Wireline Express conveyance system improves operational efficiency in a 69° deviated offshore well in Mexico
In an offshore well in Mexico, the logging program included 6 runs. The maximum well deviation was 69° and included a 1000-meter-long tangential section. In order to avoid piped conveyed logging, which included two latches per descent, significantly longer operating time, and multiple associated risks, the operator decided to convey the logging tools with Petromac’s conveyance system – Wireline Express.
A total of 7 runs were conveyed on wireline – by gravity – and in each occasion the maximum deviation and total depth were successfully achieved due to significantly reducing the tool drag.
This job included a world first conveyance for MRIL-XL and Geochain. Tool Taxis permitted the multilevel seismic tool to be run with 4 shuttles rather than 1 shuttle with PCL resulting in additional rig time savings.
By using Wireline Express the operator obtained an exceptional logging dataset while saving 1.25MM$.
Petromac wheels orient the probe to the high side resulting in higher pretest success rate and improved permeabilities.
An operator in Mexico initially planned to log a 69° well using Pipe Conveyance (PCL). They were concerned with the rig time required with PCL and the associated risks with multi-latch operations and tripping in-hole blind.
The wireline company proposed Petromac Tool Taxis on each toolstring in order to minimize drag and reach TD by gravity descent.
The operator was able to save 8 days of rig time, while controlling operational risks such as differential sticking. Additionally, enhanced data was acquired thanks to smooth tool motion while logging up.
Holefinder system facilitates wireline logging in an ‘impossible well’ in Iraq
Near Vertical ‘Impossible Well’ Logged in Iraq
An operator in Iraq was combating major issues with wellbore ledges in a well with only 6 deg deviation. After two wireline runs which were held up at shallow depth, the operator undertook a wiper trip, only to experience similar problems again on the 3rd attempt. The decision was made to run a TLC operation, however this was also unsuccessful.
In all a total of 5 days of rig time had been lost trying to pass a 20” washout with associated ledge.
Frustrated with the lack of results from conventional wireline and TLC, the operator sought the expertise of Petromac to log this critical well. A total of 6 descents were made with Petromac Wireline Express – all seamlessly conveyed to TD.
Without a holefinder, wireline toolstrings are easily held up by ledges and washouts.
Using the Wireline Express holefinder, the toolstring does not loose any momentum as it slides over wellbore obstructions.
In ‘vertical’ wellbores large ledges will persistently holdup toolstrings, even on TLC operations.
Petromac Tool Taxis ensure that the angled holefinder is always oriented upwards, allowing the toolstring to slide seamlessly over ledges.
A well which could not be logged on TLC was subsequently logged using the Petromac holefinder system (6 successful runs in hole).