Texaco Exploration Canada Ltd.

Texaco Inc.

George H Agnew

William B Braden

A method for measuring fluid advance in underground formations comprises, (1) driving bench marks into the ground over the formation spaced a predetermined distance apart, (2) measuring and recording the precise vertical displacement of each bench mark at the end of each predetermined period of time, and (3) interconnecting bench marks of similar vertical displacements to form lines, each line indicating the position of the passing of a particular amount of fluid in the formation underground at a particular time.

Method for monitoring underground fluid movement for improving recovery

A method for the recovery of hydrocarbons from a subterranean hydrocarbon-bearing reservoir by an enriched gas drive wherein lean gas, evolved from the miscible transition zone, is produced ahead of the miscible transition zone and reinjected behind the solvent injection point whereby excessive gas production is utilized and a drive agent miscible with the solvent is provided to displace the reservoir fluids through the reservoir to a production well from which they are produced.

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Calgary, Canada

George H Agnew