摘要
在借鉴国外煤层气开发的经验及分析国外工程技术特点的基础上,利用数值模拟方法,建立了基于渗透率量化分级的完井和增产措施优选准则。通过对数值模拟计算的累积产气量分析,将煤层分为低渗、中渗以及高渗3个类别,并依此选择相应最合适的完井增产方法。低渗煤层（〈0.5×10-15m2）适合选用水平井或者多分支水平井完井;中渗煤层（0.5×10-15~10×10-15m2）适合选用直井压裂的方式;高渗煤层（〉10×10-15m2）适合选用洞穴和扩孔等完井方式。
Based on the results of numerical simulations, a permeability-based strategy was established in order to select completion and stimulation methods. As a result, all coal seams can be categorized into three groups, including low-permeability seam, moderate-permeability seam and high-permeability seam. Multi-lateral and horizontal wells can be best applied in low-permeability seams, vertical well with hydraulic fractures can meet the need of moderate-permeability seams, and cavity completion can be considered in high-permeability seams.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第4期629-632,共4页
Journal of China Coal Society
基金
国家科技重大专项资助项目(2011ZX05037-4)
国家重点基础研究发展计划(973)资助项目(2009CB219607)
中石油股份公司重大科技专项资助项目(2010E-2204)
关键词
煤层气
完井和增产
数值模拟
渗透率
coal bed methane （CBM）
completion and stimulation
numerical simulation
permeability
