Light well intervention. -Experiences gained. FMC Production Services

Transcription

1 Light well intervention -Experiences gained FMC Production Services

2 Background FMC Smart Fields R & D with Statoil and Shell LWI was named as one of the fields of interest in Smart Field program from LWI JIP in Demo 2000 First Demo 2000 project was JIP for LWI JIP managed by FMC incl.: Maritime Well Service, Triangle, Vik-Sandvik, Maritas,DnV, Statoil and NPD(observator) 2

3 Light Well Intervention Market Potential (7 Days per Operation) Potential Wire-line Operations Norway,BP-Amoco(UK), Shell Expro Operating Days, / Days per Operation All UK are 5"*2" Trees Start Mid 2000,Years Operating Days51/8" Operating Days 7"10000psi BP (UK), Shell Expro ops days

4 The long path towards commercial operations: - Pilot with Regalia First operation from Regalia in 2003 after first one failed fjord test Lesson learned: Integration of stack to vessel, never a trivial task.. Intervened SSP, Åsgard and 3 rd party XT (Visund/Aker well) Concept proven.. 4

5 R for the North Sea In 2004 Island Offshore, Aker Solutions and FMC started the Northsea Alliance for LWI Secured long term contract with Statoil (6+3years) Secured 3 year contract with BP Upgraded stack from Regalia, for use on Island Frontier 5

6 The North Sea Alliance Operates 3 vessels: 2 with Statoil and 1 with BP West of Shetland Island Frontier Statoil Island Wellserver Statoil Island Constructor BP (West of Shetland) 6

7 Experience on different trees Xt Xt type Pressure Wireline operation FMC 5 Vertical 5000psi Pulling plug, horizontal well using tractor Kværner 7 Horizontal psi Repair DHSV FMC 7 Horizontal psi PLT Vetco 5 Vertical 5000psi Re-perf., PLT Plugging Cameron psi Replacing DHSV Vertical 7

8 Experience from first generation system Interuptions often due to umbilical size and handling issues 8

9 Improvement programme: RLWI Mark II Minimise umbilical handling requirements Simple ROV style electronic cable Hydraulic power generated on seabed Reduce weight and drag area in top of stack to increase operational window Improve interface to existing trees and control system Isolated XT interface unit for hydraulics to operate XT s Increase robustness against loss of tool string in the well: Fully redundant control system Independent A and B system Local battery power for autonomous control Simpler to trouble shoot and repair offshore Prepare system for deepwater operations 9

10 Mk1 and Mk2 Umbilical cross section Mk1 Electro-hydraulic Mk2 Controls and Chemical OD 38mm OD 116mm Initially OD 148mm OD 51mm 10

11 Redundant closed loop hydraulic system modular design Valve actuator Subsea Control Module w/dcv s Fluid Accumulator Bank Reservoar Well Control Package Recirculating fluid Hydraulic Power Unit 11

12 Subsea grease injection and storage Enabler for dynamic seal against well pressure while wireline tool is moving Precise flow and pressure control Subsea grease storage Pressure Control Head Grease Storage Grease Pumps Lubricator 12

13 Pressure rating: 690 bar Max. Toolstring length: 22m Min. ID: 179,324mm Upper stack: -ULP -LUB -Hub (Tool Trap) Lower stack: -LLP -LIP -XT Adapter PCH Seal Section Pressure rating: 690 bar Max. Toolstring length: 22m Min. ID: 179,324mm Lubricator Section: -ULP -LUB -LLP Lower stack: -WCP -XT Adapter -Min. ID: 179,324mm 13

14 The story so far: Number of well interventions since 2006: 70 Type of operations: Install plugs (for later rig work) - Install straddle inserts Perforation (and re-perforation) - Change out of DHSV and Gas lift valves Scale removal (milling) - Scale squeeze Production logging - Caliper runs Leak detection - Sand removal (limited volumes) Installation/retrieval of Xmas Trees on wire 14

15 International focus LWI is established as a safe and cost-efficient well intervention method in shallow water in the North Sea When average well age matures in other regions (5 year +), similar intervention demand will develop: West Africa Brazil GoM Far East All these areas will require deepwater systems 15

16 LWI Vessels/Systems Demand Shallow Water Deep Water Africa Asia Pacific Eastern Europe & FSU Latin America Middle East North America Norway Western Europe (ex. Norway) Africa Asia Pacific Eastern Europe & FSU Latin America North America Norway Western Europe (ex. Norway) Number of LWI systems estimated to increase to 12 in 2013 primarily for deepwater Africa and Brazil. Source: Douglas Westwood 16 Vessel Demand Vessel Demand

17 Deepwater wireline intervention Same base principle as shallow water can be applied Main challenges: Cable behavior in watercolumn (cable conveyance) Max. payload New opportunity, Composite Intervention cable: Demo 2000 project First prototyp field test oct.09 17

18 Deepwater Cable conveyance Deployment of toolstring During intervention (RIH) 18

19 Well Intervention Activities Capabilities 100% About 70% of intervention activities can be performed by RLWI using Slick Line, Braided Line or Composite Cable Coiled Tubing increases capabilities, although requires additional technologies, equipment and facilities 90% 80% 70% 60% 50% 40% Slick Line Braided Line Composite Cable Coil Tubing 30% (Chitwood, - OTC 8729) RLWI Wireline Production Logging Replacement of hardware Shifting sleeves Plug and perforating Plug and abandon Scale Squeeze Scale milling Sand removal (limited volumes) Coil Tubing (Needs riser ) Stimulation and circulation Tubing repair Extra long offset reach 3-1/2 Bit TTRD & Others Drilling Rig 19

20 Extended reach and load: Composite vs. Standard WL Reach with composite cable Reach with Standard Wire Line 20

21 Composite cable (6.850m) test in Groningen Field trials completed 2009: Cable runs to bottom of well Several tests of fishing, retermination,etc. Conclusion: Cable perform as expected, Prototype wireline conveyance equipment limited test scope 21

22 Through tubing rotary drilling (TTRD) Started as a variant of RLWI Developed Subsea Hang Off RAM Developed Surface BOP Riser Monitoring system In 2009 Statoil demonstrated, through 2 successful TTRD operations, intervention and drilling through same system 22

23 Conclusion LWI have been a challenging technology to mature Operator commitment, and alliance model for integrated operations key sucess factors Technology now in preparation for international deployment in new deepwater regions TTRD will be matured in Norwegian waters along same lines 23