17:
49:
56:
By the year 1985, the imaging methods used by the oil industry were based in signal-processing concepts, and it seemed that modern methods, based on careful waveform modeling and waveform fitting optimization were desirable. The team tried to make real-life demonstrations that the methods of inverse
61:, who authored an influential paper on the inversion of seismic reflection data. The GTG published work on fully nonlinear waveform fitting is possible on seismic exploration data, using elastic modeling and gradient-based optimization techniques (
132:
29:
111:
52:
First fully elastic nonlinear waveform fitting of exploration data (vertical seismic profile). From
Charara et al., 2000.
88:
20:
The group's logo reflected its name, but also a famous formula in least-squares optimization: transpose of G times G.
137:
99:
57:
theory could be applied to the imaging problem typical of seismic exploration. The GTG was founded by
8:
69:
16:
58:
33:
126:
48:
72:
for waveform fitting is being integrated in present-day developments.
36:). During the years 1985-2000 it made developments in the domain of
112:
Inversion of seismic reflection data in the acoustic approximation
40:. The work of the group has been described as pioneering.
124:
47:
15:
125:
38:nonlinear fitting of seismic waveforms
30:Institut de Physique du Globe de Paris
100:(document from Stanford University)
13:
14:
149:
114:. J. Geophysics 49, 1259 (1984).
104:
93:
82:
1:
133:Research institutes in France
75:
26:Geophysical Tomography Group
7:
10:
154:
89:(document from ETH-Zürich)
43:
53:
21:
51:
19:
68:The group's work in
138:Geophysical imaging
70:Monte Carlo method
54:
22:
145:
115:
108:
102:
97:
91:
86:
59:Albert Tarantola
28:was part of the
153:
152:
148:
147:
146:
144:
143:
142:
123:
122:
119:
118:
109:
105:
98:
94:
87:
83:
78:
63:adjoint methods
46:
12:
11:
5:
151:
141:
140:
135:
117:
116:
110:A. Tarantola,
103:
92:
80:
79:
77:
74:
45:
42:
34:Jussieu Campus
9:
6:
4:
3:
2:
150:
139:
136:
134:
131:
130:
128:
121:
113:
107:
101:
96:
90:
85:
81:
73:
71:
66:
64:
60:
50:
41:
39:
35:
31:
27:
18:
120:
106:
95:
84:
67:
62:
55:
37:
25:
23:
127:Categories
76:References
44:History
24:The
65:).
129::
32:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
.jpg)
