Live well deployment of long perforating gun
system using combined CT technologies
SPE ICoTA European Well Intervention Conference
Aberdeen - 12 November, 2014
Simon Smith, Technical Support Manager
Baker Hughes, Azerbaijan
High Level Case Study
▪ Major operator – Caspian sea
▪ Live well deploying guns not new
– Identify key successes & best practices
project planning…
to job execution
Challenge
▪ Quick oil - perforate new reservoir
– 1,007 ft of 3 3/8” guns
– perf 5 ½” tbg and 7 5/8” tbg
– highly deviated well
▪ Perforated w e-line tractor historically
– 16 runs required
– sand problem for tractor?
▪ Single run solution
– reduce HSE exposure
▪ one well entry / exit
▪ elec + hyd firing system
– reduce rig time
What’s New? - Proprietary Connectors, Firing Head & Intelligent CT
▪ Simple, Robust Connectors
– extensive debris testing
– set down motion only to engage
– compatible with universally available quad BOP
▪ New generation intelligent CT used
– better disconnect contingency
– improved safety
▪ hydraulic redundant firing option
– first time combination of firing head with intelligent CT
Job Planning
▪ “Quick incremental oil” – aggressive time frame
– planning team in place
▪ Manufacturing of connectors & BOP rams reqd
▪ Extensive tubing force analysis
– long BHA through multiple dog-legs
– firing loads on CT
▪ Extensive rig-up geometry checks
▪ Educate/train local team
– custom training course
– work through job check sheets -20000
-15000
-10000
-5000
0
5000
10000
15000
0 500 1000 1500 2000 2500 3000 3500 4000 4500
Expected Weight Gauge and Operating Limits During RIH - 2.0" CT 37832Base Oil in Well & CT, Air in 300 m of 3.375" Guns, 0.24 FC, 1500 lbsF Stripper Drag
We
ight
Gaug
e R
ea
din
g [lb
f]
BHA Depth [m]
Weight Gauge Friction Lock Limit Actual Weight Gauge Failure Limit
Project Title: 2" CT Gun Deployment
Field-Well: Chirag A-09 Z
Company-Client: BP Azerbaijan
File: \\bjsazb02\Engineering\Coiled Tubing\Deployment System - Snapshot\CIRCA\A-09z CT Perf.c32
Analysis: Monday, November 26, 2012 4:55:21 PM
Scenario: Simon Perf Guns TFA RIH on 2.0" CT 37832
Job Planning
▪ PCE Selection
– two x PCE stacks considered
▪ Contingency retrieve BHA’s
– if not possible to latch connector
▪ Choice of gun charges
– extensive CT end force modelling
– high force / low debris
▪ Well condition when fire
– allow immediate flowback
– mitigate sand influx
▪ static ov.balance
▪ dynamic un.balance
Lower Deployment Stack
Skid Deck
Wellbay
Koomey Unit 1
Koomey Unit 2
Koomey Unit 3
7 1/16” Shear Seal BOP
4 1/16” Deployment BOP
4 1/16” Hyd Gate Valve
4 1/16” Flow Cross
4 1/16” Gate Valve
4 1/16” Annular BOP
Shear Seal Ram Disconnect Ram
Locate Ram Slip Ram
Pre-Job Yard Testing
▪ Function test connectors (pair them)
▪ Pull test connectors
▪ Pressure test connectors
▪ Slip rams – hold weight of guns
▪ Elec comms check to firing head
▪ Fish tools catch connectors
▪ Elevators fit connectors
▪ Koomey units function test
Koomey Unit Yard Test
▪ Variable closing force to locate ram
▪ Variable closing force to disconnect ram
▪ Max closing force to slip ram
▪ Regulated closing force to annular BOP
Well Control
▪ Check at different stages of operation
▪ Barriers - dead well deploy guns
– Bridge plug / liner hanger packer
– KW brine
– SS BOP cannot be closed
▪ Barriers - live well retrieve guns
– Stripper / BHA check’s
– Gate valves (during break out tools)
– CT BOP
– SS BOP cannot be closed when guns at surface
Drills Carried Out Pre-RIH
▪ Cannot close SS BOP on guns
– how to secure well during gun deployment?
▪ Emergency procedures before RIH:
1. rig to place guns at deploy BOP in emergency
2. drop guns in well
Job Execution
▪ All guns fired electrically first attempt
▪ No over-pull post firing
▪ All gun connectors performed as expected
▪ BHA gauges confirmed model pressures
▪ Zero HSE incidents
▪ Very close to zero NPT
▪ Just over two days to retrieve all guns
▪ Four days rig time saved vs e-line tractor
Conclusions
▪ Combination of technologies simple to use and reliable
▪ First time combination of firing head + intelligent CT
▪ Early identification of planning team - essential to delivery
▪ Deployment check sheets - essential to execution
Lessons Learned ▪ Further time savings possible
– remove more drill pipe from derrick
▪ Add additional swivel below centralizer in retrieve BHA
▪ Annular BOP optional
▪ Make up connector on every gun
▪ Add flow cross between deploy BOP and lower GV
Thank you – Questions?
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