Morphological features of sand bodies of the achimov deposits of the Tarasovskoye field. Part 1

Khlebnikov D.S. khlebnikovds1@bnipi.rosneft.ru “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Dushin А.S. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Martyanova K.V. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Khlebnikov M.S. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Odintsova M.Yu. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Gabdullina E.G. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
Zhernovkova T.V. “RN-BashNIPIneft” LLC (“Rosneft” PJSC Group Company) Ufa
DOI: 10.24412/2076-6785-2023-5-34-38

Abstract
The use of the results of dynamic analysis and the application of the classification of underwater fans made it possible to identify the internal morphology of alluvial fans within one layer of the field. Alluvial fan data differ in the type of feed system, their porosity properties and different effective thicknesses. In the article, using the example of the Ach1 reservoir, the morphological features of sand bodies of alluvial fans within the same reservoir and their identification by seismic attributes during dynamic interpretation are shown.

Materials and methods
Cube slices were calculated by the “envelope length” attribute, spectral decomposition maps (RGB), obtained by mixing different frequencies. On all maps of seismic attributes (maps of seismic classes, slices by attributes, RGB maps), morphological objects are traced, identified as deep-water (achimov) alluvial fans and feeding channels. A spectral decomposition map of the Ach1 reservoir was built, which contains the most promising areas that are associated with underwater fans. The morphology of the formation of underwater fans associated with the conditions of sedimentation and types of source of power supply.

Keywords
typification of extension cones, achimov formation, attribute analysis, sand reservoir rocks
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