Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.24887/0028-2448-2022-11-90-93
Ключевые слова: production drilling, carbonate reservoir, cavernosity, paleocuts, fault, conceptual model, эксплуатационное бурение, карбонатный коллектор, кавернозность, палеоврезы, разрывные нарушения, концептуальная модель
Аннотация: Yurubcheno-Tokhomskoe major oil-gas-condensate field in Eastern Siberia is unique and has no analogues in the world. The article considers qualities of its reservoir structure. Results of integrated exploratory and production drilling analysis are presented. Main success factors are identified based on seismic data analysis, well lПоказать полностьюogging, production logging, well testing, field development history and current geological concepts. A complex structure of Yurubcheno-Tolkiomskoe field is conditioned by a plenty of deposits with different oil-water and gas-oil contacts of two uneven geological complexes. The Riphean reservoir consists of carbonate non-permeable matrix with many capacity components presented as fractures and caverns. Also there are multiple discontinuities in reservoir section, intense variability of roof altitude connected with the presence of paleocuts. Vendian geological complex deposits are highly dissected and have small effective reservoir thickness. The main component of the reservoir capacity is cavernosity. According to that fact, an important goal is the most intensive leaching zones prediction. Cavernous intervals are confined to roof part of Riphean and paleocuts slopes. In addition, there is observed degradation of filtration and capacitive properties to the bottom of Riphean sediments. An important factor influencing the operation is the location of the horizontal wellbore relative to fractures and macrofractures, which provoke breakthroughs of the underlying water and gas of the vast gas cap. In the most cases, unsuccessful production wells are located in the north part of the deposit. There is small effective capacitance and lack of caverns in oil saturated part of the reservoir. Successful production wells are drilled to high-capacitance zones, mostly consisting of cavernous component and in 70% of cases they are located nearby paleocuts.
Журнал: Нефтяное хозяйство
Выпуск журнала: №11
Номера страниц: 90-93
ISSN журнала: 00282448
Место издания: Москва
Издатель: Нефтяная компания "Роснефть", ОАО "Зарубежнефть", Российский межотраслевой научно-технический комплекс "Нефтеотдача", Научно-техническое общество нефтяников и газовиков им. акад. И.М. Губкина, АНК "Башнефть", ПАО "Татнефть" им. В.Д. Шашина