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Water breakthrough risk evaluation method and evaluation device for water-carrying gas reservoir gas well

A technology for risk assessment and gas wells, which is applied in earth-moving drilling, drilling equipment, wellbore/well components, etc., and can solve problems such as difficulty in objectively and truly reflecting the water breakthrough risk of gas wells in water and gas reservoirs

Inactive Publication Date: 2015-02-25
PETROCHINA CO LTD
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Problems solved by technology

Therefore, it is difficult to objectively and truly reflect the actual water breakthrough risk of gas wells in gas reservoirs with water in the current water breakthrough risk assessment results obtained based on existing technologies.

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  • Water breakthrough risk evaluation method and evaluation device for water-carrying gas reservoir gas well
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  • Water breakthrough risk evaluation method and evaluation device for water-carrying gas reservoir gas well

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Embodiment Construction

[0062] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0063] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0064] refer to figure 1 As shown, the water breakthrough risk assessment method for a gas well in a gas reservoir with water in the embodiment of the present invention includes the following steps:

[0065] Step S101, constructing evaluation factors that affect the risk of water breakthrough in gas wells in gas reservoirs with water. In the embodiment of the present invention, the evaluation factors affecting the water breakthrough risk of gas wel...

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Abstract

The invention provides a water breakthrough risk evaluation method and evaluation device for a water-carrying gas reservoir gas well. The method includes the following steps that an evaluation factor which influences a water breakthrough risk of the water-carrying gas reservoir gas well is built; the weight vector of the evaluation factor is obtained on the basis of the analytic hierarchy process; a fuzzy relation matrix between the water breakthrough risk of the water-carrying gas reservoir gas well and the evaluation factor is built; the fuzzy relation matrix and the weight vector are combined according to a weighted average fuzzy composition operator, and a comprehensive evaluation result of the water breakthrough risk of the water-carrying gas reservoir gas well is obtained. The water breakthrough risk evaluation method and evaluation device improve accuracy of the evaluation result of the water breakthrough risk of the gas well, and the evaluation result which more accords with actual water breakthrough risk situations of the water-carrying gas reservoir gas well can be obtained.

Description

technical field [0001] The invention relates to the technical field of natural gas development, in particular to a water breakthrough risk assessment method and an assessment device for a gas well in a gas reservoir with water. Background technique [0002] For the development of gas reservoirs with strong edge and bottom water energy, once a gas well sees water, it will not only cause a lot of troubles in engineering aspects such as ground treatment, but also greatly reduce the productivity of the gas well, resulting in premature shutdown of the gas well due to low production. Thus greatly affecting the recovery rate of gas reservoirs and the final development effect. Therefore, it is an important research project in the process of gas reservoir development to evaluate the water breakthrough risk of gas wells in water gas reservoirs. [0003] At present, the evaluation of water breakthrough risk in gas wells at home and abroad mainly focuses on the prediction of water brea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06E21B41/00E21B44/00E21B2200/22E21B47/00E21B49/00
Inventor 李勇李保柱夏静彭晖张晶焦玉卫蒋漫旗
Owner PETROCHINA CO LTD
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