The project is a Norwegian-Russian joint effort funded through the NORRUSS program of the Norwegian Research Council.
Seismic forward modelling involves forward realization of a given geological model. (Carcione et al, 2002). The project intends to map out seismic response of a matrix of realistic fault zone models in order to establish how specific fault zone features and properties affect the seismic signal. The geological models will be built using realistic constraints to fault architecture and properties derived from published literature and Uni CIPR’s in-house database compiled over the last decade. Input models to the forward seismic modelling will range from simple to complex. By keeping full control over geological input parameter and stepwise changing individual parameter settings, this should allow correlation of seismic response to fault zone structure and petrophysical properties and ultimately allow identification or at least constraining of sub-surface fault zone structure. The results can be employed in two ways: 1) extracting new structural information from seismic images of fault zones which so far have not been utilized to its full potential, and 2) provide seismic conditioning for sub-surface fault zone models.
Example of fault zone model (Qu and Tveranger, in press) showing distribution of deformation band as fault facies. These models are used as input for forward seismic modelling to establish the relation between geologic parameters and seismic response.
WP1: Geological characterization and description of fault and fracture zones.
The aim of WP1 is to define, compile and organize the input data for the geological fault zone models. This includes identification and spatial statistic characterization of geometrical and petrophysical properties of fault and fracture zones. For this purpose we will employ a combination of published data and Uni CIPR’s in-house database. The aim is to provide realistic geological constraints for fault zone models and. Work will mainly be carried out by Uni CIPR.
WP2: Geological models of fault and fracture zones.
Uni CIPR has developed a unique method for explicit 3D modelling of fault zones. The database provided by WP1 will serve as input to generate fault zone models of varying complexity using realistic constraints. WP2 will provide a matrix of models where Individual parameters have been varied systematically. This will allow studying the influence of these individual parameters on seismic response in WP3. Work will be carried out jointly by Uni CIPR and the Trofimuk Institute.
WP3: Seismic characterization of fault and fracture zones
The model matrix generated in WP2 will serve as input to the forward seismic modelling. This will proceed along two paths: The first involves the use of an existing pre-stack depth migration (PSDM) simulator. This part of the study will mainly be handled by the University of Stavanger but in close cooperation with the other partners on geo-model set-ups and the analysis of results.
The second path in WP3 involves using Russian supercomputers available to the Trofimuk Institute to perform seismic simulation of high-resolution models provided by WP2 in order to systematically investigate seismic signatures of different fault zone architectures and properties. For further detail we refer to the Russian part of the twin-proposal submitted to the Russian Foundation for Basic Research by the Trofimuk Institute. This part of the study will be carried out by the Trofimuk Institute in close cooperation with Uni CIPR.
Research partners: Uni Research CIPR (lead), Trofimuk Institute for Petroleum Geology and Geophysics at Novosibirsk State University, University of Stavanger.
Qu, D., Røe, P. and Tveranger, J. 2015: A method for generating volumetric fault zone grids for pillar gridded reservoir models. Computers and Geosciences 81, 28-37.
Qu, D and Tveranger, J. in press: Incorporation of deformation band fault damage zones in reservoir models. AAPG Bulletin.
Vishnevsky, D.M., Kolyukhin, D.R., Qu, D., Lisitsa, V.V., Protasov, M.I., Tveranger, J., and Cheverda, V.A. 2014: Statistical analysis of seismic images of fault facies model. Tekhnologii Seismorazvedki (Seismic Technologies), 2014, N4, 25-33.
Kolyukhin, D., Torabi, A. and Tveranger, J. 2014: Statistical analysis of fault attributes and relation between them; Simulation of fault zone structures. Second Russian - French Workshop on computational Geophysics, Berdsk, Russia, September 22-25, 2014.
Kolyukhin, D. and Tveranger, J. 2015: Statistical modelling of fault core and deformation bands structure in fault damage zone. 77th EAGE Conference & Exhibition, Madrid June 1-4. 2015.
Kolyukhin, D., Lisitsa, V., Qu, D., Protasov, M., Tcheverda, V., Tveranger, J.and Vishnevsky, D. 2015: Seismic imaging of fault facies models - a pilot study. Fourth international conference on fault and top seals, September 20.24, Almeria, Spain.
Qu, D. and Tveranger, J. 2014: Influence of deformation band fault damage zones on subsurface fluid flow. Small to Subseismic scale reservoir deformation. Geological Society Burlington House, October 29-30 2014.
Qu, D., Tveranger, J. and Fachri, M. 2015: Sensitivity of reservoir performance to fault damage zone properties. Recognizing the Limits of Reservoir Modelling, Geological Society of London, Aberdeen, March 4-5 2015.
Tveranger, J. 2014: Characterization of fault zones: constraints and challenges to description and modelling. Keynote, Second Russian - French Workshop on computational Geophysics, Berdsk, Russia, September 22-25, 2014.