«Geology, geophysics and development of oil and gas fields»

Construction of oil reservoirs’ 3D geological models based on the method of probabilistic multiple realizations

UDC: 553.98(470.13)+550.8.072
DOI: 10.33285/2413-5011-2023-7(379)-12-18

Authors:

¹ Perm National Research Polytechnic University, Perm, Russia

Keywords: geological modeling, geological oil reserves, probabilistic modeling, experiment planning, seismic exploration

Annotation:

The optimization method in case of the multivariant 3D modeling of a deposit’s geological structure variants was implemented on the example of the operational object of the Permian-Carboniferous deposit of the Usinskoye field. The geological model possible implementations were generated by enumerating different variants of interpolation methods setting, based on the theory of planning experiments, which allowed representative description of the geological structure possible variants in conditions of the existing uncertainty. At the stage of generation of 3D model lithological cubes, the criteria characterizing the compliance of the geological model with the results of actual drilling, 3D seismic surveys and dynamics of wells operation in the process of a field development were calculated. The complex probability criterion, which characterizes the correspondence of each generated 3D model to the actual drilling results and well production dynamics, was calculated in order to integrate the indicators. On the basis of this methodology, the reliability ranking of 3D models was carried out for the selected operational object, which allowed determining the range of the most probable oil reserves.

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