Synthesis of a novel cationic hydrophobic shale inhibitor with preferable wellbore stability

Lv, Kaihe; Liu, Jia; Jin, Jiafeng; Sun, Jinsheng; Huang, Xianbin; Liu, Jingping; Guo, Xuan; Hou, Qilin; Zhao, Jianwei; Liu, Kesong; Wang, Jintang; Bai, Yingrui

doi:10.1016/j.colsurfa.2022.128274

Cited by 17 publications

(5 citation statements)

References 34 publications

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“…Actually, although previously invented inhibitors and encapsulators could decrease wellbore rock hydration to a very low level, the wellborestabilizing effect is still limited because of the inevitable contact between the drilling fluid and wellbore rock caused by the capillary force. If the rock surface could be hydrophobic or even amphiphobic, the capillary force will be inverted, the drilling fluid's self-absorption will be avoided, and the hydration of the wellbore rock will be further decreased to a great extent (Sheen et al, 2010;Zhang et al, 2011b;Ensikat et al, 2011;Lee et al, 2013;Li et al, 2016b;Lei et al, 2021a;Lv et al, 2022;. The problem of reservoir damage and wellbore instability will thus be solved more completely.…”

Section: Amphiphobic High-efficiency Pdfmentioning

confidence: 99%

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Jiang

Dong

et al. 2023

Front. Energy Res.

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Unconventional gas includes tight sandstone gas, shale gas, coalbed methane, and natural gas hydrate. With huge reserves, unconventional gas has become the most important natural gas resource successor after the end of the “Easy Oil era.” The drilling fluid is an indispensable wellbore working fluid for unconventional gas drilling with multiple functions. The polymer drilling fluid (PDF) is the most common, longest developed, and most diverse drilling fluid type. With advantages of easily controlled rheology, convenient on-site performance maintenance, and specifically low cost and weak environment pollution, the PDF is gradually replacing the oil-based drilling fluid as the first choice for unconventional gas drilling. The invention of the non-disperse low-solid-content PDF in the 1960s shows that PDF technology has entered the stage of scientific development, and until now, its development has generally experienced five stages: beginning, developing, improving, re-developing, and re-improving. Dozens of polymer additives and PDF systems have been invented and applied, which have solved severe drilling problems, greatly improved drilling efficiency, and promoted exploration and development in difficult oil and gas resources. This paper first reviews the research progress of PDF technology according to the timeline by introducing the composition, feature, advantages, and disadvantages of some representative polymer additives and PDF systems, emphatically the function and mechanism of stabilizing wellbores, lubricating drilling tools, and protecting reservoirs of the biomimetic wellbore-strengthening PDF and amphiphobic high-efficiency PDF in unconventional gas drilling. Then, combining future global demands, especially China’s strategic needs of oil and gas exploration and development, the development tendency of PDF technology is critically illustrated by introducing several potential research directions including intelligent PDF, ecological PDF, and PDF for natural gas hydrate and deep layer gas resources.

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Section: Amphiphobic High-efficiency Pdfmentioning

confidence: 99%

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Jiang

Dong

et al. 2023

Front. Energy Res.

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“…The inhibitory performance is superior to commonly used shale inhibitors. Lv et al [24] synthesized a hydrophobic cationic shale inhibitor ADD. The results indicate that ADD has good performance in inhibiting shale expansion and dispersion.…”

Section: Introductionmentioning

confidence: 99%

Acylated Inulin as a Potential Shale Hydration Inhibitor in Water Based Drilling Fluids for Wellbore Stabilization

Lv,

Shen,

Sun

et al. 2024

Molecules

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Shale hydration dispersion and swelling are primary causes of wellbore instability in oil and gas reservoir exploration. In this study, inulin, a fructo-oligosaccharide extracted from Jerusalem artichoke roots, was modified by acylation with three acyl chlorides, and the products (C10-, C12-, and C14-inulin) were investigated for their use as novel shale hydration inhibitors. The inhibition properties were evaluated through the shale cuttings hot-rolling dispersion test, the sodium-based bentonite hydration test, and capillary suction. The three acylated inulins exhibited superb hydration-inhibiting performance at low concentrations, compared to the commonly used inhibitors of KCl and poly (ester amine). An inhibition mechanism was proposed based on surface tension measurements, contact angle measurements, Fourier-transform infrared analysis, and scanning electron microscopy. The acylated inulin reduced the water surface tension significantly, thus, retarding the invasion of water into the shale formation. Then, the acylated inulin was adsorbed onto the shale surface by hydrogen bonding to form a compact, sealed, hydrophobic membrane. Furthermore, the acylated inulins are non-toxic and biodegradable, which meet the increasingly stringent environmental regulations in this field. This method might provide a new avenue for developing high-performance and ecofriendly shale hydration inhibitors.

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“…This phenomenon reduces the strength of the wellbore and causes other problems such as bit balling, sloughing, pipe sticking, loss circulation, and/or the loss of the entire drilling assembly [ 14 , 15 ]. Hence, shale swelling and clay hydration are widely regarded as the primary cause of wellbore instabilities and can cause a cataclysmic failure such as well blowout when not properly managed, thereby resulting in the significant economic loss [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Surfactant Having One Degree of Unsaturation in the Hydrophobic Tail as a Shale Swelling Inhibitor

et al. 2023

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One of the foremost causes of wellbore instability during drilling operations is shale swelling and hydration induced by the interaction of clay with water-based mud (WBM). Recently, the use of surfactants has received great interest for preventing shale swelling, bit-balling problems, and providing lubricity. Herein, a novel synthesized magnetic surfactant was investigated for its performance as a shale swelling inhibitor in drilling mud. The conventional WBM and magnetic surfactant mixed WBM (MS–WBM) were formulated and characterized using Fourier Transform Infrared (FTIR) and Thermogravimetric analyzer (TGA). Subsequently, the performance of 0.4 wt.% magnetic surfactant as shale swelling and clay hydration inhibitor in drilling mud was investigated by conducting linear swelling and capillary suction timer (CST) tests. Afterward, the rheological and filtration properties of the MS–WBM were measured and compared to conventional WBM. Lastly, the swelling mechanism was investigated by conducting a scanning electron microscope (SEM), zeta potential measurement, and particle size distribution analysis of bentonite-based drilling mud. Experimental results revealed that the addition of 0.4 wt.% magnetic surfactant to WBM caused a significant reduction (30%) in linear swelling. SEM analysis, contact angle measurements, and XRD analysis confirmed that the presence of magnetic surfactant provides long-term swelling inhibition via hydrophobic interaction with the bentonite particles and intercalation into bentonite clay layers. Furthermore, the inhibition effect showed an increase in fluid loss and a decrease in rheological parameters of bentonite mixed mud. Overall, the use of magnetic surfactant exhibits sterling clay swelling inhibition potential and is hereby proffered for use as a drilling fluid additive.

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Synthesis of a novel cationic hydrophobic shale inhibitor with preferable wellbore stability

Cited by 17 publications

References 34 publications

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Research progress and development tendency of polymer drilling fluid technology for unconventional gas drilling

Acylated Inulin as a Potential Shale Hydration Inhibitor in Water Based Drilling Fluids for Wellbore Stabilization

A Magnetic Surfactant Having One Degree of Unsaturation in the Hydrophobic Tail as a Shale Swelling Inhibitor

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