摘要
南海北部莺-琼盆地油气勘探活动已经历了30余年,勘探发现的油气田主要以构造型油气藏为主。随着勘探程度的加深,寻找非构造的隐蔽圈闭油气藏以改变莺-琼盆地油气勘探的被动局面显得日益重要。根据油气勘探工作需要将莺-琼盆地隐蔽圈闭划分为低位盆底扇型圈闭、砂岩上倾尖灭型圈闭、浊积砂岩型圈闭、地层超覆型圈闭、古水道型圈闭、三角洲前缘砂体型圈闭。南海北部莺-琼盆地具备形成隐蔽圈闭油气藏的有利条件:莺-琼盆地有丰富的烃源基础;在历史时期内水平面的频繁变化,使得岩性带在纵横向上都发生交织变化而产生岩性油气藏,尤以在盆地低水位期形成的盆底扇、斜坡扇等低位扇为主;另外历史时期构造活动频繁,而形成多个构造面和构造不整合面,与之相适应地产生了多种地层不整合油气藏等。
Oil and gas exploration activities in the Yinggehai and Qiongdongnan Basins of northern South China Sea have lasted for more than 30 years. The oil and gas fields found there are mainly belong to struc- tural type of hydrocarbon reservoir. To meet the needs in exploration, it is required to look for non-struc- tural subtle trap of oil and gas reservoirs. The Yinggehai and Qiongdongnan Basins of the northern South China Sea have favorable conditions for the formation of subtle traps, there are plenty of hydrocabon source in the Yinggehai and Qiongdongnan Basins and frequent sea level changes in history. Shifting of li- thological belts helps the formation of lithologic reservoirs. The basin bottom and slope fan systems formed as part of the low-stand system tract in the low-water level period are well developed. In addition, there are frequent tectonic activities in history, which are favorable for the formation of stratigraphic-un- conformity traps.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2014年第2期111-120,共10页
Marine Geology & Quaternary Geology
基金
国家科技重大专项(2008ZX05013-005)
关键词
构造型油气藏
隐蔽圈闭
岩性油气藏
地层不整合油气藏
莺琼盆地
structural type of hydrocarbon reservoirs
conformity traps
Yinggehai and Qiongdongnan basinsubtle trap
lithologic reservoirs
stratigraphic-un
