Investigation of a high temperature gel system for application in saline oil and gas reservoirs for profile modification

Liu, Jianbin; Zhong, Liguo; Wang, Cheng; Li, Shihao; Yuan, Xiaonan; Liu, Yigang; Meng, Xianghai; Zou, Jian; Wang, Qiuxia

doi:10.1016/j.petrol.2020.107852

Cited by 27 publications

(11 citation statements)

References 14 publications

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“…To date, polymer gel treatments have been an effective strategy for gas mobility control, including N 2 and CO 2 [ 8 , 9 , 10 ]. Generally, polymer gels are derived from the cross-linking process of the polymers with different types of cross-linkers [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Probing the Effect and Mechanism of Flue Gas on the Performance of Resorcinol/Hexamethylenetetramine-Based Polymer Gel in Flue Gas Flooding Reservoir

Qiao

Zhang

et al. 2022

Gels

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Polymer gel plugging is an effective method for gas mobility control in flue gas flooding reservoirs. However, the effect and mechanism of flue gas on the performance of polymer gels have rarely been reported. In this study, a polymer gel was prepared by cross-linking hydrolyzed polyacrylamide (HPAM) and resorcinol/ hexamethylenetetramine (HMTA) to illuminate the influencing mechanism of flue gas composition on gel. The gel rheological testing results showed that flue gas promoted gelation performance, whereas it seriously threatened gel long-term stability, especially at high pressure conditions. The influence of CO2 on the polymer gel had the characteristic of multiplicity. The hydrodynamic radius (Rh) and the initial viscosity of HPAM solution decreased in the presence of CO2. Nonetheless, the dissolved CO2 expedited the decomposition rate of HMTA into formaldehyde, which promoted the cross-linking process of the HPAM, leading to a shorter gelation time. Oxidation–reduction potential (ORP) tests and Fourier transform infrared spectroscopy (FTIR) analysis indicated that O2 played a leading role in the oxidative degradation of HPAM compared to CO2 and threatened the gel long-term stability at elevated gas pressures. To address the adverse effects caused by flue gas, it is highly desirable to develop polymer gels by adding oxygen scavengers or strengthening additives.

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Section: Introductionmentioning

confidence: 99%

Probing the Effect and Mechanism of Flue Gas on the Performance of Resorcinol/Hexamethylenetetramine-Based Polymer Gel in Flue Gas Flooding Reservoir

Qiao

Zhang

et al. 2022

Gels

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“…For example, the RRF value of the SGC gel with the lowest volume of 0.01 PV was 546, which was 3.33 times higher than that of the polymer gel with a volume of 0.15 PV. The 3D network-like structure of the SGC gel built a stronger barrier within the porous media, 47,48 and even a small volume of gel could achieve an excellent plugging performance, which was favorable for assisting the CO 2 huff-npuff process. It was also observed that the RRF value gradually increased when the gelant volume was less than or equal to 0.03 PV, but it scarcely increased when the volume exceeded 0.03 PV.…”

Section: Comparison Of the Injectivity And Plugging Performancesmentioning

confidence: 99%

Using starch graft copolymer gel to assist the CO₂huff-n-puff process for enhanced oil recovery in a water channeling reservoir

et al. 2022

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“…Liu et al [31] developed a gel system formed by the terpolymer (L-1) and a new cross-linking system (HB-1), and its properties were systematically studied in the condition of extremely high temperatures. Studies have shown that the gel system could form stable continuous 3D network structures in high temperatures (120 • C-200 • C).…”

Section: Study On High Temperature and High Salt Resistance Of Gel Sy...mentioning

confidence: 99%

Overview of In-Situ Gelation Behavior of Gel Systems in Porous Media

Wang¹,

Zhou²,

Xin³

et al. 2022

Int. J. Petrol. Technol.

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Cross-linked polymer gel has been widely applied in profile control and water plugging due to its effective cost, wide suitability, excellent performance, and flexible gelation time. Previous research mainly focused on the bottle tests, reaction kinetics, and rheological properties of the gels, but the works of literature about the in situ gelations of gel placement in the porous media are relatively few. The study of the in-situ gelation behavior of gel systems is widely summarized in this paper, and the research tendency is proposed. The important practical questions, including the accurate lateral distance of gel placement, the variation of gel properties, and the injection pressure profile in the process of gel injection, should be resolved by laboratory and numerical research to enhance gel treatment success rate.

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Investigation of a high temperature gel system for application in saline oil and gas reservoirs for profile modification

Cited by 27 publications

References 14 publications

Probing the Effect and Mechanism of Flue Gas on the Performance of Resorcinol/Hexamethylenetetramine-Based Polymer Gel in Flue Gas Flooding Reservoir

Probing the Effect and Mechanism of Flue Gas on the Performance of Resorcinol/Hexamethylenetetramine-Based Polymer Gel in Flue Gas Flooding Reservoir

Using starch graft copolymer gel to assist the CO₂huff-n-puff process for enhanced oil recovery in a water channeling reservoir

Overview of In-Situ Gelation Behavior of Gel Systems in Porous Media

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Investigation of a high temperature gel system for application in saline oil and gas reservoirs for profile modification

Cited by 27 publications

References 14 publications

Probing the Effect and Mechanism of Flue Gas on the Performance of Resorcinol/Hexamethylenetetramine-Based Polymer Gel in Flue Gas Flooding Reservoir

Probing the Effect and Mechanism of Flue Gas on the Performance of Resorcinol/Hexamethylenetetramine-Based Polymer Gel in Flue Gas Flooding Reservoir

Using starch graft copolymer gel to assist the CO2huff-n-puff process for enhanced oil recovery in a water channeling reservoir

Overview of In-Situ Gelation Behavior of Gel Systems in Porous Media

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Using starch graft copolymer gel to assist the CO₂huff-n-puff process for enhanced oil recovery in a water channeling reservoir