渤海油田低渗透储层笼统压裂实践与认识

渤中34-9构造位于黄河口凹陷中洼南部斜坡带上,郯庐断裂渤南段中支以东,主体区为受中部一组大断层控制的复杂断块构造,在明化镇组、东营组和沙河街组形成了大型复杂断块圈闭群。前期同一井区两口井产能较低,为提高该井区沙河街组产能,针对海上笼统压裂施工作业难点,采取相关技术手段,以钻井平台为依托,通过对笼统压裂参数设计的优化,使用新型RTTS封隔器+20/40目陶粒笼统压裂方式改造储层,实现了对渤中34-9油田M井的压裂改造。压裂后投产初期,日产油120 m3,设计钻后配产50 m3,增产效果明显,为后续渤海油田沙河街组低渗致密层井的开发提供了经验。

Practice and understanding of general fracturing for low permeability reservoirs in Bohai oilfield

The Bozhong 34-9 structure is located on the southern slope belt of the middle depression of the Huanghekou sag,east of the middle branch of the Bonan section of the Tanlu fault.The main area is a complex fault block structure controlled by a group of large faults in the middle.The Minghuazhen formation,Dongying formation and Shahejie formation formed large complex fault block trap groups.In the early stage,the productivity of two wells in the same well area was low.In order to improve the productivity of the Shahejie group in this well area,in response to the difficulties of offshore general fracturing operations,relevant technical measures were adopted,relying on the drilling platform,and by optimizing the design of general fracturing parameters.The new type RTTS packer+20/40 mesh ceramsite general fracturing method was used to reform the reservoir,and the fracturing reform of the M well in Bozhong 34-9 oilfield was realized.In the initial stage of production after fracturing,the daily oil production was 120 cubic meters and the increase in production was obvious,which provided experience for the subsequent development of low-permeability and tight-layer wells in the Shahejie formation of the Bohai oilfield.