苏门答腊弧后盆地特征及其油气勘探进展
Progress of Hydrocarbon Exploration and Characteristics of the Petroliferous Basin in the Sumatra Back-arc Area
周增园 1朱伟林 1彭文绪 2孙和风 2付晓伟 1赵世杰 1冯凯龙1
作者信息
- 1. 同济大学海洋地质国家重点实验室,上海 200092;同济大学海洋资源研究中心,上海 200092
- 2. 中国海洋石油国际有限公司,北京 100027
- 折叠
摘要
苏门答腊盆地群是东南亚典型的弧后盆地,也是印度尼西亚第一大油气富集区,近5年发现新增油气储量呈上升趋势,待发现资源量大,具有较大的勘探潜力.通过系统梳理苏门答腊盆地群油气勘探历史、主要油气资源分布和盆地构造演化特征,分析了苏门答腊弧后盆地油气分布差异性及其主控因素.油气的不均一分布格局,主要受控于断陷期烃源岩的差异性分布,断陷期的"三阶段"构造演化过程控制不同类型的沉积环境及沉积相分布,进而影响主力烃源岩的分布;其次,地壳拉张变薄以及岩浆作用促使弧后地区浅层形成较高热流值,加速烃源岩的热解生烃.结合苏门答腊弧后盆地群油气勘探历史及其待发现油气资源量,认为苏门答腊盆地北部AndamanⅢ PSC区块等深水区、南苏门答腊盆地源下基底潜山新层系以及中苏门答腊盆地的陆上低程度勘探地区是下一步研究的新领域.
Abstract
The Sumatera Basin Group is a typical back-arc basin in Southeast Asia and is the largest oil and gas enrichment area in Indonesia.In the past five years,it has been found that the new oil and gas reserves are on the rise,and the amount of resources to be discovered is large,which has great exploration potential.This study systematically sorts out the hydrocarbon exploration history,main oil and gas resource distribution,and basin tectonic evolution characteristics of the Sumatra Basin group and analyzes the differences in oil and gas distribution and its main controlling factors in the back-arc basin of Sumatra.The uneven distribution patterns of oil and gas were mainly controlled by the differential distribution of source rocks during the fault depression period.The three-stage tectonic evolution during the fault depression period controlled the distribution of sedimentary facies in different types of sedimentary environments,which in turn affected the distribution of the main source rocks.Secondly,crustal tension thinning and magmatism promoted the formation of high heat flow values in the shallow layer of the back-arc area,which accelerated the pyrolysis of the hydrocarbon source rocks.Combined with the oil and gas exploration history of the back-arc basin group in Sumatra and the amount of oil and gas resources to be discovered,it is considered that deep-water areas,such as the Andaman Ⅲ PSC block in the northern part of the Sumatra Basin,the new strata of the basement buried hill under the source of the South Sumatra Basin,and the low exploration degree areas on land in the Central Sumatra Basin are new areas for the next mature basin exploration.
关键词
东南亚/苏门答腊盆地/弧后盆地/油气勘探Key words
Southeast Asia/Sumatra Basin/Back-arc basin/Oil and gas exploration引用本文复制引用
基金项目
国家自然科学基金(92055203)
国家留学基金委(CSC)项目(202306260234)
出版年
2024
NETL
NSTL
万方数据