The Geological Society

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Petroleum Geology of the Irish Sea & Adjacent areas

Product Code:	SP124
Series:	GSL Special Publications - print copy
Author/Editor:	Edited by N. Meadows (Redrock, UK), S. Trueblood (BHP Petroleum, UK), G. Cowan (BritishGas, UK) and M. Hardman (British Gas, UK)
Publication Date:	09 February 1998
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Description

Historically the sedimentary basins to the west of mainland Britain have taken a back seat role in the exploration of the UKCS.Throughout the 1980's the discovery and development of fields in the prolific basins of the North Sea retained both thetechnical focus and, more importantly, the budget funds of major operators. Consequently, the history of exploration in westernareas, and particularly in the East Irish Sea Basin, is one of alternating feasts and famines. In this context, the period of 1990 to1995 represents a major feast, the second such feast in the exploration history of the region. More importantly, a veritable feastboth in the volume of hydrocarbons discovered and the apparent advancement of geological understanding. The initial leap forward, made during the mid 1970's in the East Irish Sea Basin, is, however, likely to remain the volumetrically most important. Current workers in these basins owe a great debt to the early pioneers who carried out the initial explorationand simultaneously had to break the mould of traditional North Sea thinking. Ultimately it was the discovery of the giant Morecambe Field in 1974 which proved the value of exploration in the west but thefull potential of the area has, we believe, yet to be realised. Witness the efforts of the early 1990's which overturned the 'onefield gas basin' paradigm and transformed the East Irish Sea Basin into a mature oil and gas province. This gave impetus to exploration, drew attention to the geological complexity and, in so doing, added more than a dozen fields to the maps of the area including the oil fields of Douglas and Lennox. This book provides a snap-shot of current understanding on the petroleum geology of the East Irish Sea and adjacent areas.We hope that it will prove a platform for further exploration in basins west of Britain.

Type:	Book
Ten Digit ISBN:	1-897799-84-5
Thirteen Digit ISBN:	978-1-897799-84-0
Publisher:	GSL
Binding:	Hardback
Pages:	480
Weight:	1.18 kg

Contents

The East Irish Sea Basin: from caterpillar to butterfly, a thirty-year metamorphosis • Stratigraphy • Stratigraphical relationships and a revised lithostratigraphical nomenclature for the Carboniferous, Permian and Triassic rocks of the offshore East Irish Sea Basin • The Penarth Group-Lias Group succession (Late Triassic-Early Jurassic) in the East Irish Sea Basin and neighbouring areas: a stratigraphical review • Regional structure • The Mesozoic and Tertiary history of the Irish Sea • Lower crustal structure of the East Irish Sea from deep seismic reflection data • Variation in thermal history styles around the Irish Sea and adjacent areas: implications for hydrocarbon occurrence and tectonic evolution • Basin analysis • The geology and hydrocarbon prospectivity of the North Channel Basin • Tectonic evolution of the Larne Basin • Structural evolution of the Isle of Man and central part of the Irish Sea • The hydrocarbon potential of the Cheshire Basin • Real and relict direct hydrocarbon indicators in the East Irish Sea Basin • Geochemistry • The occurrence and correlation of oils and Namurian source rocks in the Liverpool Bay-North Wales area • Fluid migration history in the North Irish Sea-North Channel region • The presence of sulphate-reducing bacteria in live drilling muds, core materials and reservoir formation brine from new oil fields • Sedimentology • Clastic sabkhas and diachroneity at the top of the Sherwood Sandstone Group: East Irish Sea • Challenging the `sheetflood’ myth: the role of water-table controlled sabkha deposits in redefining the depositional model for the Ormskirk Sandstone Formation (Lower Triassic), East Irish Sea Basin • Early Dinantian evaporites of the Easton-1 well, Solway Basin, onshore Cumbria, England • Fault analysis and diagenesis • Fault analysis of the Cheshire Basin, NW England • Characteristics of fault zones in sandstones from NW England: application to fault transmissibility • Faulting and porosity modification in the Sherwood Sandstone at Alderley Edge, northeastern Cheshire: an exhumed example of fault-related diagenesis • Diagenesis of the Sherwood Sandstone Group in the southern East Irish Sea Basin (Blocks 110/13, 110/14 and 110/15): constraints from preliminary isotopic and fluid inclusion studies • Field studies • Regional diagenetic controls on reservoir properties in the Millom accumulation: implications for field development • Calder Field appraisal well 110/7a-8, East Irish Sea Basin • The Douglas Field • The Lennox oil and gas field

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