Geology, geography and global energy

Scientific and Technical Journal

Complex lithological and petrographic characteristics of residual hydrocarbon stocks in different collector zones

2013. №1, pp. 23-32

Shulyakova Marina S. - Under-graduade student, Kuban State University, 149 Stavropolskaya st., Krasnodar, Russian Federation, 350049, marusiya74@mail.ru

Tyukavkina Olga V. - C.Sc. in Geology and Mineralogy, Associate Professor, Surgut Oil and Gas Institute, 38 Entuziasty st., Tyumen reg., Surgut, Russian Federation, 628400, tov.sing@mail.ru

The article states that the productive geological and geophysical conditions correctly need to be interpreted correctly as a pre-condition to searching for residual hydrocarbon (oil and gas) deposits. At this stage, it observed that the research work selected the complex, Jurassic-formed deposit layers located in the central section of the Surgut mega-arch. All of the hydrocarbon deposits, the document notes, are characterized by multi-layer complexity and a considerable degree of heterogeneity. The document subsequently revealed that the Geographic Information System (GIS) has identified data zones of increased clay grouting at collector sites, possibly containing vast concentrations of residual hydrocarbon reserves. GIS also has identified complex deposits in the central portion of the Surgut arch. Plans for acquisition of these reserves were undertaken, the study said, through an Isoline (geographical contour presentation) project. Consequently, the research detected the presence of ’sandy and silty’ clay-type rocks (corresponding to 6–9 allocated lithological types). The research project, however, could neither detect potential resistance nor spontaneous polarization. This means that it would be necessary to undertake lithological and petrographic activities via electro-logging data prior to initiating any searches for oil and gas deposits. The blueprint concludes, inter alia, that it is necessary in the search for hydrocarbon deposits to use computer programs and algorithms for detecting the ’ruggedness’ factor; to rely on spontaneous polarization when terra-genetic conditions indicate the raised capacity of layers (>2 м) and mineralization; and to attempt via relative value ?пс to eliminate the influence of all factors, including detrital particles, during clay grouting.

Key words: complex layer formations,lithological and petro-graphical peculiarities,zones of residual reserves,spontaneous polarization,zones with difficulty recovering

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