New Technologies for Cost Effective Abandonment Operations. Delaney Olstad, Weatherford

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1 New Technologies for Cost Effective Abandonment Operations Delaney Olstad, Weatherford

2 Abandonment Options Crane Assisted Operations Light Duty Work Decks Wireline Coil Tubing 2

3 Abandonment Options Jack-Up Rigs Pulling & Jacking Unit Modular Workover / Drilling Rigs 3

4 Comparisons Rig-Based Operations Features Familiarity Potentially faster trip times when pulling doubles and triples Jackup rigs are self-sustained Limitations Downgraded platform capacities when using existing equipment Cost and time to upgrade Jackup rigs not suitable for deep-water applications Increased logistical costs due to crew and equipment requirements Removes the system from drilling campaigns Higher day rate 4

5 Comparisons Crane-Based Operations Features Flexibility to address all well/platform configurations Low day rate Minimal POB Smallest footprint Limitations Limited operating capabilities with platform cranes No rack back storage Nonproductive time (NPT) due to wind speeds, mechanical downtime and lack of SimOps Less flexibility/contingency in dealing with changing well conditions 5

6 Evolution of the Industry Bridging the gap Rig-Free Systems

7 New Technology 7

8 Rig-Free Pulling & Jacking Unit Design Capability Rigless Modular Small footprint / lightweight Maintain pulling capability Innovative Versatile & flexible Quick mobilization Applications Well Abandonment Slot recovery Rig up and repair well conductors Change out tubing Pull and lay down production casing Plug and abandon wells Cut and pull well conductors Set whipstock Perform section milling Run internal casing and tubing patches Run and retrieve down hole electric pumps Product- Managed Well Intervention & Abandonment Services 8

9 Rig-Free Pulling & Jacking Unit Intervention and Abandonment Unit Lifting capacity: 600,000 lbs. Jack size: 36 in. Pulling capacity: 220,000 lb Pulling stroke: 60 ft. Milling stroke: 30 ft. Racking capacity: 10,000 ft. of 3-1/2 Heaviest lift during mob: 27,000 lb API-certified to operate in 60 knot winds Hurricane preparedness time: 24 hours 9

10 Rig-Free Pulling & Jacking Unit Intervention and Abandonment Unit Features Accelerated rig up time of modular based assembly Modular lifts can be tailored to platform crane capacity Minimized foot print per platform requirements Support riser heights are designed to accommodate different abandonment or workover requirements Efficient skidding operations (with BOP) Rack back storage for tubular products Dropped object mitigation integrated into the design of Unit Typical operations consist of two (2) five (5) man crews working 24 hour operations 10

11 30/1000 Pulling and Jacking Unit API 4F stamped Pulling Capacity: 30,000 lbs. Pulling Stroke: 44 ft. (nominal) Max Operating Wind: 60 knots Jacking Capacity: 1,000,000 lbs. Jacking Stroke: 5 ft. Jacking Diameter: 36 maximum Typical operations consist of two (2) five (5) man crews working 24 hour operations Quick mobilization from well to well 11

12 Case Histories - Versatility Successfully plugged and abandoned all 11 wells Zero environmental or safety issues during the operation, which took an estimated 49,476 hours (Weatherford) and a total 204,708 hours (contractor s hours included) Project was completed successfully in 299 days, significantly ahead of the authorization-forexpenditure (AFE) target of 365 days Cost savings of US$6.6 million 12

13 Case Histories - Efficiencies Intervention & Well Abandonment Project 11 well, 10 abandonment and 1 intervention campaign in 1000-ft water depth Minimal necessity of platform crane allows for simultaneous operations Carried out coil tubing operations when high winds (up to 60 knots) would have prevented crane usage Well-trained, multidisciplinary, safety-focused personnel logged over 80,000 hours Project was completed 108 days ahead of schedule with a cost savings of US$10.8 million 13

14 Case Histories - Intervention GOM in 1,020 of water. Pull and lay down tapered string of 236 joints of 4-1/2'' 12.6 PPF chrome tubing and 123 joints of 2-7/8 6.4 PPF tubing. Utilizing Weatherford Tubular Running Services new tapered string of 2-7/8'' and 4-1/2 chrome tubing was run. Well was successfully re-completed and turned over to production. GOM in 773 of water. Well had 10 collapsed gas lift mandrels and 2-7/8 tubing. Five overshot trips and one wash over trip were made to recover all collapsed gas lift mandrels and 2-7/8 tubing. Final depth reached was 10,341. Well was successfully re-completed and turned over to production. This job was completed at 75% of the expected AFE cost. 14

15 Case Histories - Intervention GOM in 73 of water. Three wells required extensive clean out due to lost fish in tubing and other problems. The project was not economical using traditional platform rig and services. Operator was able to use the Weatherford Pulling & Jacking Unit with a package of several services to make the intervention project viable. The three wells were of similar construction and depth. 7-5/8 casing with 2-7/8 production tubing. Wells were re-completed and turned over to production. It was reported that the production from the wells increased by over 300% GOM in 1,353. Rig up Weatherford Pulling & Jacking Unit. Pull out of hole laying down tubing. Run in hole and perforate the sand completion from 14,277-14,285 and 14,292-14,320 MD. FRAC pack the completion interval and run 2-7/8 production tubing. Well was recompleted and turned over to production. 15

16 Case Histories - Operational Data Abandonment Time, Cost & NPT Analysis Average Days per Well Total NPT Days 111 % 162 % 183 % 27 % Average Cost per Well P&J Rig Crane Unit 134 % 60 % P&J Rig Crane Unit P&J Rig Crane Unit 16

17 Conclusion Our working goal is to provide a single source for all well abandonment and intervention operations with more advantages and efficiencies while maintaining focus on the environment and safety culture. Well abandonment is a specialized activity that require meticulous planning and the best use of technology, equipment and resources to control costs, ensure worksite safety, protect the environment and maintain operator reputation. The ideal equipment design is fit-for-purpose and inherently safe while having the mobilization characteristics of a crane system but the operational capabilities of a rig. 17