RE: wait until testing is completed24 Feb 2021 10:22
thanks - telemachus1
Pantheon Alaska Talitha Well testing programme currently underway - I will stick with the voice of experience in his post
on ADVFN board earlier this month...
Give credit to Pantheon for getting us to the position where we can be blasé about several hundred feet of pay logged as being worth testing..
After completing logging and coring, the process is to run a casing and cementing it to isolate the formations. Wait for it to set and pressure test. Then clean that out and run in with tubing and a packer (perhaps guns on the end of the tubing and perforating underbalanced or running wireline guns through the tubing to perforate overbalanced) we would probably be a week to get to the start of testing.
A typical program would involve a cleanup period, a shut-in to let everything settle down and then a flow of 12-24 hours at a rate that is stable. For gas wells, you typically test at several different choke sizes and rates to build a picture of the flow potential. For an oil well, the test can be simpler. However, you would then build-up for 24-48 hours to get information at distance from the wellbore.
These days, with real-time surface data from down the hole, you can customize the test as you go along to extract maximum info.
After the test, you suspend the zone (probably kill with a clear fluid of the right density, pull the tubing, run a cementing string and squeeze cement into the perforations. Let that set and then set a plug and move up to the next zone where you repeat the whole process. Perhaps a week per test is a good budget to allow for the expected unexpected?
That is why I would expect the Kuparuk test complete by end of the month and then a week for each of the next intervals so testing is done by the third week of March which should leave time to drill a short lateral and flow test for a few days to establish reservoir continuity in the deltaic sediments.
All of the above is a conservative timeline. They may achieve quicker turnarounds...
Posted by telemachus1
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