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Formation testing process technology in exploration of oil and gas field

A technology of formation testing and process technology, which is applied in wellbore/well components, earthwork drilling and other directions, and can solve problems such as tool opening and incomplete well shut-in.

Inactive Publication Date: 2013-07-03
陈美玲
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For wells with a high formation pressure coefficient, the excessive differential pressure will cause destructive impact on the ball valve part of the test valve at the moment of opening and closing the well, resulting in incomplete opening and closing of the tool

Method used

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  • Formation testing process technology in exploration of oil and gas field

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Embodiment Construction

[0024] Through the test of many high-temperature and high-pressure deep wells containing H2S and CO2 corrosion in China, the actual construction often adopts the method of opening and closing the formation test well, and the shut-in time is generally 4-12 hours, and the well-opening time is 4-8 hours. The main limiting factors are: first, the downhole testing tool is subjected to complex forces and loads, and it is difficult to accurately open and shut down the well; the second is to directly and alternately change the working state of the downhole tool, which is not good for the protection of the tool seal. In the middle of the open hole test, due to the high risk of the test and the short test time (6-8 hours), generally only one well opening and one well closing are performed. Once the well is opened to obtain the productivity fluidity, once the well is shut down to obtain the formation pressure and parameters. When setting and testing the open hole section in the casing, t...

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Abstract

The invention relates to a formation testing process technology in the exploration of an oil and gas field. By the technology, the physical characteristics, the oil and gas content condition and the formation pressure of a reservoir can be rapidly known, the boundary property and the oil-containing area of a petroleum reservoir can be identified, open-flow capacity of a well is confirmed, the permeability of the reservoir is explained, the condition of damage of the well to a formation after the well is drilled and the flow conductivity can be evaluated, and the plane connectivity of the reservoir can be measured.

Description

Technical field [0001] The invention relates to formation testing technology in oil and gas field exploration, and belongs to the field of petroleum testing. Background technique [0002] Since the whole set of APR test tools is controlled by the annular pressure to open and close, the pressure bearing capacity of the tool and the casing and the determination of the pressure levels between the tools are all problems that need to be solved. The control of the test differential pressure should take into account the core permeability, reservoir characteristics, the angle of stable sand production on the borehole wall, the shear strength of the borehole wall rock, and the maximum pressure differential that the packer rubber barrel and downhole tools can withstand. For wells with a high formation pressure coefficient, the excessive differential pressure will cause destructive impact on the ball valve part of the test valve at the moment of opening and closing the well, resulting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 戈宝富杨怀成申忠玺李加明房国平吴勇龚明峰金强肖仁江黄天朋李晋任桂龙
Owner 陈美玲