Home Forums WWD20: Module 3 Questions & Answers

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This topic contains 8 replies, has 8 voices, and was last updated by  Ayman 7 months, 1 week ago.

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  • #16599
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    Damian Indij
    Keymaster

    Dear all, I invite you to use this forum to post your questions referred to the module assignment, or to any of the readings. This way all participants will benefit from your questions and from the answers given by the facilitators, and why not, by participants too (you all have plenty to share). You may also use this space to share any interesting announcements, publications, events, etc. Thanks, Damian

  • #16712

    How to solve the problem of turbidity of the water of the well, which is manifested after a rest period?

    • #16752
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      Dr. Charles Serele
      Participant

      Dear Francoise,
      How long is the rest period? In which type of geological material the borehole is sited? Can you tell more. Turbidity issue usually occur when a borehole is not well-developed, but it can be related to the type of geological formation as well.

      Charles

  • #16803
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    jndayizeye
    Participant

    From my experience, when a borehole is flushed, the water becomes colorless , meaning that flushing reduced the turbidity

    • #16840
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      Kerstin Danert
      Participant

      Jackson – yes, this is the process of borehole development. A borehole needs to be developed (by flushing with air usually) in order for all of the fine materials that are in the formation next to the screen to be flushed out. If this is not done, the borehole risks silting up, as you see in the drilling video. This can happen quickly, or over months and even years. A borehole should be developed until the water is completely free of sediment. Making sure that this happens is also the job of the supervisor.

  • #16825

    Which country can share its experiences for drilling data collection with Smartphone? What are the challenges? This technology could accelerate data updates to the upstream, and helps the decision maker monitor borehole working

    • #16839
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      Kerstin Danert
      Participant

      Dear Nirina – I have come across this. The work was being undertaken at a pilot stage. I am trying to trace the email/references and will get back to you.

  • #16847
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    maminirina.washmada
    Participant

    In general, can you share the tools used to minimize the risk of corruption between the company and the design office during the drilling and ensure the quality of drilling?

  • #16928
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    Ayman
    Participant

    In some places, the water-bearing formation has very high thickness
    – first how can we define the depth of well exactly?
    – if we find that the well yield is not enough, can we extent the well depth or not? if not is there another solution?
    Thanks

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