| AOGCC Pool Statistics | Colville River Unit, Alpine Oil Pool |
|
| Operator: | ConocoPhillips Alaska Inc. | ![]() |
| Discovery Well: | ARCO Alaska Inc. | ||
| Bergschrund No. 1 | |||
| Permit #194-026 | |||
| API No. 50-103-20207-00-00 | |||
| Sec. 32, T12N, R05E, UM | |||
|
| Depth: 7,502’ MD / 7,501' TVD | ||
|
|
Arpil 14, 1994 |
| Status: | Producing | |||||
| Location: | Central Arctic Slope | Area Location Map | Unit Location Map | DNR Unit Map | ||
| Orders: | Complete List | |||||
| Summary: | Discovered
in 1994, the Alpine Oil Pool has now been penetrated by more than 100
wells, most of which are horizontal production and injection wells. The pool began regular production
in May of 2000, and has greatly exceed expectations: originally
projected to produce 80,000 barrels of oil per day, the Alpine Oil Pool
averaged 97,486 barrels per day during 2003. Facilities upgrades are
expected to boost production during the next few years. Alpine is a
model for future oil development; its facilities occupy only 97 surface
acres, but it produces from about 25,000 acres (39 square miles) of
reservoir. In 2003, development drilling at Alpine surpassed the 1
million foot milestone, with over 230,000 feet (nearly 52 miles) of
horizontal well bore open to the reservoir.
| |||||
| Geology: | The
reservoir consists of the Alpine Sands, an informal member of the
Jurassic-aged
(Ellesmerian) Kingak Formation that lie between 6,876’ and 6,976’
measured depth in Bergschrund No.1. These are stratigraphically the
highest sand
units in the Kingak within the Colville Delta area. They are shallow
marine, v. fine to fine-grained, quartz-rich sandstone layers deposited
on a southerly prograding
shelf, and elongated in an east-west direction. Gross thickness of the
combined reservoir sandstone layers ranges up to 100’. The Alpine
structure is a homocline that dips southwest at a rate of about 100’
per mile. This homocline is broken by several minor,
northwest-trending, down-to-the-west, normal faults that average less
than 30’ in vertical displacement. Porosity and permeability
range approximately from 15% to 23% and 1 to 160 md,
respectively. No oil-water or gas-oil
contacts have been observed. (CO 443A)
| |||||
| Structure Map | Strat Column | Type Log | Base of Alpine Map | |||
| Orig. Oil in Place: | 650 to 750 MMSTB (Conservation Order 443A) |
| Production: | Prod Chart | Prod Report | Prod Data | |||||
| Oil (bbls) | NGL (bbls) | Gas (mcf) | Water (bbls) | |
| Cumulative | 137,638,564 |
0 | 162,358,921 | 1,218,628 |
| 2001 Total | 28,688,013 | 0 | 33,603,512 | 0 |
| 2002 Total | 35,041,115 | 0 | 39,872,326 | 103,230 |
| 2003 Total | 35,582,431 | 0 | 41,593,887 | 327,763 |
| 2004 Total | 36,096,080 | 0 | 45,198,430 | 745,849 |
| 2003 Daily Rate | 97,486 | 0 | 113,956 | 898 |
| 2004 Daily Rate | 98,893 | 0 | 123,831 | 2,043 |
| Change (%) | 1% | 0 | 9% | 128% |
