非达西效应对碳酸盐岩凝析气井产能的影响  

NON-DARCY EFFECT ON WELL DELIVERABILITY IN CARBONATE GAS CONDENSATE RESERVOIRS

作　　者：李勇[1] 胡永乐[1] 李保柱[1] 夏静[1] 焦玉卫[1] 

机构地区：[1]中国石油勘探开发研究院油气田开发所

出　　处：《新疆石油天然气》2009年第1期44-46,105,共3页Xinjiang Oil & Gas

基　　金：国家重大基础研究发展规划(973)项目(2001CB209100)部分研究成果

摘　　要：反凝析现象对地层污染严重,而井底流体高速非达西流动效应则导致污染更加严重。随着国内塔中I号碳酸盐岩凝析气田投入开发,迫切需要开展相关研究,从而指导气田的开发。首先建立了高速非达西流动效应对产能的影响变量,然后通过建立双重介质单井径向组分模型,研究了不同类型气藏、初始井日产气量和Forchheimer系数情况下高速非达西流动效应对产能的影响。结果表明,裂缝越发育、裂缝系统储量越大、井日产气量越高、Forchheimer系数越大,高速非达西流动效应导致产能降低幅度越大;当地层压力为露点压力的30%～60%之间时,高速非达西效应对产能的影响最为明显。Retrograde condensation can seriously impair the formation,but the high velocity non-Darcy effect around wellbore can increase the impairment.With the development of Ta Zhong No.I carbonate gas condensate reservoir in China,it becomes more and more important to study the high velocity non-Darcy effect on well deliverability in carbonate gas condensate reservoirs in order to guide the field development.Firstly,an effect parameter of non-Darcy effect on well deliverability is expressed in a formulation,and then,through a dual-permeability compositional single-well radial simulation model,this paper gets the high velocity non-Darcy effect on well deliverability for different reservoir types,well initial gas production rates,and Forchheimer parameters.The results show well deliverability is reduced more with the high velocity non-Darcy effect.So the more developed fracture system,the larger reserve of the fracture system,the higher well gas production rate,and the larger Forchheimer parameter,the high velocity non-Darcy effect will result in the more reduction of well deliverability;the high velocity non-Darcy effect is relatively significant during the reservoir pressure between 30 percent and 60 percent of dew point pressure.

关 键 词：碳酸盐岩 凝析气藏 非达西效应 产能 双重介质 

分 类 号：TE344[石油与天然气工程—油气田开发工程]