ИНТЕНСИВНОСТИ ПРОЦЕССОВ НАЛОЖЕННОГО ЭПИГЕНЕЗА КАК ИНДИКАТОРЫ НЕФТЕНАСЫЩЕННОСТИ ПЕСЧАНЫХ КОЛЛЕКТОРОВ

Результат исследований: Материалы для журналаСтатья

1 Цитирования (Scopus)

Аннотация

The relevance of the research is caused by the possibility to identify missed (low/resistivity) productive reservoirs in sandstone intervals, based on the available well/logging data with the focus on the intervals with no core data. The aim of the research is to apply the intensity of superimposed epigenetic processes in sandstones as an indicator of oil saturation in sandstone reservoirs in Western Siberia. Objects: Upper Middle Jurassic sandstone deposits in Tomsk region and Achimov sequence of early Cretaceous sandstone deposits in Sa/ motlor field. Methods. A proprietary innovative statistical technique to interpret well/logging data is used to identify the intensities of superimposed epigenesist of kaolinitization, carbonatization, pyritization, pelitization and missed low/resistivity hydrocarbon/bearing reservoirs. Results. It is proved that the intensity parameters of superimposed epigenesis of kaolinitization and pyritization for Jurassic and Creta/ ceous sand deposits in Western Siberia can be used as indicators of oil saturation in the reservoirs. The cutoff values for Tomsk region and Samotlor are identified. Paragenesis of superimposed epigenetic processes of pyritization and kaolinitization in sandstone intervals signifies hydrocarborn saturation of the intervals. Empirical evidence proves that the success rate of the applied indicators is ~75–80 % if the indicators are estimated by the innovative statistical technique for well logging data interpretation. Conclusion. The use of the innovative statistical technique for well logging data interpretation allows identifying missed oil/bearing low/ resistivity intervals based on the well/logging data obtained earlier. It also enables solving lithological, petrophysical, and geological tasks (conditioned by deep fluid migration) while oil and gas prospects.

Язык оригиналаРусский
Страницы (с-по)90-97
Число страниц8
ЖурналBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Том330
Номер выпуска6
DOI
СостояниеОпубликовано - 1 янв 2019

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Keywords

  • Hydrocarbons
  • Low resistivity reservoir
  • Secondary kaolinitization
  • Secondary pyritization
  • Specific electric resistivity
  • Superimposed epigenetic process
  • Well logging

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Economic Geology
  • Management, Monitoring, Policy and Law

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