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  3. Possible Connection Between Recent Seismicity and Fluid Injection in the Offshore Oil and Gas Field Area of Sakhalin Island, Russia

Possible Connection Between Recent Seismicity and Fluid Injection in the Offshore Oil and Gas Field Area of Sakhalin Island, Russia

  • Автор: Konovalov A.V., Stepnov A.A., Turuntaev S.B.
  • Издательство: PURE AND APPLIED GEOPHYSICS

  Subsurface injection of fluids inside tectonically active areas is in some cases followed by a seismic response. This paper examines an example of seismic activation on the northeast coast of Sakhalin Island (in the area of the North American tectonic plate) in 2013–2014, which coincides with the start of the pilot operation of injection wells designated for the disposal of drilling fluids and co-produced and domestic wastewater from nearby oil and gas operations. Hypothesizing that the recorded seismicity is entirely induced by the fluid disposal, and considering injection rates of 105 m3/year, we estimate a seismogenic index of Σ = −3.98 ± 0.06. Assuming a total injection volume of VC = 107 m3 until 2041, the probability of occurrence of at least one earthquake with a magnitude M 5.5 was calculated to be PE = 0.99. The obtained results are of practical interest for developing seismic risk management strategies and using numerical tools to quantify seismic hazards.

Konovalov, A.V., Stepnov, A.A. & Turuntaev, S.B. Possible Connection Between Recent Seismicity and Fluid Injection in the Offshore Oil and Gas Field Area of Sakhalin Island, Russia. Pure Appl. Geophys. 179, 4233–4243 (2022).

https://doi.org/10.1007/s00024-022-03006-y