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

Geological prerequisites for the use of seismoacoustic methods for enhanced oil recovery in the wells of the Solikamsk depression

UDC: 551.243(470.53)
DOI: 10.33285/2413-5011-2023-6(378)-34-42

Authors:

¹ nstitute of Geophysics Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
² Institute of Geology and Geochemistry Ural Branch of the Russian Academy of Sciences
³ LUKOIL-PERM LLC, Perm, Russia

Keywords: seismic-acoustic methods, enhanced oil recovery, Solikamsk depression, hydrocarbon deposits, "flower" type faults, vertical migration, Verkhnekamskoye salt deposit, "logging–impact–logging" method in the cycle with acoustic impact, fiber optic cable

Annotation:

Based on the results of the updated interpretation of temporary seismic sections of the profiles, analysis of geological, geophysical and field data, the main geological prerequisites for the use of seismic-acoustic methods for enhanced oil recovery in the wells of the Solikamsk depression are outlined. It has been established that the hydrocarbon deposits of its southern part are uplifts, limited and divided into blocks by "flowering" type disturbances, the modeling of which was performed according to well drilling data. The deposits are the result of vertical fluid migration along faults. Violations are traced from the foundation. Some of them diffuse salt and post-salt rocks. It is confirmed by the data, obtained during the study of the Verkhnekamsk salt deposit, which is most likely the main seal for the deposits of the Solikamsk depression. Reservoirs of deposits have a complex structure, fractures and secondary processes are developed in the rocks. Hydrocarbon reserves are located in low permeable porous rocks cut by cracks into blocks. Faults can be associated with complications in the process of drilling and operation of the field (fluid inflows into wellbores, karst phenomena, water flooding). On the example of the application of the acoustic impact "logging–impact–logging" method in a cycle with acoustic impact and measurement of seismic-acoustic emission in the wells of the Solikamsk depression, the possibility of identifying hydrocarbons migration routes and influence on their productivity is shown.

For the area under study, recommendations are given for the further use of the method at a more modern level using fiber optic cables.

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