安达曼海丹老盆地油气地质特征及勘探潜力分析  

Analysis of Hydrocarbon Geological Characters and Exploration Potential in Mergui Basin,Andaman Sea

作　　者：陈建宏 栾锡武[2,3] 魏新元 叶传红 何明勇 CHEN Jian-hong;LUAN Xi-wu;WEI Xin-yuan;YE Chuan-hong;HE Ming-yong(College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China;Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China;Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China;College of Marine Geosciences, Ocean University of China, Qingdao 266100, China)

机构地区：[1]山东科技大学地球科学与工程学院,青岛266590 [2]中国地质调查局青岛海洋地质研究所,青岛266071 [3]青岛海洋科学与技术试点国家实验室,海洋矿产资源评价与探测技术功能实验室,青岛266237 [4]中国海洋大学海洋地球科学学院,青岛266100

出　　处：《科学技术与工程》2022年第13期5154-5162,共9页Science Technology and Engineering

基　　金：中国东盟海洋地震数据平台与研究中心建设项目(12120100500017001);国家自然科学基金(92055211)。

摘　　要：近年来,在安达曼海陆续发现多个大中型油气田及含油气构造,因此安达曼海成为东南亚油气勘探的热点地区之一。丹老盆地属于安达曼海的一个次级盆地,其构造演化、油气地质特征和勘探潜力整体研究程度较低。为指导丹老盆地油气勘探,从研究区域地质背景和构造演化出发,系统研究了该区域构造-沉积演化和盆地油气地质特征,并与北苏门答腊盆地进行比较,建立了油气成藏模式,分析了其勘探潜力。研究结果表明:区域构造-沉积演化可划分为前裂谷期、断陷期、裂陷期和弧后走滑拉分期4个时期;丹老盆地主要烃源岩为也拉组海相页岩,主要储层为拉廊组河流-三角洲相砂岩,断裂和不整合面是油气运移的有利通道,圈闭类型包括构造圈闭和岩性圈闭,可能的成藏模式包括下生-上储-背斜式、下生-上储-断块式和下生-上储-生物礁滩体;盆地南部的中深层层系以及碳酸盐岩建隆是丹老盆地未来寻找油气的有利目标。In recent years,several oil and gas fields as well as several hydrocarbon structures were discovered in Andaman Sea,thus,Andaman Sea has become a hot spot of hydrocarbon exploration in SE Asia.The Mergui Basin belongs to a sub-basin of Andaman Sea,and its tectonic evolution,hydrocarbon geological conditions and exploration potential remain low.In order to provide guidelines for hydrocarbon exploration in the Mergui Basin,starting from the regional geological background and structural evolution,the regional tectonic sedimentary evolution and oil and gas geological characteristics of the basin were systematically studied.Compared with the North Sumatra Basin,the oil and gas accumulation model was established,and its exploration potential was analyzed.The results show that the tectonic-sedimentary evolution of the region can be divided into four period,which are pre-rift,rifting,structural sag and back-arc strike-transtension.The main source rock of the basin is marine shales of Yela Formation,and the main reservoir is the fluvial-deltaic sandstones of Lalang Formation,while the faults and the unconformities are the favorable migration pathways,trap types including structural traps and lithological traps.The possible hydrocarbon accumulation model of the Mergui Basin including gas migrated vertically and accumulated within anticlines,gas migrated vertically and accumulated within fault-blocks,gas migrated vertically and accumulated within carbonate reefs.The southern middle-deep strata of the Mergui Basin and carbonate build-ups are the ideal targets for hydrocarbon exploration in the future.

关 键 词：安达曼海 丹老盆地 构造演化 油气特征 勘探潜力 

分 类 号：P67[天文地球—海洋地质]