Brittleness Evolution of Different Rank Coals under the Effects of Cyclic Liquid CO2 during the Coalbed Methane Recovery Process

2021 ◽  
Author(s):  
Jizhao Xu ◽  
Cheng Zhai ◽  
Shuxun Sang ◽  
P.G. Ranjith ◽  
Xu Yu ◽  
...  
Keyword(s):  
Coalbed Methane ◽  
Recovery Process ◽  
Methane Recovery ◽  
Liquid Co2

Mechanical responses of coals under the effects of cyclical liquid CO2 during coalbed methane recovery process

Fuel ◽  
2022 ◽  
Vol 308 ◽  
pp. 121890
Author(s):  
Jizhao Xu ◽  
Cheng Zhai ◽  
P.G. Ranjith ◽  
Shuxun Sang ◽  
Xu Yu ◽  
...  
Keyword(s):  
Coalbed Methane ◽  
Recovery Process ◽  
Methane Recovery ◽  
Mechanical Responses ◽  
Liquid Co2

scholarly journals Research on the Processes of Injecting CO2 into Coal Seams with CH4 Recovery Using Horizontal Wells

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 416 ◽  
Author(s):  
Jarosław Chećko ◽  
Tomasz Urych ◽  
Małgorzata Magdziarczyk ◽  
Adam Smolinski
Keyword(s):  
Carbon Dioxide ◽  
Coalbed Methane ◽  
Recovery Process ◽  
Coal Bed ◽  
Structural Parameter ◽  
Storage Site ◽  
Coal Seams ◽  
Methane Recovery ◽  
Enhanced Coalbed Methane Recovery ◽  
Research Activities

The paper presents a research study on modeling and computer simulation of injecting CO2 into the coal seams of the Upper Silesian Coal Basin, Poland connected with enhanced coal bed methane (ECBM) recovery. In the initial stage of the research activities, a structural parameter model was developed specifically with reference to the coal-bearing formations of the Upper Carboniferous for which basic parameters of coal quality and the distribution of methane content were estimated. In addition, a lithological model of the overall reservoir structure was developed and the reservoir parameters of the storage site were analyzed. In the next stage of the research, the static model was supplemented with detailed reservoir parameters as well as the thermodynamic properties of fluids and complex gases. The paper discusses a series of simulations of an enhanced coalbed methane recovery process with a simultaneous injection of carbon dioxide. The analyses were performed using the ECLIPSE software designed for simulating coal seam processes. The results of the simulations demonstrated that the total volume of CO2 injected to a designated seam in a coal mine during the period of one year equaled 1,954,213 sm3. The total amount of water obtained from the production wells during the whole period of the simulations (6.5 years) was 9867 sm3. At the same time, 15,558,906 sm3 of gas was recovered, out of which 14,445,424 sm3 was methane. The remaining 7% of the extracted gas was carbon dioxide as a result of reverse production of the previously injected CO2. However, taking into consideration the phenomena of coal matrix shrinking and swelling, the total amount of injected CO2 decreased to approximately 625,000 sm3.

Liquid CO2 injection to enhance coalbed methane recovery: An experiment and in-situ application test

Fuel ◽  
2021 ◽  
Vol 284 ◽  
pp. 119043 ◽  
Author(s):  
Gaoming Wei ◽  
Hu Wen ◽  
Jun Deng ◽  
Li Ma ◽  
Zhenbao Li ◽  
...  
Keyword(s):  
Coalbed Methane ◽  
Co2 Injection ◽  
Methane Recovery ◽  
Liquid Co2

Pore variation of three different metamorphic coals by multiple freezing-thawing cycles of liquid CO2 injection for coalbed methane recovery

Fuel ◽  
2017 ◽  
Vol 208 ◽  
pp. 41-51 ◽  
Author(s):  
Jizhao Xu ◽  
Cheng Zhai ◽  
Shimin Liu ◽  
Lei Qin ◽  
Shangjian Wu
Keyword(s):  
Coalbed Methane ◽  
Co2 Injection ◽  
Methane Recovery ◽  
Liquid Co2

A Review on Recent Advances in the Numerical Simulation for Coalbed-Methane-Recovery Process

2007 ◽  
Vol 10 (06) ◽  
pp. 657-666 ◽  
Author(s):  
Xiaorong R. Wei ◽  
Guoxiong X. Wang ◽  
Paul Massarotto ◽  
Sue D. Golding ◽  
Victor Rudolph
Keyword(s):  
Numerical Simulation ◽  
Coalbed Methane ◽  
Recovery Process ◽  
Methane Recovery ◽  
Recent Advances

Investigation of the mechanical damage of low rank coals under the impacts of cyclical liquid CO2 for coalbed methane recovery

Energy ◽  
2021 ◽  
pp. 122145
Author(s):  
Jizhao Xu ◽  
Cheng Zhai ◽  
Pathegama Gamage Ranjith ◽  
Shuxun Sang ◽  
Yong Sun ◽  
...  
Keyword(s):  
Coalbed Methane ◽  
Mechanical Damage ◽  
Low Rank ◽  
Methane Recovery ◽  
Liquid Co2 ◽  
Low Rank Coals

scholarly journals Fracturing in coals with different fluids: an experimental comparison between water, liquid CO2, and supercritical CO2

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jianfeng Yang ◽  
Haojie Lian ◽  
Li Li
Keyword(s):  
Coalbed Methane ◽  
Experimental Results ◽  
Propagation Path ◽  
Experimental Comparison ◽  
Single Fracture ◽  
Methane Recovery ◽  
Fracturing Fluids ◽  
Liquid Co2 ◽  
Before And After ◽  
Fracture Apertures

Abstract The present work conducted laboratory experiments of fracturing in fat coals, anthracites, and mudstones. Three different fluids were selected as the fracturing fluids, including water, liquid CO2 (L-CO2), and supercritical CO2 (Sc-CO2). The resulting fracture morphologies and fracture apertures of the coal specimens were investigated using 3D morphological scanning, and the permeabilities of the samples were measured before and after fracturing. The experimental results showed that the breakdown pressures of Sc-CO2 fracturing were the lowest among the three fracturing fluids, and the average single fracture apertures of the ScCO2-induced cracks were the smallest amongst the three fracturing fluids. In addition, the number of cracks and the roughness coefficients induced by Sc-CO2 fracturing were larger than those caused by water and liquid CO2. The viscosity of the fracturing fluid and the capillary effect are key factors that affect the crack propagation path and fracture surface topography. The results suggest that Sc-CO2 has the largest diffusion length, and thus is capable of permeating the coal matrix through small pores and causing more extensive fractures. Additionally, the effective hydraulic apertures of coal specimens produced by Sc-CO2 fracturing were wider than those induced by water and liquid CO2. The experimental results indicate that Sc-CO2 fracturing has huge potential to enhance coalbed methane recovery.

Enhancing coalbed methane recovery with liquid CO2 fracturing in underground coal mine: From experiment to field application

Fuel ◽  
2020 ◽  
pp. 119793
Author(s):  
Shixing Fan ◽  
Duo Zhang ◽  
Hu Wen ◽  
Xiaojiao Cheng ◽  
Xiangrong Liu ◽  
...  
Keyword(s):  
Coal Mine ◽  
Coalbed Methane ◽  
Field Application ◽  
Methane Recovery ◽  
Underground Coal Mine ◽  
Liquid Co2

Experimental investigation of BLEVE in liquid CO2 phase-transition blasting for enhanced coalbed methane recovery

Fuel ◽  
2021 ◽  
Vol 292 ◽  
pp. 120283
Author(s):  
Zheng Shang ◽  
Haifeng Wang ◽  
Bing Li ◽  
Congmeng Hao ◽  
zhengyang Wang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Experimental Investigation ◽  
Coalbed Methane ◽  
Methane Recovery ◽  
Enhanced Coalbed Methane Recovery ◽  
Liquid Co2 ◽  
Enhanced Coalbed Methane
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