Development and research of hydrocarbon-based process fluids for use in oil production processes
UDC: 622.276.6
DOI: -
Authors:
BATURIN NIKITA I.
1,
DMITRIEVA ALINA YU.1,
FATTAKHOV IRIK G.1,2,3,4,
PIMENOV ANDREY A.1
1 TatNIPIneft PJSC "TATNEFT" named after V.D. Shashin, Almetyevsk, Russia
2 Almetyevsk State Technological University "Higher School of Oil", Almetyevsk, Russia
3 Ufa State Petroleum Technological University, Ufa, Russia
4 Mechanical Engineering Institute named after A.A. Blagonravov, RAS, Moscow, Russia
Keywords: oil-free process fluid, oil-free inverse emulsion, high-viscous hydrophobic emulsion, rheological characteristics, dynamic viscosity, shear rate
Annotation:
The authors of the article study an oil-free process fluid for stimulating wells productivity. An oil-free emulsion has been developed that possesses the complete set of physical-chemical, rheological, structural-mechanical and technological parameters and properties required for rejecting low-viscous aqueous acid solutions in selective treatment technologies of the wellbore zone of porous-fractured-cavernous carbonate reservoirs. The authors confirmed the increased efficiency of acid treatments of formations wellbore zones, wells killing and water inflow limitation in particularly complicated geological conditions due to new hydrophobic emulsions that do not contain hydrocarbon components, which allow varying the structural-mechanical and viscous-rheological parameters over a wide range.
Based on the analysis of historical trends of emulsion-based process fluids development, theoretical and experimental studies, innovative compositions of emulsions that do not contain oil products have been developed. Their key advantage is a simplified formulation combined with the achievement of optimal physical-chemical, viscous and structural-mechanical characteristics. These unique properties, including thixotropy and stability, allow predicting high efficiency of using these emulsions for temporary isolation of cracks and caverns in carbonate reservoirs. The proposed formulations are promising for use in technologies that are applied for treating bottomhole zones in both vertical and horizontal wells, ensuring a formation reliable screening.
Herewith, for the first time, significant progress was achieved: commercial oil (the main product) was excluded from the hydrophobic emulsion formulation. It is planned to reduce material, labor and economic costs by optimizing repeated operations during treatment of near-wellbore zones of formations and killing of complicated wells.
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