摘要
以樊庄-郑庄区块无烟煤储层为研究对象,基于气水渗透率测试及核磁共振成像试验,对煤储层气水赋存-运移-产出路径及其模式开展了研究。结果表明:孔径<1μm的大孔和显微裂隙中赋存的煤层水主要为不可流动水;外生裂隙、内生裂隙与显微裂隙共同组成了煤层水的运移和产出通道,并以裂口宽度>10μm的裂隙为主;微孔和中孔是煤层气的主要赋存空间,中孔、显微裂隙和内生裂隙是煤层气运移产出的主要通道,对煤层气运移和产出至关重要;其中樊庄-郑庄区块煤储层孔径>0.5μm的孔隙和显微裂隙发育程度相对较弱,制约了气体产出效果。
Taking the anthracite coal in Fanzhuang and Zhengzhuang blocks as the research object,the occurrence,migration and output path of gas and water in coal reservoir and its model were analyzed based on the permeability and nuclear magnetic resonance imaging experiments.The results show that the coal seam water in macropore and microscopic fracture with the pore diameter<1μm is mainly non-mobile water;exogenous fracture,endogenous fracture and microscopic fracture co-constitute the migration and output path of coal seam water,especially the fracture with the width>10μm;micropore and mesopore are the main occurrence spaces of CBM,and mesopore,microfracture and endogenous fracture are the main channels for migration and output of CBM,which are very important for migration and production of CBM.Among them,the development of pore and microfracture with the pore diameter>0.5μm in coal reservoir of Fanzhuang and Zhengzhuang blocks is relatively weak,which restricts the gas production effect.
作者
胡秋嘉
刘世奇
闫玲
王鹤
方辉煌
张庆
毛崇昊
贾慧敏
HU Qiujia;LIU Shiqi;YAN Ling;WANG He;FANG Huihuang;ZHANG Qing;MAO Chonghao;JIA Huiming(PetroChina Shanxi CBM Branch,Changzhi 046000,China;Low Carbon Energy Institute,China University of Mining and Technology,Xuzhou 221008,China;School of Mineral Resource and Geoscience,China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤矿安全》
CAS
北大核心
2020年第10期218-222,共5页
Safety in Coal Mines
基金
中国石油天然气股份有限公司重大科技专项资助项目(2017E-1405)
国家自然科学基金资助项目(41972168)。
关键词
裂隙
孔隙
渗透率
核磁共振成像
沁水盆地南部
fracture
pore
permeability
nuclear magnetic resonance imaging
southern Qinshui Basin
