煤田地质与勘探2011，Vol.39Issue(2)：26-29,4.DOI:10.3969/j.issn.1001-1986.2011.02.006
低渗煤层注入/压降试井注入时间研究
Injection time of injection/fall off test in the low-permeability coal seam
杨新辉 1李彬刚 1李鑫1
作者信息
- 1. 中国煤炭科工集团西安研究院,陕西,西安,710054
- 折叠
摘要
Abstract
The purpose is to obtain the rough injection-time range when the radial flow happens during injection/fall-off test in low-permeability coal seam. Based upon the theory and experience of injection/fall-off test, studies of large amounts of real data and field experiments on the spot were conducted, and finally the feasible measures were presented,which is to reduce the well-bore storage time, prolong testing time and realize third-level well bore configuration in CBM well. The results show that within certain testing time, if radial flow happens during injection/fall-off test in low-permeability coal seam, it must guarantee tinj＞3 twb, tfall≥ 2tinj under conditions of ensuring well-bore safety.关键词
低渗煤层/井筒储集系数/三开井制Key words
low-permeability coal seam/ wellbore storage coefficient/ third-level well bore configuration分类
天文与地球科学引用本文复制引用
杨新辉,李彬刚,李鑫..低渗煤层注入/压降试井注入时间研究[J].煤田地质与勘探,2011,39(2):26-29,4.
