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Dynamic testing method of gas cut resistance of operating fluid of oil-gas well

A technology of dynamic testing and working fluid, which is applied to measuring devices, weather resistance/light resistance/corrosion resistance, instruments, etc. It can solve the problems of no test method for air intrusion resistance and increase safety risks, so as to reduce maintenance cost and difficulty, The effect of enhancing applicability

Inactive Publication Date: 2015-01-21
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no test method for the anti-gas intrusion ability of the oil and gas well working fluid in the laboratory. difficulty

Method used

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  • Dynamic testing method of gas cut resistance of operating fluid of oil-gas well
  • Dynamic testing method of gas cut resistance of operating fluid of oil-gas well
  • Dynamic testing method of gas cut resistance of operating fluid of oil-gas well

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Embodiment Construction

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. And the features in the embodiments can be combined with each other.

[0031] Such as Figure 2 to Figure 5 As shown, the dynamic test method of oil and gas well working fluid anti-gas invasion ability according to the present invention adopts a multifunctional oil and gas well working fluid performance testing device, and the testing device includes an outer pipe 3, a central pipe 4, a simulated well bottom 6, and a temperature control device 7. Circulation filter device 8. Both the outer pipe 3 and the central pipe 4 are transparent and visible pressure-bearing pipe strings, so that it is convenient to observe the fluid condition in the pipe. The outer tube 3 is also provided with a height scale line, which is convenient...

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Abstract

The invention discloses a dynamic testing method of the gas cut resistance of an operating fluid of an oil-gas well. The dynamic testing method comprises the following steps: (a) preparing the operating fluid; (b) determining the initial density Rho0 of the operating fluid; (c) filling a testing device with the operating fluid; (d) preheating the simulation well bottom (6) to the reservoir temperature by a temperature control device (7); (e) starting up a circulation filtration device (8), and setting the circulation displacement of the operating fluid to be QL; (f) injecting a gas with the flow rate of Qg from testing holes (1-4), and starting to time; (g) sampling from sampling holes (1-3) every 5 minutes-15 minutes, and determining the density Rhoi of the operating fluid after gas cut under the initial density testing condition; (h) calculating the declining rate Ki of the density along with the gas cut time when the gas flow rate is Qg, and the circulation displacement of the operating fluid is QL; and (i) drawing a curve that the density of the operating fluid and the declining rate of the operating fluid are changed as the gas cut time. The features of the simulation oil-gas well and the gas cut resistance of the operating fluid of the oil-gas well under the dynamic circulation condition of the operating fluid can be determined.

Description

technical field [0001] The invention belongs to the technical field of experimental research and testing in the process of petroleum exploration and development, and specifically refers to a dynamic testing method for the anti-gas invasion ability of oil and gas well working fluid. Background technique [0002] Oil and gas well working fluid refers to the working fluid used in drilling, well completion, workover and other operations. Gas intrusion into the working fluid of oil and gas wells will reduce the density of the working fluid. Once the relative density is lower than the reservoir pressure coefficient, complex downhole accidents such as well kicks and blowouts will easily occur. Therefore, when selecting a working fluid, it is hoped that the working fluid itself has a certain ability to resist gas intrusion (that is, the density will not decrease after the gas invades the working fluid, or the working fluid is easy to degas). At present, there is no test method for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
Inventor 贾辉田艺欧阳铁兵梁玉凯吴绍伟廖云虎陈霄张瑞金杨波
Owner CHINA NAT OFFSHORE OIL CORP
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