Method and apparatus for simultaneous geostatistical inversion of time-lapse seismic data
AssigneeCgg Services SAS
InventorRaphael Bornard
Life of this patent
Estimating the term…
Abstract
Properties of underground formations are obtained by performing simultaneous geostatistical inversion of two or more seismic datasets acquired over the same area. These methods enable simultaneous estimating quantitative changes in a hydrocarbon-producing field.
Claims20
A method for geostatistical inversion of time-lapse data, the method comprising:
- receiving at least two seismic datasets acquired at different survey times, respectively, over at least partially overlapping areas;
- performing simultaneous geostatistical inversion of the at least two datasets to obtain realizations of parameters that characterize one or more underground structures, the one or more underground structures being repeatedly surveyed when acquiring the at least two seismic datasets, and the realizations being compatible with the at least two acquired seismic datasets;
- and
- estimating evolution of the parameters in the one or more underground structures using the realizations, the evolution being used as a basis for hydrocarbon production-related decisions.
A seismic data processing apparatus comprising:
- a communication interface configured to receive at least two seismic datasets acquired at different survey times, respectively, over at least partially overlapping areas;
- and
- a data processing unit connected to the communication interface and configured
- to perform simultaneous geostatistical inversion of the at least two datasets to obtain realizations of parameters that characterize one or more underground structures, the one or more underground structures being repeatedly surveyed when acquiring the at least two seismic datasets, and the realizations being compatible with the at least two acquired seismic datasets, and
- to estimate evolution of the parameters in the one or more underground structures using the realizations, the evolution being then used as a basis for hydrocarbon production-related decisions.
A non-transitory computer readable medium storing executable codes which, when executed by a processor having access to at least two seismic datasets acquired at different survey times, respectively, over at least partially overlapping areas, make the processor:
- to perform simultaneous geostatistical inversion of the at least two datasets to obtain realizations of parameters that characterize one or more underground structures, the one or more underground structures being repeatedly surveyed when acquiring the at least two seismic datasets, and the realizations being compatible with the at least two acquired seismic datasets;
- and
- to estimate evolution of the parameters in the one or more underground structures using the realization, the evolution being then used as a basis for hydrocarbon production-related decisions.
Dependencies are inferred from the claim text.