Minimization shale hydration with the combination of hydroxyl-terminated PAMAM dendrimers and KCl

Zhong, Hanyi; Qiu, Zhengsong; Tang, Zhichuan; Zhang, Xin; Zhang, Daoming; Huang, Weian

doi:10.1007/s10853-016-0108-0

Cited by 34 publications

(17 citation statements)

References 55 publications

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“…This result was consistent with the results of linear swelling and hot‐rolling tests. All results suggested the strong inhibitive effect of the combination of gelatin and salts on inhibiting hydration and swelling of reactive clays, which was also in accordance with previously reported findings …”

Section: Resultssupporting

confidence: 93%

“…Considering the designed rules proposed by Suter et al . for clay hydration inhibitors, as well as the molecular structure of gelatin, multiple hydroxyl groups in gelatin are helpful to disrupt the hydrogen bindings between water molecules and siloxane of clay mineral surface and display good inhibition . The previous work have also studied the potential inhibition performance of gelatin .…”

Section: Introductionmentioning

confidence: 99%

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Improved shale hydration inhibition with combination of gelatin and KCl or EPTAC, an environmentally friendly inhibitor for water‐based drilling fluids

Jiang

Zhu

et al. 2019

J of Applied Polymer Sci

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An effective and environmentally friendly shale hydration inhibitor is essential to develop high‐performance water‐based drilling fluid with good environmental properties. For this purpose, and to minimize shale hydration under satisfactory environmental profit, composites of gelatin and inorganic salt (KCl) or organic salt (2, 3‐epoxypropyl‐trimethylammonium chloride, EPTAC) were prepared as environmentally friendly shale inhibitors to perfect the inhibitive effect. The inhibitive properties of the composites were evaluated by comparison with pure gelatin and common inhibitors. Results suggested that when 2.0 wt % gelatin and 1.0 wt % salt were combined, the composites reduced the swelling height of montmorillonite (Mt) to <1.70 mm, improved shale recovery to 80% at 150 °C and inhibited 16.0 wt % Mt mud‐making, thereby displaying excellent inhibition performance. Moreover, the gelatin composite with EPTAC seemed to perform better synergistic inhibition than that with KCl. The underlying inhibitive mechanisms were also investigated by measuring interlayer space through X‐ray diffraction, observing aggregation through electron microscopy, comparing hydrophobic modification degree by water contact angle measurement, and determining the zeta potential and water activity. The gelatin composites presented lower water activity and effectively prevented water from invading Mt. In these composites, gelatin mainly adsorbed on the surface of Mt particles, encapsulated Mt particles, and improved their hydrophobic property to a certain degree, whereas the salts entered the interlayer, expelled water, and decreased the interlayer space. Consequently, the combinations of gelatin and KCl or EPTAC had an excellent effect on inhibiting shale hydration. This study can also provide new insights into the design of totally environmentally friendly additives for water‐based drilling fluid. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47585.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Improved shale hydration inhibition with combination of gelatin and KCl or EPTAC, an environmentally friendly inhibitor for water‐based drilling fluids

Jiang

Zhu

et al. 2019

J of Applied Polymer Sci

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“…The control of β‐CD‐HBP‐OH to osmotic hydration was uniform and effective, showing a decreasing tendency of Zeta potential absolute from −40.9 mV to −13.4 mV. Similarly, the same phenomenons were reported using hydroxyl‐terminated polyamidoamine, which decreased the Zeta potential absolute from −40.0 mV to −15.0 mV . However, β‐CD‐HBP‐OH achieved better inhibition to osmotic hydration by providing more terminal hydroxyl groups with larger molecular weight.…”

Section: Resultssupporting

confidence: 61%

The Structure and Properties of a Novel Hydroxyl‐Terminated Hyperbranched Polymer for Inhibiting Shale Hydration

Wang

2019

ChemistrySelect

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To inhibit the hydration and dispersion of shale, a hydroxyl‐terminated hyperbranched polymer (β‐CD‐HBP‐OH) was synthesized by the green raw materials: β–cyclodextrin and glycerol carbonate. The chemical structure of β‐CD‐HBP‐OH was characterized by the Fourier transform infrared spectroscopy (FT‐IR), nuclear magnetic resonance spectroscopy (1H‐NMR and 13C‐NMR) and gel permeation chromatography (GPC). As an inhibitor, β‐CD‐HBP‐OH possessed smaller hydrodynamic radius with less chain entanglement, demonstrating favourable rheology properties. The dominated hyperbranched structure and terminal hydroxyl groups of β‐CD‐HBP‐OH improved the inhibition by uniform adsorption and bridging. The recovery rates of shale cuttings were higher than 50% when β‐CD‐HBP‐OH exceed 1 wt %. The Zeta potential absolute values of the base slurry were reduced from 40.9 mV to 13.4 mV by β‐CD‐HBP‐OH's adsorption. The particle size of the base slurry was also increased from 2.017 μm to 4.026 μm by bridging effect. The results of thermogravimetric analysis (TGA) suggested β‐CD‐HBP‐OH decreased the water content of bentonite from 8.04% to 0.59%. Upon scanning electron microscope (SEM) images, more assemble bentonite aggregates were observable after β‐CD‐HBP‐OH treatment. Finally, the interaction between bentonite and β‐CD‐HBP‐OH was further confirmed by the FT‐IR spectrum and the X‐ray diffraction (XRD) spectrum.

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“…The rheological properties of the OBMs are measured with a ZNN-D6 six-speed rotational viscometer at different temperatures [9,10]. The apparent viscosity (AV), plastic viscosity (PV), yield point (YP), gel strength after 10 min standing (10-min Gel) and 6 r/min reading (θ6 reading) can be obtained.…”

Section: Methodsmentioning

confidence: 99%

Flat-rheology oil-based drilling fluid for deepwater drilling

Zhao¹,

Qiu²,

Xu³

et al. 2017

IJHT

Self Cite

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In offshore deepwater drilling, the temperature is rather low near the seabed. The resulting thickening of conventional oil-based drilling fluid causes increase in equivalent circulating density. When the density surpasses the formation fracture pressure gradient, a series of problems, including lost circulation, may occur, causing huge economic losses. A desirable drilling fluid is desperately needed to solve the rheology-related problems. In view of this, this paper analyzes how oil-based drilling fluid acquires the flat-rheology characteristics, and selects preferred additives, e.g. base oil, emulsifier, organic clay and weighting materials, based on their effects on the rheological properties of drilling fluid. On this basis, the author successfully synthetizes a rheology modifier and develops a flat-rheology oil-based drilling fluid. The performance of the proposed drilling fluid is experimentally evaluated. The results indicate that the variations of the yield point, 10-min gel and θ6 reading of the proposed drilling fluid are controlled within 25% in the temperature range of 4-75 ℃ when the density is below 2.1 g/cm 3 . Besides, the proposed drilling fluid boasts good shale inhibition and filtration performance as well as strong contamination resistance to NaCl, CaCl2 and drill cuttings. In this way, this paper provides a desirable solution to rheology-related problems in deepwater drilling.

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Minimization shale hydration with the combination of hydroxyl-terminated PAMAM dendrimers and KCl

Cited by 34 publications

References 55 publications

Improved shale hydration inhibition with combination of gelatin and KCl or EPTAC, an environmentally friendly inhibitor for water‐based drilling fluids

Improved shale hydration inhibition with combination of gelatin and KCl or EPTAC, an environmentally friendly inhibitor for water‐based drilling fluids

The Structure and Properties of a Novel Hydroxyl‐Terminated Hyperbranched Polymer for Inhibiting Shale Hydration

Flat-rheology oil-based drilling fluid for deepwater drilling

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