scholarly journals Modeling and Simulation of Polymer Flooding with Time-Varying Injection Pressure

ACS Omega ◽  
2020 ◽  
Vol 5 (10) ◽  
pp. 5258-5269
Author(s):  
Ahmad Ali Manzoor
Keyword(s):  
Modeling And Simulation ◽  
Injection Pressure ◽  
Polymer Flooding ◽  
Time Varying

scholarly journals Investigation on degradation mechanism of polymer blockages in unconsolidated sandstone reservoirs

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 55-60
Author(s):  
Wenting Dong ◽  
Dong Zhang ◽  
Keliang Wang ◽  
Yue Qiu
Keyword(s):  
Oil Recovery ◽  
Degradation Mechanism ◽  
Injection Pressure ◽  
Polymer Flooding ◽  
Core Flooding ◽  
Reservoir Properties ◽  
Thermal Analyzer ◽  
Sandstone Reservoirs ◽  
Suction Index ◽  
Weighing Method

AbstractPolymer flooding technology has shown satisfactorily acceptable performance in improving oil recovery from unconsolidated sandstone reservoirs. The adsorption of the polymer in the pore leads to the increase of injection pressure and the decrease of suction index, which affects the effect of polymer flooding. In this article, the water and oil content of polymer blockages, which are taken from Bohai Oilfield, are measured by weighing method. In addition, the synchronous thermal analyzer and Fourier transform infrared spectroscopy (FTIR) are used to evaluate the composition and functional groups of the blockage, respectively. Then the core flooding experiments are also utilized to assess the effect of polymer plugs on reservoir properties and optimize the best degradant formulation. The results of this investigation show that the polymer adsorption in core after polymer flooding is 0.0068 g, which results in a permeability damage rate of 74.8%. The degradation ability of the agent consisting of 1% oxidizer SA-HB and 10% HCl is the best, the viscosity of the system decreases from 501.7 to 468.5 mPa‧s.

scholarly journals Simulation of several flying situations of paragliders

2021 ◽  
Vol 15 (1) ◽  
pp. 79-89
Author(s):  
Thanh Xuan Nguyen ◽  
Phuong Thi-Thu Phan ◽  
Tien Van Pham
Keyword(s):  
Mathematical Modeling ◽  
Differential Equations ◽  
Modeling And Simulation ◽  
Ordinary Differential Equations ◽  
State Space ◽  
Simulation Modeling ◽  
Time Varying ◽  
Gravity Forces

Paragliding is an adventure and fascinating sport of flying paragliders. Paragliders can be launched by running from a slope or by a winch force from towing vehicles, using gravity forces as the motor for the motion of flying. This motion is governed by the gravity forces as well as time-varying aerodynamic ones which depend on the states of the motion of paraglider at each instant of time. There are few published articles considering mechanical problems of paragliders in their various flying situations. This article represents the mathematical modeling and simulation of several common flying situations of a paraglider through establishing and solving the governing differential equations in state-space. Those flying situations include the ones with constant headwind/tailwind with or without constant upwind; the ones with different scenario for the variations of headwind and tailwind combined with the upwind; the ones with varying pilot mass; and the ones whose several parameters are in the form of interval quantities. The simulations were conducted using a powerful Julia toolkit called DifferentialEquations.jl. The obtained results in each situation are discussed, and some recommendations are presented. Keywords: paraglider; simulation; modeling; state-space; ordinary differential equations; Julia; DifferentialEquations.jl

scholarly journals Modeling and simulation of a time-varying inertia aircraft in aerial refueling

2016 ◽  
Vol 29 (2) ◽  
pp. 335-345 ◽  
Author(s):  
Haitao Wang ◽  
Xinmin Dong ◽  
Jianping Xue ◽  
Jiaolong Liu ◽  
Jian Wang
Keyword(s):  
Modeling And Simulation ◽  
Time Varying ◽  
Aerial Refueling

Real-Time Digital Time-Varying Harmonic Modeling and Simulation Techniques IEEE Task Force on Harmonics Modeling and Simulation

2007 ◽  
Vol 22 (2) ◽  
pp. 1218-1227 ◽  
Author(s):  
Lok-Fu Pak ◽  
Venkata Dinavahi ◽  
Gary Chang ◽  
Michael Steurer ◽  
Paulo F. Ribeiro
Keyword(s):  
Modeling And Simulation ◽  
Real Time ◽  
Task Force ◽  
Time Varying ◽  
Simulation Techniques ◽  
Digital Time

Evaluation of Potential of Remaining Oil after Polymer Flooding

2013 ◽  
Vol 734-737 ◽  
pp. 1189-1195
Author(s):  
Li Yan Sun ◽  
Hai Dong Shi ◽  
Hao Yang ◽  
Ji Cheng Zhang
Keyword(s):  
Oil Recovery ◽  
Injection Pressure ◽  
Injection Rate ◽  
Polymer Flooding ◽  
Oil Field ◽  
Basic Principles ◽  
Oil Distribution ◽  
Remaining Oil ◽  
Daqing Oil Field ◽  
Remaining Oil Distribution

Figuring out the rule of remaining oil distribution after polymer flooding is the basis for continuing study on development policy after polymer flooding in Daqing Oil Field. Based on the basic principles of percolation mechanics, percolation mechanics of polymer flooding reservoirs under fixed injection pressure and injection rate was studied, the mechanism of remaining oil changes after polymer flooding was investigated; According to the numerical simulation results, the rule of remaining oil distribution in Daqing oilfield has been given out. This will be theoretical and practical guidance for enhancing oil recovery after polymer flooding.

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