Annual Report 2000 - WIT
Annual Report 2000 - WIT Annual Report 2000 - WIT
94 1 taper value ksi1 0 ksi2 Figure 2: Taper function in 3D. In this plot, the number of traces which are tapered is enlarged compared to the overall number of traces to show the effect more clearly. APPLICATION We have applied our imaging tool to several synthetic datasets to show how trueamplitude migration and demigration work. The development and the application on synthetic and real datasets are going on. The current version of the program is able to handle 2D and 3D true-amplitude poststack migration and demigration, and 2D trueamplitude prestack migration. The 3D prestack case is not considered at the moment due to limitations in available computing facilities. We cannot really expect that the theory presented here and the respective weight functions and algorithms work well for all earth models. However, the following results show that our imaging tool is able to handle various input datasets in a flexible and accurate way.
95 Figure 3: Isochrone. This curve is obtained by migrating a single event, here for zero offset (ZO) configuration and (for simplicity) constant velocity. In a homogeneous medium, the ZO isochrone is a semicircle (2D) or a hemisphere (3D). Figure 4: Huygens curve. This curve is obtained by demigrating a single diffraction point, here for zero offset (ZO) configuration and (for simplicity) constant velocity. In a homogeneous medium, the ZO Huygens curve is a hyperbola (2D) or a hyperboloid (3D).
- Page 55 and 56: 43 0.2 Distance [m] 1000 1500 2000
- Page 57 and 58: 45 In Figure 10 we have the optimiz
- Page 59: 47 Gelchinsky, B., 1989, Homeomorph
- Page 62 and 63: § ¢ ø ø for a paraxial ray, ref
- Page 64 and 65: Œ § … Z ‹ Z § õ ø \ ø §
- Page 66 and 67: 54 As stated in Hubral and Krey, 19
- Page 68 and 69: § ó § 56 sequence. We made tes
- Page 70 and 71: 58 precision of the modeled input d
- Page 72 and 73: 60 Cohen, J., Hagin, F., and Bleist
- Page 75 and 76: Wave Inversion Technology, Report N
- Page 77 and 78: £ 65 The details of the theory inv
- Page 79 and 80: 67 of the figure. On both sides, a
- Page 81 and 82: 69 (a) (b) Depth (m) 600 800 Depth
- Page 83 and 84: 71 Langenberg, K., 1986, Applied in
- Page 85 and 86: È Û Ñ¿ = ¨ Í Ñ>* = ¿ + ð
- Page 87 and 88: Wave Inversion Technology, Report N
- Page 89 and 90: g ý g [ ^ â g [ g g g g g â h [
- Page 91 and 92: g § » ¹ [ƒŽ g 79 We now subst
- Page 93 and 94: ê 81 ing was realized by an implem
- Page 95 and 96: ˆ 83 -0.05 -0.1 Amplitude -0.15 -0
- Page 97: 85 on a second-order approximation.
- Page 100 and 101: 88 kinematic (related to traveltime
- Page 102 and 103: ¨ º Ý È · § À · Á · Á ¼
- Page 104 and 105: ° ´ ´ ã ° ¼ ´ ´ þ Ò Ò ¥
- Page 108 and 109: 96 0 1 2 3 4 5 Depth [km] CMP [km]
- Page 110 and 111: 98 CONCLUSION As a generalization o
- Page 112 and 113: 100 weight during the stacking proc
- Page 114 and 115: 102 are not illuminated for every o
- Page 116 and 117: 104 obtained from Zoeppritz' equati
- Page 118 and 119: 106 PreSDM of Porous layer 0.358 re
- Page 120 and 121: 108 REFERENCES Gassmann, F., 1951,
- Page 122 and 123: 110 et al., 1992), Hanitzsch (1997)
- Page 124 and 125: 112 consecutive wavefronts). Howeve
- Page 126 and 127: 114 Numerical example We test the W
- Page 128 and 129: 116 Versteeg, R., and Grau, G., 199
- Page 130 and 131: 118 indicator. To extract elastic p
- Page 132 and 133: € b b 120 S where is the position
- Page 134 and 135: É É É É 122 The À constant (da
- Page 136 and 137: 124 0 Distance [ m ] 1000 2000 3000
- Page 138 and 139: 126 Kosloff, D., Sherwood, J., Kore
- Page 140 and 141: 128
- Page 142 and 143: 130 penetration distances and a pot
- Page 144 and 145: and » ˆ Ö Ö is the scalar hydra
- Page 146 and 147: Å éÙó ó ».-.‹œì/-j쨋
- Page 148 and 149: 136 TRIGGERING FRONTS IN HETEROGENE
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- Page 152 and 153: Ö Ö Ê » Ø Ö » Ö Ê Ê Ê Ö
- Page 154 and 155: 142 300 250 200 a) eikonal equation
95<br />
Figure 3: Isochrone. This curve is obtained by migrating a single event, here for zero<br />
offset (ZO) configuration and (for simplicity) constant velocity. In a homogeneous<br />
medium, the ZO isochrone is a semicircle (2D) or a hemisphere (3D).<br />
Figure 4: Huygens curve. This curve is obtained by demigrating a single diffraction<br />
point, here for zero offset (ZO) configuration and (for simplicity) constant velocity. In<br />
a homogeneous medium, the ZO Huygens curve is a hyperbola (2D) or a hyperboloid<br />
(3D).
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