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A method and device for detecting the elasticity of oil and gas well cementing cement

A detection method and cement stone technology, which are applied in the field of oil and gas exploration and development, can solve the problems of poor repeatability of cement stone Young's modulus values, unable to reflect the mechanical nature of cement stone, and difficult to accurately evaluate the integrity of cement stone and wellbore integrity.

Active Publication Date: 2022-05-10
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, it may lead to a variety of different Young's modulus values ​​for the same cement stone, or the measured Young's modulus value of the cement stone has poor repeatability, which cannot reflect the mechanical nature of the cement stone, which will undoubtedly make it difficult to accurately Accurately evaluate the integrity of cement stone in the downhole environment and even the integrity of the entire wellbore

Method used

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  • A method and device for detecting the elasticity of oil and gas well cementing cement
  • A method and device for detecting the elasticity of oil and gas well cementing cement
  • A method and device for detecting the elasticity of oil and gas well cementing cement

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Embodiment 1

[0061] This embodiment provides a detection device for oil and gas well cementing cement elasticity, its structure is as follows figure 1 shown, including:

[0062] The loading rate and unloading rate determination module is used to determine the loading rate and unloading rate of cement stones according to the stress of cement stones and the time required for stress and unloading during different engineering measures;

[0063] The maximum loading load determination module is used to compare the conventional stress-strain curve according to the stress of the cement stone during different engineering measures to determine the maximum loading load of the cement stone;

[0064] The stress-strain curve determination module is used to perform multi-cycle triaxial stress tests on cement stones according to the loading rate, unloading rate and maximum loading load of cement stones under the experimental temperature and experimental pressure, and determine the stress-strain of cement ...

Embodiment 2

[0081] This embodiment provides a method for detecting the elasticity of oil and gas well cementing cement, which specifically includes the following steps: go to the gas storage injection-production well cementing site twice to get a large sample of cement and on-site potion (No. 3 elastic cement system, made of Provided by Schlumberger, and No. 2 micro-expansion cement system, provided by China National Petroleum Group Drilling Engineering Technology Research Institute);

[0082] Preparation and maintenance according to API specifications On-site sampling cement: No. 3 elastic cement, density 1.75g / cm 3 And No. 2 micro-expansion cement, density 1.75g / cm 3 ), after high temperature and high pressure curing (curing temperature 58°C, curing pressure 20.7MPa, curing time 7 days), take the core or directly cure the cement with a standard core mold to prepare a cement stone sample with a standard core size (Φ25.4mm ×50.8mm);

[0083] Determination of loading rate and unloading r...

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Abstract

A method and device for detecting the elasticity of cement stone in oil and gas well cementing. The detection method includes: determining the loading rate and unloading rate of cement stone; determining the highest loading load of cement stone; determining the temperature and pressure of cement stone experiment; determining the cement stone The stress-strain curve of the cement stone; the elasticity of the cement stone is described by the strain recovery degree of the cement stone in different cycles, and the long-term mechanical integrity of the cement stone is described by the damage degree of the cement stone in different cycles. Also provided is a detection device for cement stone elasticity of oil and gas well cementing. The detection method and device provide a unified comparison platform for cement modification research and special cement slurry system detection at home and abroad, and are of great significance for evaluating wellbore integrity and well life cycle.

Description

technical field [0001] The invention relates to a detection method and a device, in particular to a detection method and a device for cementing cement elasticity, and belongs to the field of exploration and development of oil and gas fields. Background technique [0002] Annular pressure is a major safety issue in the development and production of complex natural gas wells, and this problem exists worldwide. In the Outer Continental Shelf (OCS) region of the Gulf of Mexico, there are approximately 15,500 producing, shut-in and temporarily abandoned wells. The United States Mineral Management Service (MMS) conducted statistics on the wells in this area, and about 43% of the 6692 wells had at least one layer of casing annulus under pressure. Among the wells with pressurized annulus, a total of 10,153 layers of casing annulus were pressurized, of which 47.1% belonged to production casing, 16.3% belonged to technical casing, 26.2% belonged to surface casing, and 10.4% belonged ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
CPCG01N33/383G01N3/12G01N3/40G01N2203/0256G01N2203/0284G01N2203/0075G01N2203/0218G01N3/02G01N3/08
Inventor 郑友志孔波李杰马辉运桑宇杨涛谢明华焦利宾王福云夏宏伟余江谭其艳刘从箐陈骥付嫱赵晓丽郭枫林吴勇何轶果王斌王晓娇
Owner PETROCHINA CO LTD