Assessing the resource potential of oil and gas-bearing formations — including exploration, reserve estimation, and field development — has become increasingly dependent on sophisticated natural reservoir modelling techniques. The authors discuss the issues of lithofacies zoning within the Upper Devonian-Tournaisian carbonate sequence of the Shalymsky trough (Permsky-Bashkirsky Petroleum Area of Volga-Urals Petroleum Province). The distribution patterns (features) of both conventional and unconventional hydrocarbon traps within these formations are determined. Based on the synthesis of well logging data, a forecast of elastic properties at various levels of detail is obtained, and their relationships with the lithofacies setting are demonstrated. In addition, the asymmetry of its structure in the slope areas of the Kamsky and Bashkisky arches is substantiated. For the regional stage of geological exploration, a methodology for revealing various facies objects in seismic images using three-dimensional full-wave computer modelling of seismic wave propagation is presented. The features of building a seismoacoustic model in the regional stage are considered, taking into account the specific structural character of depositional formations, as well as the limited well data and the range of well log suites. The seismoacoustic model of the Shalymsky trough contains regional seismic sequences and local thin-layered lithofacies objects. Three-dimensional full-wave computer modeling of seismograms was performed, and the results of their processing allowed to obtain time and depth sections. Wave pattern analysis allowed revealing seismic patterns for sedimentary formations of various genesis, providing a basis for improving the geological informativeness of CMP reflection seismic surveys in the regional stage. This includes ensuring the accuracy of interpreting the kinematic and dynamic characteristics of actual seismic data, as well as optimizing field observation techniques and seismic data processing methods.

Natalya K. Fortunatova ORCiD  Scopus
Doctor of Geological and Mineralogical Sciences,
Deputy Director General
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: fortunatova@vnigni.ru

​Samuil A. Kaplan ORCiD
Candidate of Technical Sciences,
Head of Department
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: s_kaplan@vnigni.ru
AuthorID: 529794

Valentina P. Klokova
Senior Researcher
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: vklokova@vnigni.ru
AuthorID: 545233

Marina А. Bushueva
Head of Sector
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: bushueva@vnigni.ru

Kanev A. Sergeevich
Candidate of Geological and Mineralogical Sciences,
Head of Department
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: kanev@vnigni.ru

Tat’yana V. Levchenko
Candidate of Physical and Mathematical Sciences,
Leading researcher
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: tlevchenko@vnigni.ru
AuthorID: 126690

Vladimir E. Rok
Doctor of Physical and Mathematical Sciences,
Head of sector
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: vladimir.rok@vnigni.ru
AuthorID: 59363

Aleksandr V. Seregin
Senior Researcher
All-Russian Research
Geological Oil Institute,
36, Shosse Entuziastov, Moscow, 105118, Russia
e-mail: aseregin@vnigni.ru
AuthorID: 1232412

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