1887
Volume 36 Number 10
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Abstract

Permafrost in Russia occupies about 5 × 106 km2 (Brown et al., 1997), and many known mineral deposits and oil and gas fields fall within this zone. Seismic data from northern petroleum provinces, including West Siberia, may be of low quality because of permafrost effects. Permafrost is localized in a relatively thin near-surface layer of variable thickness and produces velocity anomalies, which have to be taken into account in interpretations. Neglect of the permafrost influence on the geometry of reflectors may cause significant errors in modelling and yield low-quality wave patterns over the entire time range (Figure 1).

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2018-10-01
2024-04-26
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