Shear Wave Splitting Analysis to Estimate Fracture Orientation and Frequency Dependent Anisotropy

• Autorzy: Gholami R. , Moradzadeh A. , Rasouli V. , Hanachi J.

Identyfikatory

DOI

10.1515/acgeo-2015-0060

• Języki publikacji: EN

Abstrakty

EN

Shear wave splitting is a well-known method for indication of orientation, radius, and length of fractures in subsurface layers. In this paper, a three component near offset VSP data acquired from a fractured sandstone reservoir in southern part of Iran was used to analyse shear wave splitting and frequency-dependent anisotropy assessment. Polarization angle obtained by performing rotation on radial and transverse components of VSP data was used to determine the direction of polarization of fast shear wave which corresponds to direction of fractures. It was shown that correct implementation of shear wave splitting analysis can be used for determination of fracture direction. During frequencydependent anisotropy analysis, it was found that the time delays in shearwaves decrease as the frequency increases. It was clearly demonstrated throughout this study that anisotropy may have an inverse relationship with frequency. The analysis presented in this paper complements the studied conducted by other researchers in this field of research.

Słowa kluczowe

EN

shear wave splitting; vertical seismic profile; fracture; frequency; seismic anisotropy; Iran

PL

rozdzielenie fali poprzecznej; pionowe profile sejsmiczne; pęknięcie; częstotliwość; anizotropia sejsmiczna; Iran

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 1
• Strony: 76--100
• Opis fizyczny: Bibliogr. 41 poz.

Twórcy

autor

Gholami R.

• Department of Chemical and Petroleum Engineering, Curtin University, Sarawak, Malaysia

autor

Moradzadeh A.

• Department of Chemical and Petroleum Engineering, Curtin University, Sarawak, Malaysia
• Department of Mining, Petroleum and Geophysics, Shahrood University of Technology, Shahrood, Iran

autor

Rasouli V.

• Department of Petroleum Engineering, University of North Dakota, Grand Forks, USA

autor

Hanachi J.

• Petroleum Geology, Tehran, Iran

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