半解析中心管控水完井耦合模型求解及其在高含水油藏水平井中的应用  

Solution of the semi-analytical coupling model of improved stinger-completion and its application in horizontal wells of high water cut reservoirs for water-cut controlling and oil-production increasing

作　　者：于法珍[1] 蒋贝贝[2] 肖泽锋 李海涛[2] 冯涛 YU Fa-zhen;JIANG Bei-bei;XIAOZe-feng;LI Hai-tao;FENG Tao(SINOPEC Shengli Oilfield Branch Company,Dongying 257237,China;Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中石化胜利油田分公司,山东东营257237 [2]西南石油大学,四川成都610500

出　　处：《应用化工》2019年第S01期110-114,119,共6页Applied Chemical Industry

摘　　要：半解析中心管控水完井耦合模型,是在Jansen等人提出的普通中心管完井基础上,将原来的二维渗流模型拓展为三维渗流,并进一步优化中心管结构后得到。改进后的中心管结构更加合理,模型考虑因素(井眼轨迹、渗透率分布、水平井筒变质量流动等)更为全面,突破了普通中心管完井在非均质底水油藏中的应用限制。但是,改进后中心管盲筛结构下的模型求解难度很大,这是因为部分盲管段中存在分流面,无法准确判断流体在环空的分流位置。通过分开讨论流体在盲管与筛管中的流动,并将试算法应用到分流面位置的确定中,利用计算机编程进行模型求解,有效解决了这一难题。现场多个油田的实例施工表明,改进后中心管控水完井成本低廉、操作简便且能有效控水,特别在底水油藏高含水率水平井中有较好的稳油控水效果。The semi-analytical coupling model of improved stinger-completion,which is developed based on the common stinger-completion proposed by Jansen,et al,extends successfully the original two-dimensional seepage model of common stinger into three-dimensional seepage model after optimizing the common stinger downhole structure.The structure of the optimized stinger-completion is more comprehensive,and the corresponding semi-analytical coupling model can also take more factors into consideration,such as well trajectory,permeability distribution,and variable mass flow in the horizontal wellbore,which makes the new model more close to the actual oil field situation.However,after optimizing the downhole structure,there will exist divided-flow interface that is very difficult to be judged accurately in the annulus of the blind-pipe section,which makes the new model more difficult to be solved.By analyzing separately the two flow patterns in the blind pipe and the perforated pipe along the horizontal wellbore,together with the trial and error method,the new model can be effectively solved under the help of the computer programming.The successful application of the improved stinger-completion in different oil fields also confirms the low cost,feasibility and effectiveness of the improved stinger-completion.

关 键 词：半解析模型 改进中心管完井 分流面 试算法 底水油藏 

分 类 号：TE355.5[石油与天然气工程—油气田开发工程]