scholarly journals Enhanced oil recovery by CO2 flooding effect on asphaltene stability envelope and Compositional Simulation of Asphaltenic Oil Reservoir

2011 ◽  
Author(s):  
Miftachul Choiri ◽  
Aly Anis Hamouda
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Reservoir ◽  
Co2 Flooding ◽  
Compositional Simulation

scholarly journals Enhanced oil recovery mechanisms of polymer flooding in a heterogeneous oil reservoir

2021 ◽  
Vol 48 (1) ◽  
pp. 169-178
Author(s):  
Xiangguo LU ◽  
Bao CAO ◽  
Kun XIE ◽  
Weijia CAO ◽  
Yigang LIU ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Polymer Flooding ◽  
Oil Reservoir ◽  
Recovery Mechanisms

Improved Fluids Characterization Model During Gas Huff-n-Puff EOR Processes in Unconventional Reservoirs

2021 ◽  
Author(s):  
Gang Yang ◽  
Xiaoli Li
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Fluid Model ◽  
Geometric Constraints ◽  
Confinement Effect ◽  
Recovery Factor ◽  
Unconventional Reservoirs ◽  
Compositional Simulation ◽  
Compositional Model ◽  
Characterization Model

Abstract Despite the great potential of unconventional hydrocarbons, the primary recovery factor from such reservoirs remain low. The gas-injection enhanced oil recovery (EOR) has been proved to be a promising approach by both laboratory and simulation studies. However, the fluid model for characterizing gas and oil in nanoscale pores has not been well understood and developed. Erroneous results can be generated if the bulk fluids model is applied, resulting in a large uncertainty for the numerical simulations. The objective of this work is to propose an improved fluids characterization model tailored for the compositional simulation of gas huff-n-puff in unconventional reservoirs. The Peng-Robinson equation of state (PR EOS) is used as the basic thermodynamic model in this work. Both the attraction parameter and the co-volume parameter in the PR EOS are simultaneously modified for the first time to reflect the effect of molecule-wall interaction and geometric constraints. The collected experimental data are used for validating the model. The newly generated PVT data are imported into the compositional model to numerically simulate the gas huff-n-puff process in the Middle Bakken formation to investigate the influence of modified fluid property on the production and ultimate recovery. The improved fluids characterization model is validated applicable to calculate the confined properties of reservoir fluids. It is demonstrated that the phase envelope of the confined reservoir fluids tends to shrink. At reservoir temperature, the bubble-point pressure of the Middle Bakken oil is reduced by 17.32% with consideration of the confinement effect. Such a significant suppression represents a late occurrence of the gas evaporation, which implies a potentially higher production of the shale oil reservoir. Compositional simulation predicts that the enhanced oil recovery efficiency of CO2 huff-n-puff is unsatisfactory for the specific well in this work, which is also demonstrated in the field pilot test. However, the confinement effect results in a 1.14% elevation of the oil recovery factor in 10 years production. This work not only deepens our understanding of the confinement effect on phase behavior characterization and also shed light on the computation of the thermodynamic properties of hydrocarbons in nanopores. The results also provide practical instructions for the EOR development of unconventional reservoirs.

Enhanced Oil Recovery for Carbonate Oil Reservoir by Using Nano-Surfactant:Part II

2019 ◽  
Author(s):  
Ali K. Alhuraishawy ◽  
Ramzy S. Hamied ◽  
Hajir A. Hammood ◽  
Waleed Hussien AL-Bazzaz
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Reservoir

Enhanced Oil Recovery for Carbonate Oil Reservoir by using Nano-Surfactant:Part I

2019 ◽  
Author(s):  
Hajir A. Hammood ◽  
Ali K. Alhuraishawy ◽  
Ramzy S. Hamied ◽  
Waleed Hussien AL-Bazzaz
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Reservoir
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