ID: 486
OBJECTID: 486
wlbNpdidWellbore: 495
wlbName: 34/10-9 R
wlbHistory:

General

Well 34/10-9 R is a re-entry of well 34/10-9 on the central part of the Gullfaks Field. Well 34/10-9 drilled to 2200 m in the Early Jurassic Burton Formation and proved oil in the Brent Group and Cook Formation. The objective of the re-entry was to drill further to the Statfjord Formation and to conduct drill stem tests in the Brent Group and Cook Formation.

Operations and results

Appraisal well 34/10-9 was re-entered with the semi-submersible installation Deepsea Saga on 29 May1980 and drilled from 2200 m to final TD at 2421 m in the Nansen Member of the Early Jurassic Statfjord Formation. Drilling and testing were carried out without any specific problems. The well was drilled with a gel/lignosulphonate mud system from 2200 m to TD.

The Statfjord Formation proved to be water bearing.

Two cores were cut from 2400 m to 2405.5 m in the Nansen Member of the Statfjord Formation with 74% total recovery. No wire line fluid samples were taken.

The well was permanently abandoned 3 July 1980 as an oil appraisal well.

Testing

Three drill stem tests were performed in the re-entry.

DST 1 tested the interval 2103 to 2109 m in the Cook Formation. The well produced 34.2 API oil at unstable conditions. The average flow rate on a 20/64" choke was 42 Sm3/day with a GOR of 69 Sm3/Sm3 and traces of water. The maximum temperature recorded down hole at the gauge was 84.4 deg C.

DST 2 tested the interval 20
wlbHistoryDateUpdated: 2016-07-06T00:00:00