复杂叠合盆地油气动力场划分及其与勘探的关系——以塔西南坳陷为例  

Division of hydrocarbon dynamic field in complex superimposed basins and its relationship with exploration: a case study of southwest Tarim Depression

作　　者：孙耀玺 庞雄奇[1,2] 成湘 金玉洁 王雷[1,2] 陈君青 姜福杰[1,2] 熊飞 杨高喜[4] UN Yaoxi;PANG Xiongqi;CHENG Xiang;JIN Yujie;WANG Lei;CHEN Junqing;JIANG Fujie;XIONG Fei;YANG Gaoxi(State Key Laboratory of Petroleum Resources and Engineering,China University of Petroleum(Beijing),Beijing 102200,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102200,China;No.1 Oil Pruduction Plant,Changqing Oilfield Company,PetroChina,Yan′an 716000,China;Ground Emergency Repair Center,Zhongyuan Oilfield Company,SINOPEC,Puyang 457001,China)

机构地区：[1]中国石油大学(北京)油气资源与工程国家重点实验室,北京102200 [2]中国石油大学(北京)地球科学学院,北京102200 [3]中国石油长庆油田分公司第一采油厂,陕西延安716000 [4]中国石化中原油田分公司地面工程抢维修中心,河南濮阳457001

出　　处：《断块油气田》2025年第2期185-192,共8页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金联合基金课题“塔里木、鄂尔多斯、四川盆地深层碳酸盐岩流体动力场划分与成藏动力”(U19B6003-02-04-02)。

摘　　要：塔西南坳陷构造复杂,对油气藏分布规律认识不清,油气成藏动力边界和油气藏类型不明,严重制约了油气藏高效勘探开发。文中以150余口井的岩心分析、高压压汞测试、镜质组反射率分析、岩电实验及测井解释等资料为基础,利用统计分析法、最小流动孔喉半径法、束缚水饱和度法等方法,对油气藏类型进行了划分,并指出下步油气勘探思路。结果表明:1)塔西南坳陷主要发育4类油气藏,即常规油气藏、非常规油气藏、裂缝油气藏和地层不整合油气藏。2)浮力成藏下限对应埋深为4000 m、孔隙度为9.04%、镜质组反射率为0.62%;油气成藏底限对应埋深为9225~9785 m、临界孔喉半径为0.01μm、孔隙度为1.11%~1.36%。3)当埋深小于4000 m时,油气勘探应集中于圈闭构造高点;当埋深在4000~9225 m时,油气勘探应集中于斜坡等“甜点区”;当埋深大于9225 m时,油气勘探风险较大,须谨慎开采。研究结果可为塔西南坳陷油气勘探开发提供重要参考。The structure of southwest Tarim Depression is complicated,the distribution law of oil and gas reservoirs is not clearly understood,and the dynamic boundary of hydrocarbon accumulation and type of oil and gas reservoir are not clear,which have seriously restricted the efficient exploration and development of oil and gas reservoirs.Based on core analysis,high pressure mercury injection test,vitrinite reflectance analysis,rock electricity experiment and logging interpretation data of more than 150 wells,this paper uses statistical analysis,minimum flow pore throat radius method,bound water saturation method and other methods to divide the types of oil and gas reservoirs,and points out the next step of oil and gas exploration.The results show that:1)Four types of oil and gas reservoirs are mainly developed in southwest Tarim Depression,namely,conventional oil and gas reservoirs,unconventional oil and gas reservoirs,fractured oil and gas reservoirs and stratigraphic unconformity oil and gas reservoirs.2)The lower limit of buoyancy accumulation corresponds to 4000 m burial depth,9.04%porosity and 0.62%vitrinite reflectance;the lower limit of hydrocarbon accumulation corresponds to 9 225-9 785 m burial depth, 0.01 μm critical pore throat radius and 1.11%-1.36% porosity. 3) When the burial depth is less than 4 000 m, the oil and gas exploration should focus on the high point of the trap structure;when the buried depth is 4 000-9 225 m, the oil and gas exploration should be concentrated on the "sweet spots" such as slopes;when the burial depth is greater than 9 225 m, the oil and gas exploration risk is relatively high and careful exploitation is required. The research results can provide important reference for the oil and gas exploration and development in southwest Tarim Depression.

关 键 词：浮力成藏下限 油气成藏底限 油气动力场划分 埋深 塔西南坳陷 

分 类 号：TE121[石油与天然气工程—油气勘探]