HPHT Conference London Nov, 2011 “Use of MPD on Mandarin eHPHT Well”

November 15th, 2011

Sigve Krohn Naesheim BG Norge WE Team Leader

Where Mandarin Fits into the Regional NS HTHP Environment

2

3

North

UK Norway

Judy/Joanne

Jasmine

Jade

Elgin/Franklin

Jackdaw

Mandarin Regional Location

Mandarin

Mandarin 1/3-12S Overview

4 Overview

• 20” Surface casing set at 1132m.

• 13 5/8” intermediate casing weighing 1.3 million lbs set at 4202m.

• 9 7/8” x 10 ¾” prod casing weighing 1.65 million lbs set at 5400m.

• 8 ½” Hole drilled to TD at 5932m.

• Mud used in 8 ½” was Magmatec

• Pressure in Kimmeridge was 17,500 psi (5560m MD).

• Mud weight from 5560m was 2.23 sg/ 18. 6 ppg.

• Temperature was appr. 210 deg / 400+ F at TD.

• FIT at 9 7/8” shoe was 19.5 ppg/ 2.33 sg.

• Open hole FIT in kick interval was 19.1 ppg/ 2.29

5

Line allows conventional hole fill practise if required, when RCD bearing installed.

MPD flow path

7875 RCD

Line allows the application of SBP rig mud pump during connection.

Or ability to divert flow to MGS mud gas content increases.

3” automated choke for application of SBP. Note identical back up on opposite leg.

Flow meter for 1. Flow Out 2. MW Out 3. Temperature

Weatherford RGVI - MPD Layout & Flow Path

Returns to rig flow line

GC Tracer real time gas in mud detection probe.