延川南致密砂岩压裂关键技术应用  

Application of key fracturing technology in tight sandstone of South Yanchuan block

作　　者：周成香[1] 谢先平[1] 胡圆圆[2] 

机构地区：[1]中国石化华东分公司非常规指挥部,山西乡宁042100 [2]中国石化华东分公司物探研究院,江苏南京210007

出　　处：《油气藏评价与开发》2014年第1期66-68,78,共4页Petroleum Reservoir Evaluation and Development

摘　　要：针对鄂尔多斯盆地东南缘延川南煤层气工区致密砂岩储层的地质状况,优选出低伤害、携砂能力强、高效返排特性的压裂液体系,配以纤维加砂、液氮伴注和压后返排控制技术,成功完成了一口致密砂岩井的现场压裂施工。施工用液221.7 m3,加入石英砂30 m3,纤维220 kg,伴注液氮16 m3,压裂后测试无阻流量达到8 457 m3/d,初步实现了鄂尔多斯盆地边缘浅层致密砂岩压裂技术的突破,对于合理开发此类储层具有重要的指导意义。Aimming at tight sandstone reservoir in CBM reservoir of South Yanchuan region in Ordos basin, a new fracture fluid sys tem which had the properties of low reservoir damage, strong carrying capacity and fast flowback was optimised. Equipped with tech nologies of gravel input with fibre, accompanied liquid nitrogen injection and flowback controlling after fracturing, a tight sandstone well succesfully completed fracturing in the field. The total construction liquid is 221.7 m^3, quartz sand is 30 m^3, fiber is 220 kg, liquid nitrogen injection is 16 m3. Open flow potential （OFP） reaches 8 457 m^3/d, initially realizing the breakthrough of tight sandstone frac turing technology in marginal shallow of Ordos basin, which has important guiding significance for rational exploring such reservoirs.

关 键 词：致密砂岩气 低伤害增效压裂液体系 压裂参数优化 现场施工 

分 类 号：TE357[石油与天然气工程—油气田开发工程]