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Wireline logging under PMCD (Pressurized Mud Cap Drilling) c 
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Joined: Tue Apr 05, 2011 8:38 am
Posts: 80
Post Wireline logging under PMCD (Pressurized Mud Cap Drilling) c
Does anyone have any experience in running wireline logs in wells drilled using PMCD (Pressurized Mud Cap Drilling) technique? Our company has drilled several wells dusing PMCD technique. Although we have full LWD logs in these wells, we have yet to carry out wireline logging in them. I would like to know the safety concerns and the effects of PMCD on wireline logs, as we are planning to run some wireline logs in the new wells to be drilled using PMCD mode.


Fri Jun 14, 2013 3:33 am

Joined: Fri May 17, 2013 9:49 pm
Posts: 4
Post Re: Wireline logging under PMCD (Pressurized Mud Cap Drillin
I don't have any experience with this, but a search was able to bring up a SPE paper dealing with the safety concerns associated with logging this type of operation.

Reference is:

"Drillpipe Conveyed Logging Provides Solutions for Pressurized Mud Cap Drilling Operations"
Julmar Shaun S. Toralde, SPE, Kevin M. Fisher, David J. Collecott and John C. Stewart / Weatherford
Document ID 132116-MS

From the abstract:
This paper presents the answer to the challenge of logging safely, efficiently and successfully in PMCD mode by utilizing a commercially proven compact drillpipe-conveyed logging system known as the well shuttle, in conjunction with a downhole isolation valve (DIV) and the RCD. It provides the set-up of the proposed system and discusses its capabilities and limitations. The advantages and disadvantages of the system, as well as how it compares to wireline logging methods in PMCD operations, are also discussed.


Fri Jun 14, 2013 4:54 pm

Joined: Tue Apr 05, 2011 8:38 am
Posts: 80
Post Re: Wireline logging under PMCD (Pressurized Mud Cap Drillin
Thank you for your reply.
Yes, I am aware of this Well Shuttle logging system from Weatherford.
We wanted to use it in our recent well drilled under PMCD, but the bottom hole temperature exceeded the rating of the tools and therefore could not be implemented.
We have been logging our PMCD wells using LWD, but due to enlarged hole problems, the logs acquired were not reliable.
I was hoping that we may be able to do wireline logging in future wells drilled with PMCD, using a Wellhead Pressure Control system on the wireline logging tools.


Sat Jun 15, 2013 1:12 am

Joined: Thu Jul 26, 2012 10:04 am
Posts: 7
Post Re: Wireline logging under PMCD (Pressurized Mud Cap Drillin
Hi Kokoyi,
can you give me a sequence to evaluate a "Thin, Laminated Sand-Shale Sequences" and also if you can relate it to "low resistivity pay". Thank you


Mon Jan 25, 2016 10:59 am
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