欢迎来到天天文库
浏览记录
ID:53031510
大小:1.78 MB
页数:6页
时间:2020-04-14
《庙西凹陷中南洼烃源岩评价及其勘探启示-论文.pdf》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、第35卷第1期洛石、,o1.35NO.12015年3月OFFSHOREOILMar.2015文章编号:1008.2336(2015)01.0052.06庙西凹陷中南洼烃源岩评价及其勘探启示张宏国,官大勇,宿雯,王广源,麻旭刚(中海石油(中国)有限公司天津分公司渤海油田研究院,天津300452)摘要:渤海边缘洼陷整体勘探程度较低,烃源岩生、排烃能力分析是研究重点。为明确庙西凹陷中南洼地区油气富集规律,从烃源岩分析和油源对比入手,明确低熟油优势运移通道类型,进而预测油气富集层位与区带。研究表明,中南洼地区发育巨厚沙三段,其有机质母质类型以混源为主,沉积水体为半成水一咸水环境,现
2、处于低熟阶段,为蓬莱25.6油田主要油源,证明其为研究区主力生烃层系。烃源岩热演化与排烃强度分析表明庙西凹陷中南洼烃源岩热演化程度较低,而低熟油初次运移动力较弱,因此单一型的油气二次运移通道运移量高于复合型通道,沿断层近距离运移馆陶组就近成藏几率较大。研究区中部走滑带断层活动性强且深切油源,主干走滑和其派生断层形成背斜形态圈闭,具有良好的勘探潜力。关键词:庙西凹陷中南洼;烃源岩评价;低熟油;运移通道;走滑断层中图分类号:TEl22.2文献标识码:ADOI:10.3969~.issn.1008.2336.2015.01.052EvaluationonSourceRocksin
3、MiaoxiMiddle-SouthernSagandItsAspirationtoExplorationZHANGHongguo,GUANDayong,SUWen,WANGGuangyuan,MAXugang(ResearchInstituteofBohaiOilfield,TianjinBranchofCNOOCLtd.,Tianjin300452,China)Abstract:TheexplorationdegreeonmarginalsagsinBohaiSeaislOW,andtheexplorationkeyistostudythehydrocarbongen-
4、erationandexpulsioncapabilityofsourcerocks.InordertomakeclearaboutthehydrocarbonaccumulationregularityinMiaoximiddle—southernsag,analysisofgeochemicalcharacteristicofsourcerockandoil—sourcecorrelationhavebeenconducted,andtheadvantagehydrocarbonmigrationpathwaysforlowmatureoilshavebeenmadec
5、lear.Inaddition,thehydrocarbonrichtargetseriesandzoneshavebeenforecasted.ThestudyresultsindicatedthatSha·3MemberisthickandwelldevelopedinMiaoximiddle-south—emsag,theorganicmattermatrixtypeofsourcerockaremainlymixedtype,depositedinbrackishwaterandsaltywaterenviron—ments,beingmainoilsourcesf
6、orPenglai25—6oilfieldwithlowmatureoil.IthasbeenprovedthatSha-3Memberisthemainhydro—carbongenerationseriesforthestudyarea.TheanalyzingresultsaboutthermalevolutionofsourcerockandhydrocarbonexpulsionintensityindicatedthatthethermalevolutiondegreeofsourcerockislowinMiaoximiddle-southernsag,and
7、thedrivingforceforprimaryhydrocarbonmigrationislow.Therefore,theamountofhydrocarbonmigratedthroughsingletypeofsecondarypathwayishigherthanthatthroughcompoundpathway,andthechanceofhydrocarbonaccumulationinGuantaoformationthroughshortdis—tancemigrationbyfaultswa
此文档下载收益归作者所有