澳大利亚西北大陆架与尼日尔三角洲、坎波斯盆地油气地质条件的对比研究

THE COMPARISON RESEARCH OF HYDROCARBON GEOLOGIC CONDITIONS IN THE AUSTRALIAN NORTH WEST SHELF, NIGER DELTA BASIN AND THE CAMPOS BASIN

许晓明 于水 骆宗强 康洪全 聂志勐

Xu Xiaoming Yu Shui Luo Zongqiang Kang Hongquan Nie Zhimeng

中国地质大学(北京)博士后流动站, 北京, 100083 2. 中国海洋石油有限公司, 北京研究中心, 北京, 100027

Postdoctoral Center of China University of Geosciences, Beijing 100083, China 2. CNOOC Beijing Research Center, Beijing 100027, China

坎波斯盆地、尼日尔三角洲和澳大利亚西北大陆架这3个典型的被动大陆边缘盆地既有相似性,也有不同点,其不同之处表现在:①坎波斯盆地和尼日尔三角洲均只有一期裂谷,西北大陆架各盆地均有多期裂谷,这种多期裂谷使得西北大陆架的油气主要富集在裂谷层系中,而前两者主要分布在漂移层序;②由于烃源岩生烃性质不同,导致不同盆地油气分布特征有差异,前两者油多气少,而西北大陆架富气贫油;③三者油气分布主控因素不同,坎波斯盆地油气藏分布主要与浊积岩和盐岩运动有关,尼日尔三角洲油气藏分布与同生断层有关,西北大陆架油气分布则主要受构造所控制。

There are not only similarities but also unique characteristics among Campos Basin,Niger Delta Basin and Australian North West Shelf(NWS).The major unique characteristics are in three areas: 1.The oil and gas of the NWS rich in the rifting sequence,but Campos Basin and Niger Delta Basin rich in the drifting sequence.Its reason is the NWS has a few periods rifting or the others have one period rifting.2.Because the characteristics of hydrocarbon source rocks are different,the distribution characteristics of oil and gas are different in different basins.The NWS is abundant in gas and less in oil,otherwise the others abundant in oil and less in gas.3.The major controlling factors for distribution of oil and gas are different in the three basins,the factors of Campos Basin are the turbidity sands and salt movements,the factor of Niger Delta Basin is contemporaneous faults,the factor of the NWS is structure.

国家科技重大专项“西非及亚太地区被动大陆边缘盆地油气勘探开发一体化技术项目”(2008ZX05000)

https://doi.org/10.11781/sysydz201001028