ALCS TM. ABEL LMRP Capping System Rev 6 29 Oct Subsea Intervention for Deepwater Blowout Incidents

Transcription

1 ALCS TM ABEL LMRP Capping System Rev 6 29 Oct 2013 Subsea Intervention for Deepwater Blowout Incidents

2 ALCS (Abel LMRP Capping System) Design philosophy: Keep it simple Quick to deploy thus minimizing incident impact Cost Effective (less than mob of other systems) Design: TM Adapts to the Rigs existing LMRP system Utilizes Rigs existing resources i.e., Personnel and ROV Can be held at rig site or near by (one day away max) Can have only rig specific equipment onboard ABEL LMRP Capping System 2

3 ACS TM and ALCS TM Systems (ABEL offers these two designs) ALCS adapts LMRP for capping ACS is stand alone system (see separate presentation) ABEL LMRP Capping System 3

4 ALCS deployment use of existing rig BOP For capping operation and re entry Normal LMRP Disconnect Well Capped Disconnect ABEL LMRP Capping System 4

5 ALCS ready for deployment (orange added equipment): ABEL LMRP Capping System 5

6 Capping with ALCS TM ABEL LMRP Capping System 6

7 Capping Animation ALCS TM Note: If this does not load from Powerpoint see stand alone file ABEL LMRP Capping System 7

8 Comparison of Existing Capping Systems to ALCS TM Conventional Systems Some are only available to the participants in the region (Operators) VERY heavy hard to transport and rig up offshore Best case for intervention is 21 days likely case is 40 days Very expensive Availability is first come first serve basis Controlled by others ABEL LMRP Capping System Available to the rig quickly Onboard during operations (2 x 20 foot containers) Can be deployed in time it takes to pull riser plus 12 hours to install onto LMRP No need for 747/AN 124 lifts Cost is a fraction of other systems Kill option via DP Disconnect above assembly Saves time reduces exposure ABEL LMRP Capping System 8

9 Abel LMRP Capping System (ALCS TM ) BENEFITS Will solve 99% of deep water blowout scenarios Footprint is small (2x 20 foot containers) Cost is a fraction of other systems Lower cost justifies multiple systems in the field (not air freight from outside the region or country) Mobilization is one day (or less) by boat OR kept on ready on the rig itself Can be disconnected for weather, drive off by design Has kill via DP option immediate after capping Controlled acoustically, ROV panel (from accumulator) or pump to operate each function ABEL LMRP Capping System 9

10 Abel LMRP Capping System (ALCS) RATINGS 15k shut in 10,000 ft working water depth 200,000 std bbls oil flow rate 500mmscf/d gas rate Any combination of oil/gas flows max oil 200k and max gas 500mmscf/d Flow on diversion (if needed) up to 21 days ABEL LMRP Capping System 10

11 Abel LMRP Capping System (ALCS) BASIC OPERATION Powered from pre charged accumulators Acoustic operated as primary system ROV operated via panel as back up Emergency disconnect by ROV or acoustic signal by upper connector DP disconnect by on off tool (rotation) Accumulators can be re charged with ROV Major functions can be pumped by ROV to open/close Chemical injection for hydrate breaker (if needed) Visual read out of temp and pressure at critical points Acoustic readout of pressure and temp ABEL LMRP Capping System 11

12 OLGA 7 Hydraulic Simulations Forces during capping Pressure losses thru the bore of assembly Pressure losses on diversion both lines open one line open Flow thru blind ram during closing analyzed Hydrate injection study Erosional analysis ABEL LMRP Capping System 12

13 Force On Assembly During Initial Entry Into the Flow Flowrate vs Momentum Force Oil Rate Gas Rate Momentum Gas [mmscf/d] 100, ,000 Momentum Force [lbs force] 60,000 40,000 20, ,474 5,222 11,515 20,353 31,734 45, , , , ,000 50,000 Oil Rate [bopd] [bopd] [mmscf/d] [lbs f] 200, , , , , , , , ,353 75, ,734 50, ,659 25, , ,142 Note: Force is combined effect of gas and oil flows ,142 62,128 Note: Assumes 100% transfer of the fluid momentum to the assembly ABEL LMRP Capping System 13

14 Modeling of Results for Flow Forces during capping are minimal not a factor Pressure losses thru the bore of assembly is less than 900 psi max during diversion thru one line Flow thru blind ram during closing does not cause ram packer damage (flow virtually stops before sealing) Erosional effect nil for 300 hours worst case ABEL LMRP Capping System 14

15 DEEPWATER HORIZON On April 2010, there was the Deepwater Horizon incident. Eleven men died but rightly or wrongly the impact on the environment became the main story. ABEL LMRP Capping System 15

16 Potential Risks of Another Incident Damage to the vessel can be covered by Insurance Human tragedy can be covered in worker comp policies Environmental impact max limit if available is about 500m USD and is extremely expensive. (Lloyds reluctant to issue large policy limits post Macondo) Damage to the reservoir not insurable absorbed by operator CONCLUSION o Self insured or at owner / operator s risk o Macondo case: BP seeking $53b from Transocean n Halliburton (received $5b in settlements). Governmental fines in billions. EXPOSURE IS HUGE and CANNOT BE MITIGATED WITH INSURANCE ALONE. ABEL LMRP Capping System 16

17 Mitigation of Risks Means to mitigate pollution risk: o Prevention Don t let it happen in the first place training of personnel adopt best practices o Contingency Plans and Equipment training personnel for capping operations minimize intervention time line by having contingency equipment available at rigsite. ABEL LMRP Capping System 17

18 Blowout Scenario Most likely next case Well control operations occur Successful disconnect BOP leaks (for whatever reason) MODU, LMRP are unharmed BOP leaks cannot be stopped with conventional techniques DO NOT EXPECT Macondo to repeat with same circumstances ABEL LMRP Capping System 18

19 Contingency Equipment Oil Spill Response Equipment 50% of World s total reserves of this equipment was used at Macondo. Subsea Well Capping Systems introduced as a necessary requirement after Macondo. let s have a look at what Capping Systems are currently available Worldwide ABEL LMRP Capping System 19

20 Operator Owned Systems BP owned Houston based Modified horz. 5 1/8 tree Two modules 70k each 15k rating 2x 747 cargo lifts Available to BP and partners BP owned Houston based Modified horz. 5 1/8 tree Two modules 70k each 15k rating 2x 747 cargo lifts SHELL owned Alaska based Artic stack in Alaska for ice in shallow water 10k rating SHELL owned Singapore based Transportable (2x 747) 15k rating SHELL owned Aberdeen based Transportable (2x 747) 10k rating ABEL LMRP Capping System 20

21 Cooperative Owned Systems Marine Well Cont. Corp. MWCC Capping Stack Bore 18 3/4 15k rating Available to GOM only Oil Spill Prevention n Response Advisory Group (OSPRAG) Artic stack in Alaska for ice in shallow water 10k rating Marine Well Cont. Corp. MWCC Narrow profile Capping Stack 10k rating Available to GOM only Helix Well Cont. Group (HWCG) Stored in Houston (inland) 15k rating Subsea Well Response Project (SWRP) 2x 15k rating 2x 10k 4 each based in Singapore, Brazil, Norway and S. Africa Must be mobilized to site from base and installed offshore ABEL LMRP Capping System 21

22 Subsea Well Response Project (SWRP) Requires additional connector Must tie back with flex hose to sea surface to pump to kill Takes time to mobilize to site ABEL LMRP Capping System 22

23 MWCC Capping System MWCC: subsea capping stack is 30 x 14, weighs 100 tons, operates in water depths up to 10,000 ABEL LMRP Capping System 23

24 Production oriented technique ABEL LMRP Capping System 24

25 MWCC Overall System ABEL LMRP Capping System 25

26 Contact: Bill Abel engr.com or Tom Macrae engr.com engr.com

27 Presentation End Thank you!