Effect of surface sand topography changes on repeatability of land Seismic data in desert environment

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

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

Аннотация

Seismic monitoring in desert environments has many challenges and changes in surface sand topography in one of them. We present a numerical study of the impact of surface elevation changes on repeatability of seismic data recorded with buried receivers. We focus on the early arrivals since they are affected only by the near-surface structure. We define changes in the surface topography as a homogeneous Gaussian random field. We show that for a homogeneous near surface layer, NRMS and predictability depend only on changes in the surface topography but not on its slope. For a heterogeneous near surface we observe worse repeatability for the zones with a thin sand layer (< 5 m), whereas areas of thick sand (> 10m) behave similarly to a homogeneous model may cause significant non-repeatability up to 60% of NRMS error and predictability down to 75%. These numbers are similar to the NRMS measured on field data in Saudi Arabia, suggesting that such factors may be significant for land 4D seismic in a desert. In addition, sand topography variations can accumulate thus explaining experimentally observed trends showing that land seismic repeatability degrades over time from days to months to years.

Язык оригиналаанглийский
Название основной публикации77th EAGE Conference and Exhibition 2015
Подзаголовок основной публикацииEarth Science for Energy and Environment
ИздательEuropean Association of Geoscientists and Engineers, EAGE
Страницы1400-1404
Число страниц5
ISBN (электронное издание)9781510806627
DOI
СостояниеОпубликовано - июн 2015
Опубликовано для внешнего пользованияДа
Событие77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment - Madrid, Испания
Продолжительность: 1 июн 20154 июн 2015

Серия публикаций

Название77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment

Конференция

Конференция77th EAGE Conference and Exhibition 2015: Earth Science for Energy and Environment
СтранаИспания
ГородMadrid
Период01.06.201504.06.2015

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