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Study of biopolymer-drilling fluid influence on core-samples permeability and estimation of enzyme-breaker efficiency

Authors: Daria M. GUSEVA is currently a postgraduate student at the Drilling Department of Gubkin Russian State University of Oil and Gas (National Research University). She specializes in drilling and completion fluids. E-mail: daria.guseva@yandex.ru
Sergey A. KRAVTSOV graduated from Gubkin Russian State University of Oil and Gas in 2008 as a Candidate of Technical Sciences. He has published 7 research papers. E-mail: sergey.kravtsov2@bakerhughes.com
Servgey V. TEMNIK graduated from Gubkin Russian State University of Oil and Gas in 2006. He is specialist in drilling and completion fluids. E-mail: temnserv@gmail.com

Abstract: Penetration of the drilling mud filtrate, the solid phase and the drilling mud proper in the process of well-completion reduces the filtration and capacitance properties of the productive formation. One way to solve this problem is to use chemical agents to destroy the components of the drilling mud and restore the original reservoir quality. The paper describes a lab experiment carried out to justify the application of the enzyme-breaker filter cake clean-up system at Suzun field. The efficiency of the enzyme-breaker application for a uniform and full filter cake clean-up is evaluated. The suggestions for pilot tests are made

Index UDK: 622.245.514

Keywords: enzyme, return permeability, filter cake clean-up

1. Varfolomeev S.D. Chemical Enzymology: Manual. M.: Publishing office «Academy», 2005, 480 p.
2. Hisham A. Nasr-El-Din, Mohammed Badri Al-Otaibi, Abdulqader A. Al-Qahtani, Omar A. Al-Fuwaires. Filter-Cake Cleanup in MRC Wells Using Enzyme/Surfactant Solutions, SPE, 2006.
3. Thomas E. Suhy, Ramon P. Harris Application of Polymer Specific Enzymes To Clean Up Drill-In Fluids, SPE, 1998.