气田开发

压敏效应对试井曲线特征的影响分析

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  • (1.中国石油大学石油工程教育部重点实验室|北京 102249;2.中国石油大学气体能源开发技术教育部工程研究中心|北京 102249;3.中国石油大学(北京)石油天然气工程学院|北京 102249)

收稿日期: 2008-08-19

  修回日期: 2008-09-19

  网络出版日期: 2009-04-10

基金资助

中国石油中青年科技创新基金项目“苏里格气田储层富集区块控制机理”(编号:04E7023)资助.

Effect of Stress-sensitivity on Well Test Curve Characteristics in Sandstone Gas Reservoirs

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  • 1. MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China|2. MOE Engineering Research Center of Gas Energy Sources Development Technology, China University of Petroleum, Beijing102249, China;  |3. Faculty of Petroleum and Natural Gas Engineering, China University of Petroleum, Beijing 102249, China)

Received date: 2008-08-19

  Revised date: 2008-09-19

  Online published: 2009-04-10

摘要

建立了具有压敏效应的试井模型,通过长庆苏里格气田气井的实例应用,分析了压敏效应对不稳定试井曲线特征的影响。应用考虑应力敏感渗流模型,不稳定压力动态试井曲线特征表明,拟压力及其导数曲线开始时为一直线,随着无因次渗透率模量的增加,曲线往上翘起,无因次渗透率模量越大,上翘越明显,此项特征可能是气井应力敏感的反映。此外,同一口井不同时间试井曲线特征不同,第2次解释储层渗透率都明显较第1次的值低,而且双对数曲线上翘得更早更快,表现出压敏效应对试井曲线的影响。研究结果有利于明确压敏效应对不稳定试井模型特征的影响,对我国压力敏感气藏不稳定试井分析具有一定的指导意义。

本文引用格式

田冷, 何顺利, 顾岱鸿 . 压敏效应对试井曲线特征的影响分析[J]. 天然气地球科学, 2009 , 20(2) : 297 -299 . DOI: 10.11764/j.issn.1672-1926.2009.02.297

Abstract

In order to study the effect of stress-sensitive permeability on transient pressure in sandfacies, this paper uses the concept of permeability modulus, and presents a pressure transient well-test model for stress-sensitive fissured composite gas reservoirs, which includes strong nonlinear equations. Uses of transformation to linearize the equations have been presented to solve the nonlinear equations and to get zero\|order solution. The result is as follows: at the beginning, the characteristic curves of pseudo-pressure function and its derivative curves are linear lines and then they rise up with increase of dimensionless permeability modulus, which are similar to the model characteristic of no stress-sensitive fissured composite gas reservoirs with close out boundary or low permeability gas reservoirs.

参考文献

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