Instantaneous load at failure, N;
Cross-sectional area, cm2.
3.4.2 Data processing shall be carried out in accordance with 2.4.2.
4 Determination of gas permeability
4.1 Instruments and equipment
a) Gas permeability tester (accuracy is ±5%); b) Vernier caliper;
c) Stopwatch;
d) Barometer;
e) Thermometer.
4.2 Sample requirements
A×10~2
4.2.1 Cut the core sample, remove the surface debris, and make the core end face perpendicular to the axis. 4.2.2 Sample specifications: diameter 2.50cm±0.10cm; length 2.50cm±0.10cm4.2.3 Group by core type, and each group of samples shall not be less than 3 pieces. 4.2.4 Place the sample in a constant temperature box, dry it at 105-110℃ for 4h, and cool it to room temperature in a drying oven. 2
4.3 Determination steps
Operate according to the instruction manual of the gas permeability meter. 4.4 Calculation and data processing of measurement results
SY/T5276—2000
4.4.1 Calculate the permeability according to formula (4), and the calculation result should be accurate to 0.01um2. 2QoLp
Kg=A(p-ps)
×10-!
In the formula: K.
gas permeability, umz;
gas flow rate under atmospheric pressure, cm/s;
cross-sectional area, cm;
length, cm;
gas viscosity, mPas;
P1——core inlet pressure, MPa;
P2——core outlet pressure, MPa:
P.——atmospheric pressure, MPa.
4.4.2 Data processing shall be carried out in accordance with the following principles: a) Calculate the relative error of the measurement value of each sample according to formula (2); -(4)
b) When the relative error of the permeability measurement value of any sample in each group of samples is less than or equal to 10%, their average value shall be taken as the measurement result;
c) When the relative error of the permeability measurement value of a certain sample is greater than 10%, the measurement value of the core shall be discarded, and the remaining measurement values ​​shall be calculated again according to the above method until they meet the requirements; d) If the number of measurement values ​​of a group of samples finally discarded reaches 60% of the samples in that group, re-sampling shall be carried out.
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