Development of a new algorithm for control over the exploration of the Neft dashlari field based on geophysical data

Paleotectonic, paleogeographic, paleohydrogeological, and other characteristics of Azerbaijan’s oil and gas fields have been studied from a modern scientific and practical point of view. The geological-geophysical models of the majority of the rich hydrocarbon deposits of Azerbaijan’s OGR (Oil and Gas Region) have not been fully developed. These studies were carried out using geological planning, seismic profiling, and geophysical well survey (GWS) data. A new hydrocarbon-rich target was identified based on integrated geological–geophysical research carried out in selected areas of the OGR. Currently, the development of the deposits is studied using various methods to investigate processes occurring in the geological cross-section. Research based on local data has provided opportunities to increase oil and gas production. Currently, mathematical tools and computer technologies allow solving a wide range of problems in petroleum geology. Their integrated application is now widespread in Azerbaijan. Research shows that a new approach to the integrated interpretation of these technologies and collected geological-geophysical data can increase the efficiency of the search for new oil and gas traps, the exploration and development of known oil fields in Azerbaijan. This article studies the current state of development of the Girmakialti Formation (GALD) of the Neft Dashlari field, which has been under production for a long time. The initial oil reserves were calculated, and the field research method was improved and applied in these calculations. The porosity and current oil saturation of the areas where the residual oil reserves are concentrated have been compiled separately for the Girmakialti-1 (GALD-1), Girmakialti-2 (GALD-2), and Girmakialti-3 (GALD-3) horizons. Three porosity classes were defined: ≤0.20, 0.20–0.25, and >0.25. Similarly, three classes were defined for current oil saturation: ≤0.60, 0.60–0.70, and >0.70. The current oil and gas saturations determined by field surveys were compared with the initial saturations. Comparison identified areas where oil migration occurred. As a result of the research, areas for drilling new wells were specified.