提高川西浅中层气藏压后增产效果的对策  

Countermeasures against Improving Stimulation Effect after Fracturing Shallow and Medium-depth Gas Reservoirs, Western Sichuan Basin

作　　者：龙学 卿明友[2] 何兴贵[1] 张朝举[1] 何灿[1] 

机构地区：[1]中国石化西南石油局井下作业公司,四川德阳618000 [2]中国石化西南石油局固井公司,四川德阳618000

出　　处：《天然气技术与经济》2011年第2期31-33,78,共3页Natural Gas Technology and Economy

摘　　要：针对川西浅中层气藏存在的小规模加砂压裂增产效果差、压裂液返排率低、储层伤害大等问题,分析了提高压后天然气增产效果的大型加砂压裂与纤维加砂高效排液技术对策。大型加砂压裂造缝长度大,沟通的储层范围广,压后增产效果好;高效返排工艺能有效提高压裂液的返排速度和返排率,减少压裂液在地层中的滞留量,进而降低储层伤害,有效提高压后天然气的产能。现场应用结果表明,大型加砂压裂和高效返排工艺是有效提高川西浅中层气藏压后天然气增产效果和采收率的技术良策。For shallow and medium-depth gas reservoirs in western Sichuan Basin, there are many problems occurring in small-scale sand fracturing, such as poor stimulation effect, low backflow of drilling fluid and severe formation damage. In this study, two countermeasures against improving stimulation effect are presented, including large-scale sand fracturing and fiber sand high flowing back technology. After large-scale sand fracturing, facture-making is large in length; reservoir is connected widespread; and stimulation effect becomes better. Through high flowing back technology, both backflow rate and efficiency of drilling fluid can increase effectively; and retention of drilling fluid in formation can slow down, resulting in decreasing formation damage and increasing gas productivity after fracturing. In-situ application indicates that the two countermeasures can effectively increase not only stimulation effect but also recovery efficiency after fracturing.

关 键 词：侏罗系 致密气藏 压裂 返排 增产 

分 类 号：TE357.14[石油与天然气工程—油气田开发工程]