摘要
孤北洼陷西部沙三段主要发育扇三角洲、滑塌浊积扇、近岸水下扇和深湖-半深湖体系。近岸水下扇和扇三角洲沉积体系的发育都具继承性和阶段性。该区油气成藏主要受沉积控制,半深湖-深湖环境形成良好的成熟烃源岩,各类沉积体系形成了十分发育的储集层,且生储盖组合类型优越,受沉积控制的岩性圈闭为主要圈闭类型,其次是断层遮挡圈闭。油气运移距离短,骨架砂体输导条件好,运聚模式单一,岩性油气藏应为主要勘探目标。
The Sha-3 member （Es3） in western Gubei sub-sag in Bohai Bay basin mainly develops fan delta, slump turbidite fan, inshore underwater fan and lacustrine sedimentary systems. The development of fan delta and inshore underwater fan are of successive and stage nature, and these fans develop in weakening trend. The hydrocarbon accumulation in this area is mainly controlled by sedimentary system. The mature source rocks were formed in the lacustrine environment, and reservoirs with good source-reservoir-cap rock assemblage are commonly found in each type of sedimentary system. The lithologic trap controlled by sedimentary system is main type of traps, followed by fault-screened trap. Also, it is recognized that the short distance of petroleum migration, good transport condition of matrix sand body and single petroleum migration and accumulation modes should make the lithologic reservoir become the main target for petroleum exploration in this area.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2012年第5期520-522,共3页
Xinjiang Petroleum Geology
关键词
济阳坳陷
孤北洼陷
沉积体系
扇三角洲
滑塌浊积扇
油气聚集
Jiyang depression： Gubei sub-sag
depositional system
fan delta
slump turbidite fan
oil-gas accumulation
