榆林气田山_2气藏产水特征及其影响因素  

Water producing character and influencing factors of Shan2 gas reservoir in Vulin Gasfield

作　　者：崔迎春 李天太[2] 李天才[3] 洪鸿[3] 郝玉鸿[3] 

机构地区：[1]陕西延长石油集团,陕西西安710068 [2]西安石油大学石油工程学院,陕西西安710065 [3]中国石油股份长庆油田分公司第二采气厂,陕西榆林719000

出　　处：《油气地质与采收率》2008年第6期86-88,91,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技攻关计划"陕甘宁盆地特低渗油田高效开发与水资源可持续发展关键技术研究"(2005BA901A13)

摘　　要：榆林气田山2气藏部分井产水量大,已经严重影响了气井产量。从气藏构造、沉积环境、储层物性和单井产水动态数据等方面研究了气藏产水机理与特征,并分析了气藏产水的影响因素及其影响程度。结果表明:气藏构造对气水分布影响显著,西南构造下倾方向成为富水区;沉积特征使山2气藏的非均质性严重,对气水分布的影响也非常明显,位于分流河道砂体的气井产水少,位于分流河道砂体边缘的气井产水较多;储层物性的差异越大,造成气水的分异作用越突出,致密储层部位气井含水饱和度相对较高,产出液气比较高。Some wells of Shan2 gas reservoir in Yulin Gasfield produces a lot of water,which affect the gas production of gas wells. Mechanism and character of waler production in the gas reservoir are researched from the aspects of structure of reservoir,depositional environment physical property of reservoir and dynamic water production data of single well. The influencing factors and degree are also analyzed. The results show that the structure of gas reservoir is an important influence factor of gas-water distribution,and the southwestern part becomes water-rich area. Depositional character makes the aeolotropism of Shan2 gas reservoir serious and influences the distribution of gas and water. Gas wells sitting on the distributary channel sandbody produce a little water,while others produce more. The difference in physical property of reservoir makes a great differentiation between gas and water. Gas wells in dense reservoirs have relatively more oil saturation and higher produced liquid-gas ratio.

关 键 词：产水特征 气藏构造 沉积特征 储层物性 富水区 榆林气田 

分 类 号：TF37[冶金工程—冶金机械及自动化]