Numerical Simulation the Supercritical CO2 Sequestration in Shale Gas Reservoir with Enhanced Gas Recovery

2020 ◽  
Author(s):  
Yulong Zhao ◽  
Liehui Zhang ◽  
Ruihan Zhang ◽  
Shengnan Chen ◽  
Yu Pang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Shale Gas ◽  
Supercritical Co2 ◽  
Co2 Sequestration ◽  
Gas Reservoir ◽  
Enhanced Gas Recovery ◽  
Gas Recovery ◽  
Shale Gas Reservoir

scholarly journals Research progress and prospects of CO2 enhanced shale gas recovery and geologic sequestration

2018 ◽  
Vol 53 ◽  
pp. 04002
Author(s):  
Rong Chen ◽  
GuoHui Zhang ◽  
ChengGao Yi
Keyword(s):  
Numerical Simulation ◽  
Shale Gas ◽  
Carbonic Acid ◽  
Research Progress ◽  
Geologic Sequestration ◽  
Affecting Factors ◽  
Gas Reservoir ◽  
Shale Formations ◽  
Gas Recovery ◽  
Shale Gas Reservoir

CO2 injection to strengthen shale gas development is a new technology to improve shale gas recovery and realize geologic sequestration. Many scholars have studied these aspects of this technology: mechanism of CO2 displacement CH4, CO2 and CH4 adsorption capacity, affecting factors of shale adsorption CO2, CO2 displacement numerical simulation, and supercritical CO2 flooding CH4 advantages. Research shows that CO2 can exchange CH4 in shale formations, improve shale gas recovery, on the other hand shale formations is suitable for CO2 sequestration because shale gas reservoir is compact. The supercritical CO2 has advantages such as large fluid diffusion coefficient, CO2 dissolution in water to form carbonic acid that can effectively improve the formation pore permeability etc., so the displacement efficiency of supercritical CO2 is high. But at present the technology study mainly focus on laboratory and numerical simulation, there is still a big gap to industrial application, need to study combined effect of influence factors, suitable CO2 injection parameter in different shale gas reservoir, CO2 injection risk and solutions etc.

Influence of supercritical CO2 exposure on water wettability of shale: Implications for CO2 sequestration and shale gas recovery

Energy ◽  
2021 ◽  
pp. 122551
Author(s):  
Chao Qin ◽  
Yongdong Jiang ◽  
Junping Zhou ◽  
Shuangying Zuo ◽  
Shiwan Chen ◽  
...  
Keyword(s):  
Shale Gas ◽  
Supercritical Co2 ◽  
Co2 Sequestration ◽  
Gas Recovery ◽  
Water Wettability

Numerical Simulation for Shale Gas Flow in Complex Fracture System of Fractured Horizontal Well

2018 ◽  
Vol 19 (3-4) ◽  
pp. 367-377 ◽  
Author(s):  
Yingzhong Yuan ◽  
Wende Yan ◽  
Fengbo Chen ◽  
Jiqiang Li ◽  
Qianhua Xiao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Shale Gas ◽  
Horizontal Well ◽  
Fracture Network ◽  
Gas Reservoir ◽  
Complex Fracture ◽  
Shale Gas Reservoir ◽  
Fracture Parameters ◽  
Fracture Systems ◽  
Fractured Horizontal Well

AbstractComplex fracture systems including natural fractures and hydraulic fractures exist in shale gas reservoir with fractured horizontal well development. The flow of shale gas is a multi-scale flow process from microscopic nanometer pores to macroscopic large fractures. Due to the complexity of seepage mechanism and fracture parameters, it is difficult to realize fine numerical simulation for fractured horizontal wells in shale gas reservoirs. Mechanisms of adsorption–desorption on the surface of shale pores, slippage and Knudsen diffusion in the nanometer pores, Darcy and non-Darcy seepage in the matrix block and fractures are considered comprehensively in this paper. Through fine description of the complex fracture systems after horizontal well fracturing in shale gas reservoir, the problems of conventional corner point grids which are inflexible, directional, difficult to geometrically discretize arbitrarily oriented fractures are overcome. Discrete fracture network model based on unstructured perpendicular bisection grids is built in the numerical simulation. The results indicate that the discrete fracture network model can accurately describe fracture parameters including length, azimuth and density, and that the influences of fracture parameters on development effect of fractured horizontal well can be finely simulated. Cumulative production rate of shale gas is positively related to fracture half-length, fracture segments and fracture conductivity. When total fracture length is constant, fracturing effect is better if single fracture half-length or penetration ratio is relatively large and fracturing segments are moderate. Research results provide theoretical support for optimal design of fractured horizontal well in shale gas reservoir.

Investigation of CO2–CH4 Displacement and Transport in Shale for Enhanced Shale Gas Recovery and CO2 Sequestration

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Xi-Dong Du ◽  
Min Gu ◽  
Shuo Duan ◽  
Xue-Fu Xian
Keyword(s):  
Shale Gas ◽  
Co2 Storage ◽  
Fixed Bed ◽  
Co2 Injection ◽  
Gas Reservoir ◽  
Co2 Gas ◽  
Gas Recovery ◽  
Shale Gas Reservoir ◽  
Shale Reservoir ◽  
Adsorption Amount

To gain a better understanding of the enhanced shale gas recovery by CO2 gas injection (CO2-ESGR) technique, the dynamic displacement mechanism of CO2–CH4, the CO2 enhanced shale gas recovery (RCH4), and CO2 storage capacity (VCO2) were studied based on transport properties of CO2 and CH4. Experiments of CO2 injection into shale gas reservoir preadsorbed by CH4 were performed in a fixed bed. Breakthrough curves were obtained under different test conditions and simulated by one-dimension advection-dispersion (AD) model. It was found that dispersion coefficient (K1) rather than molecular diffusivity of CO2 dominated its transport in shale. K1 together with advection velocity (υ) of CO2 during CH4 displacement controls RCH4 and VCO2. When transporting in shale gas reservoir, CO2 had larger dynamic adsorption amount and υ, but smaller K1 than CH4. The competitive transport and adsorption behavior of CO2 and CH4 made it possible for CO2 to store in shale reservoir and to drive the in-place CH4 out of shale reservoir. The transfer zone of CO2–CH4 displacement (CCD) was very wide. High RCH4 and VCO2 were reached at low injection CO2 gas pressure and for small shale particles. Higher injection flow rates of CO2 and temperatures ranging from 298 K to 338 K had a little effect on RCH4 and VCO2. For field conditions, high CO2 injection pressure has to be used because the pore pressure of shale reservoir and adsorption amount of CH4 increase with the increase in depth of shale gas reservoir, but RCH4 is still not high.

scholarly journals Experimental and numerical simulation of water adsorption and diffusion in shale gas reservoir rocks

2019 ◽  
Vol 3 (2) ◽  
pp. 165-174 ◽  
Author(s):  
Weijun Shen ◽  
Xizhe Li ◽  
Abdullah Cihan ◽  
Xiaobing Lu ◽  
Xiaohua Liu
Keyword(s):  
Numerical Simulation ◽  
Shale Gas ◽  
Water Adsorption ◽  
Gas Reservoir ◽  
Reservoir Rocks ◽  
Shale Gas Reservoir ◽  
And Diffusion

CO2 sequestration coupled with enhanced gas recovery in shale gas reservoirs

2019 ◽  
Vol 34 ◽  
pp. 646-655 ◽  
Author(s):  
Erfan Mohagheghian ◽  
Hassan Hassanzadeh ◽  
Zhangxin Chen
Keyword(s):  
Shale Gas ◽  
Co2 Sequestration ◽  
Gas Reservoirs ◽  
Enhanced Gas Recovery ◽  
Gas Recovery ◽  
Shale Gas Reservoirs

The numerical simulation of thermal recovery considering rock deformation in shale gas reservoir

2019 ◽  
Vol 138 ◽  
pp. 719-728 ◽  
Author(s):  
Jianwei Yuan ◽  
Ruizhong Jiang ◽  
Yongzheng Cui ◽  
Jianchun Xu ◽  
Qiong Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Shale Gas ◽  
Thermal Recovery ◽  
Rock Deformation ◽  
Gas Reservoir ◽  
Shale Gas Reservoir
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