Joint inversion of time domain controlled source electromagnetic (TD-CSEM) data and further data
AssigneeWesternGeco L.L.C.
InventorsAndrea Lovatini, Michael D. Watts, Diego Rovetta, Giancarlo Bernasconi, Paolo Mazzucchelli
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Abstract
To perform inversion based on electromagnetic (EM) data acquired in a subterranean survey, time domain controlled source EM (TD-CSEM) data is acquired by at least one EM receiver in response to EM signals from a controlled EM source. Further data is received, where the further data is selected from among magnetotelluric (MT) data and DC data acquired by the at least one receiver. A probabilistic joint inversion is applied on the TD-CSEM data and the further data to produce a model representing a subterranean structure that is a target of the subterranean survey.
Claims19
A method of performing inversion based on electromagnetic (EM) data acquired in a subterranean survey, comprising:
- receiving time domain controlled source EM (TD-CSEM) data acquired by at least one EM receiver in response to EM signals from a controlled EM source;
- receiving further data including at least one member selected from the group consisting of magnetotelluric (MT) data and DC data;
- and
- applying probabilistic joint inversion on the TD-CSEM data and the further data to produce a model representing a subterranean structure that is a target of the subterranean survey, wherein applying the probabilistic joint inversion uses probability information that represents uncertainty of at least one member selected from the group consisting of observed data and model parameters.
An article comprising at least one non-transitory storage medium containing instructions that, when executed, cause a computer to:
- receive time domain controlled source electromagnetic (TD-CSEM) data acquired by at least one EM receiver in response to EM signals from a controlled EM source;
- receive further data including at least one member selected from the group consisting of magnetotelluric (MT) data and DC data;
- and
- apply probabilistic joint inversion on the TD-CSEM data and the further data to produce a model representing a subterranean structure that is a target of a subterranean survey, wherein the probabilistic joint inversion uses a first probability density that represents uncertainties associated with observed data including at least the TD-CSEM data.
A computer comprising:
- a processor;
- and
- processing software executable on the processor to:
- receive electromagnetic (EM) data acquired by at least one EM receiver in response to EM signals from a controlled EM source;
- receive further data including at least one member selected from the group consisting of magnetotelluric (MT) data and DC data;
- and
- apply probabilistic joint inversion on the TD-CSEM data and the further data to produce a model representing a subterranean structure that is a target of a subterranean survey, wherein applying the probabilistic joint inversion uses probability information that represents uncertainty of at least one member selected from the group consisting of observed data and model parameters.
Dependencies are inferred from the claim text.