Salt well TR-7 workover
Start Engineering: November 2018
End execution: November 2020
Objective: Re-complete well
Depth (MD): 1726m
Depth (TVD): 1480m
Project Summary
Client: | Nedmag BV |
Location: | WHC-2 / Tripscompagnie |
Wells: | TR-7 |
Start Engineering: | November 2018 |
End Execution: | November 2020 |
Objective: | Re-complete well |
Depths (MD): | 1726m |
Depths (TVD): | 1480m |
Role of WEP: | Engineering and planning support on program and HSE documents. Operational support onsite and back-office |
Challenges: | Removal of a dual completion without identification of the complete status of the well. Plan was to recomplete the well with a dual completion, in snubbing mode, however during the drift run it was found that the well could not be re-completed. |
New technology: | Use of an floating mud cap, inverted fluid column (high weight mud on brine), to remove WH items. |
Project Description
The initial objective of this workover was to recomplete the well as a simultaneous injection and production well. This would be achieved by retrieving the current dual completion strings, drilling in a new 4-½” x 3-½” production string and a 2-⅞” gypsum injection string in a dual completion configuration.
Due to unforeseen circumstances regarding the condition of the 9 ⅝”, the objective of recompleting the well could not be achieved.
TR-7 was drilled in 1991 and completed with a dual completion, 2x 3 ½” tubing inside a 9 5/8” casing. The snubbing operation was performed in July 2020 and lasted for 39days. The removal of the 3 ½” dual completion went as per plan. However on the mill run, to mill out the remaining tubings in the bottom of the casing an obstruction for the 8 ½”mill above the tubings was found inside the casing. After wireline evaluations the operations were suspended to evaluate the future use of the well.