气水过渡带内底水凝析气藏数值模拟研究——以吉拉克TⅡ2^4凝析气藏为例  

The Numerical Simulation Study of Basal Water Condensate Gas Reservoir in Gas-Water Transition Zone：An Example from TⅡ2~4 Condensate Gas Reservoir in Jilake Gasfield

作　　者：李世川[1,2] 黄召庭[1] 江同文[3] 牛玉[1] 阳建平[1] 成荣红[1] 谢伟[1] 汪斌[1] 

机构地区：[1]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [2]西南石油大学,四川成都610500 [3]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《天然气地球科学》2014年第11期1855-1860,共6页Natural Gas Geoscience

基　　金：国家科技重大专项"高压气藏安全高效开发技术"(编号:2011ZX05015-001);中国石油天然气股份有限公司重大专项"高压;超高压气田及凝析气田高效开发技术"(编号:2010E-2103-01)联合资助

摘　　要：吉拉克TⅡ24底水凝析气藏构造幅度低,非均质性强,气藏顶部存在低电阻气层段,气水关系复杂。结合气藏地质和生产特征,对压汞资料分类评价并归一化处理计算气水过渡带高度,结果表明该气藏总体处于气水过渡带内,为气水过渡带内的底水凝析气藏。在对比各种建立气藏原始饱和度方法的基础上,采用毛细管压力法建立该气藏原始饱和度场并进行数值模拟研究。利用2种方法实现了产水气井的精细模拟:一是考虑饱和顺序对相对渗透率曲线影响,实现主要受可动水影响,初期见水且低产稳产水气井的精细模拟;二是采用局部网格加密准确描述反凝析与底水锥进对近井地带影响,实现主要受底水影响,见水后产水量逐渐增大的气井精细模拟。研究结果表明,这些方法对复杂凝析气藏模拟具有很好的效果,对同类气藏模拟具有重要的参考作用。The TⅡ24 basal water condensate gas reservoir in Jilake Gasfield has some characters,i.e.,low amplitude of structure,severe heterogeneity,low resistivity gas horizon in the top of gas reservoir,complex gas-water distribution.Combined with the geology setting and production performance of the gas reservoir,mercury penetration data were classified and handled to calculate the height of gas-water transitional zone,and it is concluded that it is a basal water condensate gas reservoir in gas-water transitional zone.Capillary pressure method was used to establish initial water saturation and to simulate gas reservoir.Two methods were used to delicately simulate gas wells which are producing water.Some wells with low and sustained producing water which were mainly affected by movable water were preferably simulated by considering saturation procedure for relative permeability curve.Some wells which were mainly affected by basal water were finely simulated by LGR to accurately describe retrograde condensation and bottom water coning in near wellbore.The findings indicate that these methods take advantage of simulating complex condensate gas reservoir,so these methods can be applied to other gas reservoirs.

关 键 词：吉拉克气田 气水过渡带 毛细管压力 饱和顺序 局部网格加密 数值模拟 

分 类 号：TE34[石油与天然气工程—油气田开发工程]