Accurate dynamic gravity measurement method and apparatus

Data processing: measuring – calibrating – or testing – Calibration or correction system

Reexamination Certificate

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Reexamination Certificate

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07406390

ABSTRACT:
Gravity information for a gravity survey is obtained by using an array of relative gravimeters whose relative gravity measurement signals have been calibrated by using an absolute gravimeter to approximate absolute gravity measurements. The absolute gravimeter is moved periodically to the location of each relative gravimeter to measure absolute gravity. The absolute and relative gravity measurements for each relative gravimeter form an error signal which is used to calibrate each relative gravimeter.

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J.M. Brown et al.,Preliminary Absolute Gravity Servey Results from Water Injection Monitoring Program at Prudhoe Bay, SEG Int'l Exposition and 72 Annual Meeting, Oct. 6-11, 2002, 3 pages.
Ola Eiken et al.,Gravimetric Monitoring of Gas Production from the Troll Field, SEG Int'l Exposition and 74thAnnual Meeting, Oct. 2004, 4 pages.

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