Experimental Study of Gel Particles Transport Through Porous Media

Al-Ibadi, Adnan; Civan, Faruk

doi:10.2118/153557-ms

Cited by 14 publications

(5 citation statements)

References 10 publications

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“…The preformed particle gels, which were prepared by using an initiator, acrylamide monomer, cross-linker, and additive had also been used to improve the water injection profile. − These powdered millimeter-sized gel particles can be obtained from crushing and then sieving dry gels, which can swell several fold in water to form a suspension. These particle gels can tolerate high salinity and high temperature and are suitable to improve the development effect of oilfields with strong heterogeneity, high water-cut, and large porous channels. − However, they have no defined shape and surface plugging can easily form, because of their large size…”

Section: Introductionmentioning

confidence: 99%

Selectivity of Pore-Scale Elastic Microspheres as a Novel Profile Control and Oil Displacement Agent

et al. 2012

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Pore-scale elastic microspheres were prepared controllably and their swelling property, stability, and creeprecovery property in brine water were analyzed in laboratory. The goal of the research was to study the selectivity of the porescale elastic microspheres as a novel profile control (water injection profile modification) and oil displacement agent. The matching factor between particle size of elastic microspheres and pore throat diameter of sand pack model was introduced to characterize their matching relationship. The results indicate that the optimal matching factor is 1.35−1.55. Besides, the profile control and oil displacement effect were studied using a series of heterogeneous double-tube sand pack models with optimal matching factors. The shunt flow experiments show that when the matching factor is an optimal value, the elastic microspheres prefer to plug the high-permeability layer selectivity and almost do not clog the low-permeability layer. The oil displacement experiments show that the elastic microspheres have the characteristic of plugging water without plugging oil and can improve the sweep status and oil displacement effect of low-permeability layer and low-permeability area in the high-permeability layer. According to the experimental results and actual situation of Block Liu 28-1, an optimal program for the profile control and oil displacement of elastic microspheres was proposed and conducted. The results show that the elastic microspheres can improve the water injection profile effectively. The results also confirm that the matching factor is an appropriate measure to evaluate the profile control and oil displacement effect of elastic microspheres and to guide the field test.

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Section: Introductionmentioning

confidence: 99%

Selectivity of Pore-Scale Elastic Microspheres as a Novel Profile Control and Oil Displacement Agent

et al. 2012

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“…Until now, no model has accounted for the time dependence of deposition. Thus, the time dependence of permeability impairments due to asphaltene based on two or three mechanisms that are acting simultaneously as an improvement to Al-lbadi and Civan’s model is proposed. The mechanisms considered are pore surface deposition, plugging, cake formation, and asphaltene entrainment due to high velocity in a low-permeability reservoir.…”

Section: Permeability Impairmentmentioning

confidence: 99%

Impact of Asphaltene Precipitation and Deposition on Wettability and Permeability

et al. 2021

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Asphaltene precipitation and deposition have been a formation damage problem for decades, with the most devastating effects being wettability alteration and permeability impairment. To this effect, a critical look into the laboratory studies and models developed to quantify/predict permeability and wettability alterations are reviewed, stating their assumptions and limitations. For wettability alterations, the mechanism is predominantly surface adsorption, which is controlled by the asphaltene contacting minerals as they control the surface chemistry, charge, and electrochemical interactions. The most promising wettability alteration evaluation techniques are nuclear magnetic resonance, ζ potential, and the use of high-resolution microscopy. The integration of such techniques, which is still missing, would reinforce the understanding of asphaltene interaction with rock minerals (especially clays), which holds the key to developing a strategy for modeling wettability alteration. With regard to permeability impairment, surface deposition, pore plugging, and fine migration have been identified as the dominant mechanisms with several models reporting the simultaneous existence of multiple mechanisms. Existing experimental findings showed that asphaltene deposition is non-uniform due to mineral distribution which further complicates the modeling process. It also remains a challenge to separate changes due to adsorption (wettability changes) from those due to pore size reduction (permeability impairment).

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“…The injected fluid tends to flow along the thief zones where little oil remains, which leads to ineffective circulation. , The low-permeability zones that are not well swept by the injected fluid become the main enriched zone of the remaining oil . Therefore, for high water cut oilfields, reducing the water absorption in the high-permeability zones and allocating more displacing fluid into the low-permeability zones to further recover the remaining oil have become long-standing problems for many petroleum professionals. , To address this problem, various chemical flooding methods have been performed in many mature oilfields in the world. − …”

Section: Introductionmentioning

confidence: 99%

Determination of Permeability Contrast Limits for Applying Polymer Solutions and Viscoelastic Particle Suspensions in Heterogeneous Reservoirs

Zhou

Zhao

et al. 2022

Energy Fuels

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Polymers and viscoelastic particles are the main chemical agents used to improve water injection profile and thus increase oil production. In actual formations, however, there is a lack of knowledge on selecting an appropriate chemical agent to achieve excellent conformance control and oil production performance. To address this issue, this paper first investigated the main rheological properties and resistance increase performance of the two chemical agents. After that, the permeability contrast limits for applying polymer solution and viscoelastic particle suspension in heterogeneous reservoirs were determined through shunt flow experiments. The critical impact of permeability contrast limits on chemical enhanced oil recovery (EOR) was further verified via a two-dimensional (2D) visualized oil displacement experiment. It was found that the particles exhibit superior elasticity, while the polymers mainly exhibit a viscosity increase effect. The resistance increase capacity of the particle suspension in the core was more potent than that of the polymer solution, which results in its excellent conformance control in strongly heterogeneous cores. On the contrary, the polymer solution might face the risk of failure. The permeability contrast limits for applying the two chemical agents at different concentrations were determined. Visualized oil displacement experiments showed that the EOR by polymer flooding in strongly heterogeneous reservoirs is quite low (3.3%). In contrast, the particle suspension could effectively expand the swept zone and extract considerable remaining oil in the low-permeability zones. Accordingly, the EOR could reach 7.1%. Determining permeability contrast limits is of practical significance for selecting suitable chemical agents to realize successful conformance control and oil extraction in heterogeneous reservoirs.

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Experimental Study of Gel Particles Transport Through Porous Media

Cited by 14 publications

References 10 publications

Selectivity of Pore-Scale Elastic Microspheres as a Novel Profile Control and Oil Displacement Agent

Selectivity of Pore-Scale Elastic Microspheres as a Novel Profile Control and Oil Displacement Agent

Impact of Asphaltene Precipitation and Deposition on Wettability and Permeability

Determination of Permeability Contrast Limits for Applying Polymer Solutions and Viscoelastic Particle Suspensions in Heterogeneous Reservoirs

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