Rheology, stability and filtration characteristics of Colloidal Gas Aphron fluids: Role of surfactant and polymer type

Tabzar, Amir; Arabloo, Milad; Ghazanfari, Mohammad Hossein

doi:10.1016/j.jngse.2015.07.014

Cited by 32 publications

(18 citation statements)

References 25 publications

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“…The resistance of fluid against the degree of dispersion, liquid content and bubble size alteration can be considered as the main index of CGA based drilling fluids stability [11]. According to DOE results, as shown in Figure 2 and Table 4, polymer type significantly affected the stability values and surfactant type has the lowest effect on stability.…”

Section: Stability Of Cgasmentioning

confidence: 99%

“…Their study reported that, as the polymer and surfactant concentration increases, the yield point, plastic viscosity (which will be named in this paper as viscosity) and apparent viscosity of CGA based drilling fluids increase. Tabzar et al [11] investigated various bio-polymers including Carboxy Methyl Cellulose (CMC), Starch and Xanthan Gum and two types of surfactant, namely Cetyl Trimethyl Ammonium Bromide (CTAB) and Sodium Dodecyl Sulphate (SDS) to make aqueous CGA drilling fluids. The outputs of their research showed that a mixture of XG and SDS has a great performance in decreasing filtration loss and improvement of stability of CGAs.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Water Based Colloidal Gas Aphron Fluid Stability

Hosseini-Kaldozakh

Khamehchi

Dabir

et al. 2019

Colloids and Interfaces

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Today, the drilling operators use the Colloidal Gas Aphron (CGA) fluids as a part of drilling fluids in their operations to reduce formation damages in low-pressure, mature or depleted reservoirs. In this paper, a Taguchi design of experiment (DOE) has been designed to analyse the effect of salinity, polymer and surfactant types and concentration on the stability of CGA fluids. Poly Anionic Cellulose (PacR) and Xanthan Gum (XG) polymers are employed as viscosifier; Hexadecyl Trimethyl Ammonium Bromide (HTAB) and Sodium Dodecyl Benzene Sulphonate (SDBS) have been also utilized as aphronizer. Moreover, bubble size distributions, rheological and filtration properties of aphronized fluids are investigated. According to the results, the polymer type has the highest effect, whereas the surfactant type has the lowest effect on the stability of CGA drilling fluid. It was also observed that increasing salinity in CGA fluid reduces the stability. Finally, it should be noted that the micro-bubbles generated with HTAB surfactant in an electrolyte system, are more stable than SDBS surfactant.

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Section: Stability Of Cgasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Water Based Colloidal Gas Aphron Fluid Stability

Hosseini-Kaldozakh

Khamehchi

Dabir

et al. 2019

Colloids and Interfaces

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“…In particular, XG's viscosification contributions to CGA-based fluids are well known in providing them with stability [31]. On the other hand, starch is more useful in controlling fluid losses in water-based drilling fluids [34]. Starch can be obtained from many crop plants such as oat, potato, rice, wheat and yucca [47].…”

Section: Methodsmentioning

confidence: 99%

“…The stability of CGA-based fluids considers their fluid-resistance capabilities versus bubble size, liquid components and/or dispersion. The contrasting density between the liquid components of the fluids and the bubbles results in the liquid settling downwards due to gravitational effects and the bubbles rising upwards through the fluids [34]. Here, the stability of the stability of the Olea-nano-CGA-based fluids is experimentally tested in terms of its Silica nanoparticles are connected to each other through hydroxyl groups (OH-) located on their surfaces.…”

Section: Stability Of the Prepared Gca-based Fluidsmentioning

confidence: 99%

Effectiveness of Colloidal Gas Aphron Fluids Formulated with a Biosurfactant Enhanced by Silica Nanoparticles

Tabzar¹,

Sadatshojaie

Wood³

2020

Preprint

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<p>At-balance drilling technology applications demand the use of special drilling fluids, For example, colloidal-gas-aphron fluids (CGA) are being deployed to good effect in drilling applications. GCA-based drilling fluids have physico-chemical attributes that enable them to usefully influence and control downhole conditions. Furthermore, the involvement of nanoparticles and surfactants in their formulations enhances the performance and stability of CGA suspensions. This study describes the stability analysis, rheological characterization and filtration properties of CGA suspensions for the novel eco-friendly biosurfactant, <i>Olea europaea </i>(common olive), in presence of nanoparticles. Filtration and stability analysis was performed using API filtration tests and the static drain-rate technique, respectively. Several rheological models are developed to quantify the shear-flow characteristics of Olea-nano-based CGA suspensions. The Herschel-Bulkley and the Mizhari-Berk models provided the best shear-flow prediction accuracy with very small error values in terms of root mean squared error. Results reveal that the introduction of the biosurfactant improves the CGA-based fluid properties. Moreover, the observed improvements are further enhanced by including silica and fumed silica nanoparticles in the formulations. The Olea-nano-CGA-based fluids exhibit non-Newtonian behavior. The rheology of CGA-based fluids depends upon base-fluid viscosity, as it does in aqueous polymeric foams. The optimum concentrations of nanoparticles in Olea-nano-based CGA fluids is identified to provide them with fluid-flow indices ranging between 0.15 and 0.30. </p>

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“…One inner shell supports the gaseous core and separates it from a viscous water phase. Then, a double surfactant layer maintains this whole structure isolated from the aqueous bulk [3][4][5]. Physicochemical properties of both surfactant (ionic or nonionic) and viscosifier (usually a polymer) control thickness and viscosity of the viscous phase.…”

Section: Introductionmentioning

confidence: 99%

Aphrons Obtained From Different Nonionic Surfactants: Properties and Filtration Loss Evaluation

Gomes¹,

Alves²,

Nunes³

et al. 2017

ChChT

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Abstract.1 Aphrons were produced using nonionic surfactants by applying a differential pressure. Bubble size distribution was obtained from optical microscopy using FIJI-ImageJ2 program. The aim of this work was to correlate surfactants structures with aphrons properties (density and viscosity), size distribution and the number of bubbles. API fluid loss tests were based on standard proceedings specifications for water-based drilling fluids of Petrobras/Brazil. The structure of the nonionic surfactants showed a great influence on the fluid properties and the performance of the fluid contributing with a filtrate reduction up to 31% with the systems that were presented between 1088 and 1850 bubbles with diameters ranging from 33 to 104µm. These systems were produced by poly(ethylene oxide) with 7 ethylene oxide units, a poly(ethylene oxide)-b-poly(propylene oxide) with 6 ethylene oxide units and 3 propylene oxide units.

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Rheology, stability and filtration characteristics of Colloidal Gas Aphron fluids: Role of surfactant and polymer type

Cited by 32 publications

References 25 publications

Experimental Investigation of Water Based Colloidal Gas Aphron Fluid Stability

Experimental Investigation of Water Based Colloidal Gas Aphron Fluid Stability

Effectiveness of Colloidal Gas Aphron Fluids Formulated with a Biosurfactant Enhanced by Silica Nanoparticles

Aphrons Obtained From Different Nonionic Surfactants: Properties and Filtration Loss Evaluation

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