Statistical analysis of free-surface variability's impact on seismic wavefield

D. R. Kolyukhin, V. V. Lisitsa, V. A. Tcheverda

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

One of the main challenges in seismic monitoring is the repeatability of the experiment conditions. Among other reasons changes in surface topography over time may cause strong non-repeatability in acquired seismic data especially in desert environment where the sand dunes can move between surveys. In this paper we present a numerical study of the effects of free-surface variation, defined as homogeneous Gaussian random field, on the seismic data. We show that for homogeneous models repeatability metrics (such as NRMS and predictability) using the early arrivals as measured by buried receivers depend mainly on the perturbation, but not on the smooth trend of the free-surface topography. For models with complex near-surface velocity NRMS for the thin sand area (<5 m) is almost twice as high as in the thick sand area (>10 m). Moreover, we demonstrate that significant non-repeatability (NRMS up to 70%) can be caused by just surface elevation changes.

Язык оригиналаанглийский
Название основной публикации7th EAGE Saint Petersburg International Conference and Exhibition
Подзаголовок основной публикацииUnderstanding the Harmony of the Earth's Resources Through Integration of Geosciences
ИздательEuropean Association of Geoscientists and Engineers, EAGE
Страницы434-438
Число страниц5
ISBN (электронное издание)9781510822498
DOI
СостояниеОпубликовано - 2016
Опубликовано для внешнего пользованияДа
Событие7th EAGE Saint Petersburg International Conference and Exhibition: Understanding the Harmony of the Earth's Resources Through Integration of Geosciences - Saint Petersburg, Российская Федерация
Продолжительность: 11 апр 201614 апр 2016

Серия публикаций

Название7th EAGE Saint Petersburg International Conference and Exhibition: Understanding the Harmony of the Earth's Resources Through Integration of Geosciences

Конференция

Конференция7th EAGE Saint Petersburg International Conference and Exhibition: Understanding the Harmony of the Earth's Resources Through Integration of Geosciences
СтранаРоссийская Федерация
ГородSaint Petersburg
Период11.04.201614.04.2016

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