isochronal test

[ī′sä·krən·əl ′test]

(petroleum engineering)

Short-time back-pressure test for low-permeability reservoirs that otherwise require excessively long times for pressure stabilization when wells are shut in.

References in periodicals archive ?

A 4-Point Isochronal test achieved stabilized flow rates of approximately 14 million cubic feet per day (~2,333 BOE per day) on a 48/64” choke, with associated condensate production increasing during testing.

TAG's Cheal-C1, Cheal-C2 and Cheal-A8 Flow Testing Confirm Significant Oil and Gas Discoveries

The Manamo-1X well reached a maximum gas flow rate of 4.9 MMcf/d and 296 bbl/d 54AAPI condensate through a 16/64 choke in a three-stage isochronal test, and an average rate of 2.8 MMcf/d gas and 160 bbl/d condensate through a 12/64 choke at 3,720 psi well head pressure, on an extended flow test.

Canada : Pacific Rubiales Announces Natural Gas And Condensate Discovery In The Guama Exploration Block, Colombia

A 4-Point Isochronal test achieved stabilized flow rates of 6.98 million cubic feet per day (~1163 BOE per day) with a 25% drawdown.

Strong Flow Test Results for TAG Oil's Sidewinder-4 Well, Sidewinder-2 Flow Testing Underway

A 4-Point Isochronal test on the Sidewinder-3 discovery well achieved a stabilized flow rate of 7.2 million cubic feet per day (1200 BOE per day) with less than a 50% drawdown.

TAG Reports Strong Flow Test at Sidewinder-3 Discovery, and On-Track to Produce First Commercial Oil and Gas from Sidewinder Discoveries

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