Enhancement of oil recovery by surfactant-polymer synergy flooding: A review

An, Yuxiu; Yao, Xiutian; Zhong, Jinpan; Pang, Shaocong; Xie, Hailong

doi:10.1177/09673911221145834

Cited by 7 publications

(6 citation statements)

References 61 publications

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“…However, due to technical means and economic factors, a large part of crude oil is still stuck in the stratum. Therefore, it is urgent to explore various new technical means for underground complex areas, carrying out reasonable research on enhanced oil recovery to meet the demand for oil in daily production [33,34].…”

Section: Polymer Gel Application In Chinamentioning

confidence: 99%

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Pan,

Kang,

Jiang

et al. 2024

jour

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Many oilfields around the world are using enhanced oil recovery methods to maximize oil production. Longterm water flooding processes have led to water channeling in mature reservoirs, which is a severe problem in oilfields. Polymer gel is widely used as a plugging agent to reduce water production. Previously, the conventional polymer gel is extensively used for blocking the thief zones, but the performance of conventional polymer gel is not satisfactory in high salinity and high temperature conditions due to rapid syneresis and thermal degradation. The amphiphilic polymer is taking much attention for polymer gel formulation because they are more salt resistant in low concentration compared to high concentration conventional HPAM polymer. In this paper, the crosslinking mechanism of insitu polymer gel is reviewed. The related difficulties and development prospects of polymer gels are presented. It provides a basis for the application of polymer gel in oilfield conformance control treatment. This will help researchers to develop polymer gels to improve oil recovery under economic conditions to meet the requirements of oilfields.

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Section: Polymer Gel Application In Chinamentioning

confidence: 99%

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Pan,

Kang,

Jiang

et al. 2024

jour

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“…Consequently, chemical flooding as a secondary oil recovery technology has gradually become the primary enhanced oil recovery method and has been applied to old oilfields after water flooding. For instance, polymer flooding technology has been widely utilized in Daqing Oilfield since 1996, resulting in remarkable economic effects and confirming the feasibility of the technique in enhancing oil recovery in reservoirs after water flooding [1][2][3]. However, the oil reservoirs exhibit pronounced heterogeneity in both the horizontal and vertical directions after polymer flooding, leading to a significant challenge in profile control [4,5].…”

Section: Introductionmentioning

confidence: 95%

Experimental Study on Enhanced Oil Recovery of Adaptive System after Polymer Flooding

Pi,

Fan,

Liu

et al. 2023

Polymers

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After polymer flooding in Daqing Oilfield, the heterogeneity of the reservoir is enhanced, leading to the development of the dominant percolation channels, a significant issue with inefficient circulation, a substantial amount of displacement agents, and elevated cost. In order to further improve oil recovery, an adaptive oil displacement system (ASP-PPG) was proposed by combining preformed particle gel (PPG) with an alkali-surfactant-polymer system (ASP). This comprehensive study aims to assess the effectiveness of the adaptive oil displacement system (ASP-PPG) in improving the recovery efficiency of heterogeneous reservoirs after polymer flooding. The evaluation encompasses various critical aspects, including static performance tests, flow experiments, microscopic experiments, profile control experiments, and flooding experiments conducted on a four-layer heterogeneous physical model. The experimental results show that the adaptive system has robust stability, enhanced mobility, effective plugging capability, and profile improvement capability. Notably, the system demonstrates the remarkable ability to successfully pass through the core and effectively block the large pores, resulting in an 18.4% recovery incremental after polymer flooding. This improvement is reflected in the reduced oil saturation values in the ultra-high permeability, high permeability, medium, and low permeability layers, which are 5.09%, 7.01%, 13.81%, and 15.45%, respectively. The adaptive system effectively recovered the remaining oil in the low and medium permeability layers, providing a promising approach for improving the recovery factors under challenging reservoir conditions.

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“…Surfactants are widely used in the tertiary oil recovery process. − Surfactants improve oil recovery by decreasing the interfacial tension (IFT) between the injected water and residual oil and changing the wettability of the formation rock. − IFT reduction and wettability alteration are two of the most important mechanisms in improving oil recovery using various injectants. , Surfactant molecules have a polar hydrophilic head and a nonpolar hydrophobic tail, enabling them to form aggregates in the aqueous phase. When being dispersed in water, surfactant molecules form micelles by gathering the tails and contacting the surrounding water using their heads .…”

Section: Introductionmentioning

confidence: 99%

Measurements of Surfactant Adsorption on Sandstone in the Presence of Deep Eutectic Solvents

Guo,

Bai,

Wei

et al. 2024

Energy Fuels

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How to reduce surfactant adsorption on a rock surface is a challenging task because surfactant adsorption would negatively affect the performance of surfactants in enhanced oil recovery. This study thoroughly investigates the effects of various deep eutectic solvent (DES) samples on surfactant adsorption. The surfactant adsorption amounts are quantitatively determined by measuring the variations in the surface tensions of surfactant solutions before and after the adsorption experiments. First, the surface tensions of various pure DES solution samples at different concentrations are measured. The results suggest that the prepared DES samples cannot alter the surface tension of water. Then, the surface tensions of various pure surfactant solutions with different concentrations are measured to build the relationship between surface tension and surfactant concentrations. Afterward, the adsorption experiments are conducted by mixing the crushed Berea sandstone samples with the pure surfactant solutions and the composite DES−surfactant solutions. Next, the surface tensions of the supernatants separated from the mixtures are measured. Correspondingly, the surfactant adsorption amounts are back-calculated from the built relationship between the surface tension and surfactant concentration. The results demonstrate that the DES samples prepared in this study can inhibit the adsorption of the three surfactants on the rock surface. Among all the tested DES samples, the DES sample of choline chloride (ChCl)/urea (1:2) has the most promising performance in inhibiting the adsorption of the surfactant of petroleum sulfonate on the rock surface. Finally, two dynamic adsorption experiments further prove that surfactant adsorption on sandstone particles can be inhibited by adding DES samples.

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Enhancement of oil recovery by surfactant-polymer synergy flooding: A review

Cited by 7 publications

References 61 publications

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Experimental Study on Enhanced Oil Recovery of Adaptive System after Polymer Flooding

Measurements of Surfactant Adsorption on Sandstone in the Presence of Deep Eutectic Solvents

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