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1、第31卷第2期测井技术Vol.31No.22007年4月WELLLOGGINGTECHNOLOGYApr2007文章编号:1004O1338(2007)02O0128O07套管井阵列声波测井技术研究及应用1,42233吴海燕,沈建国,任月娥,肖坤德,黄奇源(1.天津大学电气与自动化工程学院,天津300072;2.天津大学声波测井实验室,天津300072;3.中原石油勘探局测井公司,河南濮阳457001;4.中国石化胜利石油管理局测井公司,山东东营257096)摘要:针对套管井阵列声波测井的工程需要
2、,用实轴积分法及二维谱技术研究了不同胶结状况的二维谱及频散曲线。从理论上肯定了对于快速地层,胶结状况良好和第Ⅰ界面窜槽不严重时在套管井内能够测量到地层的纵、横波时差。描述第Ⅰ界面窜槽的等效水环厚度增加,以地层的纵、横波速度传播的声波时差分布不再集中,直到最后消失。第Ⅱ界面脱粘时无法测量到地层的纵、横波时差。根据上述理论计算结果设计了阵列声波测井仪器,用多口套管井的实际测量波形和处理结果肯定了上述理论分析,得到了地层的纵、横波时差。这样,对于套管井,除了能够测量地层的纵、横波时差外,从固井质量评价上
3、,第Ⅰ界面胶结质量的判别方法还可以使用相位信息,即用阵列波形的相位建立模型,得到地层纵波时差分布,该分布越离散,则第Ⅰ界面胶结的程度越差;当集中不起来,不能够显示地层的纵波时差时,则第Ⅰ界面窜槽已经相当严重。关键词:生产测井;套管井;阵列声波测井;实轴积分法;二维谱;时差中图分类号:P631151;O17717文献标识码:AAResearchonArraySonicLoggingTechnologyinCasedHoleandItsApplication1,42234WUHai2yan,SHENJ
4、ian2guo,RENYue2e,XIAOKun2de,HUANGQi2yuan(1.SchoolofElectricalEngineeringandAutomation,TianjinUniversity,Tianjin300072,China;2.SonicLoggingLab.,TianjinUniversity,Tianjin300072,China;3.WellLoggingCompany,ZhongyuanPetroleumExplorationBureau,Puyang,Henan4
5、57001,China;4.WellLoggingCompany,ShengliPetroleumAdministration,SINOPEC,Dongying,Shandong257096,China)Abstract:Aimedattheengineeringrequirementofarraysonicloggingincasedhole,therealaxisintegrationand22dimensionalspectrummethodareusedtocalculate22dimen
6、sionalspectraanddispersioncurvesindifferentbondingconditions.Forfastformation,thetheoreticalanalysisaf2firmedthatSandPwaveslownessofformationcanbemeasuredifthecasedholeisingoodce2mentedconditionandnoseriouschannelincasing2cementinterface;whenthickness
7、ofanequiva2lentwaterannulussimulatingthecasing2cementinterfacechannelingisincreased,sonicslownessdistributionofPandSwaveofformationisgraduallydispersedandfinallydisappeared;andifthecement2formationinterfaceisadhesivefailure,theslownessofPandSwaveoffor
8、mationwillnotbeabletobemeasured.Basedonabovementionedtheoreticalanalysis,anarraysonicloggingtoolisdesigned,itswaveformsmeasuredpracticallyinseveralcasedholesandtheirprocessingresultshaveaffirmedthetheoreticalanalysis,andsonicslownessesofPandSw