Integrated Evaluation of Surfactant-Polymer Floods

Gao, Panqing; Towler, Brian F.; Li, Ye; Zhang, Xiafeng

doi:10.2118/129590-ms

Cited by 15 publications

(4 citation statements)

References 35 publications

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“…[1][2][3][4][5] Engineers need to choose a reasonable and effective oil displacement method. 6,7 However, the original oil recovery methods, such as primary and secondary oil recovery, are only suitable for shallower reservoirs and lighter heavy oils. 8 After the long-term use of water flooding, secondary oil recovery made the reservoir heterogeneity more prominent.…”

Section: Introductionmentioning

confidence: 99%

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

Yao

Zhong

et al. 2022

Polymers and Polymer Composites

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With the depletion of conventional resources, it is necessary to enhance the recovery of remaining oil. The tertiary oil recovery chemical flooding is the most promising for enhanced oil recovery (EOR). The use of alkali in chemical flooding produces fouling with the formation, which brings new challenges to chemical flooding EOR. So, alkali-free surfactant-polymer (SP) flooding is used as a new solution for EOR. The polymer makes the displacing fluid have a high viscosity and increases the swept volume. The surfactant can decrease the interfacial tension and emulsify the crude oil while the displacing fluid reaches the corresponding area. The synergistic effect of the two is more conducive to the recovery of the remaining oil. As a result, SP flooding is a more practical approach to enhance oilfield EOR. The research status of several surfactant and polymer types for EOR is reported in this work. According to the study, complex and anionic surfactants are better for EOR. For difficult formations, SP flooding is more suited because of the presence of polymers. Additionally, study analysis demonstrates that SP flooding and alternative polymer injection, when employed at the same cost, can enhance EOR and assist in resolving issues brought on by low oil prices.

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Section: Introductionmentioning

confidence: 99%

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

Yao

Zhong

et al. 2022

Polymers and Polymer Composites

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“…In China, the use of polymer in Daqing has already obtained a great success. Surfactant functions work by adding certain concentrations of surfactants to injection water to reduce the interfacial tension (IFT) between displacing and displaced phases [2,3]. Flow of the surfactant formulation through the reservoir allows the trapped oil droplets to deform and become mobile oil.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it is very important to conduct reservoir numerical simulation study. On the basis of compositional model, a mathematical model of surfactant flooding was established, in which the changes of threshold pressure and relative permeability which are caused by surfactant flooding [3,10] …”

Section: Introductionmentioning

confidence: 99%

A New Surfactant Flooding Model for Low Permeability Reservoirs

Li¹,

Yin²

2013

OJFD

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Surfactant as a successful Enhanced Oil Recovery (EOR) agent has been widely used in many mature reservoirs. This research focuses on the description of surfactant solution at low permeability condition. A new three-dimensional, twophase, three-component surfactant simulator is presented. The simulator is based on the non-Darcy flow characteristics of surfactant flooding in the low permeability formations. The change of threshold pressure and influences of surfactant on convection, diffusion, adsorption, and retention, are all considered. A new equation for the calculation of surfactant adsorption is employed, which can significantly promote the matching degree between the mathematical model and field practice. The design of this new simulator is to help the decision-making in the reservoir engineering analysis of surfactant EOR projects, to face the challenge of the design of injection schemes, to assist the surfactant screening, to screen and assess laboratory and field data and their effect on the performance predictions, and to find the optimal methods of field development.

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“…It has received much attention from both the scientic and industrial communities since two-thirds of crude oil were still trapped in oil reservoirs aer primary and secondary oil recovery. 1,6 Over the past few years, SP ooding has been conducted on modest scales and signicantly improved EOR efficiency in Daqing Oileld 7 and Shengli Oileld, 8 China. In the absence of alkali, however, the most traditional surfactant-polymer ooding systems could not reach the required ultralow interfacial tension, and may consequently fail in EOR.…”

mentioning

confidence: 99%