Indoor simulation device for testing injection/pressure fall of coal bed methane
A simulation device and coalbed methane technology, applied in the direction of measurement, production fluid, wellbore/well components, etc., can solve the problems of coalbed methane reservoirs without strict demonstration and exact data description, and testing methods are difficult, and achieve the goal of improving accuracy Effect
Inactive Publication Date: 2013-05-01
INST OF MECHANICS CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, because coalbed methane belongs to unconventional gas reservoirs, it is difficult to accurately apply the testing methods of conventional oil and gas reservoirs to coalbed methane reservoirs.
Injection pressure drop test is one of the main means of coalbed methane well testing at present, but the basic principle of injection pressure drop test is based on the test theory of conventional oil and gas reservoirs. There is no strict demonstration of the applicability and accuracy of unconventional natural gas such as coalbed methane. and exact data description
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] Such as Figure 1 to Figure 3 As shown, an indoor simulation device for coalbed methane injection pressure drop test includes a coalbed simulation device, an injection system, a data testing system for injection pressure drop, and a data acquisition system. The coalbed simulation device includes a shell 1, which is arranged in the shell 1 for A plurality of hollow rubber balls 2 for simulating gas compressibility, and a rubber elastic body 3 for simulating formation elasticity are also arranged on the inner wall of the casing 1 . The injection system includes an injection shaft 4, an injection pump 5, and a water tank 6. The top of the injection shaft 4 is connected to the injection pump 5 and the water tank 6 through a water pipe, and a flow tester 7 is also arranged on the water pipe.
[0016] A pressure test section 8 is set inside the injection wellbore 4, and a data test system for injection pressure drop is set in the pressure test section 8. The data test system ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an indoor simulation device for testing injection / pressure fall of coal bed methane. The device comprises a coal bed simulation device, an injection system, a date test system for the injection / pressure fall and a data acquisition system. The injection system injects water into the coal bed simulation device at set displacement within a set period of time, so that pressuredistribution regions in which the pressures are higher than the original internal pressure of the coal bed simulation device are produced in an injection mineshaft of the injection system and the cold bed simulation device; after water injection is stopped, a water injection pressure is gradually balanced with the original internal pressure of the coal bed simulation device; the change of the pressure in the injection mineshaft along with time is measured by using the data test system in an injection stage and a pressure fall stage; and the data acquisition system records and analyzes the pressure change to obtain a response parameter in the coal bed simulation device in each stage. The indoor simulation device for testing the injection / pressure fall of the coal bed methane disclosed by the invention contributes to implementing and knowing a test on the injection / pressure fall better, knowing the principle of the injection / pressure fall test, and improving the accuracy of the injection / pressure fall and the correctness of data evaluation.
Description
technical field [0001] The invention relates to the technical field of oil and gas production engineering, in particular to an indoor simulation device for testing pressure drop of coal bed gas injection. Background technique [0002] Coalbed methane is an efficient and clean unconventional natural gas resource. At present, coalbed methane resources are actively developed at home and abroad to alleviate the energy crisis, and to carry out sustainable energy development on the premise of protecting the environment. Large-scale commercial development of coalbed methane in my country is imminent. Reasonable and efficient development of coal seam resources must rely on the dynamic monitoring of coalbed methane, and coalbed methane well testing technology is the main source of dynamic data for the formulation and adjustment of coalbed methane reservoir development plans, which can be called the glasses of coalbed methane reservoir engineers. However, because coalbed methane belo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/06E21B43/20
Inventor 刘曰武赵培华张钧峰苏中良欧阳伟平
Owner INST OF MECHANICS CHINESE ACAD OF SCI