非均匀污染下水平气井产能新模型  

A new deliverability model for horizontal gas well under non-uniform damage

作　　者：陈凤[1] 李晓平[1] 王子天[1] 田敏[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室

出　　处：《岩性油气藏》2012年第1期121-124,128,共5页Lithologic Reservoirs

基　　金：油气藏地质及开发工程国家重点实验室开放基金资助项目"复杂气井试井分析现状及应用研究"(编号:PLN0422)部分成果

摘　　要：对水平气井产能的准确预测有助于经济有效地开发气田。为了得到符合实际的水平气井产能公式,在将气体流动过程视为储层渗流和井筒流动的基础上,考虑井筒附近非均匀污染和井筒压降对水平气井产能的影响,建立了新的水平气井半解析产能模型。该文利用新建的模型实例计算水平气井的产量,并与均匀污染下(不考虑井筒压降)的产量进行对比,同时分析井筒压降在不同渗透率条件下对水平气井产能的影响,以及非均匀污染对产能的影响,为进一步完善实际水平气井和多分支气井的产能分析提供了理论依据。Water cut curve matching is the important part of the history matching of polymer flooding. There are two important fitting points in the water cut curve, which are polymer flooding effective point and water cut lowest point. In the numerous affecting polymer flooding factors, we selected relative viscosity of polymer solution, polymer adsorptive capacity, residual resistance factor and inaccessible pore volume as characteristic parameters for sensitivity analysis, and defined the sensitivity coefficient. Through sensitivity analysis, we know that the values of fitting points reduce with the increase of relative viscosity of polymer solution, residual resistance factor and inaccessible pore volume, but increase with the increase of polymer adsorptive capacity. The sensitivity of polymer flooding characteristic parameters on water cut curve from strong to weak is： polymer adsorptive capacity, relative viscosity of polymer solution, inaccessible pore volume and residual resistance factor.

关 键 词：水平气井 产能 非均匀污染 井筒压降 半解析模型 耦合 

分 类 号：TE332[石油与天然气工程—油气田开发工程]