Modeling experience of low-permeability reservoirs the case of license block of the Priobskoe field

Petruk A.C. RN-BashNIPIneft LLC Ufa
Rodionova I.I. rodionovaii@bnipi.rosneft.ru RN-BashNIPIneft LLC Ufa
Mukhametov A.R. RN-BashNIPIneft LLC Ufa
Galeev E.R. RN-BashNIPIneft LLC Ufa
Iskevich I.G. RN-BashNIPIneft LLC Ufa
Fazylov D.S. RN-BashNIPIneft LLC Ufa
Mummer P.S. RN-Yuganskneftegaz LLC Nefteyugansk
DOI: 10.24412/2076-6785-2022-3-18-20

Abstract
The article presents an approach to modeling low-permeability, low-dissected zones of deep-water fan facies on the example of one of the licensed areas of the Priobskoye field, based on a significant reduction in correlation radii. Drilling of many horizontal wells (HWs) in the area under consideration made it possible to measure the average size of sand bodies. For a more reliable result, horizontal wells (HWs) were taken at an enormous distance from each other and from different parts of the field. The trajectory of the horizontal part of the wells penetrates parallel to the structural surfaces. In the studys course, it is deemed that the average size of the bodies is 220 m. At the stage of hydrodynamic modeling,
a better convergence of well productivity dynamics was obtained than with the standard approach to building a model.

Materials and methods
Based on the results gamma ray from many densely spaced horizontal wells, work has been done to measure the average size of sand body lengths. Based on the goat values, the probability field was by investigated in variogram analysis at a shorter distance. Taking into account the new correlation radii and the nature of the distribution of reservoir properties in the distal part of the turbidite complex, a model is constructed that is close to real geology. Calculations of the hydrodynamic model were performed, the best convergence of well
productivity dynamics was obtained.

Keywords
horizontal wells, variogram analysis, convergence, well productivity, low-permeability reservoir, hard-to-recover reserves, geological modeling, hydrodynamic modeling
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