ConocoPhillips has set a new record for the longest well ever drilled in Alaska.
ConocoPhillips Alaska said on Thursday that it set the record at the drill site CD5 in the Colville River Unit (Alpine) on Alaska’s North Slope.
CD5 is the first commercial oil development on Alaska Native lands within the boundaries of the National Petroleum Reserve-Alaska (NPR-A).
The company said the Doyon Rig 19 drilled a horizontal injection well 26,196 feet, a record for overall measured length of a well for the state.
The well was drilled to a true vertical depth of about 7,400 feet and had a horizontal leg of 17,228 feet.
The well took 24 days to drill and encountered Alpine “A” sands, ConocoPhillips said.
“Longer wells allow the company to access more of the reservoir without increasing the gravel footprint of the development…Ultimately, longer wells like these could mean more oil produced over a longer period of time,” manager of drilling and wells for ConocoPhillips Alaska Mike Wheatall said.
Alpine was the first North Slope field developed exclusively with horizontal well technology.
The company said that more than 60 square miles of subsurface can be accessed from a single drilling pad.
Wheatall added that, since first oil at Alpine in 2000, advanced technology has made it possible to drill longer wells that can access more of a field’s oilbearing zone.
ConocoPhillips Alaska said in April that funding had been approved for additional wells and associated on-pad infrastructure at the CD5 drill site.
The additional wells and infrastructure will bring CD5 to its full permitted well capacity.
CD5 is also exceeding its original production target of 16,000 barrels of oil per day gross.
ConocoPhillips said CD5 is currently producing about 20,000 BOPD gross average, year to date
“This exciting drilling record at Alpine is a significant technological achievement…This accomplishment continues our tradition of innovation and developing resources in a way that minimizes impacts to the environment,” ConocoPhillips Alaska president Joe Marushack said.
CD5 is part of the Colville River Unit and is operated by ConocoPhillips Alaska with a 78 percent interest.
A subsidiary of Anadarko Petroleum Corporation holds a 22 percent interest.