THE GEOLOGICAL STRUCTURE AND THE ANALYSIS OF THE REGULARITY OF THE CHANGE IN THE RESERVOIR PROPERTIES OF THE NEFT DASHLARI DEPOSIT

Latif Sultanov, Nariman Narimanov, Afet Samadzadeh

Abstract


At the Neft Dashlari deposit, in order to study the lithologic-petrographic and reservoir properties of deep-seated formations, as well as the regularity of their changes with depth, carbonate content, porosity, permeability, density, grain size distribution and speeds of propagation of longitudinal seismic waves from samples taken from exploration and prospecting wells. The minimum, average and maximum limits of the physical properties of the rocks were established. The dependence of reservoir properties and other physical factors on the depth of occurrence of the latter is considered. Our analysis of the influence of physical parameters of rocks on their permeability allows us to conclude that the main influence on permeability is exerted by the lithofacial composition, degree of sorting, carbonate content and type of porosity. However, the increased carbonate content of rocks can stimulate the appearance of fracturing in them, as well as cavernous leaching voids in the case of circulation of water in the formed cracks. These processes have a positive effect on reservoir properties, mainly on the permeability of high-carbonate rocks. Analyzing the results of these researches, it is possible to predict the oil and gas potential of deep-lying layers along with those already exploited.


Keywords


deposits; suit; porosity; deep; well; density; petrophysics; horizon; drilling; geophysics

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DOI: http://dx.doi.org/10.21303/2461-4262.2019.00835

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ISSN 2461-4262 (Online), ISSN 2461-4254 (Print)