潜江凹陷潜江组油气成藏期次及时间分析  

Hydrocarbon Accumulation Episodes and Time of Qianjiang Formation in Qianjiang Depression

作　　者：马丽娜[1] 叶加仁[1] 田杨[1] 王柯 

机构地区：[1]中国地质大学构造与油气资源教育部重点实验室,武汉430074 [2]中海油研究总院,北京100027

出　　处：《地质科技情报》2014年第1期144-149,共6页Geological Science and Technology Information

基　　金：国家自然科学基金项目(40172051);中国地质大学(武汉)构造与油气资源教育部重点实验室开放基金项目(TPR-2011-06)

摘　　要：基于圈闭形成时间法推测潜江凹陷潜江组油气藏形成的最早时间为上始新统潜二段沉积初期，利用烃源岩生排烃吏法分析潜江凹陷潜江组油气成藏的最早时间为晚始新世，应用流体包裹体资料揭示潜江凹陷潜江组共经历了晚始新世一早渐新世（37～32Ma）、早渐新世一中中新世（32-14Ma）及中上新世一现今（3～0Ma）共3期油气充注过程，并以第2期早渐新世一中中新世油气充注最为重要，且自蚌湖向斜带和潜北陡坡带至周矶向斜带再至斜坡带，油气充注时间有逐渐变晚的趋势。由此得出，综合应用流体包裹体法、圈闭形成时间法、烃源岩生排烃史法等多种方法可较为有效地确定具有复杂构造一沉积背景与演化历史的含油气盆地（凹陷）的油气．成藏期次与时间。The determination of hydrocarbon accumulation episodes and time has a fundamental significance for clearing accumulation mechanism, reconstructing the oil-gas accumulation dynamic process, and pro moting exploration process of Qianjiang Formaton in Qianjiang Depression. Based on the traps forming time method, the paper infered that the earliest formation time of petroleum reservoirs of Qianjiang Forma- tion in Qianjiang Depression is Late Eocene corresponding to the sedimentary period of the second member of Qianiiang Formation, and the earliest formation time of petroleum reservoirs is Late Eocene by hydro- carbon generation-expulsion history. Fluid inclusions data revealed that there are three episodes of hydro carbon charging, the first episode is Late Eocene-Early Oligocene （about 37--32 Ma）, the second one is Early Oligocene-Middle Miocene（about 32--14 Ma）, and the last one is Middle Pliocene （about 3--0 Ma）, furthermore, the second episode hydrocarbon charging in Early Oligocene-Middle Miocene is the most im- portant episode. The major filling time gradually delayed from the Banghu synclinal zone came, to Qianbei steep slope zone, to Zhouji synclinai zone, and to slope zone. As a result, multiple methods, such as com bination of fluid conclusions, traps forming time, and hydrocarbon generation-expulsion history, are effi cient measurement to determine the hydrocarbon accumulation episodes and time of petroliferous basin （de pression） which have complicate tectonic-sedimentary background and evolution history.

关 键 词：潜江凹陷 潜江组 流体包裹体 成藏期次 

分 类 号：P618.130.2[天文地球—矿床学]