Joint Time-Lapse Acquisition and Inversion of Passive Seismic and Magnetotelluric Data for Monitoring Reservoir Processes at the Geysers Geothermal Field

Summary

SCH Number
2020060539
Lead Agency
Energy Commission (California Energy Commission)
Document Title
Joint Time-Lapse Acquisition and Inversion of Passive Seismic and Magnetotelluric Data for Monitoring Reservoir Processes at the Geysers Geothermal Field
Document Type
NOE - Notice of Exemption
Received
Posted
6/24/2020
Project Applicant
Lawrence Berkeley National Laboratory

Document Description
This project will demonstrate the advantages of concurrently acquiring time-lapse magnetotelluric and passive seismic data over a producing geothermal reservoir. The data will be jointly inverted for images of resistivity and seismic velocities using workflows and algorithms that enforce structural similarity constraints between the different physical properties, and subsequently correlating the spatio-temporal information in the joint-inversion geophysical images to working reservoir models. The technical advancements of this project are provided via concurrent monitoring of time-lapse changes in both resistivity and seismic velocity and the joint inversion of the multi-physics data. Ultimately, these images can be used for better estimates of rock properties and spatial distribution of steam and water at depth, for more accurate reservoir modeling and monitoring which will lead to more accurate placement of production wells. A field demonstration at The Geysers will be carried out to evaluate the value added by applying this technology.

Contact Information
Chuck Gentry
California Energy Commission
1516 Ninth Street, MS 48
Sacramento, CA 95814

Phone : (916) 327-1528

Location

Cities
Middletown
Counties
Lake
Cross Streets
10350 Socrates Mine Rd

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15304 & 15306
Reasons for Exemption
This project is exempt under 15304 because it consists of passive data collection and does not involve any construction or changes to the existing landscape. This project is exempt under 15306 because it consists of data collection for the purposes of resource evaluation research which does not result in a disturbance to the environmental resource.

Attachments

Notice of Exemption
2020060539_Joint Time-Lapse Acquisition and Inversion   PDF 164 K

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