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储层岩石压缩系数的一种预测方法
断块油气田
2009年 16卷 第01期
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Title
Aprediction method for reservoir rock compressibility
单位
成都理工大学油气藏地质与开发工程国家重点实验室,四川 成都 610059
西南油气田分公司蜀南气矿,四川 泸州 642150
Organization
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
Shu’nan Gas Production Plant, Southwest Oilfield Company, CNPC, Luzhou 642150, China
摘要
岩石压缩系数是油藏工程研究中的一个重要参数,它标志着油气开采过程中岩石所能提供的能量大小。实际应用时,如果按照经验公式求取岩石压缩系数,往往会产生较大误差。为此,引入近年来预测效果较好的支持向量回归机技术,以压力、孔隙度为输入参数,建立支持向量回归机预测模型,用来对未知地层岩石压缩系数进行预测。实际应用表明,预测结果与岩石实际压缩系数之间的相对误差基本都控制在允许范围之内,可见该方法的预测效果很好,可行性高,从而为油气储层岩石压缩系数的预测求取开拓了一种新思路。
Abstract
Rockcompressibilityisaveryimportantparameterin the study ofreservoirengineering.Itindicatesthathowmuch energy therock
canprovideduringtheoilandgasexploitation.Inpracticalapplication,ifwecalculatetherockcompressibilityaccordingtotheempirical
formula, theresultwillcausemajorerror.Therefore,thispaperintroducesamethodofsupportingvectorregression,which haspreferable
forecasting effect to set up the forecasting model for rock compressibility of the unknown reservoir. In this model, we take pressure and
porosityasinputtocalculaterockcompressibility.The resultindicatesthatthe fractionalerrorbetweenthepredictionresultandthereal
valueisverysmall,sothismethodhaspreferableeffectandfeasibility,which affords anewclueofcalculatingrockcompressibilityforoil
andgasreservoir.
关键词:
岩石压缩系数;
油藏工程;
经验公式;
支持向量回归机;
储层;
Keywords:
rock compressibility, reservoir engineering, empirical formula, supporting vector regression, reservoir;