ANALYSIS OF VISCOSITY CORRELATIONS APPLICABILITY FOR OILS OF THE REPUBLIC OF BASHKORTOSTAN

Abstract

Decisions quality of infrastructure development also depends on the reliability of multiphase flow modeling results in oil and gas production systems. Different specialized bundled software and Informational System RN-KIN are used for the modeling of multiphase systems to solve the assigned tasks for Republic Bashkortostan’s oil fields. The modeling practice assumes the handling of large amount of initial data: geometrical properties of pipe systems, terrain elevation, technological modes of pumping, conditions of heat exchange with the environment, transport properties of oil fluid. Information about network construction and terrain elevation can be obtained from the projects and the acts of implementation of these projects, the conditions of pumping are available from operation-dispatch information, but verification of viscosity properties of oil fluids causes difficulties and requires additional laboratory tests. At the same time on oil fields of Republic Bashkortostan a lot of experimental physicochemical properties data of oils belonging to different oil reservoirs has been accumulated, which requires systematization and generalization of available experimental data. The article describes the difficulties in modeling of viscosity of oil fluids taking into account the characteristics of physicochemical properties of oils of Republic Bashkortostan’s oil fields. The necessity of systematization of existing retrospective laboratory tests and selection of viscosity correlations is indicated. The authors of the article for the first time analyzed and selected correlations of viscosity of oil and water-oil emulsions for Republic Bashkortostan’s oil fields, which will allow to increase accuracy and efficiency of hydraulic calculations on which basis the decisions about development of infrastructure of fields are made.