Feb. 14, 2006


Description

Shell Exploration and Production successfully deployed an automated bottomhole pressure control system developed by Shell International R&D called Dynamic Annular Pressure Control (DAPC) to solve lost circulation and hole instability problems in a deep water Gulf of Mexico well on the Mars Tension Leg Platform after two failed sidetrack attempts. Dynamic Annular Pressure Control is a system designed to apply controlled annular surface pressure, with the goal of maintaining constant bottomhole pressure. Bottomhole pressure (BHP) can be maintained at any desired over/under balance by use of a lower mud weight than typical, and adjustment of surface backpressure as the circulation rate is varied.
In Shell’s maturing deep water developments, rock stress redistribution due to reservoir depletion is causing drilling problems on a scale not seen in the past. High mud weights are still required for hole stability, but reduced fracture gradients have been observed both in reservoir and non-reservoir rock. DAPC was used in the third attempt to sidetrack the Mars A-14 well, to keep Equivalent Circulating Density within the shrinking pore pressure / fracture gradient window.
The DAPC system was fabricated, installed and tested on a fast track basis after a review of the technology indicated a high likelihood of enabling the well to be drilled without problems. Cased hole tests indicated that BHP could be maintained within the required limits. The mud weight was reduced for the problematic section, and the well reached planned total depth without experiencing lost circulation or hole instability problems. The production liner was run and cemented without incident.
DAPC has been demonstrated as a promising new tool to solve drilling problems associated with reservoir depletion. As the technology matures, it has the potential for broad application to effectively widen the pore pressure / fracture gradient window in deep water, HPHT, extended reach and other challenging drilling environments by continuously and automatically maintaining a desired bottom hole pressure.

Pre-registered participants receive guaranteed seating.  Walk-ins welcome.  With numerous walk-ins, seating may become limited for walk-ins, please pre-register online to guarantee a seat.

 

 

 

 

 


Featured Speakers

Speaker Vincent C. Roes
Superintendent, Mars/Ursa Rig Operations Shell Exploration and Production Co. Mr. Roes is currently a Rig Superintendent with Shell Exploration and Production Company, responsible for drilling and completion operations on the Mars and Ursa tension leg platforms. A Petroleum Engineering graduate of the University of Alberta , he has been involved ...

Superintendent, Mars/Ursa Rig Operations
Shell Exploration and Production Co.

Mr. Roes is currently a Rig Superintendent with Shell Exploration and Production Company, responsible for drilling and completion operations on the Mars and Ursa tension leg platforms. A Petroleum Engineering graduate of the


University of

Alberta , he has been involved with drilling projects since 1983 in

Canada , the

Netherlands ,

Oman , and

Argentina before his assignment to the deep water

Gulf of Mexico in 2001.

Full Description



Organizer

Jason Baihly


Date and Time

Tue, Feb. 14, 2006

11:30 a.m. - 1 p.m.
(GMT-0500) US/Central

Event has ended

If you do not have a full-time job in the oil and gas industry, are a full-time student or Member in Transition (MiT) member, and you do not see a discounted registration fee for students/MiT regarding this event, please contact the GCS manager at spe-gcs@spe.org.


Location

Greenspoint Club

16925 Northchase
Houston, Texas