Zhe Zhou*, Meiyu Sheng, Zhaolong Ge, Shihui Gong, Qisi Huai, Junhui Mou and Fan Wang,
{"title":"剪切滑移过程中烟煤断裂的渗透性演变","authors":"Zhe Zhou*, Meiyu Sheng, Zhaolong Ge, Shihui Gong, Qisi Huai, Junhui Mou and Fan Wang, ","doi":"10.1021/acs.energyfuels.4c0149510.1021/acs.energyfuels.4c01495","DOIUrl":null,"url":null,"abstract":"<p >The method of enhancing reservoir permeability through volumetric fracturing to create a complex seam network presents a novel approach for extracting coalbed methane. Coal rock joint fractures exhibit low strength, and comprehending the permeability evolution during fracture shear slip is crucial for evaluating the viability of coal bed fracturing and forecasting coal bed methane production capacity. Hence, this study focuses on bituminous coals with varying ash contents in the Ordos Basin to investigate the permeability evolution during fracture shear slip through shear seepage experiments. By analysis of the mineral components of bituminous coals and the three-dimensional morphology changes of fracture surfaces before and after slip, the permeability evolution mechanism of bituminous coal fractures is elucidated. The results show that the permeability of bituminous coal fractures decreases during shear slip, with reductions ranging from 12.89 to 93.65%. On average, the permeability decrease for the three types of bituminous coals is 88.45, 22.63, and 52.24%, respectively. Furthermore, the decrease in permeability of bituminous coal increases with the rise in the laminated silicate content during shear slip. Bituminous coal A, characterized by weaker mechanical properties, experienced an average permeability change of −5.93% during sudden slip rate alterations, significantly higher than that of bituminous coal B (0.59%) and bituminous coal C (−2.59%). Bituminous fractures with weaker mechanical properties and higher laminated silicate content exhibited greater damage under shear stress, resulting in an increased permeability drop.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"38 17","pages":"16189–16201 16189–16201"},"PeriodicalIF":5.3000,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Permeability Evolution of Bituminous Coal Fractures during the Shear Slip Process\",\"authors\":\"Zhe Zhou*, Meiyu Sheng, Zhaolong Ge, Shihui Gong, Qisi Huai, Junhui Mou and Fan Wang, \",\"doi\":\"10.1021/acs.energyfuels.4c0149510.1021/acs.energyfuels.4c01495\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >The method of enhancing reservoir permeability through volumetric fracturing to create a complex seam network presents a novel approach for extracting coalbed methane. Coal rock joint fractures exhibit low strength, and comprehending the permeability evolution during fracture shear slip is crucial for evaluating the viability of coal bed fracturing and forecasting coal bed methane production capacity. Hence, this study focuses on bituminous coals with varying ash contents in the Ordos Basin to investigate the permeability evolution during fracture shear slip through shear seepage experiments. By analysis of the mineral components of bituminous coals and the three-dimensional morphology changes of fracture surfaces before and after slip, the permeability evolution mechanism of bituminous coal fractures is elucidated. The results show that the permeability of bituminous coal fractures decreases during shear slip, with reductions ranging from 12.89 to 93.65%. On average, the permeability decrease for the three types of bituminous coals is 88.45, 22.63, and 52.24%, respectively. Furthermore, the decrease in permeability of bituminous coal increases with the rise in the laminated silicate content during shear slip. Bituminous coal A, characterized by weaker mechanical properties, experienced an average permeability change of −5.93% during sudden slip rate alterations, significantly higher than that of bituminous coal B (0.59%) and bituminous coal C (−2.59%). Bituminous fractures with weaker mechanical properties and higher laminated silicate content exhibited greater damage under shear stress, resulting in an increased permeability drop.</p>\",\"PeriodicalId\":35,\"journal\":{\"name\":\"Energy & Fuels\",\"volume\":\"38 17\",\"pages\":\"16189–16201 16189–16201\"},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-08-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Energy & Fuels\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acs.energyfuels.4c01495\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy & Fuels","FirstCategoryId":"5","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.energyfuels.4c01495","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Permeability Evolution of Bituminous Coal Fractures during the Shear Slip Process
The method of enhancing reservoir permeability through volumetric fracturing to create a complex seam network presents a novel approach for extracting coalbed methane. Coal rock joint fractures exhibit low strength, and comprehending the permeability evolution during fracture shear slip is crucial for evaluating the viability of coal bed fracturing and forecasting coal bed methane production capacity. Hence, this study focuses on bituminous coals with varying ash contents in the Ordos Basin to investigate the permeability evolution during fracture shear slip through shear seepage experiments. By analysis of the mineral components of bituminous coals and the three-dimensional morphology changes of fracture surfaces before and after slip, the permeability evolution mechanism of bituminous coal fractures is elucidated. The results show that the permeability of bituminous coal fractures decreases during shear slip, with reductions ranging from 12.89 to 93.65%. On average, the permeability decrease for the three types of bituminous coals is 88.45, 22.63, and 52.24%, respectively. Furthermore, the decrease in permeability of bituminous coal increases with the rise in the laminated silicate content during shear slip. Bituminous coal A, characterized by weaker mechanical properties, experienced an average permeability change of −5.93% during sudden slip rate alterations, significantly higher than that of bituminous coal B (0.59%) and bituminous coal C (−2.59%). Bituminous fractures with weaker mechanical properties and higher laminated silicate content exhibited greater damage under shear stress, resulting in an increased permeability drop.
期刊介绍:
Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.