13:00 〜 13:20
[1K62507-18-01] 地震波干渉法による擬似クロスダイポール法を用いた陸上データにおけるS波伝播速度異方性情報推定法の実現可能性の基礎的検証 (発表者：博士課程)
キーワード：地震波干渉法、S波伝播速度異方性、クロスダイポール探査
In this study we would like to demonstrate the feasibility test of shear wave survey in onshore case using virtual cross-dipole data. The virtual cross-dipole data is generated by utilizing seismic interferometry to horizontal components of seismic records received with two different receivers.
In our theory in order to generate the virtual cross-dipole data the source could be monopole source and we don’t need shear wave source, which is high cost seismic source.
For feasibility test of our methodology we firstly conduct the simple numerical test with single anisotropic target and single survey line of 3 components of geophones. With these virtual cross-dipole data we estimate the anisotropic parameter in the target layer.
Adding to it we conducted a simple feasibility test with 2D 3 components onshore data, Canadian Blackfoot.
Each test shows the reasonable estimation accuracy, and we conclude that our methodology has possibility of anisotropic parameter estimation in broad area with relatively easy way of shear wave survey.
In our theory in order to generate the virtual cross-dipole data the source could be monopole source and we don’t need shear wave source, which is high cost seismic source.
For feasibility test of our methodology we firstly conduct the simple numerical test with single anisotropic target and single survey line of 3 components of geophones. With these virtual cross-dipole data we estimate the anisotropic parameter in the target layer.
Adding to it we conducted a simple feasibility test with 2D 3 components onshore data, Canadian Blackfoot.
Each test shows the reasonable estimation accuracy, and we conclude that our methodology has possibility of anisotropic parameter estimation in broad area with relatively easy way of shear wave survey.
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