Method for generating reservoir models utilizing synthetic stratigraphic columns
AssigneeChevron U.S.A. Inc.
InventorsDavid A. Wilkinson, Deyi Xie
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Abstract
The present invention incorporates the use of geophysical, geological and formation evaluation data to develop synthetic stratigraphic columns based on depositional rules and sedimentary stacking patterns. The present invention utilizes dynamic assignment and matching whereby the synthetic columns can be easily conformed throughout the reservation characterization process as geological data becomes available.
Claims14
A method of modeling a fully labeled synthetic stratigraphic column for populating a reservoir model, comprising the steps of:
- (a) assigning dynamically a plurality of stratigraphic units to the synthetic stratigraphic column based upon pre-selected geological patterns;
- (b) assigning dynamically elastic geological properties to each of the stratigraphic units in the synthetic stratigraphic column based upon pre-selected geological patterns;
- (c) sampling the synthetic stratigraphic column to provide elastic property logs;
- (d) converting the elastic property logs to a synthetic seismogram;
- and
- (e) matching dynamically the synthetic seismogram to a corresponding seismogram in a set of real seismograms to obtain coordinates for the synthetic stratigraphic column within the reservoir model.
A system for generating a model of fully labeled synthetic stratigraphic column for populating a reservoir model comprising:
- a plurality of stratigraphic units that are dynamically assigned to the synthetic stratigraphic column based upon pre-selected geological patterns;
- a plurality of elastic geological properties that are dynamically assigned to each of the stratigraphic units in the synthetic stratigraphic column based upon pre-selected geological patterns;
- a synthetic seismogram that has been converted from a sampling of the plurality of elastic geological property logs from the synthetic stratigraphic column;
- and
- a set of real seismograms, wherein the synthetic seismogram has been matched dynamically to at least one of the set of real seismograms to obtain coordinates for the synthetic stratigraphic column within the reservoir model.
A method of modeling a fully labeled synthetic stratigraphic column for populating a reservoir model, comprising the steps of:
- (a) building a hierarchical stratigraphic framework;
- (b) defining a lithology fining index table which describes relative textures;
- (c) integrating real well data into the hierarchical stratigraphic framework;
- (d) constructing stratigraphic rules to be used in building the synthetic stratigraphic column;
- (e) defining lithology property rules with constraints;
- and
- (f) generating the synthetic column incorporating the hierarchical stratigraphic framework, the stratigraphic rules and the lithology property rules, wherein geological units included in the synthetic column are dynamic.
Dependencies are inferred from the claim text.