CONSTRUCTION OF A DIGITAL GEOLOGICAL MODEL OF THE PRODUCTIVE HORIZONS OF LOWER TO MIDDLE JURASSIC TERRIGENOUS DEPOSITS OF THE DIVALKAK FIELD (REPUBLIC OF UZBEKISTAN)
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Abstract
The Divalkak field discussed in the article is located in the Ispanly-Chandyr uplift. The productive section is represented by Jurassic carbonate and Lower to Middle Jurassic terrigenous deposits. Geological modeling of terrigenous deposits has its own specific features due to the nature of these sediments and their variability. These deposits are characterized by complex lithological heterogeneity and intricate geometry. Modeling requires consideration of these factors, as well as the use of specialized methods and approaches. This study presents a methodology for constructing a three-dimensional digital geological model of the productive horizons XV-NR and XVIII of the Divalkak gas condensate field. The stages of geological and geophysical data collection, processing, and interpretation are described, including structural modeling, lithological model construction, and modeling of reservoir properties (porosity and permeability). Based on various variogram scenarios, with facies distribution and porosity propagation across the studied area, a porosity cube was obtained. The resulting geological model most accurately reflects the internal structure of the reservoirs and provides deeper insight into the sedimentary characteristics of the formations and petrophysical relationships.
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