东海西湖凹陷第三纪岩浆活动与油气聚集的关系

Tertiary Magmatism and Its Relationaship with Oil/Gas Accumulation in the Xihu Sag, the East China Sea

胡惠娟 陶国保

Hu Huijuan Tao Guobao

上海海洋石油规划设计研究院

Shanghai Offshore Petroleum Plan and Design Institute

油气区的岩浆活动是石油地质学家极为关注的问题之一。在东海西湖凹陷的油气勘探中,尤其在其中南部,已较多地揭示了第三纪岩浆活动。这将直接影响油气勘探部署。本文利用物探和钻探成果,对岩浆岩的时空分布、岩浆活动与油气聚集的关系及圈闭类型作了分析,并认为,本区的岩浆活动对油气聚集来说,利大于弊,西湖凹陷中南部的岩浆岩发育区是油气勘探的新领域。

Magmatism of the oil/gas area is one of the problems that is caused extensive attention by petroleum geologists. During oil/gas exploration in the East China Sea, especially in the middle-southerm part of the Xihu Sag, the Tertiary magmatism is considerably revealed. This will directly affect the deployment of oil/gas exploration. In this paper, the distribution of the Tertiary magmatic rock in time and space, the relationship of the magmatism with oil/gas accumulation and the trap type related with magmatic rock is analyzed. A result of the analysis Shows that the magmatism still be advantage to oil/gas accumulation in a certan degree as compared wieh the destroy effest,whereas the developmental area of magmatic rock could is regarded as the next frontier for oil/gas exploration in the middle-southern part of the Xihu Sag.