Javadova A.

MicroPro GmbH, Germany 26B, Magdeburger str., Gommern, 39245: javadova@micropro.de

DOI: 10.35714/ggistrat20250200020

Summary. The Karabakh field, situated in the northern Absheron Archipelago within the South Caspian Basin, presents significant hydrocarbon potential, primarily in the Lower and Upper Kirmaki formations. Initially, the field was discovered in 1998 by the Caspian International Operating Company consortium. The project was suspended in 1999, when the oil price was 25–26 dollars per barrel. Despite the discovery of the fields, the project was closed due to the oil and gas reserves being deemed economically unfeasible for development. However, in 2018, its development began within the framework of a contract signed between SOCAR and Equinor.

Geological studies, including stratigraphy, well logging, and petrophysical interpretations, were conducted on data from three wells (KPS-1 to KPS-3) with notable production test success in KPS-2. Positive gas and condensate results were identified from both the Lower Kirmaki and Upper Kirmaki sandy intervals highlighting the commercial viability of the field.

The structural complexity of the region marked by asymmetric folds, thrust faults, and lithological variability–poses significant exploration and drilling challenges. Stratigraphic assessments reveal a thick sequence of sandy-argillaceous formations, with key reservoirs demonstrating high porosity (up to 22%) and sand content (up to 75%). Drilling operations have been impeded by unstable pore pressures, clay swelling, and overpressure zones, particularly in the Gala and Miocene Formations. The presence of montmorillonite-rich clays further complicates borehole stability.

Comparative regional analysis and historical data from the adjacent fields support the Karabakh potential but underscore the need for further appraisal. Recommendations include the targeted drilling, enhanced seismic analysis, updated petrophysical interpretation, and rigorous pressure management. Addressing these technical and geological uncertainties is essential to unlock the full economic potential of the Karabakh field and ensure safe, efficient offshore development.

Keywords: The South Caspian Basin, oil and gas exploration, petrophysical log analysis, lithology, stratigraphy, drilling

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