低渗透底水气藏压裂气井见水时间预测  

Prediction of Water Breakthrough Time in Fractured Gas Well in Low-Permeability Gas Reservoir with Bottom Water

作　　者：张庆辉 屈信忠 柳金城 陈晓冬 石正灏 

机构地区：[1]中国石油青海油田分公司勘探开发研究院,甘肃敦煌736200

出　　处：《新疆石油地质》2014年第1期77-81,共5页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2011ZX05015-004);中国石油重大科技专项(2011E-03)

摘　　要：通过建立平面径向流和半球面向心流相结合的压裂气井水锥计算模型,推导出低渗透底水气藏压裂气井见水时间计算公式,并结合数值模型模拟分析,证实了对于打开程度较低的压裂气井,裂缝的存在延缓了气井的底水锥进,见水时间延迟,并且裂缝半长越长,这种效果越明显。将该见水时间公式应用于中国石化所辖的某低渗透底水气藏YS1井的计算结果表明,压裂后气井的见水时间明显延长,无水采收率提高。This paper developed the water conning computational model for fractured gas well in consideration of both horizontal radial flow and semi-spherical flow,derived the water breakthrough time formulae for post-fracture gas well in low permeability gas reservoir with bottom water.The numerical simulation analysis shows that partial penetration of this fractured gas well could delay the conning of bottom water and the time of water breakthrough due to existence of fractures,and the longer the fracture semi-length,the better the response is.Applying these formulae into the case study of Well YS1 in such a reservoir given by Sinopec indicates that a post-fracture gas well can get delay of water breakthrough time obviously,and enhance its water-free recovery factor.

关 键 词：低渗透气藏 底水气藏 气井 压裂裂缝 见水时间 预测 

分 类 号：TE375[石油与天然气工程—油气田开发工程]