低渗凝析气藏注干气吞吐模拟研究  

Simulation Study on Dry Gas Huff and Puff of Low-permeable Condensate Gas Reservoir

作　　者：蒙春[1] 郭平[1] 汪周华[1] 王记俊[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《重庆科技学院学报（自然科学版）》2014年第6期39-43,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：教育部高校博士点基金项目(20115121110002)

摘　　要：应用数值模拟技术,在当前井底压力基础上对比分析不同初始含水饱和度及裂缝参数下的单井吞吐实施效果。研究表明:储层初始含水饱和度越高,越能增大凝析油采出程度;裂缝的存在会降低凝析油和天然气的采出程度;发育有裂缝的储层,随着裂缝半长增加,凝析油和天然气的采出程度都是先增加后减小;在相同的裂缝长度下,共轭缝的吞吐效果逐渐变差;随着裂缝宽度的增加,凝析油和天然气的采出程度先减小后增加。提出以衰竭生产相同时间作为评价注气吞吐效果的基础,以注气前产量作为吞吐结束的标准。With references to the practical production well data,huff and puff effect of single well at different initial water saturation and fracture parameters were compared and analyzed based on current bottom hole pressure through the numerical simulation technology. The results show that as initial water saturation increases,the recovery degree of condensate liquid get higher and higher; the existence of fracture reduces recovery of both condensate liquid and gas. And as for fractured reservoir,the recovery degree of hydrocarbon first increases,then decreases with the increase of fracture half length; under the same fracture length,conjugate fracture reduces the huff and puff effect;with the increase of fracture width,the recovery degree of hydrocarbon first decreases then increases. A new end standard of huff and puff is proposed that on the basis of the same depletion time when gas production is down to the volume before gas injection,huff and puff process is over.

关 键 词：低渗凝析气藏 注干气吞吐 数值模拟 裂缝参数 初始含水饱和度 

分 类 号：TE319[石油与天然气工程—油气田开发工程]