欢迎来到天天文库
浏览记录
ID:48010132
大小:2.38 MB
页数:10页
时间:2020-01-14
《四川盆地中南部寒武系地层划分对比与沉积演化特征.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、石油勘探与开发2012年12月PETRoLEUMEXPLORATIoNANDDEVEL0PMENTVl01
2、39NO.6681文章编号:1000.0747(2012)06.0681-10四川盆地中南部寒武系地层划分对比与沉积演化特征李伟,余华琪,邓鸿斌2(1.中国石油勘探开发研究院;2.中国石油西南油气田公司)基金项目:中国石油勘探开发研究院科技攻关项目“深部油气藏形成条件与重大选区研究”(2008KT-01)摘要:在层序地层学理论指导下,通过对大量单井及野外露头资料的分析,依据岩性、电性、古生物特征等,确定川中、川南寒武系各层组的对应关系,提出川中一JJ』南寒武系地层划分与对比的新
3、方案,并以此为基础,研究四川盆地中南部寒武纪不同时期的沉积相特征。研究表明,川南九老洞组基本对应川中的筇竹寺组,川南遇仙寺组基本对应川中沧浪铺组、龙王庙组、高台组,川南与Jl『中洗象池群基本对应。川中一川南寒武系自下而上分为筇竹寺组、沧浪铺组、龙王庙组、陡坡寺组和洗象池群,长期受加里东运动形成的古隆起控制和影响,经历了滨岸一陆棚、局限台地一蒸发坪一陆棚溻湖、局限台地等3个演化阶段。龙王庙组和洗象池群的砂屑白云岩、鲕粒白云岩、岩溶白云岩等是该区碳酸盐岩油气资源勘探的目标。图7表1参35关键词:四川盆地;寒武系;地层划分对比;沉积相;沉积演化中图分类号:TEl21.34文献标识码:ASt
4、ratigraphicdivisionandcorrelationandsedimentarycharacteristicsoftheCambrianincentra1.southernSichuanBasinLiWei,YuHuaqi,DengHongbin(1.PetroChinaResearchInstituteofPetroleumExploration&Development,Beijing100083,China;2.PetroChinaSouthwestOilandGasFieldCompany,Chengdu610051,China)Abstract:Underthe
5、guidanceofsequencestratigraphyandthroughanalysesoflargeamountsofwellandoutcropdata,thecOHespondenceofallformationsintheCambrianofsouthernandcentralSichuanBasinisdefinedandanewschemeofstratigraphicdivisionandcorrelationfortheCambrianincentral·southernSichuanBasinisproposedbasedonthecharacteristi
6、csoflithology,loggingcurvesandfossils.TheJiulaodongFormationinsouthemSichuanBasiniscorrespondingroughlytotheQiongzhusiFormationincentralSichuanBasin,theYuxiansiFormationinsouthernSichuanroughlytotheCanglangpu,LongwangmiaoandGaotaiformationsincentralSichuanBasin,theXixiangchiGroupinsouthernSichu
7、anroughlytothesamegroupincentralSichuan.TheCambrianincentral—southernSichuanBasinisdividedintotheQiongzhusiFormation,CanglangpuFormation,LongwangmiaoFormation,DouposiFormationandXixiangehiGroupfrombottomtotop.Onthebasisofthat,sedimentaryfaciesoftheCambrianwasstudied.Controlledandimpactedbythepa
8、leo-upliftsformedbyCaledonianOrogeny,thedepositionoftheCambrianexperiencedthreeevolutionarystages:shore-continentalshelf,restrictedplatform-evaporationfiat-shelflagoon,restrictedplatform.Thesandy,ooliticandcarstdolomitesintheLongw
此文档下载收益归作者所有