泡沫压裂在延川南气田深煤层气井增产中的应用
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摘要
为提升深煤层气井压裂改造效果,提高单井产量,对目前现场应用的几种压裂液体系进行了适应性对比分析,提出泡沫压裂体系低滤失、高黏度、低伤害、易返排等特征在深煤层气井压裂中具有较好的适应性,在此基础上开展了2口井氮气泡沫压裂现场应用试验,取得较好效果:氮气泡沫压裂施工压力平稳,砂比提高,加砂连续,平均单井日产气量增幅超过1 000 m~3/d。
In order to improve the fracturing effect and increase the productivity, the adaptability of the fracturing fluid systems applied in field was comparatively analyzed. The foam fracture system was selected in consideration of the characteristics of low filtering loss, strong sand carrying capacity, low damage and auxiliary flowback which is suitable for the fracturing of high stress deep coal seam. On this basis, nitrogen foam fracturing field application test were carried out in two wells. The results showed that construction pressure of nitrogen foam fracturing is stable, sand ratio is increased, sand adding is continuous, and the average increase of single well gas production had exceeded 1 000 m~3/d.
In order to improve the fracturing effect and increase the productivity, the adaptability of the fracturing fluid systems applied in field was comparatively analyzed. The foam fracture system was selected in consideration of the characteristics of low filtering loss, strong sand carrying capacity, low damage and auxiliary flowback which is suitable for the fracturing of high stress deep coal seam. On this basis, nitrogen foam fracturing field application test were carried out in two wells. The results showed that construction pressure of nitrogen foam fracturing is stable, sand ratio is increased, sand adding is continuous, and the average increase of single well gas production had exceeded 1 000 m~3/d.
引文
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[4]李春,张云鹏,张璐,等.沁水盆地深煤层储层特征及压裂改造技术[J].煤炭技术,2016,35(8):94-97.
[5]陶树,汤达祯,许浩,等.沁南煤层气井产能影响因素分析及开发建议[J].煤炭学报,2011,36(2):194.
[6]杨焦生,李安启.樊庄区块煤层气井开发动态分析及分类评价[J].天然气工业,2008,28(3):96-98.
[7]刘敏.深煤层气井用泡沫压裂液研究[D].成都:西南石油大学,2014.
[8]李小刚,杨兆中,粱知,等.深埋煤层气藏水力压裂增产技术探讨[J].天然气与石油,2011,29(6):46-48.
[9]许卫,李勇明,郭建春,等.氮气泡沫压裂液体系的研究与应用[J].西南石油大学学报(自然科学版),2002,24(3):64-67.
[10]王智君,詹斌,勾宗武.氮气泡沫压裂液性能及应用评价[J].天然气勘探与开发,2015,38(1):82-87.
[11]程秋菊,胡艾国,熊佩,等.氮气泡沫压裂液用作煤层气井性能研究[J].应用化工,2011,40(10):1675.
[12]李兆敏,吕其超,李松岩,等.煤层低伤害氮气泡沫压裂液研究[J].中国石油大学学报:(自然科学版),2013,37(5):100-106.
[13]李兆敏,安志波,李宾飞,等.氮气泡沫压裂液的性能研究及评价[J].钻井液与完井液,2013,30(6):71.
[14]段百齐,管保山,王树众,等.氮气泡沫压裂液流变特性试验[J].石油钻采工艺,2005,27(4):71-74.
[15]张云鹏,杨兆中,李小刚,等.适用于煤层的新型氮气泡沫压裂液研究[J].应用化工,2014(11):1941.