Methods and compositions of piperazine-based viscoelastic surfactants as diversion agents

US11739255B2 · kind B2 · utility

Assignees

• SAUDI ARABIAN OIL COMPANY · SA
• KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS · SA

Inventors

• Rajendra Arunkumar Kalgaonkar · Dhahran, SA
• Mohammed Abudullah Bataweel · Dhahran, SA
• Eyad Alali · Dammam, SA
• Nisar Ullah · Dhahran, SA
• Muhammad Mansha · Dhahran, SA

Key dates

• Filing date: Nov 12, 2021
• Grant date: Aug 29, 2023
• Expiry date: Nov 12, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/30
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A wellbore fluid including a first surfactant, a second surfactant, an activator and an aqueous base fluid is provided. The first surfactant has a structure represented by Formula (I): where Y1, Y2, Y3, Y4 are each, independently, a sulfonate, a carboxylate, an ester or a hydroxyl group, m is an integer ranging from 2 to 3, and n, o, and k are each, independently, integers ranging from 2 to 10. The second surfactant has a structure represented by Formula (III): where R2 is a C15-C27 hydrocarbon group or a C15-C29 substituted hydrocarbon group, R3 is a C1-C10 hydrocarbon group, and p and q are each, independently, an integer ranging from 1 to 4. A method of using the wellbore fluid for treating a hydrocarbon-containing formation is also provided.