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1、第33卷第6期石油實驗地質(zhì)Vol.33,No.62011年12月PETROLEUMGEOLOGY&EXPERIMENTDec.,2011文章編號:1001-6112(2011)06-0592-05鄂爾多斯盆地南部鎮(zhèn)涇地區(qū)典型油藏動態(tài)解剖及成藏過程恢復尹偉1,胡宗全1,李松1,劉震2,商曉飛3,張華照4(1.中國石油化工股份有限公司石油勘探開發(fā)研究院,北京100083;2.中國石油大學(北京),北京102249;3.山東科技大學,山東青島266510;4.中國石油長城鉆探工程公司HSE監(jiān)督中心,北京100101)摘要:利用孔隙演
2、化史恢復、生烴史熱模擬和流體包裹體分析等技術對鄂爾多斯盆地南部鎮(zhèn)涇地區(qū)典型油藏進行了動態(tài)解剖。分析結(jié)果表明,研究區(qū)長8巖性圈閉形成時間為晚侏羅世以來(160Ma);長7主力烴源巖初始生烴時間為侏羅紀末(140Ma),大規(guī)模生烴時間為早白堊世末期(100Ma);長8油藏為兩期成藏,成藏時間分別為早白堊世中期(130Ma)和晚白堊世早期(90Ma);圈閉形成期、主力生烴期和關鍵成藏期時間配置關系好,有利于長8油藏的形成。結(jié)合構造演化,恢復油氣充注成藏過程,建立了油氣成藏動態(tài)演化模式,即“多期成藏、中期為主、晚期調(diào)整定型”。關鍵詞:
3、生烴史;成藏期次;成藏過程;動態(tài)成藏模式;鎮(zhèn)涇地區(qū);鄂爾多斯盆地南部中圖分類號:TE122.3文獻標識碼:ADynamicanalysisandaccumulationprocessrecoveryoftypicalreservoirsinZhenjingregion,southofOrdosBasin1,HuZongquan1,LiSong1,LiuZhen2,ShangXiaofei3,ZhangHuazhao4YinWei(1.SINOPECExploration&ProductionResearchInstitute,
4、Beijing100083,China;2.ChinaUniversityofPetroleum,Beijing102249,China;3.ShandongUniversityofScienceandTechnology,Qingdao,Shandong266510,China;4.HSESupervisionCenter,GreatWallDrillingCompany,PetroChina,Beijing100101,China)Abstract:Thedynamicanalysesoftypicalreservoirs
5、inZhenjingregionofthesouthernOrdosBasinhavebeencarriedoutbasedonporeevolutionhistoryrecovery,petroleumgenerationhistorythermalsimula-tionandfluidinclusionanalyses.TheChang8lithologictrapswereformedsincethelateJurassic(160Ma).TheChang7sourcerocksbegantogeneratepetrol
6、eumattheendofJurassic(140Ma)andachievedthepeakattheendofearlyCretaceous(100Ma).TheChang8reservoirswereformedduring2stages,includingthemediumofearlyCretaceous(130Ma)andthebeginningoflateCretaceous(90Ma).Thetimesfortrapformation,petroleumgenerationandreservoirformatio
7、nmatchedwell,whichwasfavorablefortheformationofChang8reservoirs.Thechargingandaccumulationprocessesofpetroleumwererecoveredaccordingtothestudiesoftectonicevolution.Adynamicevolutionmodelillustratingtheprocessofreservoirformationwasmade,characterizedby“multiplestages
8、ofaccumula-tion,mainlyformedduringthemiddlestageandlatestageadjustment”.Keywords:hydrocarbongenerationhistory;accumulationstage;accumulati