«Environmental protection in oil and gas complex»

Assessment of technogenic seismic stresses in the zone of oil production on the continental shelf

UDC: 539.422.3
DOI: 10.33285/2411-7013-2022-4(307)-26-31

Authors:

¹ Kuban State University, Krasnodar, Russia
² Southern Scientific Centre of Russian Academy of Science, Rostov-on-Don, Russia

Keywords: oil and gas complex, seismogenic structure, technogenic stresses, block element method, contact stresses, modeling

Annotation:

It is known that the production activity of extractive enterprises, including the oil and gas industry, can be considered as one of the sources of the increase in the seismic intensity of the territory. Gradually growing technogenic stresses are generated in the earth's crust, eventually leading to a discharge in the form of a technogenic earthquake. This process is most active on the shelf, in the zones of contact between oceanic and continental lithospheric plates, where natural seismicity, produced by slow horizontal mutual movements of plates and subduction processes, is supplemented by induced technogenic seismicity. The purpose of the article is to model and analyze the tension of geological structures, including areas of contact between the continental and oceanic crust, making slow horizontal movement. The external impact is taken into account: the technogenic impact of the production process of the offshore oil and gas production platform and the pressure of the ocean water column. The differential factorization method is used to study the problems posed. The article assesses the emerging contact stresses and draws conclusions about their dependence on the distance between the plates, the thickness of the water layer and the frequency of the external load, which simulates the intensity of the production process. The results obtained can be useful for oil and gas companies to develop production process scenarios in a risk-free mode.

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