川西坳陷中部上三叠统马鞍塘组沉积相特征.doc

川西坳陷中部上三叠统马鞍塘组沉积相特征20123348OIL,GASGEOLOGY第卷第期年月:0253)9985(2012)04)0545)07文章编号川西坳陷中部上三叠统烃源岩动态演化模拟,,,江兴歌曾华盛朱建辉倩曹(,214151)中国石化石油勘探开发研究院无锡石油地质研究所江苏无锡:,,摘要川西坳陷中部上三叠统烃源岩在须家河组三段沉积时期开始成熟早侏罗世晚期进入高成熟阶段晚侏罗世达到过。,、。,成熟阶段川西坳陷西深东浅的构造格局导致烃源岩演化具有西早东晚西高东低的特点须家河组三段沉积末期成;,,1熟度相对较高的地区靠近龙门山前至须家河组五段沉积末成熟度相对高的地区向东扩展最高点向北迁至龙深井附。,。,、、近侏罗纪末成熟度相对较高的地区整体向东迁移白垩系末到现今形成以绵阳德阳彭州和大邑一线为核心的高83,1。1678125×10m。,—%,%,、%,%,%。晚侏罗世占白垩纪占:;;;;关键词动态演化盆地模拟烃源岩须家河组川西坳陷:TE112,3:A中图分类号文献标识码DynamcevouonsmuaonofheUppeasscsouceocsniltiiltitrTriirrkicentralpartofwesternSichuanDepressionJiangXingge,ZengHuashen,gZhuJianhuiandCaoQian(WuxiPetroleumGeologyResearchInstitute,SINOPECPEPRS,Wuxi,Jiangsu214151,China)Abstract:TheUpperTriassicsourcerocksinthecentralofwesternicShuanDepressiongotmatureurdingtherddepositionofthe3memberofXujiaheFormation,over-maturestaginthelateofEarlyJurassicandpost-matureintheLateJurassc,TheEW-dppngtectoncframeworkinwesterncShuandepressondetermnesthattheiiiiiiisourcerocksinthewestgotmatureearlierandhavehighermaturitythanthatintheeast,Areawithhighmaturi-rdtywasneartheiepdmontofLongmenMountainattheendofepdositionofthe3memberofXujiaheFormation,anditextendedeastwardsithwthehighestmaturitymigratingneartoLongshen-e1llwattheendofepdositionofththe5memberofXujiaheFormation,LateritmigratedeastwardsasahowleattheendoftJheurassic,TheareawithhighmaturityhascenteredinMianyang-Deyang-Pengzhou-DayufromtheCreataceousretosenpt,urrngatMashen-1ewandDayuNorth,,ThegasgeneratedurindgtherddepositionoftheMaantangFormation-%ofthetotal,,%%,%,%iliileywodsdynamcevouton,basnmodeng,sourcerock,uaheFormaton,westernSchuanDepressonKr:iliiliXjiiii)川西地区是碎屑岩领域非常重要的天然气生前陆盆地等盆西地区盆地发育演化受大陆边缘,1)5,,。,产基地上三叠统烃源岩是其主力烃源岩川地原型演化序列