Fracture-direction estimation by QVOA analysis: Validation by physical modeling

Tatiana Chichinina, Elena Kazatchenko, Vladimir Sabinin, Dmitry Popov, Viacheslav Polovkov, Jianxin Wei, Pinbo Ding

Результат исследований: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференции

Аннотация

We study anisotropy of P-wave attenuation that is Q-anisotropy, and develop an approach named QVOA (seismic quality factor Q versus offset and azimuth) to estimate the fracture-strike direction identified by the azimuth ?0. We derive QVOA formula Q-1(?, ?) for the P-wave attenuation Q-1 as a function of the polar angle ? and azimuth ?, and test Q-1(?,?) using physical modeling data. Our testing consists of fitting a function Q-1(?, ?) to the data from the physical modeling, using the method of least squares. The QVOA-formula gives the most accurate estimation of the direction ?0 of the HTI-symmetry axis in comparison with other approximation formula. The values of velocity and attenuation are, in some sense, reciprocals of each other: the attenuation is greatest in the direction of the HTI-symmetry axis ?0=0°, where the velocity is least, and vice versa at the orthogonal direction ?=90°, which is the fracture-strike direction. That is, the azimuth of the minimal attenuation ?=90° coincides with the direction of the fracture strike (?=90°), where the velocity is maximal.

Язык оригиналаанглийский
Название основной публикацииSEG International Exposition and Annual Meeting 2019
ИздательSociety of Exploration Geophysicists
Страницы378-383
Число страниц6
DOI
СостояниеОпубликовано - 1 янв 2020
СобытиеSociety of Exploration Geophysicists International Exposition and Annual Meeting 2019, SEG 2019 - San Antonio, Соединенные Штаты Америки
Продолжительность: 15 сен 201920 сен 2019

конференция

конференцияSociety of Exploration Geophysicists International Exposition and Annual Meeting 2019, SEG 2019
СтранаСоединенные Штаты Америки
ГородSan Antonio
Период15/09/1920/09/19

Предметные области Scopus

  • Геофизика

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