Numerical Simulation Study on Surfactant Flooding for Low Permeability Oilfield in the Condition of Threshold Pressure

2008 ◽  
Vol 20 (4) ◽  
pp. 492-498 ◽  
Author(s):  
Dai-yin Yin ◽  
Hui Pu
Keyword(s):  
Numerical Simulation ◽  
Simulation Study ◽  
Low Permeability ◽  
Threshold Pressure ◽  
Surfactant Flooding

Numerical Simulation Study of Daqing Wuzhan Low Permeability Gas Reservoir

2013 ◽  
Vol 385-386 ◽  
pp. 474-477
Author(s):  
Yu Feng Lu ◽  
Min Yang ◽  
San Chuan Li ◽  
Bo Lv
Keyword(s):  
Numerical Simulation ◽  
Simulation Model ◽  
Simulation Study ◽  
Field Data ◽  
Confining Pressure ◽  
Low Permeability ◽  
Production Potential ◽  
Gas Reservoir ◽  
Gas Field ◽  
Porosity And Permeability

Daqing Wuzhan gas field is a deformable low permeability gas filed. Based on the lab study of changing law of porosity and permeability with confining pressure, a numerical simulation model of deformable low permeability gas reservoir is established and is solved by using IMPES method. Comparing with the result of eclipse shows the method is valid. Field example shows the dynamic geological reserves of Wuzhan gas field is low and the new wells should be drilled at the area where there is production potential and larger effective thickness. Comparison of results obtained from different models with field data shows the result considering medium deformation is more reasonable.

scholarly journals Numerical simulation study on CO2 flooding in ultra-low permeability reservoirs

2011 ◽  
Vol 11 ◽  
pp. 1469-1472 ◽  
Author(s):  
Cui Maolei ◽  
Ding-Yunhong ◽  
Yang Zhengming ◽  
Xiong Shengchun ◽  
Wang Xuewu
Keyword(s):  
Numerical Simulation ◽  
Simulation Study ◽  
Low Permeability ◽  
Co2 Flooding ◽  
Low Permeability Reservoirs

scholarly journals Numerical Simulation of Microemulsion Flooding in Low-Permeability Reservoir

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Dongqi Wang ◽  
Daiyin Yin ◽  
Xiangzhu Gong
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Moisture Content ◽  
Pressure Gradient ◽  
Laboratory Experiments ◽  
Flow Equation ◽  
Low Permeability ◽  
Threshold Pressure ◽  
Threshold Pressure Gradient ◽  
Relative Errors

Based on the features of microemulsion flooding in low-permeability reservoir, a three-dimension three-phase five-component mathematical model for microemulsion flooding is established in which the diffusion and adsorption characteristics of surfactant molecules are considered. The non-Darcy flow equation is used to describe the microemulsion flooding seepage law in which the changes of threshold pressure gradient can be taken into account, and the correlation coefficients in the non-Darcy flow equation are determined through the laboratory experiments. A new treatment for the changes of threshold pressure and the quantitative description of adsorption quantity of surfactant and relative permeability curves are presented, which enhance the coincidence between mathematical model and experiment results. The relative errors of main development indexes are within 4%. A software is programmed based on the model to execute a core-level small-scale numerical simulation in Chaoyanggou Oilfield. The fitting relative errors of the pressure, flow rate, and moisture content are 3.25%, 2.71%, and 2.54%, respectively. The results of laboratory experiments and numerical simulation showed that microemulsion system could reduce the threshold pressure gradient by 0.010 MPa/m and injection pressure by 0.6 MPa. The biggest decline in moisture content reaches 33%, and the oil recovery is enhanced by 10.8%.

Numerical Simulation of Pressure Distribution between Injection and Production Well in Low Permeability Reservoir

2013 ◽  
Vol 807-809 ◽  
pp. 2554-2557
Author(s):  
Qi Han Zhang ◽  
Zi Yi Guo ◽  
Ji Peng ◽  
Ting Song Xiong ◽  
Shi Feng Xue
Keyword(s):  
Numerical Simulation ◽  
Pressure Gradient ◽  
Pressure Distribution ◽  
Low Permeability ◽  
Threshold Pressure ◽  
Production Well ◽  
Pressure System ◽  
Threshold Pressure Gradient ◽  
Low Permeability Reservoir ◽  
Pressure Sensitive

Considering the pressure-sensitive effect and threshold pressure gradient in low permeability reservoirs, a new mathematical model of the variable permeability for reservoir between injection and production well is established. The Garlerkin method is used to set up the finite element computation equations, and corresponding numerical simulation program is developed. The influence of Injection-production pressure, well spacing and hydraulic fracture are quantitative evaluation. The simulation results show that the pressure-sensitive effect and threshold pressure gradient has a strong influence on pressure distribution between injection and production wells. Establishing the effective driving pressure system is the key to improve well production of low permeability reservoir.

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