scholarly journals Simulation Study of CO2-EOR in Tight Oil Reservoirs with Complex Fracture Geometries

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Pavel Zuloaga-Molero ◽  
Wei Yu ◽  
Yifei Xu ◽  
Kamy Sepehrnoori ◽  
Baozhen Li
Keyword(s):  
Simulation Study ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Complex Fracture ◽  
Co2 Eor ◽  
Tight Oil Reservoirs

Semi-analytical model of the transient pressure behavior of complex fracture networks in tight oil reservoirs

2016 ◽  
Vol 35 ◽  
pp. 497-508 ◽  
Author(s):  
Ren Zongxiao ◽  
Wu Xiaodong ◽  
Liu Dandan ◽  
Ray Rui ◽  
Guo Wei ◽  
...  
Keyword(s):  
Analytical Model ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Fracture Networks ◽  
Transient Pressure ◽  
Pressure Behavior ◽  
Complex Fracture ◽  
Tight Oil Reservoirs

scholarly journals Simulation study of relative permeability and the dynamic capillarity of waterflooding in tight oil reservoirs

2020 ◽  
Vol 10 (5) ◽  
pp. 1891-1896 ◽  
Author(s):  
Rashid S. Mohammad ◽  
Mohammad Yaqoob Khan Tareen ◽  
Abdullah Mengel ◽  
Syed Ali Raza Shah ◽  
Javid Iqbal
Keyword(s):  
Relative Permeability ◽  
Simulation Study ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Tight Oil Reservoirs ◽  
Dynamic Capillarity

Natural gas-based EOR versus CO2-EOR in shale and tight oil reservoirs

2020 ◽  
pp. 65-85
Author(s):  
Dheiaa Alfarge ◽  
Mingzhen Wei ◽  
Baojun Bai
Keyword(s):  
Natural Gas ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Co2 Eor ◽  
Tight Oil Reservoirs

Modeling tracer flowback in tight oil reservoirs with complex fracture networks

2017 ◽  
Vol 157 ◽  
pp. 1007-1020 ◽  
Author(s):  
Linkai Li ◽  
Hanqiao Jiang ◽  
Junjian Li ◽  
Keliu Wu ◽  
Fanle Meng ◽  
...  
Keyword(s):  
Oil Reservoirs ◽  
Tight Oil ◽  
Fracture Networks ◽  
Complex Fracture ◽  
Tight Oil Reservoirs

scholarly journals Simulation Study of CO2 Huff-n-Puff in Tight Oil Reservoirs Considering Molecular Diffusion and Adsorption

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2136 ◽  
Author(s):  
Yuan Zhang ◽  
Jinghong Hu ◽  
Qi Zhang
Keyword(s):  
Molecular Diffusion ◽  
Co2 Storage ◽  
Oil Production ◽  
Oil Reservoirs ◽  
Co2 Injection ◽  
Tight Oil ◽  
Strong Basis ◽  
Well Production ◽  
Co2 Eor ◽  
Tight Oil Reservoirs

CO2 injection has great potentials to improve the oil production for the fractured tight oil reservoirs. However, Current works mainly focus on its operation processes; full examination of CO2 molecular diffusion and adsorption was still limited in the petroleum industry. To fill this gap, we proposed an efficient method to accurately and comprehensively evaluate the efficiency of CO2-EOR process. We first calculated the confined fluid properties with the nanopore effects. Subsequently, a reservoir simulation model was built based on the experiment test of the Eagle Ford core sample. History matching was performed for the model validation. After that, we examined the effects of adsorption and molecular diffusion on the multi-well production with CO2 injection. Results illustrate that in the CO2-EOR process, the molecular diffusion has a positive impact on the oil production, while adsorption negatively impacts the well production, indicating that the mechanisms should be reasonably incorporated in the simulation analysis. Additionally, simulation results show that the mechanisms of molecular diffusion and adsorption make great contributions to the capacity of CO2 storage in tight formations. This study provides a strong basis to reasonably forecast the long-term production during CO2 Huff-n-Puff process.

scholarly journals Study on Deliverability Evaluation of Staged Fractured Horizontal Wells in Tight Oil Reservoirs

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5857
Author(s):  
Siyu Liu ◽  
Shengchun Xiong ◽  
Dingwei Weng ◽  
Peng Song ◽  
Rou Chen ◽  
...  
Keyword(s):  
Network Structure ◽  
Horizontal Wells ◽  
Fracture Network ◽  
Stress Sensitivity ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Complex Fracture ◽  
Complex Fracture Network ◽  
Tight Oil Reservoirs ◽  
Fractured Horizontal Wells

At present, the existing deliverability evaluation models mainly consider the impact of specific factors on production, and the description of the complex fracture network structure primarily remains at the stage of an ideal dual-pore medium with uniform distribution. However, this cannot reflect the actual fracture network structure and fluid flow law of fractured horizontal wells. Thus, in this paper, a non-uniform fracture network structure is proposed considering the influence of the threshold pressure gradient and stress sensitivity characteristics on the production performance of horizontal wells. The stress sensitivity and the fractal theory are combined to characterize the permeability of the complex fracture network, and a three-zone compound unsteady deliverability model for staged fractured horizontal wells in tight oil reservoirs is successfully developed. Laplace transformation, perturbation theory, and numerical inversion are applied to obtain the semi-analytical solution of the proposed deliverability model. The reliability and accuracy of the analytical solution are verified by the classical tri-linear flow model and an oil field example. The effects of related influential parameters on the production of horizontal wells are analyzed. The deliverability evaluation method proposed in this paper can provide a theoretical basis for formulating rational development technology policies for tight oil reservoirs.

Simulation study of factors affecting CO2 Huff-n-Puff process in tight oil reservoirs

2018 ◽  
Vol 163 ◽  
pp. 264-269 ◽  
Author(s):  
Yuan Zhang ◽  
Wei Yu ◽  
Zhiping Li ◽  
Kamy Sepehrnoori
Keyword(s):  
Simulation Study ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Factors Affecting ◽  
Tight Oil Reservoirs

Simulation Study of CO2 Huff-n-Puff Process in Bakken Tight Oil Reservoirs

2014 ◽  
Author(s):  
Wei Yu ◽  
HamidReza Lashgari ◽  
Kamy Sepehrnoori
Keyword(s):  
Simulation Study ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Tight Oil Reservoirs

scholarly journals Hydrocarbon Gas Flooding Optimization considering Complex Fracture Networks through Numerical Simulation in the Tight Oil Reservoirs

Lithosphere ◽  
2021 ◽  
Vol 2021 (Special 4) ◽  
Author(s):  
Yong Qin ◽  
Haochuan Zhang ◽  
Chang Liu ◽  
Haifeng Ding ◽  
Tianyu Liu ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Gas Injection ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Fracture Networks ◽  
Complex Fracture ◽  
Gas Flooding ◽  
Hydrocarbon Gas ◽  
Tight Oil Reservoirs

Abstract Field data indicates that oil production decline quickly and the oil recovery factor is low due to low permeability and insufficient energy in the tight oil reservoirs. Enhanced oil recovery (EOR) is required to improve the oil production rates of tight oil reservoirs. Gas flooding is a good means to supplement formation energy and improve oil recovery factor, especially for hydrocarbon gas flooding when CO2 is insufficient. Due to the permeability in some areas is too low, the injected gas cannot spread farther, and the EOR performance is poor. So multifractured horizontal well (MFHW) are usually used to assist gas injection in oilfields. At present, there are few studies on the optimization of hydrocarbon gas flooding parameters especially under the complex fracture network. This article uses unstructured grids to characterize the complex fracture networks, which more realistically shows the flow of formation fluids. Based on actual reservoir data, this paper establishes the numerical model of hydrocarbon gas flooding under complex fracture networks. The article conducts numerical simulation to analyze the effect of different parameters on well performance and provides the optimal injection and production parameters for hydrocarbon gas flooding in the M tight oil reservoir. The optimal injection-production well spacing of the M tight oil reservoir is about 800 to 900 m. The EOR performance is better when the total gas injection rates are about 0.45 HCPV, and gas injection rates of each well are about 3000 to 3500 m3/d (0.021 to 0.025 HCPV/a). The recommended injection-production ratio is about 1.1 to 1.2. This work can offer engineers guidance for hydrocarbon gas flooding of the MFHW with complex fracture networks. Hydrocarbon gas flooding in tight oil reservoirs can enhance oil recovery. The findings of this study can help for a better understanding of the influence of different parameters on hydrocarbon gas flooding in the M tight oil reservoir. This work can also offer engineers guidance for hydrocarbon gas flooding of the MFHW with complex fracture networks.

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