Estimating subsurface elastic parameters
AssigneeSchlumberger Technology Corporation
InventorsStephen Allan Horne, Douglas E. Miller
Life of this patent
Estimating the term…
Abstract
A method for estimating subsurface elastic parameters is described herein. One or more slowness vectors may be determined based on a vertical seismic profile of a subsurface area. A model containing anisotropy parameters and a well deviation estimate may be generated based on survey data. The slowness vectors may be corrected for the well deviation estimate based on the model. One or more modeled slowness vectors may be calculated using the corrected slowness vectors and the anisotropy parameters in the model.
Claims20
A method for estimating subsurface elastic parameters, comprising:
- determining one or more slowness vectors based on a vertical seismic profile of a subsurface area;
- generating a model containing anisotropy parameters and a well deviation estimate based on survey data;
- correcting the slowness vectors for the well deviation estimate based on the model;
- and
- calculating one or more modeled slowness vectors using the corrected slowness vectors and the anisotropy parameters in the model.
A computer-readable medium having stored thereon program instructions executable by a processor to:
- determine one or more slowness vectors based on a vertical seismic profile of a subsurface area;
- generate a model containing anisotropy parameters based on a priori data, wherein the model comprises anisotropy parameters and a well deviation estimate;
- correct the slowness vectors for the well deviation estimate based on the model;
- and
- calculate one or more modeled slowness vectors using the corrected slowness vectors and the anisotropy parameters in the model.
A system, comprising:
- a processor;
- and
- a memory comprising program instructions executable by the processor to:
- determine one or more slowness vectors based on a vertical seismic profile of a subsurface area;
- generate a model based on apriori data, wherein the model comprises anisotropy parameters and a well deviation estimate;
- correct the slowness vectors for the well deviation estimate based on the model;
- calculate one or more modeled slowness vectors using the corrected slowness vectors and the model;
- compare the modeled slowness vectors with the corrected slowness vectors;
- determine whether the model is representative of the subsurface area based on the comparison and a convergence criteria;
- and
- use the model to enhance a seismic image upon determining that the model is representative of the subsurface area.
Dependencies are inferred from the claim text.