Method to characterize fracture plugging efficiency for drilling fluids

US8524638B2 · kind B2 · utility

Assignee

• Halliburton Energy Services, Inc. · US

Inventors

• Sandeep D. Kulkarni · Alpharetta, US
• Sharath Savari · Hyderabad, IN
• Arunesh Kumar · Jamkhed, IN
• Matthew L. Miller · Houston, US
• Robert J. Murphy · Milford, US
• Dale E. Jamison · Humble, US

Key dates

• Filing date: Aug 22, 2012
• Grant date: Sep 3, 2013
• Expiry date: Aug 22, 2032

Classification

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

Abstract

A method for determining a Plug Normal Stress Difference (ΔN1(P)) may include providing a test base drilling fluid that is characterized by N1(TB); adding a first concentration of a test particulate to the test base drilling fluid; adjusting the concentration of the test particulate in the test base drilling fluid to achieve a minimum concentration of the test particulate in the test base drilling fluid that will substantially plug a tapered slot, wherein the test base drilling fluid with the minimum concentration of the test particulate is characterized by N1(TA); and calculating ΔN1(P)=|N1(TA)|−|N1(TB)| wherein each First Normal Stress Difference is measured by the same procedure.