大情字井区裂缝性油藏的压裂优化设计

Optimized fracturing design for naturally fractured reservoirs of Daqingzi Oilfield

大情字井区是一个具有亿吨级储量规模的大型油田,地质情况比较复杂,裂缝比较发育,压裂施工成功率较低,加砂量小,起不到有效认识储层产能的作用。根据大情字井区裂缝性油藏的特点,阐述了裂缝性油藏的压裂设计思路、压裂优化设计和压裂施工的难度,提出裂缝性油藏和非裂缝性油藏压裂设计的不同之处。根据大情字井区储层的地质条件,采用降滤失措施和压裂优化设计,提高了裂缝性油藏的施工规模,有效地认识了储层的产能。给出了大情字井区裂缝性油藏压裂的实例。

According to such conditions as complicated geology, fracture development and low efficiency of fracturing stimulation in Daqingzi oilfield, which is one large oilfield with hundred million tons of reserves, the article describes the methods of fracturing design for naturally fractured reservoirs and difficulties of fracturing treatment . It gives the differences of fracturing design methods between the naturally fractured reservoirs and non naturally fractured reservoirs. Based on the feature of naturally fractured reservoir in Daqingzi, the fracturing designs of naturally fractured reservoir were optimized and effective filter-controlling methods were applied. The success of fracturing treatment has been developed and the highest production of wells has been acquired. Also, the fracturing cases of Daqingzi fractured reservoir have been given in this paper.