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ID:37412007
大小:2.58 MB
页数:12页
时间:2019-05-23
《东营凹陷博兴洼陷石油生成、运移和聚集史数值模拟》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、学兔兔www.xuetutu.com曲-5天然气地第33卷第5期OIL&GASGEOLOGY2012年10月文章编号:0253—9985(2012)05—0675—11东营凹陷博兴/\洼,士陷石油生成、运移和聚集史数值模拟王冰洁,罗胜元,陈艳红,吴旺林(1.中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074;2.中国石油新疆油田分公司采油二厂,新疆克拉玛依834008;3.中国石油华北油田公司二连分公司,内蒙古锡林浩特026000)摘要:渤海湾盆地东营凹陷博兴洼陷烃源岩为沙河街组三段中、下亚段和沙河街组四段上亚段
2、暗色泥岩,原油探明地质储量主要集中在沙三段和沙四段砂岩储层中。在恢复东营凹陷博兴洼陷热史的基础上,对烃源岩段成熟史、生排烃史和油气聚集史特征进行了模拟。结果表明:①至少存在两期原油的生、排烃过程,第一期为30~25Ma,第二期为16~0Ma,特别是距今5Ma(馆陶组沉积末期)以来,石油大量生成并排出形成现今的油气分布格局,而现今主力烃源岩段仍处于大量生油阶段;②沙四段原油的生成量和聚集量都明显大于沙三段,说明主力烃源岩段的生、排烃特征对原油纵向分布具有一定控制作用;③在沙三中、下亚段和沙四上亚段共划出7个距离源区较近的有利油气
3、聚集区,而缓坡带虽处于油气低势区,有利于油气的聚集,但烃源岩成熟度低,并且来自于洼陷区的原油受博兴断裂带阻隔,导致博兴缓坡带油气聚集量小。关键词:数值模拟;石油生~运一聚史;沙河街组;东营凹陷;济阳坳陷中图分类号:TEl22.3文献标识码:ANumericalsimulationofhydrocarbongeneration,migrationandaccumulationintheBoxingsag,DongyingDepression,JiyangSubbasinWangBingjie,LuoShengyuan,ChenY
4、anhongandWuWanglin。(1.KeyLaboratoryofTectonicsandPetroleumResourcesofMinistryofEducation,ChinaUniversityofGeoscienees,Wuhan,Hubei430074,China;2.No.2OilProductionPlant,PetroChinaXinjiangOilfieldCompany,Karamay,Xinjiang834008,China;3.ErlianSubsidiaryCompany,Petrochina
5、HuabeiOilfieldCompany,Xilinhaote,InnerMongolia026000,China)Abstract:ThedarkshalerichinorganicmatterinthemiddleandlowerpartsofMember3(Es)andtheupperpartofMember4(Es)oftheShah@eFormationarethesourcerocksintheBoxingsagoftheDongyingdepres—sion.Themeasuredgeologicreserve
6、saremainlydiscoveredinthesandstonesoftheEsandEs.Basedonare.constructionofthermalhistoryofthesag,theresearcherssimulatedthesourcerockthermalmaturationhistoryandhydrocarbongeneration,migrationandaccumulationhistories.Thefindingsarelistedasthefollowing:@Thereareatleast
7、twoperiodsofhydrocarbongenerationandexpulsionwiththefirstperiodlastingfrom30Mato25Maandthesecondrangingfrom16Mato0Ma.ofthesecondperiod,themostimportanttimeisfrom5Ma(theendofdepositionoftheGuantaoFormation)tothepresent,duringwhichlargeamountofoilweregeneratedanddistr
8、ibutedthewayweseetoday,andthemajorsourcerocksaresupposedtobestillgeneratingoilatpre—sent;②TheamountofoilgeneratedandaccumulatedintheEsmemb
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