REFINEMENT OF THE GEOLOGICAL AND HYDRODYNAMIC MODEL OF A COMPLEX OIL RESERVOIR BY MEANS OF A COMPREHENSIVE DATA ANALYSIS

Abstract

The relevance of research is caused by the widespread use of geological and hydrodynamic modeling for design of the development of oil and gas fields. Using the standard approach to creating a geological and hydrodynamic model, it is likely that the complexity of the structure and heterogeneity of the reservoir properties are underestimated, which can negatively affect the forecasted technological and economic indicators of field development. The main aim of the research is to develop a methodological approach for the comprehensive analysis and accounting of the available multiscale field and laboratory information when creating a cube of absolute permeability of a priority field. Object: complex carbonate oil reservoir of the Vostochno-Lambeyshorskoe field. Methods: assessment of well coverage; statistical processing of research data of standard and full-sized core samples; reinterpretation and integration of field-geophysical and hydrodynamic studies of wells; creation and use of macros in the Visual Basic environment to automate iterative data analysis processes; stochastic interpolation of the received data taking into account seismic information in the geological simulator IRAP RMS (ROXAR); creation and use of a filtration model in the Tempest More hydrodynamic simulator (ROXAR). Results. The paper gives the characteristic of the layers of the oil reservoir under consideration, the features of the geological structure. The authors have developed the methodological approach to construction and refinement of the absolute permeability cube in the geological and hydrodynamic model, which reduces the degree of uncertainty of the properties of the reservoir. A comparative characteristic of two filtration models created on the basis of a standard method of accounting for absolute permeability and according to the proposed methodology was carried out. A higher degree of convergence of the calculated and actual technological indicators of development is noted, when using the developed methodological approach to clarify the absolute permeability of the reservoir. In order to assess the predictive ability of the geological and hydrodynamic model of the formation, the method of retrospective forecasting of technological parameters of the development of the formation is used, satisfactory convergence is noted.

Keywords

• geological and hydrodynamic modeling
• comprehensive research results
• absolute and phase permeability
• complex carbonate reservoir
• complex absolute permeability logging curve
• well test
• core
• flowmetric studies