scholarly journals Enhanced oil recovery mechanism and recovery performance of micro‐gel particle suspensions by microfluidic experiments

2020 ◽  
Vol 8 (4) ◽  
pp. 986-998 ◽  
Author(s):  
Wenhai Lei ◽  
Tong Liu ◽  
Chiyu Xie ◽  
Haien Yang ◽  
Tianjiang Wu ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Particle Suspensions ◽  
Recovery Mechanism ◽  
Recovery Performance

Experimental investigation of carboxylate-alumoxane nanoparticles for the enhanced oil recovery performance

2019 ◽  
Vol 563 ◽  
pp. 37-49 ◽  
Author(s):  
Saman Bagherpour ◽  
Alimorad Rashidi ◽  
Seyed Hamed Mousavi ◽  
Nosrat Izadi ◽  
Esmaeil Hamidpour
Keyword(s):  
Experimental Investigation ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Recovery Performance

In Situ CO2 Enhanced Oil Recovery: Parameters Affecting Reaction Kinetics and Recovery Performance

2019 ◽  
Vol 33 (5) ◽  
pp. 3844-3854 ◽  
Author(s):  
Shuoshi Wang ◽  
Changlong Chen ◽  
Keren Li ◽  
Na Yuan ◽  
Benjamin Shiau ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Recovery Performance

Enhanced Oil Recovery by Flooding With Dilute Aqueous Chemical Solutions

1981 ◽  
Vol 103 (4) ◽  
pp. 285-290 ◽  
Author(s):  
K. I. Kamath ◽  
S. J. Yan
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Laboratory Data ◽  
Recovery Process ◽  
Immiscible Displacement ◽  
Residual Oil ◽  
Oil Viscosity ◽  
Recovery Mechanism ◽  
Tertiary Oil Recovery ◽  
Hydrolyzed Polyacrylamide

The theory of enhanced oil recovery by surfactant flooding (micellarpolymer and “low-tension” floods) is based on three premises: that the chemical slug is 1) less mobile than the crude oil, 2) miscible with the reservoir fluids (oil and brine), and 3) stable over long periods of time (years) in the reservoir environment. We report here a rather simple process in which none of these expensive and exacting requirements have to be met. In this process, relatively small amounts of “EOR-active” substances present in certain petroleum-based sulfonates are found to recover 15–20 percent of the residual oil from waterflooded Berea sandstone cores. The chemicals are injected in the form of slugs of their aqueous solutions. If the chemical slugs are followed with similar slugs of additives such as partially hydrolyzed polyacrylamide, acrylamide monomer, urea, EDTA, or anions such as P2O7‴‴‴‴ and PO4‴‴‴, the oil recovery is increased 30–40 percent of the in-place residual oil. The concentrations of the “active” sulfonate and additive in their respective slugs appear to be of the order of 500 ppm or less. Extrapolation of the laboratory data to field conditions indicate that chemical requirements for the recovery of a barrel of tertiary oil are about 0.5–2 lb of sulfonate and a like amount of additive. The main features of the displacement process are: 1) Oil recovery is independent of oil viscosity in the tested range of 0.4–100 cps. 2) The process is essentially an immiscible displacement in which oil recovery depends on the amount of active chemical in the slug and not its concentration. 3) Tertiary oil is produced in the form of a clean “oil bank” and the buildup of a residual oil saturation at the producing end of linear cores occurs during the flood. From the data on hand, it is apparent that the oil recovery mechanism differs basically in character from the conventional Buckley-Leverett-type immiscible displacement. The low level concentrations of sulfonate and additive involved, and the independence of oil recovery with respect to oil viscosity suggest that the recovery mechanism is possibly actuated by certain specific functional groups in the structure of the EOR-active molecule or its anion, and of the additive. The results hold great potential for developing a simple and economical tertiary oil recovery process that can recover, very substantially, more oil (light as well as moderately viscous) than is now considered possible by conventional chemical floods.

scholarly journals Role of Phase-Dependent Dielectric Properties of Alumina Nanoparticles in Electromagnetic-Assisted Enhanced Oil Recovery

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1975 ◽  
Author(s):  
Muhammad Adil ◽  
Kean Chuan Lee ◽  
Hasnah Mohd Zaid ◽  
Takaaki Manaka
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Metal Oxide Nanoparticles ◽  
Dielectric Behavior ◽  
Mobility Ratio ◽  
Reservoir Rock ◽  
Wettability Alteration ◽  
Alumina Nanoparticles ◽  
Recovery Mechanism ◽  
Al2o3 Nps

The utilization of metal-oxide nanoparticles in enhanced oil recovery (EOR) has generated considerable research interest to increase the oil recovery. Among these nanoparticles, alumina nanoparticles (Al2O3-NPs) have proved promising in improving the oil recovery mechanism due to their prominent thermal properties. However, more significantly, these nanoparticles, coupled with electromagnetic (EM) waves, can be polarized to reduce water/oil mobility ratio and create disturbances at the oil/nanofluid interface, so that oil can be released from the reservoir rock surfaces and travelled easily to the production well. Moreover, alumina exists in various transition phases (γ, δ, θ, κ, β, η, χ), providing not only different sizes and morphologies but phase-dependent dielectric behavior at the applied EM frequencies. In this research, the oil recovery mechanism under EM fields of varying frequencies was investigated, which involved parameters such as mobility ratio, interfacial tension (IFT) and wettability. The displacement tests were conducted in water-wet sandpacks at 95 °C, by employing crude oil from Tapis. Alumina nanofluids (Al2O3-NFs) of four different phases (α, κ, θ and γ) and particle sizes (25–94.3 nm) were prepared by dispersing 0.01 wt. % NPs in brine (3 wt. % NaCl) together with SDBS as a dispersant. Three sequential injection scenarios were performed in each flooding scheme: (i) preflushes brine as a secondary flooding, (ii) conventional nano/EM-assisted nanofluid flooding, and (iii) postflushes brine to flush NPs. Compared to conventional nanofluid flooding (3.03–11.46% original oil in place/OOIP) as incremental oil recovery, EM-assisted nanofluid flooding provided an increase in oil recovery by approximately 4.12–12.90% of OOIP for different phases of alumina. It was established from these results that the recovery from EM-assisted nanofluid flooding is itself dependent on frequency, which is associated with good dielectric behavior of NPs to formulate the oil recovery mechanism including (i) mobility ratio improvement due to an electrorheological (ER) effect, (ii) interfacial disturbances by the oil droplet deformation, and (iii) wettability alteration by increased surface-free energy.

Enhanced oil recovery mechanism of CO 2 water-alternating-gas injection in silica nanochannel

Fuel ◽  
2017 ◽  
Vol 190 ◽  
pp. 253-259 ◽  
Author(s):  
Youguo Yan ◽  
Chuanyong Li ◽  
Zihan Dong ◽  
Timing Fang ◽  
Baojiang Sun ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Gas Injection ◽  
Recovery Mechanism ◽  
Water Alternating Gas
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