Equi-pressure geosteering

Details Equi-pressure geosteering Equi-pressure geosteering

E - Fixed Constructions

21

B

E21B 7/06 (2006.01) E21B 7/08 (2006.01) E21B 47/04 (2006.01) E21B 47/06 (2006.01) E21B 47/12 (2006.01)

Patent

CA 2329673

A method for determining a desirable depth for drilling a horizontal well within an oil reservoir includes the steps of deploying a plurality of data sensors at discrete depths in a subsurface formation penetrated by a wellbore, gathering formation pressure data for the discrete depths using the data sensors, and determining the depth of a reservoir using the gathered formation pressure data. The depth within the reservoir may be determined by identifying from the gathered formation pressure data at least one depth whose corresponding formation pressure is suggestive of a reservoir. Once such a depth is identified, the wellbore itself or a lateral drainhole depending from the wellbore may be steered into the reservoir by maintaining the trajectory of the wellbore or drainhole at a substantially constant distance from a fluid contact within the reservoir.

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