低滲透油藏開發(fā)關(guān)鍵技術(shù)探討——以大港段六撥油田段南區(qū)塊為例.pdf

1、中國石油勘探開發(fā)研究院碩士學位論文低滲透油藏開發(fā)關(guān)鍵技術(shù)探討——以大港段六撥油田段南區(qū)塊為例姓名：李濤申請學位級別：碩士專業(yè)：油氣田開發(fā)工程指導教師：胡永樂周嘉璽20050515ABSTRACTDuannanblockofDuanliubooilfieldiSareservoirundereffectsofbothlithologyandstructureThereservoirrepresentedhi曲developmentdiff

2、icultybecauseofgeologicalcharacteristicsofcomplicatedstructure，diverselithologyhi曲heterogeneitylowpermeabilitypoorwaterinjectioneffectswithlargewellspacing；italsoshowedhighriskofmarginalbenefitTheexplorationofDuannanbloc

3、kbeganfrom1975，andtothedateofSep8m，1997totally17wellsweredrilledAmongthosewellsonly10gotindustrialoilTheaverageproductionof10wellsinitsfirstmonthwas163m3／d，butitdeclinedsharplytolessthan5m3／dabout1or2monthslateranditsave

4、ragecumulativeoilwasonlyabout3000tonsTeducethegreatrisk，theblockwasdecidedtodevelopbycooperationwithforeigncompanyWithcompliantresearchonkeytechnologythereservoirhasbeensuccessfullyputintoproduction，Thispapermainlystudie

5、skeytechnologyonlowpermeabilityreservoirWithstudyingofpressuresensitivityoflowpermeabilityzones，webeganwaterinjectionearlytopreventexcessivepressuredescendingandavoidexceptionalrapiddecliningofwellproductionsWechoosedrea

6、sonablewellspacingtoimprovedevelopmentandreducecostsbystudyingrelationsbetweenwellspacingandwaterfloodratio，productionrate，recoveryfactorandeconomicmarginWealsousedintegratedlayerprotectiontechnicduringcourseofdrillingan