摘要
利用钻井、测井及地震资料,重建了南沙海域南部第三纪三角洲沉积的时空演化,并讨论了主控因素。研究表明,自晚渐新世—上新世,研究区三角洲在平行岸线方向(NE—SW)自西向东从西巴兰断层西侧向东侧迁移;在垂直岸线方向(NW—SE)则整体表现出从陆向海进积推进。这一演化过程主要受控于古南海自西向东"剪刀式"俯冲引起的造山带的迁移和海平面的升降。并且发现研究区烃源岩、储层和圈闭具有分期、分带特征。通过综合分析,在研究区划分出3个与三角洲有关的油气聚集区,即曾母盆地巴林坚三角洲油气聚集区、文莱—沙巴盆地巴兰三角洲油气聚集区、梅丽干—冠军三角洲油气聚集区。
Based on seismic sections, drilling data and logging profiles, the spatial-temporal evolution of the deltas that developing in southern Nansha area during Tertiary sedimentation is reconstructed and the dominating factors controlling development of each delta are discussed. It is indicated that the deltas migrated from the west side of the west Baram fault to the east side of the west Baram fault along the coastline(NE—SW) while they advanced with progradation from the land to the sea in the longitudal direction(NW—SE) during Oligocene and Pliocene. Such an evolution process is controlled by eustacy and the migration of orogenic belts which is caused from the scissors-typed subduction of the ancient South China Sea. Source rock, reservoirs and traps can be divided into different stages and zones. By synthetic analysis, three zones of hydrocarbon accumulation relative with the evolution of the deltas are divided: the Balingian delta oil-rich zone in Zengmu Basin, the Baram delta oil-rich zone and the Meligan-Champion delta oil-rich zone in Brunei-Sabah Basin.
出处
《海相油气地质》
CSCD
北大核心
2016年第4期21-33,共13页
Marine Origin Petroleum Geology
基金
国家科技重大科技专项“大型油气田及煤层气开发”的子课题“南沙海域大中型油气田成藏规律”(编号:2011ZX05025-005-03)资助
关键词
南沙海域
曾母盆地
文莱-沙巴盆地
三角洲沉积
沉积演化
油气聚集
Delta sediments
Sediment evolution
Hydrocarbon accumulation
Zengmu Basin
Brunei-Sabah Basin
Nansha waters