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Book Chapter

The Malory Field, Block 48/12d, UK North Sea

By
R. E. O’Brien
R. E. O’Brien
Mobil North Sea Ltd., Grampian House, Union Row, Aberdeen AB10 ISA, UK (an Exxon Mobil subsidiary)
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M. Lappin
M. Lappin
Mobil North Sea Ltd., Grampian House, Union Row, Aberdeen AB10 ISA, UK (an Exxon Mobil subsidiary)
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F. Komlosi
F. Komlosi
Mobil North Sea Ltd., Grampian House, Union Row, Aberdeen AB10 ISA, UK (an Exxon Mobil subsidiary)
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A. Loftus
A. Loftus
Mobil North Sea Ltd., Grampian House, Union Row, Aberdeen AB10 ISA, UK (an Exxon Mobil subsidiary)
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Published:
January 01, 2003

Abstract

The Malory Field straddles blocks 48/12d and 48/12c of the UK Sector of the Southern North Sea on the western margin of the Sole Pit Trough. The field is located within an upthrown part of the Dowsing Fault Zone and was discovered by the Mobil operated well 48/12d-9 in early 1997.

The Malory Field is a small fault-bounded horst structure with expected recoverable reserves of 75BSCF. The reservoir consists of a 249 ft-section of Lower Permian, Rotliegendes Leman Sandstone Formation sandstones, is sourced from the Carboniferous Westphalian Coal Measures below, and is sealed by overlying Upper Permian Zechstein evaporites.

Reservoir quality is generally good with an average porosity of 14.7% and core permeabilities (Kh) between 0.2 and 1651 mD. This preservation of reservoir quality is attributed to a combination of the structure being located on a broad palaeostructural high, with a lower maximum burial depth than adjacent structures and associated lower compactional porosity loss, the presence of an early hydrocarbon charge and the preferential precipitation of chlorite over illite cements.

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Contents

Geological Society, London, Memoirs

United Kingdom Oil and Gas Fields Commemorative Millennium Volume

J. G. Gluyas
J. G. Gluyas
Acorn Oil Gas Ltd, Staines, Middlesex, UK
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H. M. Hichens
H. M. Hichens
Oil and Gas Directorate, London, UK
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Geological Society of London
Volume
20
ISBN electronic:
9781862393950
Publication date:
January 01, 2003

GeoRef

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