Investigation of the effect of gas compositions on low-tension-gas flooding

Monette, Matthew; Nguyen, Quoc P.

doi:10.1016/j.petrol.2021.109140

Cited by 8 publications

(10 citation statements)

References 15 publications

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“…Materials. The crude oil sample was Tuo 28 crude oil from Sheng Li Oilfield in China, with an acid number of 0.99 mg KOH/g and a density of 0.9487 g/cm 3 Oilfield, SINOPEC with a solids content of 90% and a median particle size of 813 μm. 33 The water used for the experiments was the formation brine from Tuo 28, and the mass concentration of the ions in the formation brine is shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…With the increasing demand for petroleum fuels, enhanced oil recovery (EOR) has become an urgent task for the oil industry. In order to enhance crude oil recovery, various EOR techniques have been developed to improve the physical and chemical properties of oil reservoirs, including chemical flooding, thermal flooding, gas flooding, and microbial flooding . Currently, chemical flooding is considered to be an economical and effective means for EOR. , The injection of specific chemicals into oil reservoirs can increase the pore pressure, reduce the interfacial tension (IFT), and increase the flow ability of crude oil, thus extracting the residual oil trapped in the pore space or blind areas of the rock more easily …”

Section: Introductionmentioning

confidence: 99%

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Dilational Rheological Properties of Surfactants at the Crude Oil–Water Interface: The Effect of Branch-Preformed Particle Gels and Polymers

et al. 2022

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The interfacial properties of a heterogeneous composite flooding system containing a surfactant fatty alcohol polyoxyethylene carboxylate (C 12 EO 3 C), branched-preformed particle gel (B-PPG), and polymer partly hydrolyzed polyacrylamide (HPAM) at the crude oil–water interface were investigated by a dilational rheology method. The results demonstrated that the C 12 EO 3 C molecules can form an elastic interfacial film with certain strength at the crude oil–water interface. The addition of HPAM to the C 12 EO 3 C solution has a detrimental effect on the interfacial film formed by C 12 EO 3 C molecules, leading to a decrease in the dilational modulus and an increase in the phase angle. Moreover, the addition of B-PPG to the C 12 EO 3 C solution also disrupts the stability and strength of the interfacial film of C 12 EO 3 C. In particular, linear HPAM with a lower steric hindrance is more likely to insert into the interfacial film of C 12 EO 3 C; thus, HPAM possesses a stronger destruction ability for the interfacial film of C 12 EO 3 C than B-PPG. When HPAM is compounded with B-PPG, a superimposed effect exists to cause more severe disruption for the interfacial film. The heterogeneous composite flooding system not only enhances oil recovery by increasing the viscosity of the bulk phase but also weakens the interfacial film to facilitate the post-treatment of the recovered crude oil. Thus, the heterogeneous composite flooding system exhibits promising prospects in practical application.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dilational Rheological Properties of Surfactants at the Crude Oil–Water Interface: The Effect of Branch-Preformed Particle Gels and Polymers

et al. 2022

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“… 2 − 4 Hence, gas flooding becomes a promising method for EOR due to the higher injection rate and displacement efficiency. 5 − 8 …”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, low-permeability reservoir development depends largely on water flooding because of the attenuation of formation energy for enhanced oil recovery (EOR) after the primary recovery . However, water flooding in low-permeability reservoirs has a low injection rate and a poor displacement efficiency because of the formation’s anisotropy, the natural micro-fracture effect, the special pore structure, and water damage. − Hence, gas flooding becomes a promising method for EOR due to the higher injection rate and displacement efficiency. − …”

Section: Introductionmentioning

confidence: 99%

Phase Characteristics of the Miscible Zone in Natural Gas Miscible Flooding and the Gas Channeling Identification Method

Zhang

et al. 2022

ACS Omega

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As for natural gas miscible flooding in low-permeability reservoirs, studying on the phase behavior characteristic of oil–gas miscible zone has a significant meaning. In this paper, based on the reservoir characteristics of Donghe 1CIII oilfield, the evaluation of phase physical properties and minimum miscible pressure was conducted by laboratory experiments using recombined formation fluid and natural gas samples. Then, one compositional model was established to analyze the phase behavior of the miscible zone during natural gas flooding. The result shows that the fluid critical points of the miscible zone change the polynomial in the P–T diagram. More specially, the curve of critical points owns more area with higher pressure, which means that the fluid reaches a deeper miscible degree. Finally, a new chart method for gas channeling identification is proposed to evaluate the production state of the miscible zone in order to identify gas channeling. The phase envelope of the production fluid is concerned with the migration of the miscible zone. In addition, an application case in Donghe oilfield is given by means of the gas channeling-phase diagram identification method. This work could provide a theoretical basis for timely gas channeling prevention and control measures as well as improvement of the gas injection development effect.

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Nanofluids application in enhanced oil recovery process-opportunities and challenges

Liang,

Wang,

Zhu

et al. 2025

Arabian Journal of Chemistry

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Investigation of the effect of gas compositions on low-tension-gas flooding

Cited by 8 publications

References 15 publications

Dilational Rheological Properties of Surfactants at the Crude Oil–Water Interface: The Effect of Branch-Preformed Particle Gels and Polymers

Dilational Rheological Properties of Surfactants at the Crude Oil–Water Interface: The Effect of Branch-Preformed Particle Gels and Polymers

Phase Characteristics of the Miscible Zone in Natural Gas Miscible Flooding and the Gas Channeling Identification Method

Nanofluids application in enhanced oil recovery process-opportunities and challenges

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