Synthesis and characterization of shale stabilizer based on polyethylene glycol grafted nano-silica composite in water-based drilling fluids

Xu, Jiangen; Qiu, Zhengsong; Zhao, Xin; Zhong, Hanyi; Li, Gong-rang; Huang, Weian

doi:10.1016/j.petrol.2018.01.007

Cited by 85 publications

(29 citation statements)

References 27 publications

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“…The authors (Xu et al, 2018;Razali et al, 2018) recommend a combination of polyglycol and nanosilica as an effective inhibitor of hydration of active shale formation. Polyglycol makes a barrier to the penetration of water on the surface of the rock, while nanosilica penetrates into the pores of rocks displacing filtrate.…”

Section: Theoretical Discussionmentioning

confidence: 99%

New shale hydration inhibitors adapted to the downhole conditions

Zima

Badawczy²

2019

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The subject of the paper is the application of polyol compounds as active shale formation hydration inhibitors in drilling muds as the result of permanent interest from the industry in the use of this type drilling mud systems. Due to opportunity of precise compounds selection ensuring optimum properties of the drilling mud under specific down hole conditions, new agents have been developed that work effectively in a wider temperature range experienced in borehole conditions. The paper describes laboratory research carried over polyols that haven't been used in drilling fluids technology yet but may ensure optimal inhibition properties in the wide temperature range. Compounds belongs to polyglycols category like ethylene oxide or copolymers of ethylene oxide and propylene oxide with different molecular weight, are widely use so far. However, in the presented discussion other agents were used, which are products of ethoxylation and propoxylation of long-chain hydrocarbon fatty alcohols (10 and more carbon atoms). The main test that can prove drilling mud inhibitory properties is active shale dispersion investigation, routinely carried in ambient conditions. As part of the additional tests carried out, the influence of the inhibitors used on the active shale dispersion under elevated temperature conditions was determined in order to confirm the inhibitory properties of these agents in near-down hole conditions. Near down hole conditions test was also carried out on drilling muds containing polyols group compounds, ie resistance test to contamination with ions of divalent metals (Ca 2+ and Mg 2+), solid phase contamination (milled Miocene shale pretending drill cuttings) and increased temperature. Investigations were also carried out on clouding of polyol solutions in 7% KCl solution. The acquired results indicate that chemical compound presence of the hydrophobic chain derived from fatty alcohol in the molecule further increases the effectiveness of the rock hydration inhibitor. The results obtained during the study allowed for a better understanding of the inhibition mechanism of these agents on the active shale. The new rock hydration inhibitor developed as part of the work can be used in industrial conditions.

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Section: Theoretical Discussionmentioning

confidence: 99%

New shale hydration inhibitors adapted to the downhole conditions

Zima

Badawczy²

2019

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“…Several drilling fluids additives were employed as shale inhibitors from the last few decades to enhance drilling fluid inhibition properties. The reported shale inhibitors in the literature include polymers [ 25 , 26 , 27 ]; inorganic slats [ 28 ]; polymer nanocomposites [ 29 , 30 ]; glycols [ 31 , 32 ]; amines [ 33 , 34 ] and its derivatives, polymeric amines, dendrimers of amines [ 35 , 36 ], ionic liquids [ 37 ], nanoparticles [ 38 ], surface-modified nanoparticles [ 39 ], and surfactants [ 3 ]. The shale inhibition phenomenon is categorized into two classes, inhibition by physically sealing the micropores and small cracks, and chemical inhibition, in which inhibitor molecules encapsulate the shale surface to prevent the interaction of shale with water.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Clay Hydration and Swelling Inhibition Using Quaternary Ammonium Dicationic Surfactant with Phenyl Linker

et al. 2020

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Water-based drilling fluids are extensively used for drilling oil and gas wells. However, water-based muds cause clay swelling, which severely affects the stability of wellbore. Due to two adsorption positions, it is expected that cationic gemini surfactants can reduce the clay swelling. In this work, quaternary ammonium dicationic gemini surfactants containing phenyl linkers and different counterions (Cl− and Br−) were synthesized, and the effect of variation in counterions on swelling and hydration properties of shales was studied. Numerous water-based drilling fluid formulations were prepared with different concentrations of surfactants to study the swelling inhibition capacity of surfactants. The performance of surfactant-containing drilling muds was evaluated by comparing them with base drilling mud, and sodium silicate drilling mud. Various experimental techniques were employed to study drilling mud characteristics such as rheology and filtration. The inhibition properties of drilling mud formulations were determined by linear swelling experiment, capillary suction time test, particle size distribution measurement, wettability measurements, and X-ray Diffraction (XRD). Experimental results showed that surfactant-based formulation containing bromide counterion exhibited superior rheological properties as compared to other investigated formulations. The filtration test showed that the gemini surfactant with chloride counterion had higher filtrate loss compared to all other formulations. The bentonite swelling was significantly reduced with increasing the concentration of dicationic surfactants as inhibitors, and maximum reduction in the linear swelling rate was observed by using a formulation containing surfactant with chloride counterion. The lowest capillary suction timer (CST) was obtained in the formulation containing surfactant with chloride counterion as less CST indicated the enhanced inhibition capacity. The particle size measurement showed that average bentonite particle size increased upon the addition of surfactants depicting the inhibition capacity. The increase in basal spacing obtained from XRD analysis showed the intercalation of gemini surfactants in interlayers of bentonite. The contact angle measurements were performed to study the wettability of the bentonite film surface, and the results showed that hydrophobicity increased by incorporating the surfactants to the drilling fluid.

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“…To address the problem of water invasion, that is to reduce the filtration loss volume, many nanoparticles (NPs) have been used to plug the nanoscale pores and cracks in shale formation, such as nano-silica (Sensoy et al, 2009), aluminum salt (Liu et al, 2015), nano-emulsion (Xu et al, 2018a), and graphene (Aftab et al, 2016). Furthermore, much of the research has tended to focus on modified NPs that can largely reduce the swelling and hydration of shale through chemical interaction as well as physical plugging (Mao et al, 2015;Xu et al, 2018b;Zhong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Study of Janus Amphiphilic Graphene Oxide as a High-Performance Shale Inhibitor and Its Inhibition Mechanism

Huang

Zhou

et al. 2020

Front. Chem.

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Janus amphiphilic graphene oxide (JAGO), modified by dodecylamine on one side of graphene oxide (GO), was investigated for its novel use as a shale inhibitor. JAGO was synthesized by the Pickering emulsion template technology and was characterized by the Fourier-transform infrared spectra, UV-vis spectra, and transmission electron microscopy. Compared to KCl (5%), polyether diamine (2%), and pristine GO (0.2%), JAGO's highest shale recovery rate (75.2% at 80 • C) and lowest swelling height of Mt-pellets (2.55 mm, 0.2%) demonstrated its excellent inhibitive property. Furthermore, JAGO acted as a perfect plugging agent and greatly reduced filtration loss. Based on the results of X-ray diffraction, contact angle measurements, and pressure transmission tests, we proposed that the 2D nano-sheet amphiphilic structure of JAGO, which enabled it to be effective both in chemical inhibition and physical plugging, was responsible for its remarkable inhibition performances.

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Synthesis and characterization of shale stabilizer based on polyethylene glycol grafted nano-silica composite in water-based drilling fluids

Cited by 85 publications

References 27 publications

New shale hydration inhibitors adapted to the downhole conditions

New shale hydration inhibitors adapted to the downhole conditions

Evaluation of Clay Hydration and Swelling Inhibition Using Quaternary Ammonium Dicationic Surfactant with Phenyl Linker

Study of Janus Amphiphilic Graphene Oxide as a High-Performance Shale Inhibitor and Its Inhibition Mechanism

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