Objective:
To abandon the well in a safe manner permitting the removal and restoration of the location.
Workover number: xxx
Min. required hoist capacity: T 93
Estimated time : 2.5 days Estimated start date :
Account code :
Well history:
The well was drilled in xxx and was completed as an oil well. An Outside Liner repair was carried out in xxx. The well was closed in due to high water-cut in xxx. In xxx, the well was suspended with gravel, cement and a killstring.
Programme Outline: Hours
Move & rig up 12
PooH killstring Assy. 6
Cut/Retrieve 7" csg below 9 5/8" shoe. 20
Set cmt. plug to surface. 6
Install blind plate. Relaease well. 6
-- Total time 50
Estimated time including 15 % cont. (days) 2.5
Current well status :
Suspended with NACL 1.19 Brine, gravel pill, 53m cement plug & killstring.
Milieu restrictions :
Neighbouring wells: none
Wells to be closed in: none
Operating time : 24 hrs/day
Producing well data :
|Reservoir |Depth, |Pressure,|Gradient,|H2S, |CO2 |
Well production prior to workover :none
Well potential after workover :none
Fluid in well : NACL Brine S.D. : 1.19
Workover fluid : NACL Brine S.D. : 1.19
Mechanical well data:
Depth reference : 7 1/16" CA TBF
Elevation of ORT : 19.97 m, NAP
Elevation of reference : 17.67 m, NAP
Distance ORT TBF : 2.30 m
Elevation of top of cellar: m, NAP
Distance cellar - TBF : m
Concession:
Coordinates : X Y
Wellhead description:
SANTA FE Flange 9 5/8" x 7"
CA 7" STC x 7 1/16" 2K
BWS 7 1/16" x 7 1/16" 3K flange.
Adapter flange 7 1/16" 3K x 4 1/16" 3K.
BW Hanger 7" NOM 3 1/2" EU BOX
Casing scheme:
|Size |Weight|Grade|Coupling|From |To |TOC |
HUD: 751.0m - top of cement plug
Kickoff depth : -
Maximum deviation : 2.48 degrees at 706.4 m
Maximum dogleg : 0.94 deg/10m at 670.8 m
Current completion description:
Hanger: Boll Weevill 7" NOM 4 1/2" EU BOX.
X-over: 4 1/2" EU x 3 1/2" EU
Killstring tubing: 3 1/2" 9.3# EU to 612.3
X-over: 2 3/8" EU x 3 1/2" EU
Killstring tubing: 2 3/8" 4.7# EU to 698.7
Comp. liner: 4 1/2" slotted (0.45 * 50 * 260) openings
slotted 840.5 to 874.9 m
Brown model 'D' Hanger/Packer @ 809.8
General Notes
1. This is a H2S locations. Full H2S precautions to be taken including; H2S caravan to be on site, continuous pH monitoring and gas detection in the flow line, no body to stand on the tanks whilst circulating.
2. All pressure tests to be for a minimum duration of 15 minutes.
3. Components listed in order of RIH.
4. All depths related to TBF unless stated otherwise.
5. Check well killing report for suitability of workover fluid.
Programme :
1. Check tubing and production casing pressures, and pressure of all casing/casing annuli. Bleed off pressures. Report pressures in WOR even if zero.
2. Reverse circulate well to workover fluid.
3. Instal H-plug in BW hanger and test to 200 bar.
4. Remove wellhead.
5. Pull H-plug
6. Pick up string, remove BW Hanger. POOH killstring.
12. Cut 7" casing 50m below the 9 5/8" shoe at +/-151m. Assembly for cutting 7" casing as per Red Baron instructions. Circulate 7" x 9 5/8" annulus. Dump returns into separate pit. Check if 7" casing is free by lifting wellhead.
13. Lift flange. Cut casing below flange. N/U adapter spool. Fish 7" casing stub.
14. Retrieve 7" casing. Red Baron casing cutting tool to be used instead of breaking connections.
15. RIH 2 3/8" Cmt stinger to 154m and set cement plug to surface. Pump (50m open hole) water spacer ahead. Pump cement until good cement returns seen at surface.
16. POOH and clean out wellhead. If necessary perform top fill cementation to 3m below TBF.
17. Install 10" blind plate.
18. Release well.