Optimized polymer enhanced foam flooding for ordinary heavy oil reservoir after cross-linked polymer flooding

Sun, Chen; Hou, Jirui; Pan, Guangming; Xia, Zhizeng

doi:10.1007/s13202-015-0226-2

Cited by 20 publications

(9 citation statements)

References 13 publications

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“…Polymer flooding is showing promising results, specifically, if flooding projects are started at high remaining oil saturations. Polymer flooding has been conducted in sandstone and carbonate reservoirs, and oil-wet, water-wet, and mixed-wettability reservoirs [8].…”

Section: Polymer Floodingmentioning

confidence: 99%

Enhanced Oil Recovery: Chemical Flooding

Ragab¹,

Mansour²

2021

Geophysics and Ocean Waves Studies

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The enhanced oil recovery phase of oil reservoirs production usually comes after the water/gas injection (secondary recovery) phase. The main objective of EOR application is to mobilize the remaining oil through enhancing the oil displacement and volumetric sweep efficiency. The oil displacement efficiency enhances by reducing the oil viscosity and/or by reducing the interfacial tension, while the volumetric sweep efficiency improves by developing a favorable mobility ratio between the displacing fluid and the remaining oil. It is important to identify remaining oil and the production mechanisms that are necessary to improve oil recovery prior to implementing an EOR phase. Chemical enhanced oil recovery is one of the major EOR methods that reduces the residual oil saturation by lowering water-oil interfacial tension (surfactant/alkaline) and increases the volumetric sweep efficiency by reducing the water-oil mobility ratio (polymer). In this chapter, the basic mechanisms of different chemical methods have been discussed including the interactions of different chemicals with the reservoir rocks and fluids. In addition, an up-to-date status of chemical flooding at the laboratory scale, pilot projects and field applications have been reported.

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Section: Polymer Floodingmentioning

confidence: 99%

Enhanced Oil Recovery: Chemical Flooding

Ragab¹,

Mansour²

2021

Geophysics and Ocean Waves Studies

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“…It was proved that the ASP flooding has improved oil recovery by 17.2% and recovery increment of SP flooding can reach 14.3% [11]. Despite the existing challenges, many researchers have studied the advances and technological method for polymer flooding in heavy oil reservoir [12][13][14] and the field application shows that the polymer flooding of heavy oils could result in incremental recoveries ranging from 7.5 to 25% OOIP [15]. Moreover, due to high demand for energy, polymer flooding has been successfully applied in offshore oil production in China [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing

et al. 2020

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Multilayer separate polymer injection in concentric dual-tubing is a special method for enhancing oil recovery in later development stage of the multilayer formation. During the injection process, heat exchange occurs among the inner tubing, tubing annulus and formation, making the thermal transfer process more complicated than traditional one. This work focuses on the polymer flowing characteristics during the multilayer separate polymer flooding injection process in the wellbore. A temperature–viscosity numerical model is derived to investigate the influencing factors on polymer dual-tubing injection process. Then, an estimate-correct method is introduced to derive the numerical solutions. Several influences have been discussed, including the axial temperature distribution, viscosity distribution, pressure drop, and flow pattern of polymer. Results show that under low injecting rates, below 5 m3/d, formation temperature will greatly decrease the polymer viscosity. When the injecting rates above 20 m3/d, the polymer just decreases 1–3 mPa·s at the bottom of well, which is really small. Additionally, the temperature distribution, the coefficient of friction under different injecting rates have been discussed. Generally, this method provides a new way to analyze thermal conductivity during the polymer injection process which is meaningful for polymer flooding in the oilfield application.

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“…Meanwhile, the high interface tension between oil and water makes it difficult to emulsify oil into water phase, which results in a low displacement efficiency . Different methods have been developed to increase oil recovery, including chemical flooding,, microbial flooding, foam flooding, etc. Among them, foam flooding shows great potential because foam has high apparent viscosity, so that it can enter the high‐permeablility layers, selectively block the water channels, improve wave coefficient and eventually force fluid to divert to low permeablility layers .…”

Section: Introductionmentioning

confidence: 99%

The Impact of Ionic Liquid and Nanoparticles on Stabilizing Foam for Enhanced Oil Recovery

et al. 2018

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One of the commonly used tool in enhance oil recovery (EOR) is nitrogen foam flooding. The sweeping efficiency is largely determined by the foam stability. Recently the study on using nanoparticle, alone or with other chemicals, to stabilize foam has emerged in several fields of foam application. In this study, we use a combination of physicochemical tools to analyze the synergetic effect of ionic liquid cetylpyridinium chloride (CPC) with nanoparticle in foam flooding of EOR. Two different nanoparticles (NPs), one hydrophilic and the other hydrophobic, are compared in terms of sweeping efficiency. It was found that CPC with hydrophilic NPs is much more effective in foam flooding residue oil than with hydrophobic NPs. This may be due to the difference in CPC orientation on NP surfaces, thus affecting the surface properties including surface tension, elasticity and contact angle. Consequently the stability of foam, which underpins the oil displacement efficiency in EOR, is influenced. The possible interaction and mechanism between CPC, NP and oil are discussed while considering the contribution from reduction of drainage rate, higher particle adsorption energy, and higher surface elasticity. Understanding the differential roles of hydrophilic and hydrophobic nanoparticles in ionic liquid stabilized foam as well as physical mechanism underpinning their specificity could help facilitate the development of new green nanomaterial in the application of EOR.

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Optimized polymer enhanced foam flooding for ordinary heavy oil reservoir after cross-linked polymer flooding

Cited by 20 publications

References 13 publications

Enhanced Oil Recovery: Chemical Flooding

Enhanced Oil Recovery: Chemical Flooding

Viscosity Loss and Hydraulic Pressure Drop on Multilayer Separate Polymer Injection in Concentric Dual-Tubing

The Impact of Ionic Liquid and Nanoparticles on Stabilizing Foam for Enhanced Oil Recovery

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