摘要
苏北盆地海安凹陷阜二段属于典型的低孔低渗致密油藏,为了评价该探区的储层物性、含油性以及为水平井井位部署提供设计依据,对该地区一口直井预探井进行了体积压裂。研究了储层的岩性、脆性、物性,在此基础上,为了满足在体积压裂时尽可能提高铺砂浓度的要求,优选了滑溜水和线性胶压裂液体系。为达到认清各小层的目的,采用了桥塞分层压裂、分层试油、打捞桥塞合层求产的技术措施。在施工前进行小型压裂测试来保证主压裂的顺利进行,并在施工时采用地面微地震技术来监测缝网体积。现场施工排量达到4.5~5.0 m^3/min,累计加砂140 m^3,最高砂比12%。裂缝监测表明各层的造缝效果较好,裂缝形态较为复杂。试油效果达到地质设计预期。
Fu 2 formation of the Haian Sag in the North Jiangsu Basin belongs to typically low porosity and permeability tight oil reservoir.In order to evaluate the reservoir physical property and oiliness of this exploration area and provide the design basis for the well location deployment of horizontal wells,volumetric fracturing was conducted for a vertical wildcat well in this area.On the basis of research on the lithology,brittleness and physical property of the reservoir,slick water and linear gel fracturing fluid were optimized to meet the requirement of increasing sanding concentration as much as possible during volumetric fracturing.For the purpose of recognizing each small layer,the technical measures of bridge plug and separate layer fracturing,separate layer test,fishing the bridge plug and commingled production were adopted.Before the construction,the small scale fracturing testing was carried out to guarantee the success of the main-fracturing.In the construction,the fracture network volume was monitored by using surface micro-seismic technology.The operational discharge capacity reached 4.5-5.0 m3/min,accumulative sand added volume was 140 m3 and the maximum sand ratio was 12%.Fracture monitoring indicates that fracture-making effect is very good in each layer,the fracture geometry is very complicated and the oil testing effect attains the expected geological design.
作者
陈挺
邹清腾
卢伟
刘臣
王治华
牛增前
CHEN Ting;ZOU Qingteng;LU Wei;LIU Chen;WANG Zhihua;NIU Zengqian(Research Institute of Engineering&Technology,CNPC Bohai Drilling Engineering Company Limited,Tianjin 300280,China;Drilling&Production Engineering Research Institute,CNPC Zhejiang Oilfield Company,Hangzhou 310023,Zhejiang,China;Oil&Gas Cooperation and Development Company,CNPC Bohai Drilling Engineering Company Limited,Tianjin 300280,China)
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2018年第3期375-380,共6页
Oil Drilling & Production Technology
关键词
致密油
体积压裂
小型压裂
裂缝监测
缝网体积
tight oil
volumetric fracturing
small scale fracturing
fracture monitoring
fracture network volume
