摘要
建立了致密油藏分段压裂水平井不稳定渗流数学模型,利用有限元法对其进行求解,分析了分段压裂水平井的流动阶段特征,对比了不同非均质情况下分段压裂水平井压力动态曲线的特征。研究表明:非均质性主要影响压力动态曲线第一径向流、第二线性流和晚期拟径向流阶段:当压裂区域与未压裂区域的基质流度之比α小于1时,α越小,压力动态曲线越向右上方移动,压力传播到油藏封闭边界的时间越晚,且压力导数曲线在晚期拟径向流阶段呈现"下凹"趋势。当α大于1时,压力动态曲线在晚期拟径向流阶段的斜率逐渐减小,且α越大,曲线越偏下。
Based on the Galerkin finite element method,the unstable flow mathematical model of multi-fractured horizontal well in the heterogeneous reservoir is established.In addition,flow phase characteristics of the multi-fractured horizontal well are analyzed.And the pressure transient curve of multifractured horizontal well in the case of different heterogeneity is contrasted.Results show that the heterogeneity mainly influences the bilinear flow phase,the reservoir linear flow phase and the pseudo radial flow phase:when the mobility ratio-αbetween the fractured area and the non-fractured area is smaller than1,the smaller theα,the more the pressure transient curve moves to upper right,the later the pressure moves to the closed boundary,and the pressure derivative curve shows a“concavity”trend in the pseudo radial flow phase.On the contrary,when theαis bigger than1,the slope of the pressure transient curve decrease gradually,and the bigger theα,the more the pressure transient curve moves to below.
作者
徐鹏
付春权
李兴科
刘岢鑫
Xu Peng;Fu Chunquan;Li Xing-ke;Liu Kexin(Faculty of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China;Oil and Gas Engineering Research Institute,Jilin Oilfield Company,Jilin 138000,China)
出处
《云南化工》
CAS
2017年第10期112-116,共5页
Yunnan Chemical Technology
基金
黑龙江省自然科学基金项目"致密油蓄能体积压裂渗流机理研究"(项目编号:E2016015)
关键词
分段压裂水平井
有限元法
非均质性
流度比
压力动态分析
multi-fractured horizontal well
finite element method
heterogeneity
mobility ratio
pressure transient analysis
作者简介
徐鹏（1993-），男，新疆奎屯人，硕士研究生，从事油气渗流理论与应用方面研究。
