WISE-CASING: DC Simulation at Containment and Monitoring Institute (CaMI), Calgary, Canada field_data_obs2_excited_5hz.txt

For the model calculation we applied EM3D using completion diagram of CaMI site and a background resistivity consistent with the borehole logs. It was also important to use the accurate position of the return electrode. We note that for the data fit the code also incorporated well casings for well INJ and the other observation well, either OB1 or OB2, in the calculation.

In summary, we demonstrate here, for this particular case, that the DC results may be a reasonable approximation to the low frequency EM data collected at CaMI. If this approximation continues to hold, then the extreme computational efficiency offered by the hierarchical modeling used in the DC simulations will permit us to explore far more model complexity, especially the pervasive and troublesome data artifacts that arise when doing EM surveys in mature, culturally developed sites.

In Brief, both the low frequency and DC simulation codes provided very consistent results that match the field data really well, indicating their capability to help monitoring borehole integrity with the low frequency EM method. Field low frequency EM data for excitation of Observation Well 2 using a 5 Hz source frequency. Data is provided as distance form wellhead (m), Ex field amplitude (V/m), and Ex phase (degrees)..

Data and Resources

Metadata Source

Additional Info

Field Value
Citation Date 2019-04-30T00:00:00-06:00

Harvest Information

Original ID f0000003-58cc-4372-a567-000000001171
Index Date 2019-11-07T11:54:46-07:00
Original Format ISO-USGIN
Original Version 1.2

Author

Name Jiannan Wang
Position primary contact
Organization Lawrence Berkeley National Laboratory
Email JiannanWang@lbl.gov

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North Bound 51.271714233863
South Bound 50.036152670671
East Bound -112.46563320312
West Bound -114.31123515625