任丘基岩油藏形成的再分析

THE FORMATION OF SINIAN SUBERATHEM BASEMENT RESERVOIR IN RENQIU

任丘基岩油藏主要在上元古界蓟县系雾迷山组之中,其储集岩为藻白云岩经风化溶蚀形成,有溶洞层7层。生油岩是下第三系沙河街组第三段。原油生成后,在下第三系东营组沉积结束时开始运移,大量运移的时间大约在晚第三纪末,油藏最后形成并且定型是在第四纪,因此是比较晚的。

<ABSTRACT>: The formation of Sinian suberathem basement reservoir rocks in Renqiu is the result of weathering and erosion of dolomites. Before the bu-rial of basement rocks, seven zones of dolomites with dissolution cavities had been formed. The source rock is the 3rd member of Shahejia Formation of paleogene. The time of migration started after the deposition of Dongying Formation, ended, i.e., by the end of paleogene after crude oil was generated. But the Urge scale of oil migration into the basement reservoir did not take place until the end of Neogene, so that the oil reservoir took its final shape late in the Quarternary.