Wells – Processes – With indicating – testing – measuring or locating
Patent
1981-02-27
1983-02-08
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
73155, 166308, E21B 4706, E21B 4326
Patent
active
043723802
ABSTRACT:
A method of determining the minimum in-situ stress of an underground formation penetrated by a well. The method includes injecting a fluid at a certain rate into the formation to produce fractures in the formation, backflowing the injected fluid from the well at a rate less than the injection rate, and measuring the well fluid pressure decrease during the backflow to establish the pressure at which the fractures close.
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Felsenthal, "Step Rate Tests Determine Safe Injection Pressures in Floods", The Oil and Gas Journal, Oct. 28, 1974.
Earlougher, Jr., "Advances in Well Test Analysis," Marathon Oil Company, 1977.
Nolte Kenneth G.
Smith Michael B.
Brown Scott H.
Hook Fred E.
Novosad Stephen J.
Standard Oil Company (Indiana)
Suchfield George A.
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