马19块东营组剩余油分布控制因素

马19块的研究目的层东营组的马圈子油层经过40多年的开发,目前普遍存在产能低含水高的特征,因此挖潜剩余油成为马19块开发关键。通过精细油藏地质特征描述,分析剩余油主要分布在储层动用程度低的地区,受构造、沉积微相双重控制作用;断层的断棱、夹角、小断块附近,以及微高点剩余油富集;河道间薄层砂、分流河道侧缘、正韵律油层的中上部剩余油富集。

Influencing factors analysis of remaining oil distribution of Dongying formation in Ma 19 block

After 40 years of development,Target layer,Maquanzi oil layer of Dongying formation in Ma-19 block is characterized by low production capacity and high water cut,therefore,remaining oil tapping of Ma-19 block becomes the development focus at present.Through the analysis of the geological characteristics of fine reservoir,residual oil is mainly distributed in the reservoir with low degree of area,and doubly controlled by the structure and sedimentary microfacies.Around the fault-edge,included angle,small fault blocks,and micro-high points,remaining oil is enriched.Besides,interchannel thin sand layer,distributary channel lateral margin,and the mid-upper part of positive rhythm reservoir are also enriched with remaining oil.