A novel bio-based deflocculant for bentonite drilling mud

Hafshejani, Karim Samadzadeh; Moslemizadeh, Aghil; Shahbazi, Khalil

doi:10.1016/j.clay.2016.03.037

Cited by 35 publications

(24 citation statements)

References 42 publications

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“…The stability of colloidal suspensions of bentonite is, therefore, a function of the surface charge of bentonite and the pH of the aqueous system. Barry et al (2015) and Hafshejani et al (2016) illustrated the negative surface charge face and positive charge edge of bentonite clay platelet. Bourgoyne et al (1986) explained the mode of the interaction of hydrated bentonite which is due to the edge-toedge (E-E) and edge-to-face (E-F) associations caused by unbalanced net charges on the edge and surface of bentonite platelets.…”

Section: Introductionmentioning

confidence: 99%

An approach to improve the cuttings carrying capacity of nanosilica based muds

Elochukwu

Gholami

Dol

2017

Journal of Petroleum Science and Engineering

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Rheological and filtration properties of water based muds play vital roles in having a good drilling efficiency through hostile and harsh environments. However, there are many occasions in which controlling the variation of mud properties due to disintegration of additives is barely possible resulting in stuck pipe, kick incident or even loss of wells. The aim of this study is to propose an approach to enhance filtration characteristics of water based muds using nanoparticle additives. The results obtained from zeta potential measurements indicated that bentonite and nanosilica particles are both negatively charged with the values of-28 mV and-27 mV at the pH of 8 respectively. Evaluating rheological parameters of different mud samples revealed that the unmodified nanosilica causes reduction in the yield point of the samples rising concerns in the cuttings carrying capacity of drilling fluids. This issue was resolved by modifying the surface charge of nanosilica using a cationic surfactant. Filtration tests conducted under LPLT and HPHT conditions indicated that adding modified nanosilica into the mud samples results in formation of a thin and low permeability filter cake which can be a great asset in drilling through high permeable and small pore throat formations.

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Section: Introductionmentioning

confidence: 99%

An approach to improve the cuttings carrying capacity of nanosilica based muds

Elochukwu

Gholami

Dol

2017

Journal of Petroleum Science and Engineering

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“…The effectiveness of a clay swelling inhibitor can be characterized by determining the above rheological characteristics. For example, Moslemizadeh et al showed that deflocculants are able to lower the magnitudes of apparent viscosity, yield point, and gel strength (compared to the base/reference dispersion); however, they cannot decrease the extent of plastic viscosity . For an effective inhibitor, all of the aforementioned rheological properties should hold minimum values, depending on the inhibition potential.…”

Section: Resultsmentioning

confidence: 99%

“…At low concentrations, the surfactant molecules are in monomer form. Critical micelle concentration (CMC) is defined as the concentration in which the aggregates (e.g., micelles) begin to form in the solutions so that further increase in the surfactant concentration leads to an increase in micelle concentration while the concentration of monomers remains unchanged . The rheological lines for 1.5 g/g MLE (which is close to CMC) and 3 g/g MLE were almost overlapped, implying no inhibition improvement was experienced.…”

Section: Resultsmentioning

confidence: 99%

“…Critical micelle concentration (CMC) is defined as the concentration in which the aggregates (e.g., micelles) begin to form in the solutions so that further increase in the surfactant concentration leads to an increase in micelle concentration while the concentration of monomers remains unchanged. [58,59] The rheological lines for 1.5 g/g MLE (which is close to CMC) and 3 g/g MLE were almost overlapped, implying no inhibition improvement was experienced. The results suggest that the inhibitive property of MLE for suppressing clay hydration is more affected by the monomers than the micelles, proposing CMC as the optimum concentration.…”

Section: Sodium Bentonite Inhibition Testsmentioning

confidence: 96%

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A biosurfactant for inhibiting clay hydration in aqueous solutions: Applications to petroleum industry

et al. 2018

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The development of high performance and environmentally‐friendly clay stabilizers is still crucial to the drilling industry. This study aims to evaluate the impact of mulberry leaf extract (MLE), a biosurfactant as a clay stabilizer, on hydration of sodium bentonite in aqueous solutions. Several experimental techniques including sodium bentonite inhibition, sedimentation, filtration, zeta potential, particle size, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) are utilized in this study. Based on the results, MLE aqueous solution loads a larger amount of sodium bentonite in contrast to deionized water, leading to a low rheological profile. Sodium bentonite is not able to form a stable dispersion in the MLE aqueous solution. The capability of sodium bentonite to control the fluid loss is considerably lost upon exposure to the aqueous solutions of MLE. In the presence of MLE, the zeta potential of sodium bentonite dispersion shifts towards positive values, implying the instability of the water film surrounding the sodium bentonite particles. Sodium bentonite particles are larger in the MLE aqueous solution, representing a lower degree of particle delamination. A lower water content is observed in TGA for sodium bentonite modified by MLE. In SEM analysis, sodium bentonite particles show larger aggregates in the MLE aqueous solution. MLE aqueous solutions also have larger shale cuttings, in contrast to deionized water. All experiments confirm the promising features of MLE as an excellent clay stabilizer during drilling through clay rich shales. In addition to the superior performance in the drilling industry, MLE exhibits an environmentally‐friendly characteristic which is an asset for this biosurfactant.

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“…As an important industrial material, bentonite has been widely applied in agricultural, medical, and energy fields for decolorization, suspension, and stabilization [1,2,3]. During drilling for oil or gas, bentonite can effectively reduce the loss of the filtration of the water-based drilling fluid and improve the ability of the water-based drilling fluid to shear and carry cuttings [4,5]. Under deep stratum pressure, the water-based drilling fluid can quickly lose a substantial amount of water and form a thin film (mud cake), which consists mainly of bentonite, on the borehole [6].…”

Section: Introductionmentioning

confidence: 99%

Thermoresponsive Bentonite for Water-Based Drilling Fluids

Dong

Ren

et al. 2019

Materials

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As an important industrial material, bentonite has been widely applied in water-based drilling fluids to create mud cakes to protect boreholes. However, the common mud cake is porous, and it is difficult to reduce the filtration of a drilling fluid at high temperature. Therefore, this paper endowed bentonite with a thermo response via the insertion of N-isopropylacrylamide (NIPAM) monomers. The interaction between NIPAM monomers and bentonite was investigated via Fourier infrared spectroscopy (FTIR), isothermal adsorption, and X-ray diffraction (XRD) at various temperatures. The results demonstrate that chemical adsorption is involved in the adsorption process of NIPAM monomers on bentonite, and the adsorption of NIPAM monomers accords with the D–R model. With increasing temperature, more adsorption water was squeezed out of the composite when the temperature of the composite exceeded 70 °C. Based on the composite of NIPAM and bentonite, a mud cake was prepared using low-viscosity polyanionic cellulose (Lv-PAC) and initiator potassium peroxydisulfate (KPS). The change in the plugging of the mud cake was investigated via environmental scanning electron microscopy (ESEM), contact angle testing, filtration experiments, and linear expansion of the shale at various temperatures. In the plugging of the mud cake, a self-recovery behavior was observed with increasing temperature, and resistance was observed at 110 °C. The rheology of the drilling fluid was stable in the alterative temperature zone (70–110 °C). Based on the high resistance of the basic drilling fluid, a high-density drilling fluid (ρ = 2.0 g/cm3) was prepared with weighting materials with the objective of drilling high-temperature formations. By using a high-density drilling fluid, the hydration expansion of shale was reduced by half at 110 °C in comparison with common bentonite drilling fluid. In addition, the rheology of the high-density drilling fluid tended to be stable, and a self-recovery behavior was observed.

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A novel bio-based deflocculant for bentonite drilling mud

Cited by 35 publications

References 42 publications

An approach to improve the cuttings carrying capacity of nanosilica based muds

An approach to improve the cuttings carrying capacity of nanosilica based muds

A biosurfactant for inhibiting clay hydration in aqueous solutions: Applications to petroleum industry

Thermoresponsive Bentonite for Water-Based Drilling Fluids

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