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DAS method of estimating fluid distribution

  • US 10,465,501 B2
  • Filed: 03/08/2017
  • Issued: 11/05/2019
  • Est. Priority Date: 03/09/2016
  • Status: Active Grant
First Claim
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1. A method of optimizing fracturing in a well, the method comprising:

  • a) recording distributed acoustic sensing (DAS) noise intensity signals from a well during a fracturing operation;

    b) deriving DAS intensity traces from the recorded DAS noise intensity signals, wherein each said DAS intensity trace is a recording of DAS noise intensity over a span of a pre-determined number of fiber depths averaged over a predetermined period of time, and wherein each said trace does not overlap with other said traces;

    c) locating a baseline channel having no perforations;

    d) calculating a volumetric flow rate Q for each said perforation cluster using the following equation;

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