Analyzing a hydrocarbon reservoir by determining the response of

Details Analyzing a hydrocarbon reservoir by determining the response of Analyzing a hydrocarbon reservoir by determining the response of

1989-06-29

1991-08-20

Williams, Hezron E.

Measuring and testing

Borehole or drilling

Downhole test

73152, 73382R, G01V 900

Patent

active

050404148

ABSTRACT:
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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