Effect of shearing actions on the rheological properties and mesostructures of CMC, PVP and CMC+PVP aqueous solutions as simple water-based drilling fluids for gas hydrate drilling

Zhang, Ling; Sun, Huiyu; Han, Bo; Peng, Li; Ning, Fulong; Jiang, Guosheng; Chehotkin, V.F.

doi:10.1016/j.juogr.2016.02.002

Cited by 25 publications

(14 citation statements)

References 58 publications

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“…The significant differences in the spatial mesostructures of the three different thickener solutions not only affect the spatial distribution and contents of the three different states of water (free water, weakly bound water, and strongly bound water) and the gas in the drilling fluid [37], but also affect the heat and mass transfer during hydrate formation and dissociation, which can affect the hydrate inhibition [18].…”

Section: Mesostructure Experimentsmentioning

confidence: 99%

“…Lower temperatures weaken the thermodynamic motion of the thickener hydrated molecules and the water molecules in the pore space. Moreover, the buffering effect of water molecules on the relative motion among thickener hydrated molecules becomes weaker, resulting in a more difficult relative motion between the thickener-hydrated molecules [18]. The thickening effect of the addition decreases in order of CMC, XG, and MS, due to the different aggregation degrees of the formed network skeletons aggregated in the thickener-hydrated molecule solution.…”

Section: Applicability Analysis Of the Three Thickeners In Different mentioning

confidence: 99%

“…Thus, hydrate drilling fluid requires both good hydrate inhibition and good rheology properties under considerable temperature variations and conditions. These two properties and the balance between them largely depend on the mesostructures of drilling fluids with thickener (an important part of the drilling fluid system) [18].…”

Section: Introductionmentioning

confidence: 99%

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Fundamental Investigation of the Effects of Modified Starch, Carboxymethylcellulose Sodium, and Xanthan Gum on Hydrate Formation under Different Driving Forces

et al. 2019

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The development of a new drilling fluid system with hydrate inhibition is of great significance for drilling safety in gas hydrate-bearing sediments. Considering the importance of the selection of a suitable thickener for drilling fluid systems under weak and strong driving forces, the hydrate inhibition of 0.1–0.5 wt% modified starch (MS), carboxymethylcellulose sodium (CMC), and xanthan gum (XG) aqueous solutions was studied. The applicability of these three thickeners were investigated through hydrate formation experiments, mesostructure observations, water activity tests, bubble retention observations, and rheological property tests. The results show that (1) under weak driving force, 0.3 wt% or higher concentration CMC and 0.3 wt% XG can almost completely inhibit hydrate formation due to the interactions between relatively small amounts of free water and CH4 molecules. Furthermore, the hydrate inhibition of higher XG concentrations was decreased due to their strong foam stability, leading to good contact between free water and CH4 molecules. Meanwhile, the hydrate inhibition of MS was weaker when compared with that of CMC and XG at the same concentrations. (2) Under strong driving force, the existence of the three 0.1–0.5 wt% thickeners could only slow down the hydrate formation rate, and hydrate inhibition due to XG was slightly better than that of the other two. This result implies that the effects of the different mesostructures on hydrate formation were severely weakened. Finally, (3) the tackifying effect of CMC was found to be stronger than that of XG and MS, and the rheological properties of the CMC solution were shown to be relatively weak compared to those of the XG and MS solutions; the CMC solution showed a more significant increase in viscosity with decreasing temperature, which is related to the differences in the mesostructures. Therefore, when the driving force of hydrate formation is relatively low, CMC is a good choice for the drilling fluid system when there is no requirement for cooling, while XG is more applicable for a system that needs cooling. In the case of a stronger driving force, XG is the optimal choice irrespective of whether the drilling fluid system needs cooling or not.

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Section: Mesostructure Experimentsmentioning

confidence: 99%

Section: Applicability Analysis Of the Three Thickeners In Different mentioning

confidence: 99%

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Fundamental Investigation of the Effects of Modified Starch, Carboxymethylcellulose Sodium, and Xanthan Gum on Hydrate Formation under Different Driving Forces

et al. 2019

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“…Shear‐thinning fluids are extensively used in petroleum engineering and soil remediation to improve the microscopic sweep of the reservoir through stabilization of the injection front [ Lake , ; Silva et al ., ; Wever et al, ]. For instance, shear‐thinning drilling fluids containing the biopolymer xanthan [ Zhong et al ., ; Truex et al ., ] and other polymers such as polyacrylamide [ Ball and Pitts , ], carboxymethyl cellulose [ Zhang et al ., ], and guar gum [ Hernández‐Espriú et al ., ] are widely used in EOR.…”

Section: Introductionmentioning

confidence: 99%

Flow of yield stress and Carreau fluids through rough‐walled rock fractures: Prediction and experiments

Castro

Radilla

2017

Water Resources Research

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Many natural phenomena in geophysics and hydrogeology involve the flow of non‐Newtonian fluids through natural rough‐walled fractures. Therefore, there is considerable interest in predicting the pressure drop generated by complex flow in these media under a given set of boundary conditions. However, this task is markedly more challenging than the Newtonian case given the coupling of geometrical and rheological parameters in the flow law. The main contribution of this paper is to propose a simple method to predict the flow of commonly used Carreau and yield stress fluids through fractures. To do so, an expression relating the “in situ” shear viscosity of the fluid to the bulk shear‐viscosity parameters is obtained. Then, this “in situ” viscosity is entered in the macroscopic laws to predict the flow rate‐pressure gradient relations. Experiments with yield stress and Carreau fluids in two replicas of natural fractures covering a wide range of injection flow rates are presented and compared to the predictions of the proposed method. Our results show that the use of a constant shift parameter to relate “in situ” and bulk shear viscosity is no longer valid in the presence of a yield stress or a plateau viscosity. Consequently, properly representing the dependence of the shift parameter on the flow rate is crucial to obtain accurate predictions. The proposed method predicts the pressure drop in a rough‐walled fracture at a given injection flow rate by only using the shear rheology of the fluid, the hydraulic aperture of the fracture, and the inertial coefficients as inputs.

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“…Polymer concentration [2] , salt content [3,4] , pH [5] , the presence of surfactant [6] , molecular structure [7] , Mw [8] and DS [9] exert important effects on CMC solution properties. This polysaccharide has been used in a wide range of applications in foods [10] , pharmaceutical products [11] , biomaterials [12] , cosmetics and electronic devices [13] , as well as in many oilfield operations, including drilling fluids [14,15] .…”

Section: Introductionmentioning

confidence: 99%

Effect of carboxymethylcellulose on colloidal properties of calcite suspensions in drilling fluids

et al. 2018

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Drilling fluids are multicomponent systems used to aid the removal of cuttings from a borehole, and subject to a number of requirements to ensure a safe drilling operation. One of the most important is to form a low permeability cake on the walls of the hole penetrated by the bit, to avoid excessive filtrate loss. To that end, carboxymethylcellulose (CMC) associated with calcite (CaCO 3) can be used. In this paper, the effect of carboxymethylcellulose on the colloidal properties of calcite suspensions in brine was systematically evaluated by rheological properties, filtrate volume and zeta potential. Higher viscosity fluids, lower filtrate loss and less negative zeta potential were obtained using small calcite particles with wide size distribution and CMC with high average molecular weight (Mw) and low average degree of substitution (DS), highlighting the importance of effective interactions between CMC and calcite to improve drilling fluid properties.

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Effect of shearing actions on the rheological properties and mesostructures of CMC, PVP and CMC+PVP aqueous solutions as simple water-based drilling fluids for gas hydrate drilling

Cited by 25 publications

References 58 publications

Fundamental Investigation of the Effects of Modified Starch, Carboxymethylcellulose Sodium, and Xanthan Gum on Hydrate Formation under Different Driving Forces

Fundamental Investigation of the Effects of Modified Starch, Carboxymethylcellulose Sodium, and Xanthan Gum on Hydrate Formation under Different Driving Forces

Flow of yield stress and Carreau fluids through rough‐walled rock fractures: Prediction and experiments

Effect of carboxymethylcellulose on colloidal properties of calcite suspensions in drilling fluids

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