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Rock Mechanics Bulletin 2024年第2期3卷 1-20页

作者： Cun Zhang Yanhong Chen Zhaopeng Ren Fangtian Wang School of Energy and Mining Engineering China University of Mining and Technology(Beijing)Beijing 100083China Engineering Research Center of Green and Intelligent Mining for Thick Coal Seam Ministry of EducationBeijing 100083China School of Mines China University of Mining&TechnologyXuzhou221116China

Broken coal and rock(BCR)are an important component medium of the caving zone in the goaf(or gob),as well as the main filling material of fault fracture zone and collapse *** compaction seepage characteristics of BCR directly affect the safe and efficient mining of coal ***,numerous laboratory studies have focused on the compaction seepage characteristics of *** paper first outlines the engineering problems involved in the BCR during coal mining including the air leakage,the spontaneous combustion,the gas drainage,and the un-derground reservoirs in the *** inrush related to tectonics such as faults and collapse columns and surface subsidence related to coal gangue filling and mining also involve the compaction seepage characteristics of *** on the field problems of BCR,many attempts have been made to mimic field environments in laboratory *** experimental equipment(cavity size and shape,acoustic emission,CT,etc.)and experimental design for the BCR were firstly *** main objects of laboratory analysis can be divided into compression tests and seepage *** the compaction test,the main research focuses on the bearing deformation characteristics(stress-strain curve),pore evolution characteristics,and re-crushing characteristics of *** seepage test mainly uses gas or water as the main medium to study the evolution characteristics of permeability under different compaction stress *** the laboratory tests,factors such as the type of coal and rock mass,particle size,particle shape,water pressure,temperature,and stress path are usually *** lateral compression test of BCR can be divided into three stages,including the self-adjustment stage,the broken stage,and the elastic stage or stable *** each stage,stress,deformation,porosity,energy,particle size and breakage rate all have their own *** test regarding the water permeability experiment of BCR is actually belong to variabl

关键词： Coal mining Broken coal and rock Laboratory test Engineering problems Experimental equipment Breakage characteristics Compaction characteristics seepage characteristics

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Determination of microscopic waterflooding characteristics and influence factors in ultra-low permeability sandstone reservoir

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Journal of Central South University 2017年第9期24卷 2134-2144页

作者：任大忠孙卫黄海南珺祥陈斌 State Key Laboratory of Continental Dynamics Northwest UniversityXi'an 710069China Department of Petroleum Engineering Xi'an Shiyou UniversityXi'an 710065China National Engineering Laboratory of Low Permeability Oilfield Exploration and Development Xi'an 710018China

Actual sandstone micromodel was used in this work to conduct the microscopic waterflooding experiment of ultra-low sandstone reservoir,since the inside seepage characteristics of microscopic waterflooding process of Chang 8 ultra-low permeability sandstone reservoir of Upper Triassic Yanchang formation in Huaqing region of the Ordos Basin,China is difficult to observe *** with physical property,casting thin sections,constant-rate mercury injection capillary pressure and nuclear magnetic resonance,the influence of reservoir property on the waterflooding characteristics in pores were analyzed and *** paths of waterflooding characteristics were divided into four types:homogeneous seepage,reticular-homogeneous seepage,finger-reticular seepage and finger-like seepage,the waterflooding efficiency of which decreases in *** than 70%of residual oil occurs as flowing-around seepage and oil *** property,pore structure and movable fluid characteristics are all controlled by digenesis and their impacts on waterflooding efficiency are in ***,the pore throat radius size and distribution and movable fluid percentage are closely related to waterflooding law.

关键词： waterflooding seepage characteristics reservoir characteristics ultra-low permeability sandstone reservoir Ordos basin

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A novel pore-fracture dual network modeling method considering dynamic cracking and its applications

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Petroleum Research 2020年第2期5卷 164-169页

作者： Yukun Chen Kai Yan Jigang Zhang Runxi Leng Hongjie Cheng Xuhui Zhang Hongxian Liu Weifeng Lyu PetroChina Xinjiang Oilfield Research Institute of Exploration and DevelopmentKaramayXinjiang843000China College of Mechanical and Transportation Engineering China University of Petroleum(Beijing)Beijing102249China Institute of Mechanics Chinese Academy of SciencesBeijing100190China Department of Petroleum Engineering China University of Petroleum-Beijing at KaramayKaramayXinjiang834000China State Key Laboratory of Enhance Oil Recovery Research Institute of Petroleum Exploration and DevelopmentPetroChinaBeijing100083China

Unconventional reservoirs are normally characterized by dual porous media, which has both multi-scalepore and fracture structures, such as low permeability or tight oil reservoirs. The seepage characteristicsof such reservoirs is mainly determined by micro-fractures, but conventional laboratory experimentalmethods are difficult to measure it, which is attribute to the dynamic cracking of these *** emerging digital core technology in recent years can solve this problem by developing an accuratepore network model and a rational simulation approach. In this study, a novel pore-fracture dualnetwork model was established based on percolation theory. Fluid flow in the pore of two scales, microfracture and matrix pore, were considered, also with the impact of micro-fracture opening and closingduring flow. Some seepage characteristic parameters, such as fluid saturations, capillary pressure, relative permeabilities, displacement efficiency in different flow stage, can be predicted by proposedcalculating method. Through these work, seepage characteristics of dual porous media can be achieved.

关键词： Pore-fracture dual network model Micro-fracture Dynamic cracking Digital core Dimensionless parameters seepage characteristics

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A DATA-BASE SYSTEM FOR seepage CHARACTERISTIES OF INTACT ROCKS DISCONTINUITIES AND ROCK MASSES

A DATA-BASE SYSTEM FOR SEEPAGE CHARACTERISTIES OF INTACT ROC...

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岩石力学与环境岩土工程国际会议

作者： Hasan PIRTI mer AYDAN Sakarya University AdapaznTurkey Tokai University Shimizu 424 Japan

＜正＞Fluid flow through intact rock,discontinuities and rock mass is of great concern as it plays an important role in many engineering applications such as dam,underground storage for oil,water,nuclear waste disposals ***,information on seepage characteristics of rock mass is necessary for assessing fluid transport and its mechanical *** this paper,the authors describe an integrated data-base system for seepage characteristics of intact rocks,discontinuities and rock *** data-base system is used to study interrelations between permeability and pore diameter,porosity, discontinuity aperture,RQD and confining pressure and to check the validity of theoretical relations.

关键词： seepage characteristics data-base permeability rock

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