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#1Concepción Pla (University of Alicante)H-Index: 8
#2Angel Fernandez-Cortes (UAL: University of Almería)H-Index: 17
Last. David Benavente (University of Alicante)H-Index: 28
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Understanding the fluctuations in cave air concentrations and their climatic control is substantial not only to preserve the quality of indoor atmospheres but also to avoid the risk related to the presence of hazardous substances. In this study, we investigated the most influential factors affecting 222Rn and CO2 concentrations, the nature of their dynamics, and their coupling with climatic variations. For this purpose, we combined a set of mathematical methods that included a statistical and wa...
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#1Daniel KoehnH-Index: 22
#2Sandra Piazolo (University of Leeds)H-Index: 27
Last. Renaud Toussaint (UDS: University of Strasbourg)H-Index: 2
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At the time of energy transition, it is important to be able to predict the effects of fluid overpressures in different geological scenarios as these can lead to the development of hydrofractures and dilating high-porosity zones. In order to develop an understanding of the complexity of the resulting effective stress fields, fracture and failure patterns, and potential fluid drainage, we study the process with a dynamic hydromechanical numerical model. The model simulates the evolution of fluid ...
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#1Jianli Shao (SDUST: Shandong University of Science and Technology)
#2Qi Zhang (Stanford University)
Last. Xianxiang Zhu (Ministry of Science and Technology)
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The influence of rock seepage must be considered in geotechnical engineering, and understanding the fluid flow in rock fractures is of great concern in the seepage effect investigation. This study is aimed at developing a model for inversion of rock fracture domains based on digital images and further study of non-Darcy flow. The visualization model of single rock fracture domain is realized by digital images, which is further used in flow numerical simulation. We further discuss the influence o...
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#1Tianran Ma (CUMT: China University of Mining and Technology)H-Index: 2
#2Hao Xu (LBNL: Lawrence Berkeley National Laboratory)H-Index: 5
Last. Rui Yang (CUMT: China University of Mining and Technology)H-Index: 2
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As a complex two-phase flow in naturally fractured coal formations, the prediction and analysis of CBM production remain challenging. This study presents a discrete fracture approach to modeling coalbed methane (CBM) and water flow in fractured coal reservoirs, particularly the influence of fracture orientation, fracture density, gravity, and fracture skeleton on fluid transport. The discrete fracture model is first verified by two water-flooding cases with multi- and single-fracture configurati...
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#1Guannan Liu (CUMT: China University of Mining and Technology)H-Index: 1
#2Dayu Ye (CUMT: China University of Mining and Technology)H-Index: 1
Last. Jishan Liu (UWA: University of Western Australia)H-Index: 39
view all 4 authors...
In the process of coalbed methane exploitation, the fracture and pore structure is the key problem that affects the permeability of coalbed. At present, the coupling effect of fracture and pore structure and in situ stress is seldom considered in the study of coal seam permeability. In this paper, the fractal seepage model is coupled with coal deformation, and the adsorption expansion effect is considered. A multifield coupling model considering the influence of matrix and fracture structure is ...
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#1Jian Lei (JLU: Jilin University)
#2Baozhi Pan (JLU: Jilin University)H-Index: 4
Last. Lihua Zhang (JLU: Jilin University)H-Index: 2
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Karstic-fault oil pools are a new type of carbonate reservoirs which is consisted of groups of large caves with high oil storage potential. In this study’s examinations of high-yielding wells, it was found that many valuable reservoirs relate to the drilling wells through fractures or karst caves, and it was not possible to determine the reservoir depths through the method of seismic prospecting precisely due to its poor vertical resolution. The conventional logs cannot be run in the case of no ...
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#1Yingli Xia (JLU: Jilin University)H-Index: 3
#2Tianfu Xu (JLU: Jilin University)H-Index: 31
Last. Xin Xin (JLU: Jilin University)H-Index: 4
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Natural gas hydrate is considered as one of the best potential alternative resource to address the world’s energy demand. The available geological data at the Mallik site of Canada indicates the vertical heterogeneities of hydrate reservoir petrophysical properties. According to the logging data and sample analysis results at the Mallik 2L-38 well, a 2D model of geologically descriptive hydrate-bearing sediments was established to investigate the multiphase flow behaviors in hydrate reservoir in...
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#1Dengke Liu (Xi'an Jiaotong University)
#2Zhaolin Gu (Xi'an Jiaotong University)H-Index: 20
Last. Chao Yang
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The pore-throat structures play a dominant role in the evaluation of properties of tight sandstone, but it remains difficult to determine the related parameters and understand their impact on reservoir quality. Hence, toward this end, we analyze the experimental data that are indicative of the pore-throat system, then we investigate the effect of fractal dimensions of pore-throat structures on petrologic and physical properties, and finally, the optical observations, fractal theory, and predicti...
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#1Yanlong Kong (CAS: Chinese Academy of Sciences)H-Index: 11
#2Zhonghe Pang (CAS: Chinese Academy of Sciences)H-Index: 23
Last. Sheng Pan (CAS: Chinese Academy of Sciences)H-Index: 1
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A new significant aspect in the utilization of hydrothermal energy in China is the large-scale exploitation using multiwells from a single geothermal site. This requires detailed hydrogeochemical investigations to gain insight about deep groundwater circulation. At the Xiongxian karst geothermal site in North China, where the demonstration project of large-scale utilization was conducted, 40 boreholes with depths from 1000 to 1800 m were drilled in a region of 50 km2. A total of 25 water samples...
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#1Kai Liu (Northeast Petroleum University)
#2Daiyin Yin (Northeast Petroleum University)
Last. Yong Wang
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The injection-production ratio of ultralow-permeability reservoirs is generally higher in the early stage of development because of the water absorption characteristics of transition layers and mudstone formations. In this paper, the water absorption characteristics of mudstone are experimentally studied, and the empirical function of the water absorption process is established. A new mathematical model of the whole lithology is established by applying the research results of mudstone water abso...
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