低渗透油藏高含水期层间径向钻孔油藏工程优化研究  

Optimization of radial drilling branch number and length in low permeability reservoirs during high water cut period

作　　者：崔传智[1] 王秀坤 杨勇[2] 曹刚[2] 崔小朵[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2014年第5期61-64,115,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"胜利油田特高含水期提高水驱采收率技术"(2011ZX05011)

摘　　要：受层间储层物性差异的影响,低渗透油藏高含水期层间动用程度差异显著。层间径向钻孔是改善层间动用程度差异的重要技术之一,径向孔个数和长度是影响径向钻孔效果的主要因素。以2层合采油藏为例,以层间均衡动用为目标,以油水两相不稳定渗流理论和等值渗流阻力法为基础,综合考虑层间物性差异和动用程度差异,建立了高含水期油藏径向孔个数及长度的优化方法,并编制了相应的计算程序。采用油藏数值模拟技术对计算结果进行了验证,结果表明,采用新建方法计算结果进行径向钻孔后,层间动用程度差异改善显著,提高了油藏采收率,也表明了所建优化方法的可行性与准确性。Highly unbalanced displacement problems arise in low permeability reservoirs during high water cut period caused by inter-layer heterogeneity of petrophysical properties. Radial drilling is one of the important technologies to solve this problem. Branch number and branch length are the mainly variables affecting the performance of radial drilling. To achieve equilibrium displacement, an optimization model of the radial drilling branch length and number was established for two-layer comingled production reservoir by considering the inter-layer heterogeneities and displacement, and the corresponding calculation program were developed. Using reservoir numerical simulation technology, the prediction results show that radial drilling can solve the unbalanced displacement problems effectively and also prove the accuracy and applicability of this model.

关 键 词：低渗透油藏 高含水期 径向钻孔 优化模型 均衡驱替 

分 类 号：TE348[石油与天然气工程—油气田开发工程]