石油实验地质2018，Vol.40Issue(3)：330-336,7.DOI:10.11781/sysydz201803330
北部湾盆地涠西南凹陷涠洲组二段油气成藏特征分析
Hydrocarbon accumulation characteristics of the 2nd member of Weizhou Formation in the Weixinan Sag, Beibu Gulf Basin
摘要
Abstract
The Weixinan Sag in the Beibu Gulf Basin of the South China Sea is a hydrocarbon-rich sag. However, currently limited oil and gas were found in the 2nd member of Weizhou Formation,and the hydrocarbon accumulation characteristics and laws were unclear, which restricted next exploration direction. The main controlling factors and accumulation rules of oil and gas in the 2nd member of Weizhou Formation were studied based on laboratory tests and drilling and seismic data. The crude oil of Weizhou Formation was mainly originated from the thick oil shale in the central and upper parts of the 2nd member of Liushagang Formation.The lacustrine mudstones in the upper part of the 2nd member of Weizhou Formation provided regional cap rocks.Oil and gas were mainly distributed close to the source rock connected faults of the no.2 fault zone,which were the keys for hydrocarbon accumulation.Fault block traps with roof ridge structures generated by reverse faults and SGR>0.64 and SSF<1.70 at fault sections were favorable for hydrocarbon accumulation,providing an exploration target and direction for the next step.关键词
断层侧封/沟源断裂/成藏规律/涠洲组二段/涠西南凹陷/北部湾盆地Key words
lateral sealing of fault/source rock connected fault/hydrocarbon accumulation rules/2nd member of Weizhou Formation/Beibu Gulf Basin分类
能源科技引用本文复制引用
邹明生,曾小明,吴碧波,王彬,黄冬梅,高凌..北部湾盆地涠西南凹陷涠洲组二段油气成藏特征分析[J].石油实验地质,2018,40(3):330-336,7.基金项目
"十三五"国家重大科技专项(2016ZX05024-006)资助. （2016ZX05024-006）
