准噶尔盆地南缘四棵树凹陷下组合油气成藏条件与评价  

Hydrocarbon Accumulation Conditions of the Lower Assemblage in Sikeshu Sag,the Southern Margin of Junggar Basin

作　　者：张健[1] 崔琴[1] 胡瀚文[2,3] 康月萍[1] 郭忠[1] 

机构地区：[1]中国石油新疆油田分公司勘探开发研究院地球物理研究所,新疆乌鲁木齐830013 [2]北京大学地球与空间科学学院,北京100871 [3]中国石油勘探开发研究院,北京100083

出　　处：《新疆地质》2016年第2期269-274,共6页Xinjiang Geology

基　　金：国家科技重大专项(2011ZX05003-005)资助

摘　　要：准噶尔盆地南缘四棵树凹陷下部成藏组合为白垩系吐谷鲁群及以下地层构成的多个储盖组合。该区发育3套烃源岩,资源量大,工作程度低。储集层发育较好,侏罗纪齐古组及白垩纪清水河组为优质储层。圈闭以构造类型为主,面积较大。断裂切割了烃源层及储层,侏罗—白垩系的不整合面为油气运聚的良好通道。油气成藏匹配关系较好。区域盖层分布广、厚度大,具良好勘探前景。凹陷中部褶皱带为油气勘探突破区,北东挠褶带为油气勘探评价区,山前断褶带及下盘隐伏构造带为油气勘探接替区。The lower assemblage refers to several reservoir-cap assemblages consisted of Tugulu Group of Lower Cretaceousand strata below in Sikeshu sag,the southern margin of Junggar basin.Three sets of source rocks develop in theseregions where stores abundant resources but is low degree exploration.The well-developed reservoirs here has high quality,such as the upper Jurassic Qigu Formation and the lower Cretaceous Qingshuihe Formation.Traps are mainly largestructural ones.Faults connecting source rocks with reservoirs and unconformity between Jurassic and Cretaceous providegood passages of hydrocarbon migration.In addition, huge thick cap-rocks mostly cover this region.In a word,thetime and space of hydrocarbon accumulation generally match with each other.And this region has favorable explorationprospect.The depression of the central fold belt is exploration breakthrough area of oil and gas.North east flexure belt isthe oil and gas exploration evaluation area. And the piedmont fault fold belt and the footwall of concealed structure beltare successions of oil and gas exploration.

关 键 词：四棵树凹陷 下部成藏组合 成藏条件 分析评价 

分 类 号：P618.13[天文地球—矿床学]