海相油气地质Issue(1)：52-60,9.DOI:10.3969/j.issn.1672-9854.2016.01.008
孟加拉湾若开海域晚新生代构造变形及其对油气的控制作用
Late Cenozoic Deformation of Arakan Fold Belt and Its Control on Hydrocarbon Accumulation in Offshore Rahkine, Bay of Bengal
摘要
Abstract
Based on recent drilling and 2D/3D seismic data, the late Cenozoic deformation of Arakan fold belt and its control on hydrocarbon accumulation was investigated in offshore Rahkine, Bay of Bengal. The analysis result shows that only a basal detachment fault (10km of burial depth) develops in the southern part of the study area while a basal detachment fault (12km deep buried) and a middle detachment fault (4km deep) develop in the northern part. Under the control of these detachment faults, one set of tectonic layers develops in the southern part and two sets of layers (the upper and the lower one) in the northern part, respectively. The lateral extended distance, the wave length and the interval distance between anticlines are longer obviously in the southern part than those in the northern part. In addition, both the NS-trending anticline and the secondary NE-trending transtensional dextral strike-slip fault formed in the up-per tectonic layer in northern part. According to growth strata records, these deformations formed in late Quaternary and at the end of late Quaternary respectively. Trap formation, hydrocarbon migration and accumulation conditions are greatly controlled by the late Cenozoic deformation. It is suggested that the structural-lithologic composite traps have the condition to form large gas fields in the gentle fold belt and the southern part of the study area is the favorable ex-ploration targets in the future.关键词
孟加拉湾/若开褶皱带/晚新生代/构造特征/油气聚集Key words
Late Cenozoic/Structural characteristics/Hydrocarbon accumulation/Arakan fold belt/Bay of Bengal分类
能源科技引用本文复制引用
唐鹏程,邵大力,王海强,王红平,孙辉,张勇刚,马宏霞,丁梁波..孟加拉湾若开海域晚新生代构造变形及其对油气的控制作用[J].海相油气地质,2016,(1):52-60,9.基金项目
本文受中国石油天然气集团公司科学研究与技术开发项目“海外重点战略大区勘探技术研究与实践”子课题《海外海洋勘探技术与有利目标评价研究》(编号2014D-0908)资助 （编号2014D-0908）
