Electropositive production well treating fluid and method of preparing the same

US7323434B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• Exploration & Production Research Institute, Sinopec · CN
• China Petro-Chemical Corporation Shengli Petroleum Administrative Bureau · CN

Inventors

• Changming Su · Beijing, CN
• Rushan Liu · Beijing, CN
• Weiping Xu · San Diego, US
• Zengchen Guan · Dongying, CN
• Peizhi Yu · Beijing, CN
• Xiushan Liu · Beijing, CN
• Jiafen Li · Beijing, CN
• Baoyu Guo · Dongying, CN
• Yingchun Cui · Beijing, CN
• Caixuan Guo · Dezhou, CN
• Jing Li · Toronto, CA

Key dates

• Filing date: Nov 21, 2003
• Grant date: Jan 29, 2008
• Expiry date: Dec 27, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/24
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An electropositive and water-based production well treating fluid system exhibits electropositivity by using a cationic viscosifier meanwhile matched with a cationic fluid loss additive and, optionally, contains a mud-building agent, an electrical stabilizing agent, a colloid-stabilizing agent, lubricant, an oil layer protective agent and/or a weighting agent. The electropositive production well treating fluid can beffer solve the contradiction of technical requirements between “treating fluid stability” and “bore hole stability”, and features a strong ability to inhibit the dispersion of clay, a good effect of protecting oil-gas reservoirs, fast drilling speeds, regular shape of bore holes and good resistance to salt.