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Prediction method of dry gas huff and puff effect of high-water-content compact condensation gas reservoir

A condensate gas reservoir, compact technology, used in earth-moving drilling, wellbore/well components, etc.

Active Publication Date: 2018-05-04
PETROCHINA CO LTD
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Problems solved by technology

[0006] In order to solve the optimization problem of dry gas huff and puff parameters of high water-cut tight condensate gas reservoirs, the present invention provides a prediction method for dry gas huff and puff effects of high water-cut tight condensate gas reservoirs

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  • Prediction method of dry gas huff and puff effect of high-water-content compact condensation gas reservoir

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Embodiment Construction

[0058] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0059] This example provides a method for predicting the effect of dry gas huff and puff in tight gas condensate reservoirs with high water cut, see figure 1 , the method flow is as follows:

[0060] Step 101: Obtain factors influencing recovery of dry gas huff and puff in tight condensate gas reservoirs with high water content, and determine the value range of the factors, which include geological parameters and injection-production parameters;

[0061] Specifically, in order to study the effect of dry gas huff and puff in high water-cut tight condensate gas reservoirs, firstly, from the perspective of geological parameters, the factors affecting the recovery of high water-cut tight condensate gas reservoirs are comprehensively analyzed. The main geol...

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Abstract

The invention discloses a prediction method of a dry gas huff and puff effect of a high-water-content compact condensation gas reservoir, and belongs to the technical field of oil and gas field development. The prediction method comprises the steps that influence factors of the recovery ratio of dry gas huff and puff of the high-water-content compact condensation gas reservoir are obtained, the value ranges of the influence factors are determined, and the influence factors comprise geologic parameters and injection-production parameters; according to the influence factors of the recovery ratioof dry gas huff and puff of the high-water-content compact condensation gas reservoir and the value ranges of the influence factors, a recovery ratio increment prediction model of dry gas huff and puff of the high-water-content compact condensation gas reservoir under interaction of the multiple influence factors is established by utilizing a response surface method; and according to the recoveryratio increment prediction model and the geologic parameters of a to-be-exploited gas reservoir, the recovery ratio increment extreme value, the optimal injection volume and the optimal gas injectiontime within the value ranges of the injection-production parameters are obtained. The prediction method is provided for the dry gas huff and puff effect of the high-water-content compact condensationgas reservoir, the injection-production parameters are accurately and quantificationally optimized, so that injected dry gas is utilized maximally.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, in particular to a method for predicting the effect of dry gas huff and puff in tight condensate gas reservoirs with high water content. Background technique [0002] High water-cut tight condensate gas reservoirs are low-porosity, tight reservoirs with high water saturation and poor fluid seepage capacity. During the development of tight gas condensate reservoirs with high water content, due to the complex phase change of the fluid, condensate oil will be precipitated in the formation, forming a three-phase co-seepage of oil, gas and water, which will further increase the resistance of seepage. The dry gas huff and puff technology, as one of the methods to effectively improve the recovery of tight gas condensate reservoirs with high water content, has received extensive attention. [0003] The existing dry gas huff and puff technology for tight gas condensate reservoirs wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 李骞李鹭光钟兵杨洪志徐伟邓惠常程李明秋杨柳
Owner PETROCHINA CO LTD
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