Well test analysis control method for low permeability gas reservoir and method thereof

A control method and low-permeability technology, applied in earth-moving drilling, wellbore/well components, etc., to achieve the effect of easy promotion, saving test costs, and improving accuracy

Inactive Publication Date: 2009-10-21
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems encountered in the production of low-permeability gas reservoirs pointed out in the above-mentioned prior art, the present invention provides a well test analysis control system and method for low-permeability gas reservoirs that consider the slippage effect

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  • Well test analysis control method for low permeability gas reservoir and method thereof
  • Well test analysis control method for low permeability gas reservoir and method thereof
  • Well test analysis control method for low permeability gas reservoir and method thereof

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Embodiment 1

[0017] figure 1 It is a flow chart of the well test analysis and control method for low-permeability gas reservoirs in the embodiment of the present invention. The method in the embodiment of the present invention considers the influence of the slippage effect on the low-permeability gas reservoirs. The method includes the following steps:

[0018] 101: Measure the bottom hole pressure value of a gas well during a certain period of time, and obtain the relationship between pressure difference and time, that is, the pressure solution;

[0019] According to an embodiment of the present invention, the relationship includes a pressure difference versus time relationship and a derivative of the pressure difference versus time relationship.

[0020] According to the measurement step, the bottom hole pressure value of the gas well is obtained. How to obtain various parameters of the gas well according to the bottom hole pressure value so as to determine the production system of the g...

Embodiment 2

[0063] figure 2 It is a block diagram of a low-permeability gas reservoir well test analysis control system according to an embodiment of the present invention. The system mainly includes a gas well pressure measurement unit 21, a judgment unit 22, a well test interpretation parameter processing unit 23, and a well test analysis control unit 24, wherein:

[0064] The gas well pressure measurement unit 21 is used to measure the bottom hole pressure value of a gas well within a certain period of time, and obtain the relationship between the pressure difference and time, that is, the pressure solution. The relationship may include a pressure difference versus time relationship and a derivative of the pressure difference versus time relationship.

[0065] According to the embodiment of the present invention, the gas well pressure measurement unit 21 can be realized by a commonly used gas reservoir pressure measurement unit or measurement device, and the measurement results can be...

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Abstract

The invention provides a well test analysis control system for a low permeability gas reservoir and a method thereof. The method comprises the following steps: measuring bottom hole pressure value of a gas well in a period after well startup to obtain a relation value between pressure difference and time; judging whether the relation value equals a preset relation value, if yes, performing the next step, or correcting well test interpretation parameters corresponding to the preset relation value; taking the well test interpretation parameters corresponding to the preset relation value as the well test interpretation parameters of the gas well; analyzing gas permeation situation of the gas well according to the well test interpretation parameters so as to control exploitation of the well gas; wherein, the well test interpretation parameters comprise gas slip factor, low level permeability, skin factor, well bore storage coefficient, flow coefficient and formation pressure. The well testinterpretation according to the method perfectly accords with actual condition of the gas reservoirs, accurately describe the gas reservoirs, and provide a reference for determining production system.

Description

technical field [0001] The invention relates to the field of well test analysis for gas field development, in particular to a well test analysis control system and method for low-permeability gas reservoirs. Background technique [0002] Well testing is a technique to understand formation characteristics in the production process of modern oil and gas reservoirs. Well testing analysis is to obtain real-time static and dynamic parameters of formations through the analysis of bottom hole pressure changes, such as formation permeability, skin coefficient, well storage coefficient, Pressure boundary, etc., so as to provide a scientific basis for the rational exploitation of oil and gas reservoirs and the determination of stimulation measures for gas wells. [0003] In the process of modern well test analysis, it is necessary to obtain formation parameters through well test curve fitting and interpretation. For low-permeability gas reservoirs, the gas movement state in low-perme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 程时清李彦尊安小平杨天龙
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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