Investigation of the effect of water physical-chemical composition on the sand-bearing properties of hydraulic fracturing liquids
UDC: 622.234.573
DOI: -
Authors:
NASYBULLIN ARSLAN V.
1,
GAYFULLIN TIMUR L.1,
ALENKIN ILYA A.1,
ZAKIROV RINAT R.1
1 Almetyevsk State Technological University "Petroleum Higher School", Almetyevsk, Russia
Keywords: hydraulic fracturing, fracturing liquid, process liquid, component composition, sand-carrying capacity, proppant, fracture-propping material
Annotation:
The authors of the article present the results of laboratory studies aimed at determining the influence of water physical-chemical composition on the sand-carrying properties of hydraulic fracturing liquids used when developing terrigenous reservoirs. Particular attention is paid to studying the impact of concentrations of bicarbonate ions (HCO3–) and calcium ions (Ca²+) as well as the temperature mode on the rheological properties of guar-borate gels and their ability to suspend proppant throughout the entire technological process. The experimental part of the work was carried out by modeling fracturing fluids with varying concentrations of the specified components at temperatures of 15, 25 and 35 °C. In the course of the study a consistent decrease of liquids sand-carrying capacity in case of mineral salts concentrations increase, especially at temperatures increase, was revealed.
The obtained results highlight the necessity of carrying out a detailed analysis of the water component composition when preparing hydraulic fracturing liquids and may serve as a basis for optimizing technological parameters during hydraulic fracturing operations in conditions of variable mineralization of formation and process waters.
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