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Test device and test method of simulating well concentration cement slurry displacement efficiency

A technology of cementing slurry and displacement efficiency, which is applied in earthwork drilling, wellbore/well components, construction, etc., which can solve the problems of nuclear radiation risk, high test cost, inability to continuously analyze the displacement process, etc., and achieve reliable hardware support Effect

Inactive Publication Date: 2013-06-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, at present, the cement slurry displacement efficiency simulation tests of petroleum engineering at home and abroad use relatively traditional test platforms and measurement methods. These traditional devices often have certain shortcomings: the full-scale displacement simulation test device adopts the direct section method for measurement, and the test cost is large. The displacement process cannot be continuously analyzed; the actual density cement slurry and the casing displacement test device of similar size are measured by the radiation method, and there is a danger of nuclear radiation at one time; the similar liquid simulation small gap displacement test device usually adopts high-speed photography (tracer atom method ) measurement method, all wellbores and fluids must be transparent, so it is often impossible to simulate real fluids; the annular fluid replacement simulation evaluation instrument is measured by high-precision velocity sensors, which can only simulate small gap cementing with unconventional wellbore structures

Method used

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  • Test device and test method of simulating well concentration cement slurry displacement efficiency
  • Test device and test method of simulating well concentration cement slurry displacement efficiency
  • Test device and test method of simulating well concentration cement slurry displacement efficiency

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, the slurry mixing and circulation displacement system is composed of a slurry mixing tank, pipelines, valves, pumps and mixers connected to form a drilling fluid slurry mixing and circulation displacement system and a displacement fluid slurry mixing and circulation displacement system, two sets The slurry mixing and circulating displacement system is connected to the annulus return nozzle and the casing inlet nozzle of the wellbore system through common and / or independent nozzles. Combine below figure 1 Explain the slurry mixing and circulation displacement system:

[0025] figure 1 Among them, 1-9 are three-way valves to control the flow of fluid; 10 and 11 are the drain valve of the displacing fluid mixing tank and the emptying (fluid) valve of the drilling fluid mixing tank respectively; 12 is the drilling fluid mixing tank (considering the circulation) pool; 13 is the displacing fluid (cement slurry) mixing slurry (considering the circulation) pool;...

Embodiment 2

[0028] Embodiment 2, reference width figure 2 and 3 , in the figure, 27 is the inclination angle regulator, which adjusts the inclination angle of the wellbore system; 28, the wellbore support base; 29, the angle adjustment motor; 30, the support wall, supporting the wellbore system; 31, the wellbore fixed slips, used to fix the wellbore ; 32 is the wellbore; 33 is the connecting flange, connecting the wellbore and the test section; 34 is the wellbore of the test section, which can be installed with different measurement systems; 35 is the liquid return nozzle of the annular space, connected figure 1The slurry return nozzle 24 in the figure; 36 is the wellbore packer; 37 is the casing liquid inlet nozzle; 38 is the casing; 39 is the bottom hole packer.

[0029] The wellbore system includes a wellbore 32 and a casing 38 sheathed in the wellbore. The bottom end of the wellbore 32 is closed by a bottom hole packer 39 and then cooperates with the bottom end of the casing 38 to f...

Embodiment 3

[0038] Embodiment 3, the test method based on above-mentioned experimental device comprises:

[0039] For different test purposes and test methods, the device is designed to carry out simulation tests with measurement methods suitable for various displacement efficiency measurement methods:

[0040] (1). Cementation effect analysis method: When the cementation effect analysis method is used, the simulated formation core is used, and a core holder needs to be installed outside the inner cylinder. Formation cores or simulated formation cores are used to make a pilot test section 34 of a simulated wellbore, and then real drilling fluid, spacer fluid and flushing fluid and cement slurry are used. The mud cake is formed by simulating the drilling fluid flowing through the simulated formation, and then the flushing fluid or spacer fluid is used to carry out the displacement test, and then the simulated formation is taken out for the cementation test with the cement slurry, and the d...

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Abstract

The invention provides a test device of simulating well concentration cement slurry displacement efficiency. The test device of simulating well concentration cement slurry displacement efficiency comprises a shaft system, a device rack system, a slurry mixing system and a circulation displacement system, and the device rack system, the slurry mixing system and the circulation displacement system mate with the shaft system. The shaft system comprises a shaft and a sleeve which is sleeved in the shaft. The bottom end of the shaft is closed, and the top end of the shaft is an outlet which is connected with the circulation displacement system in a mobile mode. A gap which is arranged between the bottom end of the sleeve and the bottom end of the shaft forms a circulation passage, and the top end of the sleeve is an inlet which is connected with the circulation displacement system. The invention further provides a method of using the device of simulating well concentration cement slurry displacement efficiency to conduct a well concentration cement slurry displacement efficiency simulation experiment. The test device and the test method of simulating well concentration cement slurry displacement efficiency can simulate displacement action of cement slurry in different flow states, detect the displacement efficiency of the cement slurry under conditions of a plurality of well deviation angles, shafts with different sizes and different degree of eccentricity in real-time and can conveniently conduct a multi-angle omnibearing experiment.

Description

technical field [0001] The invention relates to a cementing simulation test device for petroleum well completion and a method for indoor test using the device. Background technique [0002] The cementing cement displacement efficiency simulation device used indoors, due to the limitation of the indoor site, the device should not only be small in size, easy to operate, easy to measure and collect data, but also be able to completely simulate the displacement of drilling fluid by cement slurry in the downhole The process, as well as the displacement under different flow regimes, provide technical guidance for the optimization of cementing parameters. [0003] However, at present, the cement slurry displacement efficiency simulation tests of petroleum engineering at home and abroad use relatively traditional test platforms and measurement methods. These traditional devices often have certain shortcomings: the full-scale displacement simulation test device adopts the direct sect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B47/005
Inventor 彭志刚冯茜王绍先徐璧华齐志刚王毅周卫红苗勇曹会莲魏绪伟魏新芳曹成章许婵婵
Owner CHINA PETROLEUM & CHEM CORP
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