ПРОГРЕСС ИССЛЕДОВАНИЙ ПО ПОРОГОВОМУ ГРАДИЕНТУ ДАВЛЕНИЯ В КОЛЛЕКТОРАХ ТЯЖЕЛОЙ НЕФТИ

Высокомолекулярные смеси, такие как смолы и асфальтены в тяжелой нефти, определяют ее уникальные структурные свойства, проявляющиеся в характеристиках нелинейного просачивания. Пороговый градиент давления является критическим параметром при изучении недарсиевского течения. В данной статье представлен всесторонний обзор прогресса исследований погрешности градиента давления в коллекторах тяжелой нефти. В ней обобщены основные методы определения порогового градиента давления, включая лабораторные физические эксперименты, численное моделирование и интерпретацию результатов испытаний скважин, а также сравниваются преимущества и ограничения каждого подхода. Кроме того, в ней анализируются ключевые факторы влияния, такие как вязкость сырой нефти, проницаемость и водонасыщенность. Результаты показывают, что пороговый градиент давления, как правило, увеличивается с ростом вязкости сырой нефти, увеличивается с ростом водонасыщенности в низкопроницаемых кернах, но уменьшается с ростом проницаемости. В данном исследовании представлены систематические выводы относительно этих факторов влияния и методов измерения, направленные на минимизацию погрешностей измерений и предоставление теоретической основы для оптимизации процессов закачки и добычи в коллекторах тяжелой нефти.

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