Reassessment of the potential of oil reserves in thin-layered “hazel grouse” type reservoirs

Abstract

The article describes an integrated approach to the development of solutions for the effective involvement of oil in the development of a thin-layered “hazel grouse” type reservoir. The principles of justification based on facies, geological-hydrodynamic and geomechanical modeling are analyzed. In the course of the work, new core data and a petrophysical model were obtained, which made it possible to substantiate the TRIZ status of the object. A conceptual geological model was built and an assessment of geological reserves was carried out to determine the priority zones for putting wells into operation.

Increasing the profitability of production of hard-to-recover oil reserves based on the choice of a rational development system

“…Previously, the geological features of the reservoir structure were established: thin-layered interbedding of sandstone, uneven-grained siltstone and clay interlayers; low permeability; high clay content, dissection and anisotropy of reservoir properties [10]. The transition from a petrophysical model based on the selfpolarization potential method, which did not allow to identify the productive intervals of the reservoir under study in full, to a model based on radioactive logging methods, made it possible to increase the initial geological reserves of the object by more than 50% and justify the exemption for the extraction of hard-to-recover oil reserves [11][12], which led to an increase in the economic assessment of the development of the reservoir under consideration. Based on the study of the elastic-deformation properties of the core and the geomechanical model built on their results, the optimal design of hydraulic fracturing was determined, which makes it possible to exclude the involvement of the underlying water-saturated interval [13].…”