Evaluation of the Influence of Geological and Technological Factors on the Recovery Factor of Low-Viscosity Oils from Carbonate Reservoirs

Abstract

The geological structure of low-viscosity oil reservoirs, represented by carbonate collectors in the Ferghana region of Uzbekistan, is characterized by a wide range of variations in geological and physical factors as well as in the parameters of implemented development systems. Based on the refinement of parameters characterizing reservoir structure, geological heterogeneity, and the reservoir properties of productive layers, as well as the results of developing fields in the late stage of exploitation, a geological-statistical model has been developed using the method of multifactorial correlation and regression analysis. This model allows for the qualitative and quantitative assessment of the influence of geological and technological factors on the oil recovery factor for carbonate reservoirs in the Ferghana region. The study demonstrates the dominant influence of geological factors on the oil recovery factor, while among technological factors, only the well spacing density shows significant impact. The developed geological-statistical model for the oil recovery factor is recommended for use in justifying geological and technical measures to optimize the development systems of these fields.