印尼库泰盆地海陆油气富集差异主控因素  

The major control factors of hydrocarbon differential accumulation between onshore and offshore of Indonesia Kutai Basin

作　　者：李进波 宗奕 LI Jinbo;ZONG Yi(CNOOC Iraq Limited,Beijing 100028,China;CNOOC International Limited,Beijing 100028,China)

机构地区：[1]中国海洋石油伊拉克有限公司,北京100028 [2]中国海洋石油国际有限公司,北京100028

出　　处：《石油化工应用》2022年第3期81-86,共6页Petrochemical Industry Application

基　　金：国家重大专项,项目编号:2011ZX05028。

摘　　要：印尼第二大含油气盆地库泰盆地海上部分和陆上部分油气富集存在明显的差异,搞清油气富集差异的原因及主控因素对该区域勘探方向和有利区块筛选具有重要意义。本文从库泰盆地海上和陆上已发现油气资源量及其分布出发,通过对构造和沉积演化、烃源岩特征、砂体分布、断层系统和油气成藏模式的系统分析,找出该区域油气成藏的主控因素为烃源岩和断层系统。研究结果表明,库泰盆地海上部分的烃源岩为中中新统煤系烃源岩,为优质烃源岩;陆上部分烃源岩为始新统湖相烃源岩,为中-差烃源岩;烃源岩的性质和分布决定了库泰盆地海上和陆上的油气田规模差异。库泰盆地主要发育反转构造系统、正断层系统和挤压构造系统三套断层系统,不同的断层系统控制了盆地的时空油气藏分布差异。反转构造系统控制中中新统油气藏的分布,正断层系统控制上中新统油气藏分布,挤压构造系统控制上新统油气藏分布。In Kutai Basin,the second largest petrol basin in Indonesia,there are obvious differences in oil and gas enrichment between offshore and onshore parts.It is of great significance to find out the causes and main controlling factors of the differences in oil and gas enrichment for the exploration direction and the selection of favorable blocks in this area.Based on the amount and distribution of oil and gas resources discovered on the sea and land in Kutai Basin,this paper systematically analyzes the structural and sedimentary evolution,source rock characteristics,sand body distribution,fault system and hydrocarbon accumulation mode,and finds out that the main controlling factors of hydrocarbon accumulation in this area are source rock and fault system.The results show that the source rocks in the offshore part of Kutai Basin are Miocene coal-bearing source rocks with high quality.Source rocks in the onshore are Eocene lacustrine source rocks with medium poor source rocks.The nature and distribution of source rocks determine the scale difference of offshore and onshore oil and gas fields in Kutai Basin.There are three fault systems in Kutai Basin,which are inversion structure system,normal fault system and compression structure system.Different fault systems control the spatial and temporal distribution of oil and gas reservoirs.The inversion structure system controls the distribution of Miocene reservoirs,the normal fault system controls the distribution of Upper Miocene reservoirs,and the compression structure system controls the distribution of Pliocene reservoirs.

关 键 词：库泰盆地 烃源岩 断层 主控因素 成藏差异 

分 类 号：TE112[石油与天然气工程—油气勘探]