冀东南堡凹陷断裂系统的多重分形研究

Multifractal study on fault system in Nanpu sag, Jidong.

南堡凹陷的断裂对油气聚集起着重要的作用,利用多重分形方法分析了断裂与油田分布之间的关系;并根据南堡凹陷明化镇组底界断裂分布,计算了凹陷及其下属的五个构造带的多重分维值。分析了南堡凹陷多重分维值的特征和影响多重分维值的因素。研究结果表明,南堡凹陷断裂分布具有很好的自相似性,相关系数在0.99以上,断裂系统具有分形结构。并指出了油气聚集的有利区带。

Faults play an important role in oil and gas accumulation in Nanpu sag. Using multifractal method analyzed the relation between faults and oil fields'distribution. Multifractal dimension values of the sag and its subsidiary five structural belts were calculated by this method. The characteristic and influencing factors of the values were analyzed according to the fault distribution in the bottom boundary of Minghuazhen formation of Nanpu sag. The results show that good self-similarity appeared in the fault distribution of the sag with correlation coefficients better than 0.99, and faults had fractal structure. Then favorable areas of oil-gas accumulation have been ascertained.