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INDUCED SEISMICITY MONITORING IN THE OILFIELD PRODUCTION AREAS, NORTH-EASTERN OFFSHORE ZONE OF SAKHALIN ISLAND
Abstract
Induced and natural seismicity discrimination in seismically active regions remains one of the complicated problems. An example of unusual seismicity pattern, which is currently recognized by seismologists as triggered seismicity due to oil and gas field production is considered in this work. We ha ve analyzed the seismicity behavior in seismogenic zone without any human-made activity as well as in hydrocarbon production area. We conclude that examined areas are characterized by the same dynamic regime. It follows that seismicity in Northern Sakhalin including offshore oilfield production areas should be recognized as natural background seismicity. It seems that maximum magnitude, inte rmediate seismicity rate and b-value changes are not sufficient for identifying the triggered seismicity.
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