A New Mathematical Model for Pipe Friction Coefficient Inversion in Oilfield Water Injection System

Abstract The efficiency of oilfield water injection system is generally low and energy consumption is high. With the deepening of oilfield exploitation, the water cut of the oilfield is increasing, the power consumption of the water injection system is increasing year by year, the oilfield exploitation cost is increasing, and energy conservation and consumption reduction are very important. In order to improve oilfield water injection efficiency and reduce water injection energy loss, this paper puts forward the pipe network optimization design method of partial pressure water injection, establishes the mathematical model of partial pressure water injection pipe network and throttling loss calculation model, compiles the calculation software of partial pressure water injection mathematical model, optimizes the partial pressure interval, calculates the partial pressure points, effectively reduces the energy loss of water injection system and improves the efficiency of water injection system.

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Optimization Based on Ant Colony-Genetic Algorithm in Oilfield Water Injection System

2011 International Conference on Computer and Management (CAMAN) ◽

10.1109/caman.2011.5778734 ◽

2011 ◽

Author(s):

Yuxue Wang ◽

Yinfeng Wang

Keyword(s):

Genetic Algorithm ◽

Water Injection ◽

Ant Colony ◽

Injection System ◽

Oilfield Water

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The research of numerical simulation in Wuliwan oilfield water injection system

2011 International Conference on Remote Sensing, Environment and Transportation Engineering ◽

10.1109/rsete.2011.5965130 ◽

2011 ◽

Author(s):

Guoqiang Feng ◽

Yanlai Li ◽

Xinghua Zhang ◽

Guoyong Feng

Keyword(s):

Numerical Simulation ◽

Water Injection ◽

Injection System ◽

Oilfield Water

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Mathematical Model of Thermodynamic Processes in the Intake Manifold of a Diesel Engine with Fuel and Water Injection

Energies ◽

10.3390/en13174315 ◽

2020 ◽

Vol 13 (17) ◽

pp. 4315

Author(s):

Vladimir Bondar ◽

Sergei Aliukov ◽

Andrey Malozemov ◽

Arkaprava Das

Keyword(s):

Mathematical Model ◽

Diesel Engine ◽

Rational Design ◽

Water Injection ◽

Injection System ◽

Intake Manifold ◽

Design Parameters ◽

Working Fluid ◽

The Mathematical Model ◽

Thermodynamic Processes

The article presents the results of a study aimed at creating a mathematical model of thermodynamic processes in the intake manifold of a forced diesel engine, taking into account the features of simultaneous injection of fuel and water into the collector. In the course of the study, the tasks of developing a mathematical model were solved, it was implemented in the existing software for component simulation “Internal combustion engine research and development” (ICE RnD), created using the Modelica language, and verification was undertaken using the results of bench tests of diesel engines with injection fuel and water into the intake manifold. The mathematical model is based on a system of equations for the energy and mass balances of gases and includes detailed mathematical submodels of the processes of simultaneous evaporation of fuel and water in the intake manifold; it takes into account the effect of the evaporation of fuel and water on the parameters of the gas state in the intake manifold; it takes into account the influence of the state parameters of the working fluid in the intake manifold on the physical characteristics of fuel and water; it meets the principles of component modeling, since it does not contain parameters that are not related to the simulated component; it describes the process of simultaneous transfer of vapors and non-evaporated liquids between components; and it does not include empirical relationships requiring data on the dynamics of fuel evaporation under reference conditions. According to the results of a full-scale experiment, the adequacy of the mathematical model developed was confirmed. This model can be used to determine the rational design parameters of the fuel and water injection system, the adjusting parameters of the forced diesel engine that provide the required power, and economic indicators, taking into account the limitations on the magnitude of the mechanical and thermal loads of its parts.

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Evaluation of Factors Influencing Energy Consumption in Water Injection System Based on Entropy Weight-Grey Correlation Method

Applied Mathematics and Nonlinear Sciences ◽

10.2478/amns.2021.2.00044 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Ruan Yan ◽

Wu Tong ◽

Chen Jiaona ◽

Hassan A. Alteraz ◽

Adel Ali Yassin Alzyoud

Keyword(s):

Energy Consumption ◽

Energy Loss ◽

Influencing Factors ◽

Water Injection ◽

Correlation Method ◽

Indicator System ◽

Injection System ◽

Entropy Weight ◽

Grey Correlation ◽

Oilfield Water

Abstract In order to determine the importance of influencing factors of energy consumption in oilfield water injection systems, the distribution of energy loss in the water injection system was analyzed, the factors affecting the energy consumption of the water injection system were determined, and an evaluation index system for the energy consumption of the water injection system was established. This indicator system covers all links and all energy loss nodes of the energy loss of the water injection system, thereby an evaluation model for influencing factors of energy consumption in water injection system based on entropy weight - grey correlation method was built. Use the entropy weight method to get the ranking of the importance of energy consumption indicators; use the gray correlation method to determine the correlation between each water injection system and energy consumption factors. The application results show that the entropy weight-grey correlation method proposed in this paper can effectively obtain the importance of the energy consumption factors of the oilfield water injection system, and provide scientific guidance for the daily management and targeted optimization of the water injection system.

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Optimization of Pipe Network Simulation Algorithm for Tree-shaped Water Injection System in Large-scale Oilfield

International Journal of Pattern Recognition and Artificial Intelligence ◽

10.1142/s021800142159045x ◽

2021 ◽

Author(s):

Yan Ruan ◽

Xuliang Zhang ◽

Jiaona Chen

Keyword(s):

Mathematical Model ◽

Pressure Drop ◽

Large Scale ◽

Network Simulation ◽

Water Injection ◽

Injection System ◽

Simulation Algorithm ◽

Pipe Network ◽

Reference Node ◽

Pipe Section

As intelligence technology develops, there is a higher requirement for computing speed and accuracy of water injection system simulation. In this paper, aiming at the tree-shaped water injection pipe network system of large-scale oilfields, based on the energy equation for calculating the pressure drop [Formula: see text] of pipe section, a mathematical model of the pipeline unit and the node unit is established, and finally, a mathematical model of pipe network for the entire water injection system is established; then, the improved iterative algorithm is used to solve the simulation model of water injection system. In this way, we determine the boundary calculation conditions, take the water injection station as reference node, and use the maximum pressure of water injection well as the initial value of the reference node for calculation, which reduces the number of iterations in model calculation; by comparing the simulation results of different iteration steps, 0.01 is selected as the iteration step size due to its higher calculation accuracy; and the calculation process has also been optimized. The process of solving the characteristic matrix [Formula: see text] is combined with the process of calculating the pressure drop [Formula: see text] of pipe section, and placed outside the algorithm loop, thereby shortening the calculation time of a single cycle and reducing the calculation amount of the algorithm. The application cases show that the proposed optimization algorithm for water injection system pipe network simulation can be used as an effective method to improve the solution speed and calculation accuracy of the simulation algorithm of tree-shaped water injection system in large-scale oilfields.

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