Application of AVO analysis to seismic records on the Laptev Sea Shelf
T. A. Kirilova-Pokrovskaya, A. B. Djyachenko, G. A. Zavarzina, 2011. "Application of AVO analysis to seismic records on the Laptev Sea Shelf", Arctic Petroleum Geology, Anthony M. Spencer, Ashton F. Embry, Donald L. Gautier, Antonina V. Stoupakova, Kai Sørensen
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The Laptev Sea shelf basin was affected by phases of Late Mesozoic–Cenozoic rifting and has a thick sedimentary complex associated with linear grabens and horsts, creating trends favourable for hydrocarbon generation. Two groups of complexes are identified in the sedimentary cover: syn-rift between seismic horizon A and LS4 and post-rift between seismic horizon LS4 and seabed. The syn-rift complexes include strata of Late Cretaceous, Paleocene, Eocene and Oligocene–Middle Miocene ages. The post-rift complex includes Pliocene–Quaternary strata. Six seismostratigraphic complexes are identified and traced in the area, using wave field's seismostratigraphic analysis. The boundaries of these complexes are represented by surfaces of unconformities. The wave field of the sedimentary cover contains reflections from gas-bearing sandstones with types 1 and 3 of AVO anomalies. A shift of the anomalies' features from type 3 towards type 1 occurs with increasing depth of the potential deposits in the section.
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The vast Arctic region contains nine proven petroleum provinces with giant resources but over half of the sedimentary basins are completely undrilled, making the region the last major frontier for conventional oil and gas exploration. This book provides a comprehensive overview of the geology and the petroleum potential of the Arctic. Nine papers offer a circum-Arctic perspective on the Phanerozoic tectonic and palaeogeographic evolution, the currently recognized sedimentary basins, the gravity and magnetic fields and, perhaps most importantly, the petroleum resources and yet-to-find potential of the basins. The remaining 41 papers provide data-rich, geological and geophysical analyses and individual oil and gas assessments of specific basins throughout the Arctic. These detailed and well illustrated studies cover the continental areas of Laurentia, Baltica and Siberia and the Arctic Ocean. Of special interest are the 13 papers providing new data and interpretations on the extensive, little known, but promising, basins of Russia.
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