A novel star-shaped copolymer as a rheology modifier in water-based drilling fluids

Luo, Zhihua; Wang, Longxiang; Pei, Jingjing; Yu, Panxi; Xia, Boru

doi:10.1016/j.petrol.2018.05.003

Cited by 35 publications

(27 citation statements)

References 22 publications

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“…From the literature, it has been recognized that YP/PV values should fall between 0.75 and 1.00 lbf/100 ft 2 /cP to guarantee effective wellbore cleaning while preventing an unwarranted increase in ECD. 58 , 59 Figure 15 presents the PV, AP, YP, and CC of the IL-based drilling fluid. All studied IL-based drilling fluids showed better cutting suspension ability and good wellbore cleaning except for Na 2 SiO 3 .…”

Section: Results and Discussionmentioning

confidence: 99%

Imidazolium-Based Ionic Liquids as Clay Swelling Inhibitors: Mechanism, Performance Evaluation, and Effect of Different Anions

et al. 2020

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Clay swelling is one of the challenges faced by the oil industry. Water-based drilling fluids (WBDF) are commonly used in drilling operations. The selection of WBDF depends on its performance to improve rheology, hydration properties, and fluid loss control. However, WBDF may result in clay swelling in shale formations during drilling. In this work, the impact of imidazolium-based ionic liquids on the clay swelling was investigated. The studied ionic liquids have a common cation group, 1-allyl-3-methyllimidozium, but differ in anions (bromide, iodide, chloride, and dicyanamide). The inhibition behavior of ionic liquids was assessed by linear swell test, inhibition test, capillary suction test, rheology, filtration, contact angle measurement, scanning electron microscopy, and X-ray diffraction (XRD). It was observed that the ionic liquids with different anions reduced the clay swelling. Ionic liquids having a dicyanamide anion showed slightly better swelling inhibition performance compared to other inhibitors. Scanning electron microscopy images showed the water tendency to damage the clay structure, displaying asymmetrical cavities and sharp edges. Nevertheless, the addition of an ionic liquid to sodium bentonite (clay) exhibited fewer cavities and a smooth and dense surface. XRD results showed the increase in d-spacing, demonstrating the intercalation of ionic liquids in interlayers of clay. The results showed that the clay swelling does not strongly depend on the type of anion in imidazolium-based ILs. However, the type of anion in imidazolium-based ILs influences the rheological properties. The performance of ionic liquids was compared with that of the commonly used clay inhibitor (sodium silicate) in the oil and gas industry. ILs showed improved performance compared to sodium silicate. The studied ionic liquids can be an attractive alternative for commercial clay inhibitors as their impact on the other properties of the drilling fluids was less compared to commercial inhibitors.

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Section: Results and Discussionmentioning

confidence: 99%

Imidazolium-Based Ionic Liquids as Clay Swelling Inhibitors: Mechanism, Performance Evaluation, and Effect of Different Anions

et al. 2020

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“…The commonly used additives are anionic polyelectrolytes, which are bound on the surfaces of bentonite particles, thereby prohibiting the agglomeration of the clay particles and keeping the suspensions stable. Such anionic polyelectrolytes are lignosulfonate complexes with various types of metals, tannins, humic acids, lignites and synthetic polymers (Zhang & Yin, 2002; Luo et al , 2018). However, the aforementioned additives have inherent shortcomings, as they can undergo thermal degradation at high temperatures (Wan et al , 2011; Oyewole et al , 2013; Dias et al , 2015).…”

Section: The Role Of Temperaturementioning

confidence: 99%

Clay minerals in drilling fluids: functions and challenges

Zhang

Christidis

et al. 2020

Clay miner.

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The addition of clay minerals in drilling fluids modifies the dispersion's viscosity. In this article, scientific advances related to the use of clays and clay minerals (bentonite, palygorskite, sepiolite and mixtures of clay minerals) in drilling fluids are summarized and discussed based on their specific structure, rheological properties, applications, prevailing challenges and future directions. The rheological properties of drilling fluids are affected by the temperature, type of electrolytes, pH and concentration of clay minerals. Bentonites are smectite-rich clays often used in drilling fluids, and their composition varies from deposit to deposit. Such variations significantly affect the behaviour of bentonite-based drilling fluids. Palygorskite is suitable for use in oil-based drilling fluids, but the gelation and gel structures of palygorskite-added drilling fluids have not received much attention. Sepiolite is often used in water-based drilling fluids as a rheological additive. Dispersions containing mixtures of clays including bentonite, kaolin, palygorskite and sepiolite are used in drilling fluids requiring specific features such as high-density drilling fluids or those used in impermeable slurry walls. In these cases, the surface chemistry–microstructure–property relationships of mixed-clay dispersions need to be understood fully. The prevailing challenges and future directions in drilling fluids research include safety, ‘green’ processes and high-temperature and high-pressure-resistant clay minerals.

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“…) 13,18–21 and synthetic polymers 22–24 is widely used as filtrate reducers of WBDFs. However, the thermal degradation and aging of natural polymers above 150°C make controlling of rheological and filtration properties of WBDFs impossible, especially under high‐temperature and high‐pressure (HTHP) conditions 25–27 . In contrast, synthetic multi‐copolymers have attracted more and more attention due to their excellent performance at HTHP environment compared with natural polymers.…”

Section: Introductionmentioning

confidence: 99%

“…However, the thermal degradation and aging of natural polymers above 150 C make controlling of rheological and filtration properties of WBDFs impossible, especially under high-temperature and high-pressure (HTHP) conditions. [25][26][27] In contrast, synthetic multicopolymers have attracted more and more attention due to their excellent performance at HTHP environment compared with natural polymers. Many studies have shown that multi-copolymers of 2-acrylamide-2-methyl propane sulfonic acid are the most commonly used because of their excellent temperature and salt resistance.…”

Section: Introductionmentioning

confidence: 99%

Terpolymer with rigid side chain as filtrate reducer for water‐based drilling fluids

Yang

Liu

et al. 2020

J of Applied Polymer Sci

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Synthetic copolymers as filtrate reducers for water‐based drilling fluids (WBDFs) are difficult to meet the needs of drilling engineering only by changing the type and proportion of functional groups of copolymers, especially under ultra‐high temperature and high salinity. In this study, an anionic terpolymer (named PSDI) with rigid side chain was synthesized using sodium p‐styrenesulfonate, N, N‐Dimethylacrylamide, and itaconic acid by free‐radical copolymerization. The chemical structure of PSDI was characterized by Fourier transform infrared spectroscopy and 1H‐NMR spectrum. The high‐temperature/high‐pressure filtration loss (FLHTHP) and the American Petroleum Institute filtration loss (FLAPI) of the WBDFs containing 1.5 wt/vol% PSDI were 35.0 and 17.0 ml after thermal rolling at 240°C for 16 h, respectively. The FLHTHP and FLAPI of the WBDFs containing saturated NaCl were with control of 60.0 and 12.0 ml. The FLAPI of WBDFs containing 1.5 wt/vol% CaCl2 reduced to 6.0 ml. Results indicate that the addition of PSDI can improve the anti‐high‐temperature performance and resistance to salt and calcium contamination of WBDFs. Results of rheological tests through fitting four rheological models suggest that rheological parameters can be improved as a result of forming the spatial network structure between the PSDI and bentonite flakes.

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A novel star-shaped copolymer as a rheology modifier in water-based drilling fluids

Cited by 35 publications

References 22 publications

Imidazolium-Based Ionic Liquids as Clay Swelling Inhibitors: Mechanism, Performance Evaluation, and Effect of Different Anions

Imidazolium-Based Ionic Liquids as Clay Swelling Inhibitors: Mechanism, Performance Evaluation, and Effect of Different Anions

Clay minerals in drilling fluids: functions and challenges

Terpolymer with rigid side chain as filtrate reducer for water‐based drilling fluids

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