摘要
为了进一步明确页岩气藏渗流机理,提高产能评价的准确有效性,利用Eclipse油藏数值模拟平台,考虑有限导流和兰格缪尔等温吸附条件,建立了压裂水平井开采页岩气藏的模型,对比了不同裂缝参数对单井产能的影响。在此基础上,讨论了水力裂缝长度、间距、高度、导流能力和微裂缝渗透率、微裂缝-基质sigma系数及非达西因子等各敏感参数对页岩气累计产量和近井地带压力分布特征的影响。研究表明,微裂缝渗透率和水力裂缝半长是压裂水平井开采页岩气藏提高单井产量的关键影响因素。
Based on ECLIPSE numerical reservoir simulation,a model of shale gas recovery with hydraulic fracturing horizontal wells was built up by taking account of finite conductivity and Langmuir adsorption isotherm. The effects of various fracture parameters on shale gas production and near-wellbore pressure distribution are analyzed,such as hydraulic fracture length,fracture spacing, fracture height,fracture conductivity,micro-fracture permeability,micro-fracture-matrix sigma factor,non-Darcy factor and so on. The results demonstrate that micro-fracture permeability and fracture half length are the most critical to improving individual well producing rate.
出处
《特种油气藏》
CAS
CSCD
北大核心
2013年第5期114-117,156-157,共4页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"复杂油气田地质与提高采收率技术"(2009ZX05009-004-03)
中央高校基本基金"低渗透储层压裂开采井网流管模拟器开发"(2010ZY10)
关键词
页岩气藏
水力压裂水平井
敏感参数
裂缝长度
裂缝间距
裂缝高度
裂缝渗透率
shale gas reservoir
hydraulic fracturing horizontal well
fracture length
fracture spacing
fracture height
fracture permeability
