The use of a predictive porosity cube when performing seismogeological analysis in order to increase the efficiency of horizontal wells drilling

UDK: 550.834

DOI: 10.24887/0028-2448-2026-7-82-87

Key words: seismic exploration, seismogeological analysis (SGA), geological support for drilling horizontal wells, patch reefs, geological modeling, genetic inversion

Authors: P.L. Kizimov (Branch of RN- GRD in Moscow – Technical Competence Center IGIRGI, RF, Moscow); L.S. Kuznetsova (Branch of RN- GRD in Moscow – Technical Competence Center IGIRGI, RF, Moscow); A.V. Pivovar (Branch of RN- GRD in Moscow – Technical Competence Center IGIRGI, RF, Moscow); N.N. Pleshko (Branch of RN- GRD in Moscow – Technical Competence Center IGIRGI, RF, Moscow)

Efficient drilling of complex carbonate reservoirs with a high degree of variability of properties is one of the key tasks of modern oil and gas geology. Successful drilling of horizontal wells directly depends on an accurate forecast of the distribution of zones with increased reservoir porosity and permeability properties. Geological models based on the interpolation of isolated borehole data often do not take into account the high vertical and lateral variability of a complex reservoir, which can lead to errors at the trajectory planning stage and significant economic risks: drilling suboptimal shafts with low effective penetration through the reservoir and reducing the efficiency of field development. The use of 3D seismic and derived attributes enables to qualitatively map the boundaries of seismic facies zones, while a model integrating seismic and borehole data is required for the quantitative prediction of parameters such as porosity. The use of the predictive porosity cube in the framework of performing seismogeological analysis (SGA) in the geological support of drilling horizontal wells is aimed at minimizing geological risks, increasing the opening length of an effective reservoir, and oil flow rates. Thus, the integrated use of SGA using a full range of geological and geophysical information in conditions of complex reservoirs becomes a necessary tool for improving the efficiency of drilling horizontal wells.

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