基于埕东油田埕四北块井组提高采收率技术研究

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1、天津大学硕士学位论文埕东油田埕四北块井组提高采收率技术研究姓名：田养林申请学位级别：硕士专业：化学工程指导教师：宋宽秀;陈广2002.1.1摘要本文介绍针对高渗透油藏水驱开发至特高含水期，油藏储层因非均质严重、强注强采造成水驱指进，储层产生特高渗透条带：水驱开发稠油过程中因油稠、油水流度比大，以及油水界面张力大，水洗效率低，水驱效果差，导致水驱采出程度低等问题，开展提高采收率技术研究。在研究中主要从油层非均质、油水流度比和油水界面张力三个因素进行论证，提出了治理油层特高渗透条带、改善油水流度比和降低油水界面张力的

2、综合性提高采收率技术～堵驱结合、以堵为主的提高采收率新技术。同时根据PI决策技术研究了适用于这类油藏开发至特高含水期储层特征的调剖剂、驱油前置剂、驱油后置剂和高效洗油、驱油剂，以及施工工艺技术，并在矿场开展这种堵驱结合、以堵为主的提高采收率新技术试验，探索技术的风险性和经济有效性。f从已获得的试验结果表明：该技术对水驱开发至特高含水期的、存在特高渗透条带的高渗透油藏，采用调驱结合提高采收率技术能够经济有效地增加可采储量，提高原_油采砭辜，并且具有投资少、风险小，经济有效等优点歧关键词：堵驱结合?以堵为主；提高采收

3、率：PI决啾ABSTRACTThisthesisismainlyabouttosolvethefollowingproblems：duringthehighpercolationoilreservoirreachesitshighestwatercontentperiod．theoilreservoirproducesitssecondarymacropore，becauseoftheheterogeneity,enhancedinjectionandrecovery．Intheprocessofviscousc

4、ruderecoverybywaterdrive，thereasonssuchasviscosity,highoil／watermobilityratio，lowefficiencyofthewaterdrive，highoiYwaterinterfacetensionandlowefficientlyofthewaterdisplacementCanlowertheefficiencyofwaterdriverecoveryandtheremainingoilrecovery．Thetechniquetoeff

5、icientlyenhancerecoveryincludingtheeffectofthereasonsmentionedabovehasbeenstudiedinthisthesis．Accordingtoimprovingmacropore，alteringoil／watermobilityratioandloweringoil／waterinterfacetension，acomprehensivelyimprovingrecoverymethodhasbeenproposed．Itspurposeism

6、ainlytOincreasetheratioofrecoveryandenhanceoilrecoveryquantitythroughthecombinationofprofilecontrolandwaterplugging．Meanwhile，thesuitableprofilecontrolagent，oildisplacementprefloodandafter-pad．highefficientoildisplacementagentandtheengineeringprocessofthisper

7、iodwhentheoilreservoirreachesitshighestwatercontentarediscussedintermsofthemethodofPIdecision．Theexperimentinthisaspecthasbeencarriedoutonthespottoexaminetheriskandeconomicprofit．ThecollectedresultsindicatethatthemethodthatisproposedCanincreasethepetroleumrec

8、overyquantityandtheoilrecoveryratioforthehighpercolationoilreservoit,andithastheadvantagesoflessinvestment,lessriskandhi}gheconomicefficiency．Keywords：waterpluggingandprofilecontroloildis