SY/T 6491-2000 Perforation test and evaluation of reservoir casing simulation well SY/T6491-2000 standard download decompression password: www.bzxz.net

1cs 73.020
Record number: 8166-21
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T64912000
Evaluation and perforating tesi for oil formation casing in model wel!2000- 12 - 12 Issued
National Bureau of Petroleum and Chemical Industry
2001060 Implementation
SY/T 6491-20-00
This standard is the standard for simulation and perforation test and evaluation of oil formation casing. The evaluation results of this standard are intuitive, reliable and comprehensive: the establishment of this standard can make up for the shortcomings of other technical requirements of casing, so as to ensure the casing's anti-explosion and impact performance of perforators and ensure the service life of oil and gas well casing.
This standard is proposed by China National Petroleum Corporation. This standard is under the jurisdiction of the Petroleum Well Logging Professional Standardization Committee. Drafting unit of this standard: China Petroleum and Natural Gas Group Gongju Oil and Gas Field Perforating Equipment Quality Supervision and Inspection Center: Main drafters of this standard Zhu Guibao Sun Xinbo Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Oil Layer Casing Simulation and Perforating Test and Evaluation SY/T 6491--2000
Evaluation and perforating test for oil fornation casing in model well This standard specifies the method, procedure and evaluation of oil layer casing simulation and perforating test. This standard is applicable to oil layer casing simulation meter perforating test and evaluation. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When the standard version is in edition, the versions shown are valid, all standards will be revised, and all parties using this standard should explore the possibility of using the latest version of the following standards. SY/I5128-1997 Technical Specifications for Energy-Concentrating Perforators in Oil and Gas Wells SY/T6297-1997 Recommended Practice for Perforator Evaluation in Oil and Gas Wells 3 Principle of the Method
The casing test target (see Figure 1) to be tested is lowered into the simulated well (the structure of the simulated well body is shown in Figure 2). Under the specified pressure and temperature conditions, the standard perforator is used to perforate the casing. The casing quality is evaluated by comprehensive analysis of the deformation and damage degree of the casing after perforation. .8~
1—Casing Coupling: 2—Upper Straightening Ring; 3—Maintenance and Expansion Casing; 4—Cement Ring; 5—Lower Straightening Ring: 6—Inspected Casing Figure 1 Schematic Diagram of Test Target Structure
4 Equipment for Testing
a) Simulated Well: The well depth is not less than 200m, and the inner diameter of the wellbore is not less than 335mm. Its structure is shown in Figure 2: Approved by the State Administration of Petroleum and Chemical Industry on 2000-12-12, 2001-06 -01 Implementation
Heating and pressurizing
SY/T6491—2000
1-cable; 2-sealing device; 3-elevator, 4-cement ring; 5-perforator; 6-inspected casing; 7-pressure pipe; 8-surface casing: 9-perforating medium; 10-sealing ball; 11-pressure valve seat; 12-perforating bullet; 13-maintenance sleeve: 14-pressure reducer
Figure 2 Schematic diagram of the wellbore structure of the simulated well
b) One drilling rig: the lifting force is not less than 300kN; c) One high-pressure pump: the rated working pressure is 35MPa; d) One cable winch: the cable length is not less than 400me) One medium pool: the volume is not less than 10m, and there is a heating device. 5 Inspection conditions
5.1 Inspection target
5.1.1 The curing sleeve is made of 2.0~2.5mm thick steel plate rolled and welded. There should be a 25mm annular space between its inner wall and the outer wall of the casing to be inspected, and the casing should be centered. The length is determined by the length of the test perforator, generally not less than 7m. 5.1.2 Cement ring:
a) Use Class A oil well cement;
b) The relative density of cement slurry is 1.85~1.93, and fill the annular space between the curing sleeve and the casing, and then put it all into the simulated well for curing;
c) The cement ring curing temperature is 50~60℃; d) The cement ring curing time should be not less than 48h. 5.2 Standard perforators
SY/T6491-2000
For casing with an outer diameter greater than 114.3mm, select the 94DP15 type bodyless perforator, and for casing with an outer diameter not greater than 114.3mm, select the 50DP11 type bodyless perforator. The performance of the perforator shall comply with the provisions of SY/T5128. 5.3 Perforating conditions
a) Loading density: 10 rounds/m for 94DP15 type bodyless perforator, 12 rounds/m for 50DP11 type bodyless perforator; b) Perforator phase: 94DP15 type bodyless perforator is right spiral four-phase, 50DP11 type bodyless perforator is two-phase; c) 60 rounds of perforating bullets are put into each casing at one time, and the perforating bullets are assembled in sequence; d) The perforating fluid is clean water;
e) The well temperature during perforation is 50-60℃, and the well pressure is 18-20MPa. 6 Test method
It is carried out in accordance with the provisions of the perforation test of the perforator simulation well of oil and gas wells in SY/T6297. 7 Performance indicators after perforation of casing simulation well
The performance indicators after casing simulation and perforation are determined in Table 1. Performance index after perforation of casing simulation well
Inspection items
Evaluation index
8Evaluation rules
8.1 Sampling method
Maximum expansion of outer diameter
Maximum crack length
8.1.1 The inspection unit shall submit samples according to the production batch. 8.1.2 The sample size is 3 randomly selected from each batch. 8.2 Test validity
Maximum crack width
Crack porositybzxz.net
Maximum height of internal burr
For each perforation test, the penetration rate of the perforating bullet shall not be less than 95%, and the first and last holes shall be within 0.2m of the upper and lower cement sheath interfaces for the test to be valid.
8.3 Quality Assessment
8.3.1 If each batch of casing meets the requirements of Chapter 7, the batch of casing is judged to be qualified. 8.3.2 If one index of a single casing does not meet the requirements of Chapter 7, the batch of casing shall be doubled for re-inspection. If all the indicators meet the requirements of Chapter 7 after re-inspection, the batch of casing can still be judged to be qualified, otherwise it is judged to be unqualified.
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