环太平洋活动大陆边缘盆地类型及油气成藏条件

The basin types and reservoir forming condition of circum-Pacific active margins

周树青 黄海平 林畅松 李存贵

Zhou Shuqing Huang Haiping Lin Changsong Li Cungui

中国地质大学能源学院, 北京 100083; 中国石油化工股份有限公司中原油田分公司第四采油厂, 河南濮阳 457073

School of Energy Resources, Chinese University of Geosciences, Beijing 100083, China; Oil Plant No.4, Zhongyuan Petroleum Exploration Bureau, Puyang 457073, China

环太平洋地区是主要的活动大陆边缘发育地,发育许多与活动大陆边缘有关的盆地。安第斯型大陆边缘主要发育弧前盆地和弧后前陆盆地,日本海型大陆边缘主要发育弧前盆地、陆架盆地和弧后盆地,转换断层大陆边缘主要发育走滑盆地。通过从盆地的形成模式、构造演化、沉积特征方面分析各类盆地的特征,并进一步从生烃条件和储集条件等方面分析了各种盆地的油藏形成条件,认为转换断层边缘盆地、陆架边缘盆地、弧后盆地成藏条件较好,可以形成大型的油气藏;而弧前盆地成藏条件较差。

Many basins related to active margins locate on Circum-Pacific areas. Forearc basins and retroarc foreland basins locate on the Andean-style margins; forearc basins, shelf basins and backarc basins locate on the Japan Sea-style margins, and pull-apart basins locate on strike-slip margins. This paper analyses the forming models, tectonic evolving and sedimentary characteristics of these basins, and the reservoir forming condition. Some conclusions were as follows:reservoir forming condition is good in pull-apart basins, shelf basins and back-arc basins, but it is poor in forearc basins.