Wellbore fluid comprising a base fluid and a particulate bridging agent

US7854277B2 · kind B2 · utility

Assignee

• BP EXPLORATION OPERATING COMPANY LIMITED · GB

Inventors

• Simon Neil Duncum · Bracknell, GB
• Christopher Alan Sawdon · Par, GB

Key dates

• Filing date: Jan 10, 2007
• Grant date: Dec 21, 2010
• Expiry date: Jun 13, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/18
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Wellbore fluid containing a base fluid and a particulate bridging agent comprised of melamine. A method is also described of forming a removable filter cake on the walls of a wellbore that penetrates a porous and permeable rock formation by placing in the wellbore a wellbore fluid containing a base fluid and melamine, and permitting the melamine to deposit from the wellbore fluid onto or into the walls of the wellbore to form the filter cake, whereby fluid loss to the formation through the removable filter cake is reduced.