scholarly journals EFFECT OF NON-EQUILIBRIUM RELATIVE PERMEABILITY ON WELL PERFORMANCE

2018 ◽  
pp. 52-59
Author(s):  
A. V. Ivanov ◽  
S. V. Stepanov ◽  
S. A. Levagin
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Relative Permeability ◽  
Physical Characteristics ◽  
Oil Field ◽  
Oil Well ◽  
Well Performance ◽  
Non Equilibrium

The article discusses the results of applying the developed software for numerical analysis of the effectiveness of oil well work. We have studied the object which is similar to BV8(1-2) formation of the Samotlor oil field in its geology and geological and physical characteristics. The software has been created on the basis of physico-mathematical model describing the filtration oil and water in the reservoir, including taking into account the non-equilibrium relative permeability.

A Numerical Analysis of Non-equilibrium Thermodynamic Effects in an Oil Field: Two-equation Model

2013 ◽  
Vol 31 (2) ◽  
pp. 192-203 ◽  
Author(s):  
G. Espinosa-Paredes ◽  
A. Vázquez-Rodríguez ◽  
E.-G. Espinosa-Martínez ◽  
O. Cazarez-Candia ◽  
M. Díaz Viera ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Equation Model ◽  
Oil Field ◽  
Equilibrium Thermodynamic ◽  
Thermodynamic Effects ◽  
Non Equilibrium

Research and Application of Depressure and Increasing Injection Technology in Low Permeability Oilfield

2011 ◽  
Vol 347-353 ◽  
pp. 651-658
Author(s):  
Wei Dong Liu ◽  
Su Nan Cong ◽  
Hong Jun Gu ◽  
Zhen Rong Nie
Keyword(s):  
Relative Permeability ◽  
Oil Recovery ◽  
Water Injection ◽  
Oil Field ◽  
Wettability Alteration ◽  
Low Permeability ◽  
Chemical Agent ◽  
Oil Well ◽  
Cross Point ◽  
Oil Reserves

In China, most of undeveloped oil reserves are low and ultra low permeability reservoirs. The total remaining petroleum reserves of CNPC is about 4.07×107m3, and the low and ultra low permeability reserves is 3.16×107m3, So it is important to reasonable develop the oil reserves to keep the petroleum output stable. Under the low permeability layer condition, it is difficult to inject water to the formation, and the output of oil well is very low. The chemical agent can solve the difficulty of injection water and enhance the oil recovery. The relative permeability experiments shows irreducible oil was reduced by the wettability alteration agents, and the mobile oil saturation increased, which enlarging the range of the two phases co-flowing and enhancing oil recovery. As a result with alteration agents, the cross-point relative permeability moves to right, and the core converts to water-wet. In daqing oil field test, the water injection pressure is reduced by 15%, and the term of validity is more than 10 months.

scholarly journals Theoretical and numerical analysis of novel COVID-19 via fractional order mathematical model

2021 ◽  
Vol 20 ◽  
pp. 103676
Author(s):  
Amjad Ali ◽  
Muhammad Yasin Khan ◽  
Muhammad Sinan ◽  
F.M. Allehiany ◽  
Emad E. Mahmoud ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Fractional Order ◽  
Theoretical And Numerical Analysis

The Numerical Analysis of the Velocity and Pressure Distribution of the Oil Film in Heavy Hydrostatic Thrust Bearing

2014 ◽  
Vol 541-542 ◽  
pp. 658-662
Author(s):  
Jian Li ◽  
Yuan Chen ◽  
Yang Chun Yu ◽  
Zhu Xin Tian ◽  
Yu Huang
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Pressure Distribution ◽  
Working Conditions ◽  
Thrust Bearing ◽  
Rotation Speed ◽  
The Other ◽  
Surface Load ◽  
Oil Film ◽  
Volume Method

To study the velocity and pressure distribution of the oil film in a heavy hydrostatic thrust bearing, a mathematical model of the velocity is proposed and the finite volume method (FVM) has been used to simulate the flow field under different working conditions. Some pressure experiments were carried out and the results verified the correctness of the simulation. It is concluded that the pressure distribution varies small under different rotation speed when the surface load on the workbench is constant. But the velocity of the oil film is influenced greatly by the rotation speed. When the rotation speed of the workbench is as quick as enough, the velocity of the oil film on one radial side of the pad will be zero, that is to say the lubrication oil will be drained from the other three sides of the recess.

Downhole CO2 partial pressure calculation and tubing material selection – a case study of an offshore oil field in the South China Sea

2016 ◽  
Vol 63 (5) ◽  
pp. 414-420 ◽  
Author(s):  
Wei Yan ◽  
Yong Xiang ◽  
Wenliang Li ◽  
Jingen Deng
Keyword(s):  
Partial Pressure ◽  
Pressure Profile ◽  
Field Application ◽  
Separation Process ◽  
Oil Field ◽  
Oil Well ◽  
Content Type ◽  
Calculating Method ◽  
Oil Gas

Purpose This paper aims to establish the downhole CO2 partial pressure profile calculating method and then to make an economical oil country tubular goods (OCTG) anti-corrosion design. CO2 partial pressure is the most important parameter to the oil and gas corrosion research for these wells which contain sweet gas of CO2. However, till now, there has not been a recognized method for calculating this important value. Especially in oil well, CO2 partial pressure calculation seems more complicated. Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. A case study was presented according to the new method, and two kinds of corrosion environment were determined. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. Based on the test results, 3Cr-L80 was recommended for downhole tubing. Combined with the field application practice, 3Cr-L80 was proved as a safety and economy anti-corrosion tubing material in this oil field. A proper corrosion parameter (mainly refers to CO2 partial pressure and temperature) can ensure a safety and economy downhole tubing anti-corrosion design. Design/methodology/approach Based on Dolton partial pressure law and oil gas separation process, CO2 partial pressure profile calculating method in oil well is proposed. An experimental research was conducted on N80, 3Cr-L80 and 13Cr-L80 material. A field application practice was used. Findings It is necessary to calculate the CO2 partial pressure properly to ensure a safety and economy downhole tubing (or casing) anti-corrosion design. Originality/value The gas and oil separation theory and corrosion theory are combined together to give a useful method in downhole tubing anti-corrosion design method.

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