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惠民凹陷临南斜坡带油气纵向分布特征为 :曲堤地垒发现 4套主要的含油层系 ,西南缓坡带只在沙四上亚段发现了含油气层位 ,白桥—仁风潜山带无油气显示 ,夏口断裂带下降盘油气主要集中分布在沙三段、沙二段。认为控制油气沿断层纵向运移的地质因素有 :发育馆三段和沙一段区域性盖层 ;全区大规模油气运移期所有断层的活动都较弱 ,限制了油气的纵向运移 ;断裂带具有走滑性质 ,限制了纵向运移 ;斜坡带远离油源 ,油源不充足 ,同时只在局部地区存在异常压力带 ,垂向运移能量不足。曲堤油田纵向含油层系长是油源充足、晚期断层活动强烈造成的 ,而西南缓坡带发生油气纵向运移的可能性小 ,勘探目标应集中在沙一段区域盖层之下的层位。图 1参 5(王孝陵摘 )
The longitudinal distribution of oil and gas in the Linnan slope zone in the Huimin Depression is that four major oil-bearing strata have been found in the Quti barrier. The southwest gentle slope belt has only found oil-bearing layers in the Upper Member of the Fourth Member of the Shahejie Formation, With no oil and gas, the oil and gas in the descending plate of the Xiakou fault zone mainly concentrated in the third member of Shahejie Formation and the second member of Shahejie Formation. It is considered that the geological factors that control the longitudinal migration of oil and gas along the fault are: the third member of the Development Hall and the regional caprock of Shahejie Formation; all the faults in the large-scale oil and gas migration during the whole region are weak in activity, limiting the longitudinal migration of oil and gas; It has the characteristics of strike-slip and limited the longitudinal migration. The slope belt is far away from the oil source and the oil source is not sufficient. At the same time, there is an abnormal pressure belt only in some areas, and the vertical migration energy is insufficient. Longitudinal oil-bearing strata in Quti Oilfield are caused by abundant oil source and intense fault activity in the late stage. However, longitudinal migration of oil and gas in southwest gentle slope zone is less likely. The exploration target should be concentrated in the layer beneath the caprock of Sha-1 area. Figure 1 Senate 5 (Wang Xiaoling pick)