Fluid loss control

US8016040B2 · kind B2 · utility

Assignee

• SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

• Syed A. Ali · Sugar Land, US
• Mohan K.R. Panga · Missouri City, US
• John W. Still · Katy, US
• Gary John Tustin · St Ives, GB
• Balkrishna Gadiyar · Katy, US

Key dates

• Filing date: Nov 26, 2008
• Grant date: Sep 13, 2011
• Expiry date: Nov 26, 2028

Classification

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

Abstract

A fluid loss control method uses a fluid loss control pill in a well in advance of a completion operation. An embodiment of the fluid loss control pill comprises polyester solids that are hydrolysable and can exhibit plastic deformation at formation conditions. An embodiment of the method comprises spotting the fluid loss control pill in the well adjacent to a formation to form a filtercake to inhibit fluid entry from the well into the formation, performing a completion operation comprising contacting the filtercake with overbalanced wellbore fluid, and degrading the filtercake wherein the polyester particles are hydrolyzed to remove formation damage.