Structural a priori information for reflection tomography

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:80326

Jannaud, L; Delprat-Jannaud, F ^[1]

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1. Inst. Francais du Petrole, Pau (France)

The model calculated by traveltime inversion is underdetermined. One solution to this problem is to introduce a priori information so as to reduce the set of possible solutions to those satisfactory from a geological point of view. In this paper, the authors impose geological constraints on the relative position of the reflectors and in particular on the location in depth of faults. To implement this method in the context of a Gauss-Newton algorithm for the inversion, the Jacobian of the impact points with respect to the model is computed. They thus compute, using the adjoint state technique, the exact jacobian at a low computational cost. To illustrate the efficiency of the method, field data acquired on fault structures are inversed. They obtain a structural model which is satisfactory from both a kinematic and a geological point of view.

• OSTI ID: 80326
• Report Number(s): CONF-941015--
• Country of Publication: United States
• Language: English

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