Mapping the Reef Buildings of Devonian in Western Orenburg Region Based on the Comprehensive Analysis of Seismic and Wells

Abstract

The mapping organogenic reef structures of Devonian on Western Orenburg Region is a rather difficult and ambiguous task in view of the fact that carbonate reservoirs are inhomogeneous media containing voids of different types (cracks, pores, caverns) and are often subject to secondary rock substitution. During the study, a complex of methods is used to map the buildings, based on the analysis of seismic materials, dynamic interpretation and borehole data. In the process of work, an algorithm for synchronous deterministic inversion was performed on seismic data before summation and spectral decomposition of the amplitude cube. As a result, with the help of this set of methods, the main reef buildings of the Famennian stage of Devonian time were identified.