Hydrodynamic Analysis and Cake Erosion Properties of a Modified Water-Based Drilling Fluid by a Polyacrylamide/Silica Nanocomposite during Rotating-Disk Dynamic Filtration

Abstract

In this study, the potential of using a polyacrylamide-silica nanocomposite (PAM-S) to control the filtration properties of bentonite water-based drilling muds under different salinity conditions was evaluated. Static filtration tests under low-pressure/low-temperature (LPLT) conditions accompanied by rheological measurements have been carried out to analyze the role of silica nanoparticles (NPs) and nanocomposites (NCs) in the base fluid properties. Moreover, high-pressure/high-temperature (HPHT) static filtration was also investigated to evaluate the thermal stability of PAM-S. Afterward, dynamic filtration has been conducted in a filtration cell equipped with an agitating system with a disk-type impeller to investigate the hydrodynamic and formation of a filter cake under shear flow conditions. Fluid flow velocity and wall shear stress (WSS) distribution over the filter cake were analyzed using an exact 3D computational fluid dynamic (CFD) simulation. A transparent filtration cell with a camera was used to accurately record the fluid flow field inside the filter press and validate the CFD results. The obtained results indicated that adding silica NPs at a concentration of less than 2 wt % increases the fluid loss due to reducing rheological properties such as yield point. While silica NPs could not significantly change the mud properties, the experimental results showed that, under both LPLT and HPHT conditions, the PAM-S NC could reduce the total filtration loss by 70% at a low concentration of 0.75 wt %. Moreover, during dynamic filtration, the results indicated that there is a linear relationship between the cake thickness and the inverse of WSS at different operating pressures. However, no correlation could be found between predeposited mud cake erosion and WSS. At a rotating disk speed of 1000 rpm, more than 60% of the predeposited mud cake was eroded after 30 min for a saline mud sample while for the NC-treated mud sample cake erosion is considerably reduced and reaches up to 20% at 1.5 wt % PAM-S.

Optimization of Water Based Drilling Fluid Properties with the SiO2/g-C3N4 Hybrid

“…The mud cake thickness and fluid loss volume are the two important parameters that are measured in this type of experiment. The substantial amount of fluid loss volume is a damaging aspect for drilling fluids since it may lead to many problems, such as formation damage and instability of wellbore. , The resulting pressure is effectively directed toward the formation at any point along the wellbore. This is because of the ongoing overbalance used to stop kicks from the formation.…”

“…61 Base mud YP was calculated to be 20 and 12 lb/100 ft 2 BHR and AHR, respectively. Figure 5d 62 Due to the particle bridging effect created by the interaction of polar functional groups such as −OH, etc., situated in favorable locations to work with appealing interacting layers for having a high attraction to water. 3.5.4.…”

Temporary Well Plugging for Future CO2 Storage: CT Analysis of Thermal Sensitive Polymer-Gel Dynamics in Low-Permeability Chalk

“…1. Among them, acrylamide (AM) is one of the most popular, as it can be synthetized as a partial hydrolysed and anionic polymer for use as viscosifier or gelation agent [8][9][10][11][12]. In this work, polyacrylamide was synthetized and modified by Hoffman rearrangement followed by adding the Glutaraldehyde crosslinker to the solution at constant value.…”

Preparation and Application of New Polyhydroxy Ammonium Shale Hydration Inhibitor

“…Polyhydroxy-alkanolamine inhibitors can provide multiple adsorption sites on a montmorillonite surface and enhance the adsorption of inhibitors on the montmorillonite surface [14,15]. The binding of montmorillonite is mainly realized through hydrogen bonding, anchoring, electrostatic adsorption Processes 2023, 11, 3102 2 of 17 and hydrophobic action, which effectively inhibits the hydration, swelling and dispersion of montmorillonite [16][17][18]. At present, polyhydroxy-alkanolamines have excellent compatibility with traditional additives and can meet the requirements of environmental protection.…”