Analyzing a hydrocarbon reservoir by determining the...

Details Analyzing a hydrocarbon reservoir by determining the... Analyzing a hydrocarbon reservoir by determining the...

E - Fixed Constructions

21

B

166/1, 23/44

E21B 43/00 (2006.01) E21B 47/00 (2006.01) E21B 49/00 (2006.01) G01V 7/00 (2006.01)

Patent

CA 1320123

ABSTRACT OF THE DISCLOSURE A method is disclosed for determining a component of the response of a reservoir to tidal forces (such as the amplitude of variation or delay time) in a hydrocarbons reservoir. That method comprises measuring a variable responsive to tidal forces within the reservoir over a measurement time period, determining a theoretical earth- tide for the reservoir over that measurement time period, and determining the component of the response to tidal forces by comparing the variable measurements and the theoretical earth-tide determinations. Examples of variables that are responsive to the tidal forces are fluid level in a borehole, pressure, and borehole stress. The measurement time period should be sufficiently long so that both a maximum and minimum variable measurement is achieved during that time period (e.g., fourteen or twenty-four hours).

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