Skip to Main content Skip to Navigation
Journal articles

Generating variable shapes of salt geobodies from seismic images and prior geological knowledge

Abstract : We have developed an implicit method to automatically generate several possible models of salt top surfaces with varying geometries and topologies. This method can be conditioned to available data such as well markers and seismic picks. As seismic imaging of salt is prone to velocity uncertainty and Fresnel zone effects, the input of the method is a seismic image that is segmented into three regions: salt, sediments and uncertain. The uncertain region contains the salt boundary and all the further computations focus within this zone. A monotonic scalar field, ranging from zero on the edge of the certain salt body to one on the maximal possible salt boundary, defines the cumulated probability for a point to be outside the salt body. A random scalar field, also bounded between zero and one, is then used as a threshold for the first scalar field. The salt boundary is implicitly defined by the zero isovalue of the difference between the two fields, and can be further extracted using marching cubes. The random field parameters have a geometrical and topological impact on the simulated salt volumes. They can be adapted to reproduce specific geological features, but their inference remains difficult. The application of the method to the reconstruction of diapir boundaries from a set of partly interpreted sections shows that it is well suited to honor numerous constraining data while proposing different possible structural scenarios in the uninterpreted parts.
Document type :
Journal articles
Complete list of metadata

Cited literature [51 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/hal-02331647
Contributor : Pauline Collon <>
Submitted on : Thursday, October 24, 2019 - 2:26:34 PM
Last modification on : Wednesday, November 4, 2020 - 1:56:03 PM
Long-term archiving on: : Saturday, January 25, 2020 - 4:27:40 PM

File

2019Pap_Clausolles_Interp_PreP...
Files produced by the author(s)

Identifiers

Citation

Nicolas Clausolles, Pauline Collon, Guillaume Caumon. Generating variable shapes of salt geobodies from seismic images and prior geological knowledge. Interpretation, SAGE Publications, 2019, 7 (4), pp.829 - 841. ⟨10.1190/INT-2019-0032.1⟩. ⟨hal-02331647⟩

Share

Metrics

Record views

137

Files downloads

582