考虑渗透率变化的凝析气井流入动态分析  

The Analysis of Inflow Performance Considering Permeability Changing For Condensate Gas Wells.

作　　者：唐恩高[1] 李相方[1] 覃斌[1] 程时清[1] 

机构地区：[1]石油大学(北京),北京102249

出　　处：《油气井测试》2005年第2期7-9,13,共4页Well Testing

基　　金：国家重点基础研究发展规划(973)项目(2001CB209108)国家自然科学基金项目(2003)--深层含水凝析气藏多相渗流理论研究(No.90210018)资助。

摘　　要：为解决目前凝析气井流入动态预测存在较大偏差的难题,在描述储层生产状态的基础上,首次提出无因次产能系数,其实质是描述了内区渗流动态对整个储层渗流能力的影响。对无因次内外区渗透率、无因次边界半径进行了敏感性分析。结果表明,储层渗流能力主要受近井区控制。实例分析证明,内区的低渗透率会急剧降低无阻流量。因此,在生产中不可忽视内外区渗透率变化对流入动态的影响。In order to settle the problem with great error in inflow performance prediction, non-dimension deliverability coefficient is firstly presented based on describing production state of formation which essentially describes the influence of flow performance in porous media of interior zone on flow in porous media of whole reservoir. The non-dimension rate of permeability between interior and outside zone and non-dimension rate of radius between interior and outside zone are analyzed with sensitivity. The result shows that the ability of flow in media of reservoir is mainly controlled by interior zone. The analysis of example proves that the low permeability of interior zone will sharply reduce the maximum production rate. Therefore, the influence of change of permeability on inflow performance between interior and outside zone should not be ignored during production.

关 键 词：凝析气 动态分析 井流 渗流能力 敏感性分析 无因次 动态预测 生产状态 产能系数 边界半径 实例分析 无阻流量 低渗透率 流入动态 大偏差 储层 流动态 内区 外区 近井 

分 类 号：TE372[石油与天然气工程—油气田开发工程] P641.2[天文地球—地质矿产勘探]