Assessment of tectonic factor influence on the formation of zones of increased productivity of oil deposits in carbonate rocks of the Neftekumsk suite (on the example of the VostochnoBezvodnenskoye field)

Abstract

Relevance. To increase the level of hydrocarbon production in the overall balance of the fuel and energy complex of Russia, an important factor is a reasonable assessment and forecast of the oil and gas potential. This refers not only to new promising areas, but also to the involvement in the industrial development of unprocessed residual reserves and missed undiscovered areas of developed fields in old oil and gas producing areas, including in the Eastern Caucasus. The object of the study is oil deposits in carbonate fractured rocks of the Neftekumsk suite of the Lower Triassic of the Vostochno-Bezvodnenskoye field, which is at the final stage of development. These deposits are characterized by geological and technological heterogeneity (the degree of development of objects and sites). The proposed research will be a necessary step to develop the scientific and methodological basis for the allocation of additional facilities for the further development of hydrocarbons on the example of the Eastern Caucasus and the adaptation of the obtained results to their geological analogues within other oil and gas provinces. The aim of the study is to assess the influence of the tectonic factor on the formation of zones of increased productivity of oil deposits in the carbonate rocks of the Neftekumsk suite on the example of the Vostochno-Bezvodnenskoye field. Methods. The following methods were used in the course of the study: collection, analysis, systematization and processing of geological and geophysical data. Specialized methods were also used, such as the aerospace geological method and complex analysis of lineaments and geological-field data. Results. A high degree of dependence of accumulated oil production on indicators of the influence of the tectonic factor has been revealed. It has been established that the dominant factor in the formation of increased fracturing of oil reservoirs in the studied field is tectonic. The obtained results will allow us to develop new indicators of the influence of the tectonic factor on the productivity of wells, to introduce them into digital geological models in conditions of a shortage of data on fracture parameters.