摘要
利用研究区最新的地震和钻井等基础资料,对东非鲁伍马盆地已发现气藏的成藏条件及成藏控制因素进行了分析研究。结果表明,鲁伍马盆地具有良好的油气成藏条件,研究区内烃源岩为裂谷期发育的二叠系—三叠系、侏罗系和白垩系的泥页岩,储层为古近系浊积砂岩,盖层为古近系发育的几套分布广泛的海相泥岩。分析认为构造活动控制了研究区的油气成藏,良好的盖层条件是油气成藏和保存的关键因素。指出构造相对稳定区,特别是受晚期伸展构造影响较弱的陆坡区是优先勘探的方向,区块优选应尽量避开通天断裂发育的区域,同时需要重点对区域盖层条件进行评价。
Based on the latest seismic and drilling data,the formation conditions of gas reservoir and the controlling factors of gas accumulation of the Rovuma Basin in East Africa have been analyzed.The results show that the Rovuma Basin has excellent conditions for hydrocarbon accumulation.In the study area,the source rock is mud shale of Permian-Triassic,Jurassic and Cretaceous which developed in the rift period,and the reservoir is the Paleogene turbidite sand,and the regional caprock has several sets of the marine mudstone widely distributed in Paleogene.It is concluded that the tectonic activities controlled the oil and gas accumulation in this area,and good caprock conditions are the key factor for hydrocarbon accumulation and preservation.It is pointed out that the relatively stable area,especially the continental slope area with weak tectonic deformation during the latest extensional deformation is a priority exploration region,and the optimal selection of exploration block should avoid the area with large scale faults that extend to sea floor,and the regional caprock conditions should be evaluated emphatically.
作者
曹全斌
唐鹏程
吕福亮
范国章
邵大力
鲁银涛
许小勇
陈宇航
CAO Quanbin;TANG Pengcheng;Lü Fuliang;FAN Guozhang;SHAO Dali;LU Yintao;XU Xiaoyong;CHEN Yuhang
出处
《海相油气地质》
CSCD
北大核心
2018年第3期65-72,共8页
Marine Origin Petroleum Geology
基金
国家科技重大专项"南海中建海域深水油气地质条件及目标评价"(编号:2017ZX05026006)
中国石油天然气集团公司科技项目"海外海域油气地质条件与关键评价技术研究"(编号:2016D-4303)
青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室2017年度开放基金项目"东非鲁伍马盆地深水重力流沉积演化及‘源-汇’过程研究"(编号:MGQNLM-KF201716)联合资助
关键词
东非
鲁伍马盆地
深水
浊积砂岩
气藏
成藏条件
deep water
turbidite sand
gas reservoir
accumulation conditions
Rovuma Basin
East Africa
作者简介
曹全斌:1975年生,硕士,高级工程师,从事地球物理勘探及深水沉积学研究工作。通信地址:310023浙江省杭州市西湖区西溪路920号;E-mail:caoqb_hz@petrochina.com.cn。
