Salt Deposits and Brine Blowout: Development of a Cross-Linking Composition for Blocking Formations and Methodology for Its Testing

Mikhail Dvoynikov (), Dmitry Sidorov (), Evgeniy Kambulov, Frederick Rose and Rustem Ahiyarov
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Mikhail Dvoynikov: Arctic Competence Center, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Dmitry Sidorov: Arctic Competence Center, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Evgeniy Kambulov: Arctic Competence Center, Saint Petersburg Mining University, 199106 Saint Petersburg, Russia
Frederick Rose: Institut für Bohrtechnik und Fluidbergbau, TU Bergakademie Freiberg, D-09599 Freiberg, Germany
Rustem Ahiyarov: Center for Technological Development of the Fuel and Energy Complex, Ufa State Petroleum Technological University, 450062 Ufa, Russia

Energies, 2022, vol. 15, issue 19, 1-20

Abstract: Uncontrolled inflow of formation fluid (brine) into a well adversely affects the cation–anion bonds in solutions and leads to their dissociation and loss of aggregative stability. Blow-out significantly complicates the drilling process and leads to an increase in non-productive time and in financial costs for problem solving. It is necessary to create a blocking screen that allows separation of the layer from the well and prevents brine flow. This article is devoted to the development of polymeric-blocking compositions that work due to the crystallization reaction of divalent salts of calcium and magnesium chlorides. More than 14 components were detected in the formation fluid on the atomic emission spectrometer. Based on the study of the compatibility of components with brine and the study of rheology and filtration processes through a real core under HPHT conditions, the optimal component polymer composition was selected. The reason for the increase in the rheology of composition during its thickening was established. With the help of tomographic studies, the depth of penetration of the filtrate into the core of layers was determined. For further studies, an experimental stand was designed for physical simulation of the isolation process under HPHT conditions and backpressure from the formation.

Keywords: formation isolation; polysalt aggression; polymer systems; elimination of complications; blowout; drilling wells; cross-linked polymers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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