Self-emulsifying water shutoff agent based on fumed silica nanoparticles for high temperature horizontal gas wells. (2nd January 2021)

• Record Type: Journal Article
• Authors: Sun, Xiangyu; Ge, Jijiang; Zhang, Guicai; Jiang, Ping; Pei, Haihua
• Is Part Of: Petroleum science and technology. Volume 39:Number 1(2021)
• Page Start: 1
• Page End: 10
• Publication Date: 2021-01-02
• Subjects: High temperature -- horizontal gas well -- nanoparticles -- self-emulsification -- water shutoff -- wettability reversal; Liquid fuels -- Periodicals; Petroleum -- Periodicals; 665.505
• DOI: 10.1080/10916466.2020.1828459
• Languages: English
• ISSNs: 1091-6466

Abstract

Abstract: Excessive water production by high temperature (>140 °C) horizontal gas wells sharply decreases productivity. To date, no effective water shutoff agent has been developed to address this problem. In this study, a nanoparticle-reinforced active oil system that can be spontaneously emulsified under Tahe Formation conditions was constructed. The nanoparticles enhanced the water shutoff performance of the system by migrating to the oil-water interface and attaching to the formation surface; this decreased the water permeability to 6.25% of the pure active oil water shutoff under conditions of gas reservoir formation, thus achieving better efficacy and selectivity.