考虑滑脱效应的低渗透气藏产能公式分析  

Analysis on Productivity Formula in Low-permeability Gas Reservoirs Considering Slippage Effect

作　　者：李冬瑶[1] 程时清[1] 郑春峰[1] 

机构地区：[1]中国石油大学(北京)石油工程教育部重点实验室,北京102249

出　　处：《石油天然气学报》2009年第1期138-141,共4页Journal of Oil and Gas Technology

基　　金：国家"863"计划项目(2006AA09Z338)

摘　　要：研究低渗透气藏中岩石的气体渗透性不能忽略滑脱效应的影响,通过对滑脱效应、二项式渗流效应以及地层损害因素的综合分析,从渗流力学的基本原理出发,建立稳定渗流条件下考虑气体滑脱效应的气体单相及气水两相流井的产能公式。应用该模型,对不同程度滑脱效应影响下的各流入动态曲线进行对比分析,从而揭示相同井底流压下,随着滑脱系数的增大,气井的产量越大。在低流压阶段,考虑滑脱效应产能比不考虑滑脱效应的产能高,滑脱效应在其开发后期会有利于气井生产。In the study of gas permeability in low-permeability gas reservoirs,slippage effect could not be ignored.Based on analyzing synthetically slippage effect,binomial flow effect and formation damage effect,productivity formulae of gas well and gas-water well are deduced according to the fundamental principle of seepage mechanics in porous medium.By using the models,different curves of inflow performance under different slippage effects were contrasted,and productivity of gas well was higher with slipage factor increasing under the same downhole flowing pressure.Productivity considering slippage effect is higher than that not considering slippage effect in low flowing pressure,slippage effect is beneficial for production of gas well at the late stage of production.

关 键 词：低渗透气藏 滑脱效应 产能公式 流入动态曲线 

分 类 号：TE377[石油与天然气工程—油气田开发工程]