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.2021.4.12 pmi-14685 https://pmi.spmi.ru/pmi/article/view/14685 Нефтегазовое дело Oil and gas Development of an algorithm for determining the technological parameters of acid composition injection during treatment of the near-bottomhole zone, taking into account economic efficiency Разработка алгоритма определения технологических параметров нагнетания кислотного состава при обработке призабойной зоны пласта с учетом экономической эффективности Krivoshchekov Sergey N. Кривощеков С. Н. Krivoshchekov Sergey N. krivoshchekov@gmail.com 0000-0002-9748-6291 Пермский национальный исследовательский политехнический университет (Пермь, Россия) Perm National Research Polytechnic University (Perm, Russia) Kochnev Aleksander A. Кочнев А. А. Kochnev Aleksander A. sashakoch93@gmail.com 0000-0003-2338-2796 Пермский национальный исследовательский политехнический университет (Пермь, Россия) Perm National Research Polytechnic University (Perm, Russia) Ravelev Kirill A. Равелев К. А. Ravelev Kirill A. Kirill.Ravelev@pstu.ru 0000-0002-7402-2830 Пермский национальный исследовательский политехнический университет (Пермь, Россия) (Perm, Russia) 21 10 2021 2021 250 587 595 09 02 2021 27 07 2021 21 10 2021 © 2021 С. Н. Кривощеков, А. А. Кочнев, К. А. Равелев © 2021 Sergey N. Krivoshchekov, Aleksander A. Kochnev, Kirill A. Ravelev 2021 С. Н. Кривощеков, А. А. Кочнев, К. А. Равелев Sergey N. Krivoshchekov, Aleksander A. Kochnev, Kirill A. Ravelev 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/14685

Актуальность научного исследования обусловлена низкой долей успешных соляно-кислотных обработок призабойных зон карбонатных коллекторов на территории Пермского края вследствие недостаточно внимательного проектирования и проведения мероприятий по интенсификации добычи нефти. В рамках данной статьи представлена разработка программы, в основу которой заложен алгоритм, позволяющий определить соответствующие максимальной экономической результативности объем и темп закачки кислотного состава в продуктивный пласт при проведении соляно-кислотной обработки. Суть предложенного алгоритма заключается в нахождении наибольшей прибыли от мероприятия по повышению нефтеотдачи пласта в зависимости от затрат на его реализацию и доходов от дополнительно добытой нефти. Работа алгоритма осуществляется по принципу перебора значений объема и темпа закачки кислотной композиции и их сохранения при достижении максимальной разницы между доходами и затратами, соответствующими данным технологическим параметрам нагнетания. В основу методики положены исследования Дюпюи по фильтрации жидкостей в пласте и результаты экспериментов Даккорда и Ленорманда по изучению изменения дополнительного фильтрационного сопротивления в околоскважинной зоне пласта при ее обработке кислотным составом. При анализе и включении в алгоритм данных исследований отмечается, что разработанная методика учитывает большое количество факторов, включая литолого-минералогический состав горных пород, технологические параметры нагнетания рабочего агента и его свойства, конструкцию скважины, фильтрационные свойства пласта, свойства скважинной продукции. В статье приведен алгоритм, который может быть реализован без затруднений при использовании любого языка программирования, например, Pascal. Также в данной работе представлен подбор оптимальных значений объема и темпа закачки на примере добывающей скважины Чайкинского нефтяного месторождения, располагающегося в пределах Пермского края. Внедрение разработанного алгоритма в практику нефтяного инжиниринга позволит без значительных затрат времени и дополнительных средств более грамотно и качественно подходить к проектированию соляно-кислотных обработок на карбонатных коллекторах.

Relevance of the research is due to the low proportion of successful hydrochloric acid treatments of near-bottomhole zones of carbonate reservoirs in the Perm region caused by insufficiently careful design and implementation of measures to stimulate oil production. Within the framework of this article, the development of a program is presented, which is based on an algorithm that allows determining the volume and rate of injection for an acid composition into a productive formation corresponding to the maximum economic efficiency during hydrochloric acid treatment. Essence of the proposed algorithm is to find the greatest profit from measures to increase oil recovery, depending on the cost of its implementation and income from additionally produced oil. Operation of the algorithm is carried out on the principle of enumerating the values ​​of the volume and rate of injection for the acid composition and their fixation when the maximum difference between income and costs, corresponding to the given technological parameters of injection, is reached. The methodology is based on Dupuis's investigations on the filtration of fluids in the formation and the results of the experiments by Duckord and Lenormand on the study of changes in the additional filtration resistance in the near-well zone of the formation when it is treated with an acid composition. When analyzing and including these investigations into the algorithm, it is noted that the developed technique takes into account a large number of factors, including the lithological and mineralogical composition of rocks, technological parameters of the injection of a working agent and its properties, well design, filtration properties of the formation, properties of well products. The article provides an algorithm that can be implemented without difficulty using any programming language, for example, Pascal. Selection of the optimal values ​​for the volume and rate of injection is presented in this paper, using the example of a production well at the Chaikinskoye oil field, located within the Perm region. Introduction of the developed algorithm into the practice of petroleum engineering will allow competent and effective approach to the design of hydrochloric acid treatments in carbonate reservoirs without a significant investment of time and additional funds.

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