March 13, 2018 at 7:24 pm #16599
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
March 25, 2018 at 11:19 pm #16712
Francoise NSEYA WA KASESAParticipant
How to solve the problem of turbidity of the water of the well, which is manifested after a rest period?
March 26, 2018 at 8:55 pm #16752
Dr. Charles SereleParticipant
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.
March 30, 2018 at 1:48 pm #16803
From my experience, when a borehole is flushed, the water becomes colorless , meaning that flushing reduced the turbidity
April 3, 2018 at 10:59 am #16840
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.
April 3, 2018 at 7:14 am #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
April 3, 2018 at 5:20 pm #16847
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?
April 14, 2018 at 11:49 am #16928
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?
You must be logged in to reply to this topic.