塔里木盆地于奇地区奥陶系碳酸盐岩成藏条件及成藏模式  

Petroleum accumulation in Ordovician carbonate rocks of Yuqi region in Akekule uplift,Tarim Basin

作　　者：旷理雄[1] 郭建华[1] 黄太柱[2] 肖秋苟[3] 

机构地区：[1]中南大学地学与环境工程学院 [2]中国石化西北分公司研究院 [3]中国石化中南分公司研究院

出　　处：《石油勘探与开发》2007年第3期299-303,322,共6页Petroleum Exploration and Development

基　　金：中国石化股份有限公司科技项目"塔里木盆地于奇地区油气成藏特征及目标评价研究"(P05009)

摘　　要：塔里木盆地阿克库勒凸起北部于奇地区是塔河油区外围重要的油气勘探区。以成盆、成烃和成藏理论为指导,应用盆地分析、储集层预测、荧光薄片及流体包裹体分析等技术和方法,综合研究分析了于奇地区中、下奥陶统鹰山组(O1+2y)碳酸盐岩油气成藏条件,建立了油气成藏演化模式。研究结果表明,区内油源主要来自阿克库勒凸起南部寒武系—下奥陶统烃源岩,油源充足,资源潜力较大;O1+2y储集层类型为洞穴型、裂缝-孔洞复合型和裂缝型,储集层物性中等,最有利的储集层分布区位于YQ3井—S104井一带,盖层的区域封盖和直接封盖能力较好,但海西晚期构造运动对本区油气保存影响最大。于奇地区至少有4个油气注入成藏期,其中最重要的油气注入期为海西晚期和喜马拉雅期;成藏模式为自烃源区侧向排烃、多期成藏,其演化经历了4个阶段。The Yuqi Block is an important oil and gas exploration play in the Akekule uplift. The hydrocarbon accumulating conditions in the Yingshan Formation are studied and the accumulation model is established using the techniques of basin analysis, reservoir prediction, fluorescence thin section and fluid inclusion. The oil and gas in the Yuqi Block come from the Cambrian to Lower Ordovician source rocks in the southern Akekule uplift. Yingshan Formation reservoirs are of cave, fracture-pore and fracture types, and their physical properties are intermediate. The seal conditions of Lower Carboniferous mudstones are fair, but the late Hercynian structural event is the most important influence element on petroleum preservation. There are at least four oil/ gas charges in the Yingshan Formation, and the most important charge periods are Late Hercynian and Himalayan （Cenozoic）. The accumulation model is lateral expulsion of hydrocarbon and multistage accumulation, and the evolution has four stages.

关 键 词：奥陶系碳酸盐岩 油气成藏 荧光薄片 流体包裹体 成藏模式 阿克库勒凸起 塔里木盆地北部 

分 类 号：TE122.3[石油与天然气工程—油气勘探]