河南理工大学学报（自然科学版）2018，Vol.37Issue(4)：55-60,6.
自仿射割理网络表征及流体渗流LBM模拟
Modeling of self-affine cleat network and LBM simulation of its fluid flow
摘要
Abstract
Cleat network dominates the migration of coalbed methane in coal reservoirs,therefore,to identify its permeability is vital for quantitative estimate productivity of coal reservoirs.Compared with experimental test, the numerical method has such features as high repeatability and not being affected by the environment,test precision and human factors.It has become an effective method for description of the reservoir microstructure and excavation of fluid migration laws.In this paper,combined with self-affine property of surface geometries and spatial configuration of cleats,an algorithm representing cleat networks is developed based on the Weier-strass-Mandelbrot ( W-M) function The fluid flow in cleat network was simulated at pore scale by Lattice Boltz-mann method ( LBM) and its permeability was calculated correspondingly.The results show that without butt cleats,the permeability of cleat networks follows the triple-effect fractal fracture-permeability model.After butt cleats being introduced,the Hurst exponent,the aperture of butt cleats and face cleats all affect the permeabili-ty of reservoir.The permeability increases with the increases of Hurst exponent and the aperture of butt cleats. However,the permeability of coal reservoir is dominated by spatial configuration and surface geometries of face cleats when the aperture of butt cleats is smaller than that of face cleats.关键词
煤储层/割理网络/LBM/渗透率/自仿射/三效应裂-渗模型Key words
coal reservoir/ cleat network/ LBM/ permeability/ self-affinity/ triple-effect fracture-permeability model分类
天文与地球科学引用本文复制引用
金毅,李辉,平瑞,牛永斌,张翔宇..自仿射割理网络表征及流体渗流LBM模拟[J].河南理工大学学报（自然科学版）,2018,37(4):55-60,6.基金项目
国家自然科学基金资助项目(41472128,41772104) （41472128,41772104）
山西省煤层气联合基金资助项目 (2012012002,2015012010) （2012012002,2015012010）
河南省高校科技创新人才项目(16HASTIT023) （16HASTIT023）
河南省高校科技创新团队项目(17IRTSTHN025) （17IRTSTHN025）
