Formation and stability of colloidal gas aphron based drilling fluid considering dynamic surface properties

Keshavarzi, Behnam; Javadi, Aliyar; Bahramian, Alireza; Miller, R.

doi:10.1016/j.petrol.2018.11.057

Cited by 22 publications

(8 citation statements)

References 26 publications

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“…Bjorndalen and Kuru [7] proposed the XG biopolymer to stabilize aphron and also mentioned that viscosity has the most impact on Aphrons stability. Keshavarzi et al [8] used three surfactants SDS, Triton X-100 and CAPB for investigation the formation and stability of CGAs. Their study reported that, CGAs made by SDS and CAPB surfactants have significant stabilities in contrast to the poor stability of Triton X-100.…”

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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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: 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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“…Despite the mentioned works on the influence of salts on CGA properties, none of these works have considered the presence of polymer although it is frequently used as viscosifier in CGA based drilling fluids. It also affects the surface behavior of surfactants [21] and enhances the stability of produced CGA systems [10,22]. Moreover, the reported salinities are mostly in the low range and the given results cannot be used for regular saline water systems.…”

Section: Introductionmentioning

confidence: 95%

“…However, this is not the case in region 1 in which no precipitation occurs. The little decrease in the half-life time in region 1 is due to viscosity reduction of the XG solution in presence of ions that directly influences the CGAs stability [22]. XG is an anionic polymer in which the viscosity is created as the result of repulsion forces between different molecules.…”

Section: Influence Of Nacl On Sds Made Cgasmentioning

confidence: 99%

“…This is done by studying the dynamic surface tension behavior of aqueous solutions of these surfactants in presence of XG as viscosifier and salt concentrations up to 40,000 ppm as well as performing tests for calculating the volume and half-life time of CGAs. It should be noted that both SDS and CAPB surfactants are utilized in the CGA formation and are proven to produce CGAs with good stability [22].…”

Section: Introductionmentioning

confidence: 99%

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Salt Effects on Formation and Stability of Colloidal Gas Aphrons Produced by Anionic and Zwitterionic Surfactants in Xanthan Gum Solution

Keshavarzi

Mahmoudvand

Javadi

et al. 2020

Colloids and Interfaces

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This work is devoted to the influence of NaCl salt concentration on the formation and stability of colloidal gas aphrons (CGA) produced by the anionic surfactant sodium dodecyl sulfate (SDS) and zwitterionic surfactant coco amido propyl betaine (CAPB) in the presence of xanthan gum (XG) as a stabilizer. Dynamic surface tension measurements as well as volume and half-life time of the produced foams are considered for stability analysis. A sharp decrease of the half-life time and volume of the CGAs at NaCl concentrations larger than 20,000 ppm was observed, which was attributed to the precipitation of SDS in the solution. The mentioned SDS precipitation altered the dynamic surface tension behavior, dilational surface elasticity, and turbidity of the solution. The main reason for the precipitation of SDS is the increased Krafft point caused by the addition of salt. However, for the zwitterionic surfactant CAPB, the effects of added NaCl on the interfacial properties required for CGAs production was negligible due to the simultaneous effects on the cationic and anionic head groups in the CAPB leading to negligible changes in the net repulsion forces. Yet, an overall reduction in the half-life time of CGAs with increasing salt concentration, even when we have no precipitation, was observed for both surfactants, which could be explained by the reduction in the ability of XG to increase the viscosity with increasing salt concentration.

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“…However, rheological models for such fluids have yet to be analyzed and compared in detail. Although the role of nanoparticles in improving the performance of drilling fluids has been observed, little attention has yet been paid to the effect of nanoparticles on the enhancement of properties of CGA-based drilling fluids, especially for such fluids incorporating natural surfactants in their formulations [59,60,39].…”

Section: Introductionmentioning

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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Formation and stability of colloidal gas aphron based drilling fluid considering dynamic surface properties

Cited by 22 publications

References 26 publications

Experimental Investigation of Water Based Colloidal Gas Aphron Fluid Stability

Experimental Investigation of Water Based Colloidal Gas Aphron Fluid Stability

Salt Effects on Formation and Stability of Colloidal Gas Aphrons Produced by Anionic and Zwitterionic Surfactants in Xanthan Gum Solution

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

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