Abstract

Relevance: In connection with the study of the oil and gas potential of the deep-lying strata of the sedimentary cover of the South Caspian Basin (SCB) in Azerbaijan, a significant amount of geological exploration and geophysical work was carried out. Scientific criteria have been prepared that can serve as a basis for future geological studies. It was noted that the main deposits of oil and gas in the region are associated with the South Caspian and Kura depressions, which were subjected to intensive subsidence during the Meso-Cenozoic time. Despite the high prospects of the central part of the South Caucasus, its deep layers, the problems associated with the extraction of oil and gas from them have not yet been finally resolved.
Object: Local uplifts of individual structural elements of the SWC developed mainly with the activity of the same folding mechanisms, and the vast majority of them are injection structures. These include local uplifts of the entire axial anticlinal zone of the Absheron-Pribalkhan structural megasaddle, to which the Neft Dashlary uplift is confined. This anticline zone originates in the northwest from the Goshadash uplift and further through the structures of Pirallahi - Gyurgyan-deniz - Darwin kupesi - Khali - Neft Dashlari - Azeri, etc., extends to the east to the Cheleken-Sea uplift. Developing in the conditions of the Absheron-Pribalkhan non-classical (residual) subduction. A characteristic feature of the structures of this anticlinal zone is their formation by the mechanisms of longitudinal and transverse bends, with the former dominating.
Methods: As a result, most of them are linear and elongated brachyfolds complicated by mud volcanism. In the area of the Absheron archipelago, petrophysical studies were carried out in a number of areas. Their goal was to obtain detailed information about reservoir rocks, their lithological and petrophysical features, clarify hydrocarbon resources and, based on the results obtained, determine further directions for prospecting and exploration. For this purpose, the geological, geophysical and physical characteristics of the rocks were studied, which influenced the reservoir potential of the Meso-Cenozoic deposits containing oil, gas and gas condensate accumulations in the South Caucasus. Such work was also carried out at the Neft Dashlari field of the North Absheron archipelago.
Result: without sufficient knowledge of the reservoir characteristics of the stratum, it is impossible to estimate hydrocarbon deposits and production volumes, as well as to change the direction of the survey. In addition to the geoscience studies carried out in this area, lithologic-petrographic and reservoir characteristics have been investigated to determine the conformity changes along the area, carbon content, porosity, permeability, density, grain size and sound wave velocity of the above stratum. A table was compi Also in the table were given the minimum, maximum and average limits of the physical properties of rocks. The dependence of reservoir properties on the depth of occurrence and their dependence on other physical factors are considered.

Keywords: Petrophysics; Density; Propagation of ultrasonic waves; Porosity; Well; Rocks; Depth; Oil; Gas; Deposit; Criteria; Carbonate content; Deflection; Drilling; Geophysics; Oil and gas accumulations; Led reflecting the reservoir characteristics of the field