煤田地质与勘探2011，Vol.39Issue(4)：16-19,4.DOI:10.3969/j.issn.1001-1986.2011.04.005
考虑压裂裂缝的煤层气藏井网井距确定方法
Determination methods of well pattern and spacing for coalbed methane reservoir considering hydraulic fractures
摘要
Abstract
Hydraulic fracturing is usually necessary in low permeability area for vertical CBM well, this means the well spacing is dependent on the fracture parameter. By comparing the production and recovery in different fracture length and conductivity, the effect of fracture on gas production is analyzed and the law is revealed. Based on evaluation of the well spacing in which the gas recovery is up to 50% for 15 years, the relation of fracture and well spacing is studied. It shows that the well spacing can be enlarged as the length and conductivity of fracture become larger, especially in low permeability coal seam. Thus, the well spacing along fracture direction can be increased, rectangular or diamond patterns are good choice. Take a CBM reservoir in China for example, rectangular pattern 350 m*300 m or diamond pattern 700 m*400 m are recommended.关键词
煤层气/裂缝长度/裂缝导流能力/井距/井网Key words
coalbed methane (CBM)/ fracture length/ fracture conductivity/ well spacing/ well pattern分类
天文与地球科学引用本文复制引用
徐兵祥,李相方,邵长金,陈东,黄勇,胡小虎..考虑压裂裂缝的煤层气藏井网井距确定方法[J].煤田地质与勘探,2011,39(4):16-19,4.基金项目
国家重大基础研究发展计划(973计划)项目(2009CB219606) （973计划）
国家科技重大专项课题(2009ZX05038-005) （2009ZX05038-005）
