Geological model of the reef complex in the upper Devonian carbonate sediments

Geological and geophysical criteria for the allocation of a reef complex in the carbonate sediments of the Upper Devonian sectionare determined based on core analysis, log data and 3D seismic data on one of the fields of the Bashkirian arch. Uneven-aged reef masses are revealed. A geological model of the Frasnian-Famennian deposits of the Upper Devonian sediments with specificated zones of allocation and fluid content of reef reservoirs is proposed.
Materials and methods
Core, log data and 3D seismic data.
Results
The result of a comprehensive study of carbonate section at joint interpretation of log data and 3D seismic work was the establishment of a geological model of carbonate-reef complex of Upper Devonian.
Сonclusions
Obtained position of reef bodies in the context of borders and spread their area. The resulting model of the reef complex has eliminated the contradiction between the test data and delineate the oil deposits.