Annual Report 2000 - WIT

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280 Research Group Hamburg (Gajewski) Applied Geophysics Group (AGG) Group leader: Dirk Gajewski Research associates: Tim Bergmann Ekkehart Tessmer Ph.D. students: Radu Coman Elive Menyoli Svetlana Soukina Claudia Vanelle Master students: Sebastian Barth Christian Herold Tina Kaschwich Maximilian Krüger High frequency asymptotics for imaging and modeling Effects of nonlinear elastic behaviour on wave propagation. Full wave form modeling. Hybrid method for travel time computation in 3D complex media Prestack depth migration of converted waves Material parameter determination in anisotropic media Model independent time processing Processing and migration of wide angle observations Processing of long spread reflection seismic data 3D Wave front construction AVO modeling Research Group Campinas (Tygel) Group leaders: Modeling by Demigration, Kirchhoff Migration, Traveltime Inversion, Configuration Transforms,Kirchhoff Modeling, AVO/A Analysis, CRS Stack,2.5-D Wave Propagation Lúcio Tunes Santos Jörg Schleicher, Martin Tygel, Visting Professors:
281 Norman Bleistein Teaching and developing seismic reflector mapping methods Ph.D.Students: Ricardo Biloti Multiparameter Velocity Analysis João Luis Martins Migration and Demigration in 2.5 Dimensions Rodrigo Portugal Configuration Transforms in 2.5D Carlos Piedrahita Matthias Riede Maria Amélia Novais Schleicher Seismic Ray Tracing in Blocked Media Modeling by Demigration Modeling of Reflections and Diffractions by a unified Born-Kirchhoff approximation. Master Sudents: Sérgio da Silva Araújo Valéria Grosfeld Claudio Guerra Angela Maria Vasquez CRS Processing Kirchhoff-type multiple elimination. True-amplitude MZO Research Students: Vanessa Giuriati Thomas Hertweck Marina Magalhães Guliana Nascimento Research Group Berlin (Shapiro) Group leader: Sergei A. Shapiro Permeability, Seismic Inversion, Random Media Wave Propagation Research associates: Stefan Buske Erik Saenger Seismic modeling and inversion, deep seismic sounding and parallel programming Simulation of elastic wave propagtion through heterogeneous and fractured media. Application of parallel computing devices.
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Wave Inversion Technology WIT Annua
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Wave Inversion Technology WIT Wave
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Copyright c 2000 by Karlsruhe Unive
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i TABLE OF CONTENTS Reviews: WIT Re
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Wave Inversion Technology, Report N
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3 theory. It relates properties of
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Imaging 5
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8 two hypothetical eigenwave experi
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7 ¢¥£§¦©¨ ; < calculate sear
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7 7 searches ¡ HNJOL for ¢IHNJML
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14 Trace no. 1000 1500 2000 0.5 1.0
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16 CDP number 3100 3000 2900 2800 2
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18 REFERENCES Höcht, G., de Bazela
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20 INVERSION BY MEANS OF CRS ATTRIB
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22 For synthetic data, it is easy t
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— J J J J J J G J - J J G
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· · v 0 B 0 £ & Ä Ã & v
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31 Dürbaum, H., 1954, Zur Bestimmu
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Ã Ø Ì 0 0 Ì 4 0 Ã 0 G ' 4
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0 0 ˜ ” Z ˜ ” Z 4 4
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39 strategy by combining global and
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41 elled data is presented in Figur
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43 0.2 Distance [m] 1000 1500 2000
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45 In Figure 10 we have the optimiz
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47 Gelchinsky, B., 1989, Homeomorph
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§ ¢ ø ø for a paraxial ray, ref
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Œ § … Z ‹ Z § õ ø \ ø §
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54 As stated in Hubral and Krey, 19
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§ ó § 56 sequence. We made tes
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58 precision of the modeled input d
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60 Cohen, J., Hagin, F., and Bleist
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£ 65 The details of the theory inv
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67 of the figure. On both sides, a
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69 (a) (b) Depth (m) 600 800 Depth
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71 Langenberg, K., 1986, Applied in
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È Û Ñ¿ = ¨ Í Ñ>* = ¿ + ð
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g ý g [ ^ â g [ g g g g g â h [
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g § » ¹ [ƒŽ g 79 We now subst
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ê 81 ing was realized by an implem
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ˆ 83 -0.05 -0.1 Amplitude -0.15 -0
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85 on a second-order approximation.
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88 kinematic (related to traveltime
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¨ º Ý È · § À · Á · Á ¼
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° ´ ´ ã ° ¼ ´ ´ þ Ò Ò ¥
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94 1 taper value ksi1 0 ksi2 Figure
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96 0 1 2 3 4 5 Depth [km] CMP [km]
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98 CONCLUSION As a generalization o
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100 weight during the stacking proc
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102 are not illuminated for every o
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104 obtained from Zoeppritz' equati
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106 PreSDM of Porous layer 0.358 re
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108 REFERENCES Gassmann, F., 1951,
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110 et al., 1992), Hanitzsch (1997)
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112 consecutive wavefronts). Howeve
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114 Numerical example We test the W
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116 Versteeg, R., and Grau, G., 199
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118 indicator. To extract elastic p
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€ b b 120 S where is the position
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É É É É 122 The À constant (da
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124 0 Distance [ m ] 1000 2000 3000
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126 Kosloff, D., Sherwood, J., Kore
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128
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130 penetration distances and a pot
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and » ˆ Ö Ö is the scalar hydra
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Å éÙó ó ».-.‹œì/-jì¨‹
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136 TRIGGERING FRONTS IN HETEROGENE
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Ö ˆ Ö “P£'ˆ é ˆ ó,Lˆ¨
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Ö Ö Ê » Ø Ö » Ö Ê Ê Ê Ö
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142 300 250 200 a) eikonal equation
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144 Shapiro, S. A., and Müller, T.
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» i » m ×]Ú ‘Œƒšj'Ÿlk hM
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148 RESULTS Soultz-sous-Forêts Inv
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…„ƒ 150 for the smaller ellips
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152 Figure 5: The cloud of events f
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…„ƒ Î Î ÎÄÈ‹•¨ Î-È
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156 straightforward. The new approa
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158
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160 1982). There is also the so-cal
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{ ³ u ´ ´ ´ ´ -y ›-^œ ´ ´
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Ï u u ¬ 164 To summarize, we deri
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Ý ì á ä é å¤æDçzè ä é
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ø M ã = ã Ù ø ä Ú ã Ù ø
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ã Q c ã ä 170 a=10m; std.dev.=8%
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172 Frankel, A., and Clayton, R. W.
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174 It is well-known that inhomogen
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ã ä ä ŸSŸ S ¡S¡ ©©¨¨ æ
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Kneib, 1995 285-6000 superposition
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180 parameter: Hurst coefficient pa
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182 REFERENCES Bourbié, T., Coussy
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184 1999) in multiple fractured med
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‹œž Ÿ¢¡¤£¦¥ƒ§©¨ ‘
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j jÆÅÇ[È”u j jÎÅÇ[È”uw
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190 Davis, P. M., and Knopoff, L.,
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192 properties from the measured se
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194 discussion of these problems ca
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196 Altogether, close to 260 shotpo
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198 Time (ms) 0 2 4 6 8 10 12 14 16
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200 of groundwater. ACKNOWLEDGEMENT
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202
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204 the wavefront curvature matrix
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û ò é from ã äñ to ã î§ñ
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é 208 Table 1: Median relative err
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210 Table 2: Median relative errors
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212 CONCLUSIONS We have presented a
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214 PUBLICATIONS Previous results c
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æVU ìÿå T ü ýWYXZX[ 9\]9^\ Þ
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218 weight functions from traveltim
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220 REFERENCES Bleistein, N., 1986,
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226
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228 In this paper, we present a mor
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Page 244 and 245: 232 Figure 3: The evolution of a WF
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Page 260 and 261: 248 Ettrich, N., 1998, FD eikonal s
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Page 268 and 269: ‹ 256 transport equation. Neverth
Page 270 and 271: 258 tivalued geometrical spreading
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Page 274 and 275: 262
Page 276 and 277: … " ¯ ü ý +- 4=° ü ü +
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Page 280 and 281: 268 NUMERICAL RESULTS We constructe
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Page 284 and 285: £ -š' - 272 Ô- —- Figure 6: C
Page 286 and 287: 274 REFERENCES Aldridge, D. F. (199
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Page 290 and 291: 278 3. 4. True-amplitude imaging, m
Page 294 and 295: 282 Stefan Lüth Robert Patzig Refr
Page 296 and 297: 284 Landmark Graphics Corp. 7409 S.
Page 298 and 299: 286 TotalFinaElf Exploration UK plc
Page 300 and 301: 288 as research assistant at Geoeco
Page 302 and 303: 290 Ingo Koglin is a diploma studen
Page 304 and 305: 292 Matthias Riede received his M.S
Page 306 and 307: 294 Svetlana Soukina received her d
Page 308: 296 Yonghai Zhang received the Mast
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