Managed Pressure Drilling New Convention in Deepwater Wells. Brian Grayson, Bhavin Patel, Alice Gomez Weatherford International

Transcription

1 Managed Pressure Drilling New Convention in Deepwater Wells. Brian Grayson, Bhavin Patel, Alice Gomez Weatherford International June Vienna, Austria Weatherford. All rights reserved. 1

2 2003: Industry acceptance of MPD Weatherford s Application of MPD System 2005: Application of offshore-pmcd in Asia How can I drill this well? 2

3 Offshore Evolution: Asia Pacific Pressurized Mud Cap Drilling (PMCD) Moved from Jack-up to floating rigs utilizing conventional land based RCD systems (Riser Cap) Utilized a Model 7100 RCD installed on top of the rigs collapsed telescopic joint.

4 Application & Lessons Learned Application of 7100 series RCD (Land version) above telescopic joint. Limited application due to drill pipe size limitation Use of manual or Semi-automatic chokes Manual system - Level of automation* = 1 *Ref: Ensley et al, 1999 and Macpherson et al,

5 2003: Industry acceptance of MPD 2005: Application of PMCD in Asia Weatherford s Application of MPD System 2008: Deployment of first Marine Based RCD System How can I drill this well? How can I improve the economics of this well? 5

6 Offshore Evolution: Deploy first marine based RCD system 7875 Docking Station deployed above tension ring (ATR) Self lubricated bearing and remote operated latch removes need for manual intervention

7 Scope of Application Bearing assembly I.D. of 8.88 inches allows accommodates 6-5/8 drill pipe A Bearing Assembly Retrieval Tool (BART) is used deploy and retrieve the Bearing Assembly Application of Automated chokes and Early kick detection & control. Level of Automation* = 3 *Ref: Ensley et al, 1999 and Macpherson et al,

8 2003: Industry acceptance of MPD 2005: Application of PMCD in Asia 2008: Deployment of first Marine Based RCD System Weatherford s Application of MPD System 2013: Industry s first API monogramme d RCD How can I drill this well? How can I improve the economics of this well? How can I improve operational safety? 8

9 Offshore Evolution: Reduction of RCD Bearing Assembly O.D. to to accommodate smaller riser I.D.s Addition of MPD Buffer Manifold to allow for transition between Constant Bottom Hole Pressure (CBHP) and PMCD BTR DSIT Flow Spool RCD Assembly

10 Scope of Application Complete first API monogramed RCD Deploy first RCD below tension ring and below water line Integrated fit for purpose subsea MPD Riser Assembly: BTR RCD, DSIT, Flow Spool Full tensile capability of 3 million lbf. Level of automation* = 7 *Ref: Ensley et al, 1999 and Macpherson et al,

11 Case Studies: Indonesia Asia Pacific region is prone to tectonic movement, underwater landslides, heavily faulted and folded strata, lost circulation zones and uncontrolled mud flows. The conglomerates, igneous, and carbonates prevalent in this region present many drilling challenges. Objective Safely and efficiently drill exploration deepwater well Results Early kick detection and well-pressure management capabilities to enable immediate completion of the drilling environment without any safety or environmental issues Enabled drilling to proceed to target depth despite circulation issues

12 Current State Application of automated back pressure pump During connections pump ramp up schedules are eliminated through automation. Improved modeling capabilities real time hydraulics modelling and heave correction for better kick/loss detection. Improved kick tolerance via early detection and automated control. Evaluate possibility for influx to be circulated through riser. 12

13 Weatherford s Offshore MPD Applications Fixed=23 Floating=0 Fixed=5 Floating =1 Fixed=7 Floating=6 Fixed=3 Floater=3 Fixed=17 Floating=14 Fixed=12 Floater=7 Total Offshore Operations: 103 Operations from Fixed Rigs: 72 Operations from Floating Rigs: 31 (Total including land: 237) *as of 04/15/2014

14 Looking Ahead: 2014 Onward Primary Focus : Process Safety improvement through Higher level of Automation Training the future crew Closed Loop Ready Solutions Integrated MPD riser joint Integrated automated MPD choke manifold 14

15 Summary Closed Loop Drilling using RCD and automated chokes provides better control over wellbore hydraulics profile and becoming norm to drill deep water wells. Lessons learned have provided valuable feedback to improve reliability and level of automation. Automated kick/loss detection and control system is instrumental to meet well control and process safety challenges of deep water wells. 15

16 Thank You Questions? 16