The Role of Surfactant Precipitation and Redissolution in the Adsorption of Sulfonate on Minerals

Somasundaran, P.; Çelik, M. S.; Goyal, Aditya; Manev, Emil D.

doi:10.2118/8263-pa

Cited by 37 publications

(25 citation statements)

References 8 publications

(5 reference statements)

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“…In other words, only aqueous phase exists in the pore space during the test. In this situation and in the absence of precipitation, the surfactant retention in the core is mainly attributed to adsorption (Somasundaran et al, 1984). The surfactant and polymer used for this study were selected based on a series of compatibility tests, including the compatibility with formation brine and seawater.…”

Section: Effluent Chemical Concentration Analysis and Adsorption Calcmentioning

confidence: 99%

Surfactant Adsorption in Surfactant-Polymer Flooding for Carbonate Reservoirs

Wang¹,

Han²,

Fuseni³

et al. 2015

SPE Middle East Oil &Amp; Gas Show and Conference

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Surfactant related chemical flooding has great potential for improving oil recovery in carbonate reservoirs, as surfactants are able to effectively lower the oil/water interfacial tension (IFT) and alter wettability toward water-wet. The loss of surfactant during the propagation process in the reservoir is one of the major concerns in determining the feasibility of a chemical flooding project. Many efforts have been made to reduce the surfactant adsorption in various scenarios to make the project economically successful. The addition of polymer in the chemical formulation is commonly used in the applications, which can not only be used to control the water/oil mobility ratio but also affect the surfactant adsorption in different ways.This paper presents the results of a laboratory study on the effect of polymer on reducing the surfactant adsorption onto carbonate reservoir cores. An amphoteric surfactant and a sulfonated polyacrylamide were used in three series of dynamic adsorption tests conducted at reservoir conditions, including surfactant only, polymer followed by surfactant, and mixture of surfactant and polymer (SP). The experimental results showed that when surfactant alone was injected, the surfactant adsorption on the carbonate reservoir cores ranged from 0.125 to 0.203 mg/g-rock, with an average value of 0.163 mg/g-rock. When the surfactant was injected following the injection of a pre polymer slug, the surfactant adsorption reduced to 0.0739 to 0.0848 mg/g-rock, with an average reduction of 51.3%. If SP mixture was injected, the surfactant adsorption ranged from 0.0794 to 0.0872 mg/g-rock, with an average reduction of 48.9%. It indicates that the adsorptions of surfactant and polymer take place competitively on the sites of the rock surfaces. This laboratory study helps understand the synergetic effect of surfactant and polymer in SP formulations and design the injection schemes of chemical flooding processes.

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Section: Effluent Chemical Concentration Analysis and Adsorption Calcmentioning

confidence: 99%

Surfactant Adsorption in Surfactant-Polymer Flooding for Carbonate Reservoirs

Wang¹,

Han²,

Fuseni³

et al. 2015

SPE Middle East Oil &Amp; Gas Show and Conference

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“…Surfactant adsorption at a solid/liquid interface has been studied for several decades due to its important role in an EOR process. A number of studies have been conducted on both ionic surfactant and anionic surfactant (Trogus et al, 1977;Lawson et al, 1978;Meyers et al, 1981;Somasundaran et al, 1984;Hong et al, 1990;Tabatabai et al, 1993;Kuhlman et al, 2000;Liu et al, 2003;Yin et al, 2009). The adsorption of surfactants from solution is affected by its physical-chemical properties such as pH (Dick et al, 1971;Fuerstenau et al, 1975;Baviere et al, 1993), temperature (Santanu et al, 2006;Ball et al, 1971), ionic strength (Baviere et al, 1993;Sophie et al, 2001), and electrolyte concentration (Santanu et al, 2006;Baviere et al, 1993;Atkina et al, 2003).…”

Section: Surfactant Adsorptionmentioning

confidence: 99%

Development of Isotherm Polymer/Surfactant Adsorption Models in Chemical Flooding

et al. 2011

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The injection of chemical solutions plays an important role in increasing the recovery factor of mature fields. For many reservoirs, polymer or surfactant flooding is an attractive alternative to conventional waterflooding; it can improve the area swept efficiency not only in the macro scale but also in the micro scale.Adsorption of polymer/surfactant on reservoir rock is an extremely important parameter for chemical flooding. Adsorption represents a loss of a chemical agent from solution, and consequently, a net reduction in the surfactant-polymer slug. Therefore, the efficiency of chemical flooding will be significantly diminished not only in technical aspects but also in terms of economics. However, adsorption is usually measured in laboratory scale with high uncertainties, and numerical simulation of multi-component adsorption is still limited. The adsorption process in a polymer/rock system has not yet been well developed, especially for highly heterogeneous reservoirs. In this paper, the polymer and surfactant adsorption processes are modeled by the Langmuir isotherm theory for various chemical flooding approaches including polymer, surfactant, micellar polymer and alkaline/surfactant/polymer flooding. The simulation results indicate that polymer adsorption strongly depends on the polymer concentration, shear rate, pH, salt concentration, and reservoir heterogeneity. An effective controlling of such parameters can reduce the effect of polymer adsorption so that it helps minimize mass of chemical loss and improve economic efficiency of the chemical flooding process.

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“…The abstraction maximum is caused by the surface precipitation of surfactant/multivalent ion complexes at sulfonate concentrations below the CMC, and their redissolution is caused by micellar solubilization above the CMC and redispersion of the coagulated colloids due to the development of charge from the adsorption of the ionic surfactants. The presence of hysteresis, on the other hand, is caused by the bulk precipitation, as opposed to surface precipitation, upon dilution Somasundaran et al, 1984).…”

Section: Effect Of Dissolved Mineral Speciesmentioning

confidence: 99%