摘要
辽河滩海地区西起葫芦岛,东至鲅鱼圈连线以北,沙河街组三段和一段分别为该区的主力烃源岩和储层.根据本区的地质、地球物理及地球化学资料,参考邻区的部分参数及专家意见,进行的生、排烃模拟结果表明,模拟区内主力生烃层为沙河街组三段,次为沙河街组一二段,平面上以盖州滩洼陷、海南洼陷和清水洼陷为主要生烃中心,以海南次洼和锦州9-3南次洼为次要生烃中心.模拟区的东部凹陷生油兼生气,西部凹陷以生油为主,东营组时期进入生烃高峰.排烃高峰期始于东营组一二期.一直持续至今,排油中心与生烃中心吻合,但排气强度略有区别,东部凹陷的排气强度高于西部凹陷.
Abstract
Liaohe Beach starts from Hulu Island in the west and ends at Boyuquan in the east.The principal hydrocarbon source rocks are Sha-3 member and the reservoir rocks are Sha-1 member.According to the geological,geophysical and geochemical data of the beach area as well as some parameters of its neighbouring area,a simulation of hydrocarbon generation and expulsion was wade.The results suggest that the principal source rocks are Sha-3 member,and secondly Sha-1 and Sha-2 members;Gaizhoutan,Hainan and Qiugshui Sags are main hydrocarbon generation centres,and Hainan Subsag and the south of Jinzhou 9-3 Subsag are secondary.It is also suggested that the east sag of the simulated area is mainly oil-bearing type and the west sag is mainly gas-bearing type.Major hydrocarbon genention stage started from Dongying period,the peak period of hydrocarbon expulsion started from Dongying 1～2 stages.Hydrocarbon generation centres coincided with hydrocarbon expulsion centres.\;
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