УДК 550.832+553.982.2+662.276.43
(UDK 550.832+553.982.2+662.276.43)
(INFLUENCE OF SEDIMENTARY MODELS OF DELTAIC SAND BODIES ON THE CHARACTER OF RESERVOIR WATERING BY THE EXAMPLE OF J-2C HORIZON OF THE KALAMKAS FIELD)
На примере продуктивных отложений горизонта Ю-2C средней юры на месторождении Каламкас в пределах Северо-Устюртской впадины (Республика Казахстан) с помощью детального описания песчаных тел, комплексной интерпретации данных исследований обводненных слоев, данных профилей притока и приемистости, а также с применением метода динамического анализа рассматривается влияние структуры и неоднородности песчаных тел дельты на охват заводнением. Выделено четыре типа песчаных тел в зависимости от степени обводнения или стадии формирования каналов низкого фильтрационного сопротивления. Обводнение, характеризующееся как внезапное, означает, что каналы уже сформировались. Сильное обводнение относится к промежуточному этапу формирования, умеренное обводнение – к ранней стадии формирования каналов низкого фильтрационного сопротивления. Слабое обводнение свидетельствует о том, что каналы пока не развиты. Рассмотрены типы обводнения и распределения остаточной нефти в зависимости от седиментационных моделей песчаных тел.
Исследование проведено в рамках реализации специального научно-технического проекта Китайской националь-ной нефтегазовой корпорации «Исследование и внедрение ключевых технологий для разработки зарубежных месторождений» (2019D-44).
Using the example of the productive deposits of the Middle Jurassic J-2C horizon in the Kalamkas field within the North Ustyurt Basin (Republic of Kazakhstan), the architecture characteristics and heterogeneity of the delta sand bodies are considered to determine their influence on water-flooding characteristics, through integrated study of fine characterization of sand bodies, comprehensive interpretation of water flooded layers, statistics of production and absorption profiles, and dynamic analysis. Four types of sand bodies have been identified, depending on the degree of water-flooding or maturity of the dominant channel of water flow. Sudden water-flooding means that the preferential channels have already formed; strong water-flooding refers to the middle stage of the formation of the preferential channels; medium water-flooding refers to the early stage of formation of the preferential channels; weak water-flooding indicates that the preferential channels are not developed. Furthermore, the water flooded types and remaining oil distribution under different types of overlay sand bodies are also discussed in this study.
The study was supported by the PetroChina Major Science and Technology Project “Research and application of key development technologies for overseas oil and gas fields” (Grant No. 2019D-44).
Ли Сюаньжань1, e-mail: lixuanran@petrochina.com.cn;
Ли И1, e-mail: lzy2009@petrochina.com.cn;
Ни Цзюнь1, e-mail: nijun1@petrochina.com.cn;
Хоу Цзюэ1, e-mail: houjue95@petrochina.com.cn;
Фу Либин1, e-mail: fulibing@petrochina.com.cn;
Чжао Лунь1, email: zhaolun@petrochina.com.cn
1 Научно-исследовательский институт разведки и разработки нефти, Китайская национальная нефтегазовая корпорация (Пекин, Китай).
Li Xuanran1, e-mail: lixuanran@petrochina.com.cn;
Li Yi1, e-mail: lzy2009@petrochina.com.cn;
Ni Jun1, e-mail: nijun1@petrochina.com.cn;
Hou Jue1, e-mail: houjue95@petrochina.com.cn;
Fu Libing1, e-mail: fulibing@petrochina.com.cn;
Zhao Lun1, e-mail: zhaolun@petrochina.com.cn
1 Research Institute of Petroleum Exploration & Developed, PetroChina (Beijing, China).
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