2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2022.38 pmi-15757 https://pmi.spmi.ru/pmi/article/view/15757 Study on the rheological properties of barite-free drilling mud with high density Исследование реологических свойств безбаритного бурового раствора повышенной плотности Leusheva Ekaterina L. Леушева Е. Л. Leusheva Ekaterina L. Leusheva_el@pers.spmi.ru 0000-0002-0510-7769 Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia) Alikhanov Nazim T. Алиханов Н. Т. Alikhanov Nazim T. Leusheva_el@pers.spmi.ru 0000-0002-7122-2917 Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia) Brovkina Nataliia N. Бровкина Н. Н. Brovkina Nataliia N. Leusheva_el@pers.spmi.ru 0000-0003-2239-0719 ООО «Газпромнефть-Снабжение» (Россия) OOO “Gazpromneft-Snabzhenie” (Russia) 29 12 2022 2022 258 976 985 01 03 2022 25 05 2022 29 12 2022 © 2022 Е. Л. Леушева, Н. Т. Алиханов, Н. Н. Бровкина © 2022 Ekaterina L. Leusheva, Nazim T. Alikhanov, Nataliia N. Brovkina 2022 Е. Л. Леушева, Н. Т. Алиханов, Н. Н. Бровкина Ekaterina L. Leusheva, Nazim T. Alikhanov, Nataliia N. Brovkina Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/15757

Повышение эффективности бурения и вскрытия продуктивных пластов напрямую связано с качеством применяемого бурового раствора. Правильный выбор типа раствора и его компонентов позволит сохранить продуктивность пластов, устойчивость стенок скважины и снизить вероятность других осложнений. Нефтегазовыми компаниями для условий повышенных давлений в качестве утяжеляющего компонента в составе буровых растворов применяется барит, реже сидеритовый или гематитовый утяжелитель. Но применение данных добавок для вскрытия продуктивного пласта приводит к снижению фильтрационных характеристик коллектора, так как их практически невозможно удалить из поровых каналов. Исходя из этого, предлагается безбаритный буровой раствор повышенной плотности на основе солей муравьиной кислоты (формиты) с добавкой карбонатного утяжелителя в качестве кислоторастворимого кольматанта. Приведены результаты экспериментальных исследований реологических параметров безбаритных растворов, проанализированы полученные данные. На основании сравнения результатов экспериментов рекомендуется применение безбаритного бурового раствора высокой плотности на основе солей муравьиной кислоты (формиата натрия и калия) и с добавкой частично гидролизованного полиакриламида с молекулярной массой 27 млн.

Improved drilling and reservoir penetration efficiency is directly related to the quality of the drilling mud used. The right choice of mud type and its components will preserve formation productivity, stability of the well walls and reduce the probability of other complications. Oil and gas operators use barite, less often siderite or hematite weighting agent as a weighting component in the composition of drilling muds for the conditions of increased pressure. But the use of these additives for the penetration of the productive formation leads to the reduction of filtration characteristics of the reservoir, as it is almost impossible to remove them from the pore channels. Therefore, barite-free drilling mud of increased density based on formic acid salts with the addition of carbonate weighting agent as an acid-soluble bridging agent is proposed. The results of experimental investigations on rheological parameters of barite-free solutions are given and the obtained data are analyzed. Based on the comparison of results it is recommended to use high-density drilling mud on the basis of formic acid salts (sodium and potassium formate) and with the addition of partially hydrolyzed polyacrylamide with molecular mass of 27 million.

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