Comments

  1. daoui abdelmalek
    January 17, 2012

    I’m looking for addresses of companies specializing in welltesting.
    At times I need to answer the questions in welltesting.
    Best regards

    • david
      February 1, 2012

      I am certainly able to answer a variety of questions. There are several excellent resources available through LinkedIn Groups: The Welltest Group, Welltest Services, Reservoir Engineer Consultants, Global Subsurface Professionals, and the Reservoir Engineer Network. The Society of Professional Engineers (SPE) has a LinkedIn Group, but also has the Well Testing Technical Interest Group (TIG) – Well Testing Discussion Forum available to SPE members.

  2. Michael Beck
    January 31, 2012

    Hi Dave!!!

    Congrats on the new site. I haven’t been poking around for a while as i thought you were venturing into the photography business. Looking at you r webpage it seems you are very active in the biz.

    I am particularly interested in DFIT testing. Its a huge part of my business now and i would be very interested in forwarding you r analysis on as part of my data package lets talk again soon.

    • david
      February 1, 2012

      Mike – not quitting the day job yet – but am semi-retired due to lack of work! Nevertheless, it’s 2012 and the Calgary Stampede celebrates it’s 100th birthday. Since my great-grandfather was the official photographer for the first Calgary Stampede in 1912 I thought there could be an opportunity for me to get my cameras out. The City of Calgary is also the 2012 Culture Capital of Canada, which could provide even more photo ops. Anyway, feel free to download and share the DFIT sample on the web site.

  3. Danzhu Zheng
    November 4, 2015

    Hi, Sir. I am a student from University of Tulsa. I am interested in DFIT.
    Could you recommend me some fundamental journals or books on that?
    Thank you so much!

    I am replying a second time, because I typed a wrong email address the first time.
    Please email me if you could.

    • David Leech
      November 21, 2017

      1) Hydraulic Fracturing Theory & Practice, R.D. Barree, Barree & Associates LLC. – download off their web site.
      2) A Primer on the Geomechanics Behind Fracturing Pressure Curves, Mehrdad Soltanzadeh, PetroGem Inc.

  4. Adel Hammouda
    August 30, 2019

    Hi,

    I work with PDO in Oman. I wonder if the AWS can measure P* in our deep gas condensate wells. The depth can reach more than 5000 meters. How long shut-in period is required knowing that it is a tight gas formation of 0.01 to 0.1 md.

    Thanks,
    Adel Hammouda

    • David Leech
      September 8, 2019

      Howdy Adel, I’d recommend a few trials to calibrate bottom hole pressure calculations and friction effects – i.e. run concurrent subsurface and AWS (surface) tests a couple of times to see if they corroborate. Tight gas might take several weeks to achieve middle-time radial flow, analogous well tests would help with scheduling. Or consider Rate Time Analysis (RTA) on the long-term production data – which is best if you have surface pressure data. Later, David.

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