E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
73/132, 166/3, 1
E21B 49/00 (2006.01) E21B 33/124 (2006.01) E21B 47/06 (2012.01) E21B 47/10 (2012.01) E21B 49/08 (2006.01)
Patent
CA 2034444
A method and apparatus for measuring fluid flow rates, and the absolute open flow (AOF) potential of a subterranean formation penetrated by a wellbore. The present invention can be described as a formation fluid flow rate test tool which is conveyed and operated on a wireline logging cable. The down hole test tool comprises an arrangement of inflatable packers to isolate an interval and a pump which extracts fluid from the formation through an inlet below the upper most packer. The method allows for sequentially increasing or decreasing the pump rate and hence flow rates and measuring the corresponding pressures. From this data, the reservoir flow characteristics, properties and deliverability can be accurately calculated, which was not previously permitted with other known wireline conveyed sampling and testing tools. Additionally, the present invention allows for the reservoir parameters to be obtained under dynamic conditions, emulating an AOF test which was previously only obtained after completion of the well. This method and apparatus presents an economical and time effective technique with which to enter into a decision regarding the disposition of a wellbore.
Goodwin Mckay
Weatherford Canada Partnership
LandOfFree
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