Boehmite Based Sulphonated Polymer Nanoparticles with ImprovedSqueeze Performance for Deepwater Scale Control

Abstract

Polymeric scale inhibitors are widely used in the oil and gas field because of their better thermal stability and improved environmental compatibility. However, the squeeze performance of such inhibitors is typically poorer than that of the phosphonates type scale inhibitors in conventional squeeze treatment. In this research, a new method of delivering chemicals to formation has been developed. Polymeric scale inhibitor nanoparticles were developed for scale control. Boehmite (ɤ-AlO(OH)) nanoparticles (NPs) with particle size from 3 to 10 nm were used to cross-link sulphonated polycarboxylic acid (SPCA). Cross-linked polymeric scale inhibitors were synthesized and developed to increase their retention in formations by converting free flowing water-soluble scale inhibitors into a viscous gel. The viscosity of NPs-polymer gel systems can be manipulated by changing reaction conditions such as NP and polymer concentrations, pH, temperature and ionic strength. Polymer adsorbs to the NP surface via an ion exchange mechanism with hydroxyl group on boehmite. The adsorption and desorption behavior of scale inhibitors onto both nanoparticles and core materials are investigated at different pH and temperature values.

Review of Nanotechnology Impacts on Oilfield Scale Management

“…Yan et al continued his study of producing nontoxic environmentally friendly AlNPs and their use for enhancing squeeze lifetime performance by developing viscous solutions. − There are several methods used in the field for improving the squeeze lifetime . One of these methods is the use of viscous solutions or gels, such as xanthan-based viscous fluids.…”

Effect of Silica Nanoparticles on Polymer Adsorption Reduction on Marcellus Shale

“…Nanoparticles or their manipulations are very small materials, at the range of about 1–100 nanometers in diameter. − Recently, nanotechnology has been a significant focus in the petroleum industry because the addition of nanoparticles may change the properties of drilling fluid, strengthening sand consolidation, and improves drag reduction. − However, the role of nanoparticles in the reduction of polymer adsorption on shale surfaces has not been reported in the literature. In this paper, an investigation on the role of silica nanoparticles in the adsorption process on Marcellus shale samples is conducted.…”