A review of the usage of deep eutectic solvents as shale inhibitors in drilling mud

Rasool, Muhammad Hammad; Ahmad, Maqsood; Ayoub, Muhammad; Zamir, Asif; Abbas, Muhammad Adeem

doi:10.1016/j.molliq.2022.119673

Cited by 24 publications

(14 citation statements)

References 67 publications

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“…The criteria address the components having higher hydrogen bond count and containing polar functional groups are prone to give better shale inhibition. More details regarding this criterion can be read in our previous work [39]. Further elaboration on Ascorbic acid and Glycerine are provided in Section 3.1.…”

Section: Methodsmentioning

confidence: 99%

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A Novel Ascorbic Acid Based Natural Deep Eutectic Solvent as a Drilling Mud Additive for Shale Stabilization

et al. 2023

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During drilling, almost 70% of wellbore instability issues result from the encountering of shale formations. Various additives such as salts, silicates, and polymers are used in water-based mud to enhance its shale-inhibition capability; however, such additives have certain limitations. Lately, ionic liquids and deep eutectic solvents (DES) have been used by various research groups as shale inhibitors in drilling fluid due to their biodegradability and efficacy. However, their popularity faded when a natural derivative of DES, i.e., Natural Deep Eutectic solvent (NADES), came into the picture. This research utilizes the in-house-prepared Ascorbic acid and Glycerine (AA:Gly)-based NADES as a drilling fluid additive for shale inhibition and compares its efficacy with counterpart inhibitors such as KCl, imidazolium-based ionic liquid, and Choline Chloride-based DES. The results show that 3% NADES improved the overall Yield point to Plastic viscosity ratio, with a 39.69% decline in mud cake thickness and a 28% decline in the filtrate volume of drilling mud. Along with improved drilling fluid properties, 3% NADES resulted in 77.77% shale inhibition and 87% shale recovery. Surface tension, d-spacing, zeta potential, and FESEM have been conducted to justify and elucidate the inherent mechanism behind the working of NADES as a drilling fluid additive and clay stabilizer. Thus, Ascorbic acid-based NADES is recommended as a potential non-toxic and cheap drilling fluid additive to improve drilling fluid properties and clay stability.

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Section: Methodsmentioning

confidence: 99%

“…M.H. Rasool et al (2022) used a double action P-D inhibitor combination of Potassium carbonate-based DES and Poly (2-ethyl-2-Oxazoline) hydroxyl-terminated polymer in drilling mud, resulting in 76% swelling inhibition [34].…”

Section: Introductionmentioning

confidence: 99%

A Novel Ascorbic Acid Based Natural Deep Eutectic Solvent as a Drilling Mud Additive for Shale Stabilization

et al. 2023

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“…In general, few research studies have examined the impact of DES components on their inhibitory effectiveness; their inhibitory effectiveness may differ depending on the HBA and HBD used. 32 In this study, ammonium salts of different alkyl chain lengths were used as hydrogen bonding receptors, and four kinds of DESs were prepared from ethylene glycol (EG) as HBDs to evaluate their effects as shale inhibitors of water-based drilling fluids. The study evaluated the inhibition performance of the DES using various tests, including linear expansion tests, shale cutting rolling recovery, and rheological properties tests.…”

Section: Introductionmentioning

confidence: 99%

“…All of these studies demonstrate that DESs are an effective treatment agent to alleviate the instability of shale formation. In general, few research studies have examined the impact of DES components on their inhibitory effectiveness; their inhibitory effectiveness may differ depending on the HBA and HBD used …”

Section: Introductionmentioning

confidence: 99%

Deep Eutectic Solvents with Different Alkyl Chain Lengths as Inhibitors for Shale in Water-Based Drilling Fluids

Ao,

Lin,

Ren

et al. 2024

Energy Fuels

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Traditional drilling operations have relied on water-based drilling fluids, but shale's sensitivity to water poses several challenges, such as wellbore instability. To address this issue, four kinds of deep eutectic solvents (DESs) were prepared with varying alkyl chain lengths to prevent shale hydration expansion. FT-IR and proton NMR were used to analyze the structure of these DESs. To evaluate the inhibitory properties of the DESs, a series of tests were conducted, including the linear expansion test, the shale rolling recovery experiment, and the rheological properties test. The results showed that DESs were effective in preventing shale expansion due to hydration, and the results were compared to the properties of potassium chloride. Various analysis methods were adopted to understand the interaction mechanism between the clay particles and DESs, including the zeta potential test, particle size analysis, and X-ray diffraction determination. The analysis revealed that DESs can adsorb on the clay surface through electrostatic attraction and hydrogen bonding, compress the clay's electric double layer, and prevent surface hydration. Moreover, DESs can reduce the osmotic hydration as they can enter the clay layer and lower the clay layer spacing. The results indicated that DESs have the potential to be a promising shale inhibitor.

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“… 1 Shale is used as source and reservoir rock, and 75% of drilling formations for oil and gas resources are in shale formation. 2 As the main component of shale, clay minerals, mainly composed of montmorillonite, will expand when they encounter water, causing wellbore safety problems. 3,4 Although clay minerals in shale are not hydrated in oil-based drilling fluids (OBDFs), OBDFs have problems such as high cost, non-biodegradability, and being harmful to environmental health.…”

Section: Introductionmentioning

confidence: 99%

A novel choline chloride/graphene composite as a shale inhibitor for drilling fluid and the interaction mechanism

Zhu

Zhang

et al. 2022

RSC Adv.

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A review of the usage of deep eutectic solvents as shale inhibitors in drilling mud

Cited by 24 publications

References 67 publications

A Novel Ascorbic Acid Based Natural Deep Eutectic Solvent as a Drilling Mud Additive for Shale Stabilization

A Novel Ascorbic Acid Based Natural Deep Eutectic Solvent as a Drilling Mud Additive for Shale Stabilization

Deep Eutectic Solvents with Different Alkyl Chain Lengths as Inhibitors for Shale in Water-Based Drilling Fluids

A novel choline chloride/graphene composite as a shale inhibitor for drilling fluid and the interaction mechanism

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