基于层间干扰中劣势渗流层的实验认识及矿场实践——以渤海油田PLX油田为例  

Experimental understanding of inferior seepage layer based on interlayer interference and its field practice--Taking Bohai PLX oilfield as an example

作　　者：李金宜 李其正 刘英宪 罗宪波 康凯 陈娜娜 LI Jinyi;LI Qizheng;LIU Yingxian;LUO Xianbo;KANG Kai;CHEN Nana(Bohai Petroleum Research Institute,Tianjin Company of CNOOC(China)Co.,Ltd.,Tianjin 300459,China;CNOOC Experimental Center,Engineering Technology Company of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459 [2]中海油能源发展股份有限公司工程技术分公司中海油实验中心,天津300452

出　　处：《石油地质与工程》2022年第2期76-81,共6页Petroleum Geology and Engineering

基　　金：国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(2016ZX05058-001);中海石油(中国)有限公司重大项目“渤海油田3000万吨持续稳产关键技术研究”(CNOOC-KJ135 ZDXM36 TJ)。

摘　　要：以渤海PLX油田为例,围绕多层合采层间干扰中的Ⅰ类、Ⅱ类、Ⅲ类储层,开展干扰机理、干扰幅度方面的实验研究。基于微观驱油实验分析Ⅱ类、Ⅲ类劣势渗流储层微观孔喉结构非均质性及其对剩余油富集和演变规律的影响,劣势渗流层更容易存在前缘指进、连通性差等现象,剩余油以连片状大量富集为主,油滴状、油膜状剩余油较少。基于长岩心驱替实验评价多层合采下的层间干扰对各渗流层的影响,Ⅰ类储层最大干扰幅度达10%,Ⅲ类储层最大干扰幅度可达30%,结合实验数据给出干扰系数图版,可有效指导油田细分层系挖潜。矿场先导试验井投产成功表明,对劣势渗流层细分注采,可提高层间纵向均衡驱替,释放劣势渗流层潜力,增大单井控制储量整体采出程度。Taking Bohai PLX oilfield as an example,the experimental research on interference mechanism and interference amplitude is carried out around Type Ⅰ,Type Ⅱ and Type Ⅲ reservoirs in multi-layer combined production interlayer interference.Based on the micro oil displacement experiment,the micro pore throat structure heterogeneity of Type Ⅱ and Type Ⅲ inferior percolation reservoirs and its influence on the enrichment and evolution law of remaining oil are analyzed.The inferior percolation layers are more prone to leading edge fingering and poor connectivity.The remaining oil is mainly concentrated in continuous pieces,and there are less oil droplets and oil films.According to the long core displacement experiment,the influence of interlayer interference on each seepage layer under multi-layer combined production is evaluated.The maximum interference amplitude of Type Ⅰ reservoir is up to 10%,and that of Type Ⅲ reservoir is up to 30%.Combined with the experimental data,the interference coefficient chart is given,which can provide a guidance for the potential tapping of subdivided strata.The successful operation of pilot test wells shows that the subdivided injection and production of inferior seepage layers can improve the vertical balanced displacement between layers,release the potential of inferior seepage layers and increase the overall recovery degree of single well controlled reserves.

关 键 词：层间干扰 劣势渗流 水驱油效率 剩余油 

分 类 号：TE34[石油与天然气工程—油气田开发工程]