Measuring and testing – Gravitational determination
Patent
1977-10-19
1978-10-24
Gill, James J.
Measuring and testing
Gravitational determination
23230EP, 73151, 181 05, 340 155R, G01V 900
Patent
active
041214641
ABSTRACT:
To locate potentially hydrocarbon-bearing subsurface formations, tiltmeters measure the time of arrival and the apparent direction of a lunar-induced earth tide at an array of points on the earth's surface. The measurements are combined to determine the shape of the tidal wave in a region of interest. The shape is indicative of subsurface viscosity in the region. Subsurface formations having an abnormally low viscosity are considered potentially hydrocarbon bearing.
REFERENCES:
Travaux de l'Association de Geodesie - Report by W. D. Lambert, Sep. 1936, 28 pages, pp. 1-3.
Transactions of American Geophysical Union-Jun. 1956, vol. 37. No. 3, pp. 266-272, "An Improved Instrument for Measurement of Tidal Variations in Gravity" by Clarkson et al.
Brufsky Allen D.
Gill James J.
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