Results 41 to 50 of about 6,194 (127)

Investigation of the controlling rock petrophysical factors on water phase trapping damage in tight gas reservoirs

Energy Science & Engineering, 2020
This paper presents an investigation into the effect of rock physical parameters on water phase trapping (WPT) damage in tight gas reservoirs. The investigation involved water imbibition and drainage experiments that were performed to simulate the WPT ...
Jian Tian, Yili Kang, Na Jia, Pingya Luo, Lijun You   +4 more
doaj   +1 more source

A novel model for predicting the productivity index of horizontal/vertical wells based on Darcy's law, drainage radius, and flow convergence

Heliyon
The Productivity Index (PI) of oil wells is essential to developing a field's production plan, and previous studies report different models for predicting the PI of horizontal or vertical wells. However, predicting the PI of horizontal and vertical wells
Roland I. Nwonodi
doaj   +1 more source

Time Characteristics of the Influence Radius by Injecting N2 to Displace Coalbed Methane: A Case Study

Geofluids, 2019
Injecting N2 to displace methane is an effective way to enhance coalbed methane drainage, and the influence radius of this process is an important factor in borehole arrangement.
Chen Li-wei, Yang Tian-hong, Yang Hong-min, Wang Li-guo   +3 more
doaj   +1 more source

Double Unloading Gas Control Technology for Fracturing Soft Coal Seams in Overlying Key Strata

Applied Sciences
Based on the ‘three highs and one low’ geological conditions of high gas pressure, high gas content, high ground stress, and low permeability in deep coal seams, this study proposes a dual method of hydraulic fracturing of key layers of overlying rock ...
Jun Xie, Feng Li, Zhengxu Yan, Jingjing Huo   +3 more
doaj   +1 more source

Evaluation of gas drainage and coal permeability improvement with liquid CO gasification blasting

Advances in Mechanical Engineering, 2018
With the increasing mining depths of underground coal mines, gas drainage and coal permeability improvement with conventional coal seam fracture stimulating methods have shown some deficiencies.
Jianhong Kang, Fubao Zhou, Ziying Qiang, Shuangjiang Zhu   +3 more
doaj   +1 more source

Liquid CO phase transition fracturing technology and its application in enhancing gas drainage of coal mines

Adsorption Science & Technology, 2020
Liquid CO 2 phase transition fracturing (LCO 2 -PTF) is an effective and economical technology used to improve the permeability of rock and coal. In this study, the working mechanisms of LCO 2 -PTF were analysed and relevant equipment was designed to ...
Yingchun Fan, Botao Qin, Qun Zhou, Quanlin Shi, Dong Ma, Jiahao Wu   +5 more
doaj   +1 more source

A study on the technology of enhancing gas permeability and gas drainage by sectional hydraulic fracturing in directional long boreholes: a case study of the no. 8 coal seam in baode coal mine

Frontiers in Earth Science
Aiming at the technical problem of low efficiency of gas drainage in high-gas and low-permeability coal seams in China, this paper takes the No. 8 coal seam in Baode Coal Mine as the engineering background and conducts a study on the technology of ...
Zenghui Zhang, Jinlin Qiao, Sen Yang, Kaige Zheng, Di Zhang, Jian Zhang   +5 more
doaj   +1 more source

Numerical simulation on gas drainage and borehole arrangement parameters of bedding borehole in a coal mine

Gong-kuang zidonghua, 2018
Based on comprehensive consideration of gas flow inertia and slippage effect, a gas drainage flow model was established. Based on engineering background of 12150 coal face of the No.15 coal seam in Songhe Coal Mine, the distribution law of gas pressure ...
ZHANG Bo, XIE Xionggang, XU Shiqing
doaj   +1 more source

Well Pattern Optimization for Gas Reservoir Compressed Air Energy Storage Considering Multifactor Constraints

Energies
As an effective energy storage solution, gas reservoir compressed air energy storage (CAES) can efficiently utilize curtailed wind power to meet urban electricity demands.
Ming Yue, Chaoran Wei, Mingqi Jia, Kun Dai, Weiyao Zhu, Hongqing Song   +5 more
doaj   +1 more source

Optimization and Application of Drilling Parameters Based on Gas–Solid Coupling Simulation

Applied Sciences
The layout of directional high-level long boreholes in fracture zones for extracting pressure-relieved gas from goaf is a key technology to address the gas concentration exceedance in upper corners.
Zhiguo Ge, Guochao Yan, Shaoqi Kong, Baodong Zong, Huizhi Liu, Jinjing Huang, Gaochuan Guo   +6 more
doaj   +1 more source