completion and workover
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DRILLING PRACTICESCOMPLETION AND WORKOVER
INTRODUCTION
IDEAL COMPLETION
LOWEST COST
MEETS DEMANDS PLACED ON IT DURING PRODUCTION LIFE
GENERALLY THE SIMPLER THE COMPLETION THE GREATER ITS RELIABILITY WELL WORKOVER MAY ALSO BE CONSIDERED PART OF COMPLETION DESIGN
WELL COMPLETION OPERATIONS WILL INCLUDE
SAND CONTROL
TUBING COMPLETION STRING / HANGER INSTALLATION
SUB-SURFACE SAFETY INSTALLATIONS (SSSV, SCSSV,TRSCSSV)
XMAS TREE INSTALLATION
PRODUCTION PACKER SETTING
PERFORATING
BASIC COMPLETION TYPESOPEN HOLE PRODUCTION CASING PRODUCTION LINER PRODUCTION GRAVEL PACKED PRODUCTION
No downhole flow control or isolation possible Unsupported producing formation
Producing zone(s) hydraulically isolated by casing cement More options for selective treatment and isolation
Similar to casing production but with savings associated with shorter casing string and smaller hole diameter through reservoir
Dictated by formation type, selectivity of treatment and subsequent isolation difficult
BASIC COMPLETION TYPESOPEN ENDED (SUSPENDED) TUBING PRODUCTION BASIC PACKER PRODUCTION PACKER WITH PERFORATED TAIL PIPE
PACKER WITH NIPPLES, SLIDING SLEEVE AND SAFETY VALVE Production safety valve
Downhole Isolation (plug) Downhole Instrumentation (gauges)
Well kill capability but no control of annular fluid level and possible exposure to corrosion
Well kill capability when packer is released
Downhole Isolation (plugs) above and below packer Circulate through sliding sleeve without packer release
Casing string protected from corrosion and production stresses by inhibited packer fluid
MULTIPLE ZONE
INTERVAL SEGREGATION
CONCENTRIC STRINGSMULTIPLE STRING TWIN STRING DUAL COMPLETION SINGLE STRING DUAL COMPLETION
NUMBER OF ZONES COMPLETED
SINGLE ZONE
INTERVAL CO-MINGLINGSTANDARD ELECTRIC SUBMERSIBLE PUMP PLUNGER LIFT GAS LIFT HYDRAULIC PUMP ROD
COMPLETION CONSIDERATIONS
MODE OF PRODUCTION
FLOWING (SINGLE STRING)
ARTIFICIAL LIFT
HIGH RATE LINER HIGH PRESSURE TEMPORARY,SIMPLE LOW COST TUBINGLESS
INTERFACE BETWEEN WELLBORE AND RESERVOIR
PERFORATED CASING
INTERNAL GRAVEL PACK
PERFORATED LINER
STANDARD
EXTERNAL GRAVEL PACK
UNCEMENTED LINER
RESIN INJECTION WIRE WRAPPED SCREEN
OPEN HOLE
SLOTTED PIPE
WORKOVERDEFINITION OF A WORKOVER
TO PERFORM ONE OR MORE OF A VARIETY OF REMEDIAL OPERATIONS ON A PRODUCING WELL TO TRY AND INCREASE PRODUCTION
WELL MAINTENANCE MINOR WORKOVERSWIRELINE & TFL OPERATIONSDRIFT RUN PARRAFIN CUTTING SAND BAILING INSTALL PLUG PRESSURE TESTING SSSV REPAIRS SLIDING SLEEVE FISHING ROUTINE WELL KILL THRU TUBING LOGS RE-PERFORATION CEMENTING KICK-OFF THRU-TUBING BRIDGE PLUG KICK-OFF NON-ROUTINE WELL KILL HYDRATE & SCALE CLEAN-OUT MINI-FRAC REMEDIAL THRU-TUBING GRAVEL PACK FISHING CEMENT PLUG ACIDIZING SAND CLEAN-OUT
PUMPING OPERATIONSCHEMICAL INJECTION
COIL TUBING OR SNUBBING OPSCHEMICAL INJECTION ACIDIZING
MAJOR WORKOVERS
REPAIRS
RECOMPLETIONS
REMEDIAL CEMENTING
UPHOLE
GRAVEL PACKING DEEPEN SSSV REPAIRS
CASING AND TUBING LEAK REPAIR
SIDETRACK
FISHING
NEW TUBING REPLACEMENT
CONVERT TO INJECTION
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