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1、石油勘探与开发2009年8月PETROLEUMEXPLORATIONANDDEVELOPMENTVol.36No.4513文章编号:10000747(2009)04051306部分射开井流线数值试井解释模型及压力响应姚军,吴明录(中国石油大学(华东)石油工程学院)基金项目:中国博士后科学基金资助项目(20080431219)摘要:建立了部分射开井的流线数值试井解释模型,模型包括生产阶段的渗流数学模型和测试阶段的流线数学模型,采用流线方法和有限差分方法分别对生产和测试阶段的数学模型进行数值求解,得到了
2、部分射开井的压力响应特征曲线。对流线分布和压力响应特征曲线的综合分析表明,部分射开井的压力导数曲线出现两条水平直线段。研究了渗透率比、射开厚度比、射孔部位对压力响应特征的影响,结果表明,渗透率比越大,第2条径向流水平直线段出现的时间越早;射开厚度比越小,两条水平直线段的高度差越大;射开部位对压力响应的影响不大。认为渗透率比和射开厚度比对压力响应有较大的影响,是试井解释必须考虑的重要影响因素。图11参18关键词:部分射开;数值试井;解释模型;流线分布;压力响应中图分类号:TE353文献标识码:AStreamlinenumericalwelltest
3、inginterpretationmodelandpressureresponseforpartiallyperforatedwellsYaoJun,WuMinglu(SchoolofPetroleumEngineering,ChinaUniversityofPetroleum,Dongying257061,China)Abstract:Astreamlinenumericalwelltestinginterpretationmodelforpartiallyperforatedwellswasestablishedthatincludesafiltr
4、ationmathematicalmodelofproductionperiodandastreamlinemathematicalmodeloftestingperiod.Pressureresponsecharacteristiccurvesforpartialperforatedwellswereobtainedbysolvingthemodelsofthetwoperiodsusingstreamlinemethodandfinitedifferencemethod,respectively.Pressureresponsecharacteris
5、ticsforpartiallyperforatedwellswereobtainedbyanalyzingsyntheticallythestreamlinedistributionandthepressureresponsecharacteristiccurves.Twohorizontalstraightlinesegmentswillemergeinthederivativecurve.Theinfluenceofpermeabilityratio,perforationthicknessratioandperforationlocationon
6、pressureresponsewasinvestigated.Thelargerthepermeabilityratiois,theearlierthesecondhorizontalstraightlinesegmentwillemerge.Thelesstheperforationthicknessratiois,thegreaterthedistancebetweenthetwohorizontalstraightlinesegmentswillbe.Theimpactofperforationlocationonpressureresponse
7、islittle.Permeabilityratioandperforationthicknessratiohavesignificanteffectsonthepressureresponseandtheymustbetakenintoaccountinwelltestinginterpretationforpartiallyperforatedwells.Keywords:partialperforation;numericalwelltesting;interpretationmodel;streamlinedistribution;press
8、ureresponse0引言1部分射开井流线数值试井解释模型在以Horner方法
