ID: 844
OBJECTID: 844
wlbNpdidWellbore: 2095
wlbName: 25/2-15 R
wlbHistory:

General

The well is located in the southern part of block 25/2, and was designed to recognize the petroleum potential of the so-called Jurassic Prospect 1. The main objective of the well was to explore the Middle Jurassic Brent sandstones. An optional objective was Early Jurassic Statfjord sandstones, depending on the petroleum results at the Brent level.

Well 25/2-15 R is a re-entry of well 25/2-15, which was drilled with the semi-submersible installation West Alpha. Due to a fire on the West Alpha installation the well was temporarily abandoned on 13 January 1993, with the drill string in the hole. The purpose with the re-entry was to retrieve the West Alpha BOP, fish out the lost drill string, perform logging, and set 9 5/8" casing. After that normal exploration drilling would be resumed to fulfil the original geological objectives.

Operations and results

Wildcat well 25/2-15 was re-entered (25/2-15 R) with the semi-submersible installation West Vanguard on 6 February 1993. West Vanguard was chosen due to availability and compatibility with the West Alpha BOP system.

The lost drill string was successfully fished and retrieved and the hole was logged. Due to poor hole conditions after three weeks of open hole the logging program was not successfully accomplished. The 9 5/8" casing was ran and cemented with shoe at 3498 m. The well was temporary plugged, the drill string laid down, the West Alpha BOP was retrieved and secured on the BOP trolley.

All geological results from the well are given in the 25/2-15 R2 history.

On 1 March 1993 the well was suspended, and the rig was moved to Dusavika for BOP change out.

Testing

No drill stem test was performed in the well.

wlbHistoryDateUpdated: 2016-07-06T00:00:00