煤田地质与勘探2017，Vol.45Issue(1)：51-55,5.DOI:10.3969/j.issn.1001-1986.2017.01.010
煤基质膨胀收缩对储层渗透率影响的新数学模型
New mathematical model of the influence of coal matrix swelling and shrinkage on reservoir permeability
裴柏林 1郝杰 1张遂安 1杨立源1
作者信息
- 1. 中国石油大学(北京)煤层气研究中心,北京 102249
- 折叠
摘要
Abstract
Coal seam permeability variation is affected by many constraints, of which the effective stress and swelling-shrinkage of the coal matrix are the major factors in the process of coal adsorption and desorption. In these two aspects, according to the volume invariance principle and the MATCHSTICK model, it brought out a new model that predicts permeability variations and effectively avoids the permeability simulation error problem using uncertain parameters in classic models. Research results show that the permeability changes with coal seam pres-sure consists of 3 kinds of theory models.We should as far as possible make the permeability curves present the trend of slow decline, stable and rapid increase during coalbed methane production. At last, it proved that the de-rived model is correct and practical through the comparison with classic P&M model and S&D model simulation and validation of field test data.关键词
煤层气/膨胀收缩/渗透率/有效应力Key words
coalbed methane/swelling and shrinkage/permeability/effective stress分类
天文与地球科学引用本文复制引用
裴柏林,郝杰,张遂安,杨立源..煤基质膨胀收缩对储层渗透率影响的新数学模型[J].煤田地质与勘探,2017,45(1):51-55,5.
