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Issue
Name
Authors
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2019/1
Study of Potassium Formate-Based Drilling Fluid Influence on Core-Samples’ Permeability Characterized by AHFP.
Geosciences

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 is specialist in drilling and completion fluids. E-mail: daria.guseva@yandex.ru
Sergey V. KOSTESHA graduated from Saratov State University in 2002 with a degree in industrial chemicals of drilling fluids and oil processing. He is author of “Colloid Chemistry of Drilling fluids”, a study guide for students and drilling fluid engineers, 2000.
E-mail: skostesha@mail.ru

Abstract: Formation drilling in abnormally high formation pressure zones adversely affects well construction efficiency.
The application of barite-free potassium formate-based drilling fluid ensures high-quality wellbore cleaning and minimizes the irreversible process of formation damage.
The impact of potassium formate-based drilling fluid and oil-based drilling fluid on core samples permeability was assessed, the applicability of drill-in fluids mentioned above was validated

Index UDK: 622.245.549

Keywords: potassium formate, return permeability, abnormally high formation pressure, weighted drilling fluids

Bibliography:
1. Ovchinnikov V.P., Aksenova N.A., Grosheva T.V., Rozhkova O.V. Contemporary drilling fluid compositions: Workbook. Tyumen: TyumGNGU, 2013, 156 p.
2. Ryazanov Ya.A. Drilling Fluids Encyclopedia. Orenburg: Publisher “Letopis”, 2005, 664 р.
3. Nediljka Gaurina-eEðimurec, Borivoje Pasic, Katarina Simon, Davorin Matanovic, Matija Malnar. Formate-Based Fluids: Formulation and Application, Rudarsko-geološko-naftni zbornik. Zagreb, 2008, р. 41-49.
4. Downs J.D., Howard S.K., Carnegie A. Improving Hydrоcarbon Production Rate Through the Use of Formate Fluids — SPE 97694, 2005.

2017/3
Study of biopolymer-drilling fluid influence on core-samples permeability and estimation of enzyme-breaker efficiency
Geosciences

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

Bibliography:
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.