Abstract
At present due to depletion of reserves in the majority of Western Siberia oil and gas fields, with reservoirs mainly related to lower Cretaceous and Jurassic section interval, the basement intervals present primary scientific and practical interest for prospecting and exploration. At the Bystrovka vibroseismic test site (Novosibirsk region), the Paleozoic basement occurs at depth of about 10 m. This allowed investigating its elastic properties with shallow seismic technique using VSP. Results of these investigations are presented in the present paper.
Highlights
At the Bystrovka vibroseismic test site (Novosibirsk region), the Paleozoic basement occurs at depth of about 10 m
This allowed investigating its elastic properties with shallow seismic technique using VSP
Results of these investigations are presented in the present paper
Summary
At present due to depletion of reserves in the majority of Western Siberia oil and gas fields, with reservoirs mainly related to lower Cretaceous and Jurassic section interval, the basement intervals present primary scientific and practical interest for prospecting and exploration. At the Bystrovka vibroseismic test site (Novosibirsk region), the Paleozoic basement occurs at depth of about 10 m. This allowed investigating its elastic properties with shallow seismic technique using VSP. По данным регистрации продольных волн не всегда удается легко различить эффекты, связанные с неоднородностью и анизотропией упругих свойств, и для этого необходима весьма подробная система наблюдений [Пузырев и др., 1985]. Из динамических характеристик для определения анизотропии наиболее важны параметры поляризации поперечных и обменных волн. Поляризационный анализ поперечных и обменных волн позволяет разделить волны S1 и S2 в случае их интерференции и определить параметры их поляризации, связанные с характеристиками анизотропной среды [Crampin, Lovell, 1991]. На рисунке 1 приведен фрагмент геологической карты Новосибирской области, на котором красной стрелкой указано расположение полигона.
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