A Measuring Method for Stress Sensitivity of Tight Gas Reservoir

A technology of stress sensitivity and measurement method, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve the problems of high cost and low accuracy of stress sensitivity of tight gas reservoirs

Active Publication Date: 2017-12-05
PETROCHINA CO LTD
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Problems solved by technology

[0003] However, in the prior art, the low-permeability tight cores in the oil and gas wells need to be extracted, and the cost of extracting the cores is relatively high, and there are sometimes large differences between the extracted cores and other cores in the tight gas reservoirs of the oil and gas wells , so that the accuracy of the stress sensitivity of the tight gas reservoir of the oil and gas well obtained by extracting the core and then analyzing the core is not high

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  • A Measuring Method for Stress Sensitivity of Tight Gas Reservoir
  • A Measuring Method for Stress Sensitivity of Tight Gas Reservoir
  • A Measuring Method for Stress Sensitivity of Tight Gas Reservoir

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Embodiment Construction

[0022] The invention provides a method for measuring the stress sensitivity of tight gas reservoirs, which can improve the accuracy of the measured stress sensitivity of tight gas reservoirs and effectively reduce the cost.

[0023] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, the embodiment of the present invention provides a method for measuring the stress sensitivity of tight gas reservoirs, the method comprising:

[0025] Step 101: Perform pressure recovery well test interpretation and production performance analysis and interpretation on an oil and gas well, and obtain the formation pressure of the tight gas reservoir of the oil and gas well, the first effective permeability of the tight gas reservoir and the Formation compression profile of tight gas reservoirs;

[0026] Step 102: Perform linear regression analysis on the formation pressure and the fir...

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Abstract

The invention discloses a method for measuring stress sensitivity of a tight gas reservoir. The method comprises the following steps of carrying out pressure recovery well test interpretation and production dynamic analysis interpretation on an oil-gas well; acquiring formation pressure of the tight gas reservoir of the oil-gas well, first effective permeability of the tight gas reservoir, and a formation pressure profile of the tight gas reservoir; carrying out linear regression analysis on the formation pressure profile and the first effective permeability, and acquiring a regression model with pressure corresponding to the effective permeability; confirming the second effective permeability of the tight gas reservoir according to the regression model; measuring the stress sensitivity of the tight gas reservoir based on the second effective permeability.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to a method for measuring the stress sensitivity of tight gas reservoirs. Background technique [0002] In the existing process of oilfield exploitation, the formation pressure gradually decreases, and the effective stress acting on the rock particles increases. This effect causes the deformation of the rock, resulting in stress sensitivity, which reduces the permeability of the rock, thereby affecting the flow of fluid. and production capacity, which brings many difficulties and problems to efficient and reasonable development. For this reason, the existing technology usually extracts low-permeability tight cores in oil and gas wells, measures the effective permeability of the low-permeability tight cores, and then based on the low The effective permeability of the tight core is used to obtain the stress sensitivity of the tight gas reservoir of the oil and gas well. [000...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 于孝玉张英魁李晓松王志文孙胜宇陈振龙张慧宇徐洪明张菊红霍宏宇周萍
Owner PETROCHINA CO LTD
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