Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
2011-08-02
2011-08-02
Kundu, Sujoy K (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
C702S007000, C702S011000, C324S323000, C324S334000, C324S339000, C367S029000, C367S049000
Reexamination Certificate
active
07991553
ABSTRACT:
Characterizing a reservoir with electromagnetic imaging surveys includes normalizing measured voltage data by transmitter moment, sorting the normalized voltage data into common receiver profiles, densely resampling transmitter locations using common positions for the receiver profiles, coarsely resampling the data at discreet transmitter locations, defining a starting model for inversion, weighting the data by a factor, converting the normalized voltage data to ratios, calculating a conductivity image using a ratio inversion method, and verifying that an inversion has converged and the image is geologically reasonable. The image can then be displayed. The invention can be used for cross-well, surface-to-borehole, borehole-to-surface, and single-well (borehole-to-borehole) measurements measurements by which the effects of steel casing are reduced.
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Abubakar Aria
Alumbaugh David
Habashy Tarek
Morrison Frank
Nichols Edward
Flores Jonna
Fonseca Darla
Kundu Sujoy K
Schlumberger Technology Corporation
Sethna Shaun
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