American Oil and Gas Reporter - April 2015 - 111

"We talk about safety constantly," he mentions. "We look at
safety as a competitive differentiator for Hess. You can have the
best reservoir and best facility in the world, but if you have major safety incidents, nothing else will matter."
During drilling with the Stena Forth, a dynamically positioned
Class 3 drill ship, safety factors were crucial when drilling through
the massive salt sheets and optimizing the bottom-hole locations,
he says.
"As you come out of the salt, there is a potential pressure differential that creates the risk for well control," McEvilly observes.
"We had to anticipate that and mitigate risk as we moved forward.
Also, because of the exclusion zone at the salt face, there is potential for a sidetrack, so you want to set yourself up for success
in the event you do not find your objective. You would have an
open-hole sidetrack as opposed to a cased hole, which can cost
$10 million versus $40 million."
The first well drilled at Tubular Bells was well B, followed
by well D and then well A, with the company effectively moving from a P50 drilling operation on well B to a P10 on well A,
McEvilly says, because of vigilance in applying lessons learned
and continually checking and adjusting operations to ensure a high
level of drilling performance.
"At the end of the day, we worked to minimize nonproductive time without sacrificing quality and safety," he insists. "That
is where we want to be, not just from a drilling and completions
standpoint, but from an overall project execution and development perspective. If you look at independent benchmarking of
industry projects, we were within the top quartile in each of the
key areas on Tubular Bells."
For Hess, the lessons learned in the fast-track development
of Tubular Bells will be leveraged to help ensure success on other projects, McEvilly notes. That includes international developments (Hess has offshore operations in the North Sea, West Africa
and Asia) as well as in the Gulf of Mexico (Hess' deepwater Gulf
inventory includes about 200 blocks).
"We are in the post-appraisal stage in the deepwater Tano project offshore Ghana, and I and other members of the Tubular Bells
project are transitioning to West Africa as well as other opportunities throughout the world," he says. "The objective is to build
off what we accomplished at Tubular Bells."
Another project Hess hopes to build on is Stampede, located
in more than 3,500 feet of water at Green Canyon Blocks 468,
511 and 512. One of the world's deepest fields with reservoir
depths up to 30,000 feet, Hess and its co-owners sanctioned Stampede (unitizing the former Knotty Head and Pony subsalt discoveries) last October. Hess is operator with a 25 percent working
interest, with Chevron subsidiary Union Oil Company of California, Statoil, and Nexen Petroleum Offshore U.S.A. each holding 25 percent working interests.
Stampede is estimated to hold 300 million-350 million boe
of estimated recoverable resources. Initial plans for the estimated $6 billion field development call for six subsea production
wells and four water injection wells tied to a tension leg platform with gross topsides capacity to process 80,000 barrels of
oil a day. The first rig in a planned two-rig drilling program is
expected to begin drilling in the fourth quarter, with first production in 2018.
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APRIL 2015 111



American Oil and Gas Reporter - April 2015

Table of Contents for the Digital Edition of American Oil and Gas Reporter - April 2015

Contents
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