中国南部NP坳陷的构造圈闭预测

NP坳陷是两套沉积构造层叠合在一起的断陷盆地,是中国南方油气勘探开发的潜力区块;但对坳陷内圈闭认识尚有不足。针对该问题,从地震角度来出发,以地质认识为指导,以岩-电-震关系为主线,对研究区开展二维精细构造解释研究,确立各标志层的地震波组特征,划分上下两套构造层。在此基础上,结合速度分析结果,落实研究区构造形态,预测研究区的构造圈闭分布;并结合钻井资料对预测结果进行评价。根据闭合幅度和圈闭面积等要素将预测圈闭分为3类。

Prediction of Structural Traps in NP Depression, South China

NP depression is a fault basin with two sedimento-structural layers superimposed together. It is the petroleum potential region of South China, but the traps of which are not completely understood. On the basis of previous geological understanding and rock-electric-seismic relations, fine two-dimensional structural interpretation is carried out to solve above problems. Following the establishment of marked beds and the division of structure beds, structural shape of the study area is confirmed and the distribution of structural traps is predicted combining the velocity analysis. Consider of the well data, the predicted results are evaluated. Three types of structural traps are classified in accordance with the essential factors including closure amplitude and trap area.