is the term used in this report for an amalgamation of shales of Visean to early Namurian age that includes the Bowland Shale Formation (and its equivalents) together with older shales which equate to the Hodder Mudstone Formation
1 The Bowland-Hodder shale gas play (or Bowland-Hodder shales) is the term used in this report for an amalgamation of shales of Visean to early Namurian age that includes the Bowland Shale Formation (and its equivalents) together with older shales which equate to the Hodder Mudstone Formation. Kirky Misperton 1 drilled a complete Bowland-Hodder unit thickness of 4598 ft (1401 m). The organic-rich upper part of the Bowland-Hodder unit is typically up to c.500 ft (150 m) thick, but locally reaches 2900 ft (890 m). The syn-rift lower part of the Bowland-Hodder unit is considerably thicker, reaching 10,000 ft (3000 m) in the depocentres The Bowland‐Hodder shale, of Carboniferous age, is the source rock for gas fields in the Irish Sea. Operators exploring for shale gas in the UK include Cuadrilla, Centrica, IGas, and Dart. Chad Hartman is the Chief Technology Advisor at Weatherford Labs in Golden, Colorado, where he has worked for the past 13 years. He holds a BSc. in chemistry from Ft. Lewis College in Durango. The UK had large conventional gas fields in the southern North Sea, but has used and exported most of this supply. Shale gas activities in Britain: results of a BGS-DECC study on the Bowland and Hodder shales in the North of England. Details of how the estimate was made are in the report but in brief the key to the estimate was to calculate the volume of shale in the chosen area. To get this BGS built a 3D static model using 64 key wells and 15000 miles of seismic, as well as years of data from shale outcrops. In well 41/24a-2, the base of the Bowland Shale Formation is marked by a sharp downhole increase in velocity and decrease in gamma-ray response, corresponding to the top of the highest limestone bed of the Yoredale Formation. The base of the formation has not been penetrated in other North Sea wells. Definition of Upper Boundary: The top of the formation is taken at the base of the Millstone Grit Group over most of the Pennine Basin and at the base of the Morridge Formation in Staffordshire and the East Midlands. In the Craven Reef Belt, in the Malham Cove/Gordale Scar area, the fissile mudstones with nodules and thin beds of ironstone and limestone of the Bowland Shale Formation, rest unconformably and diachronously on the Malham Formation (Great Scar Limestone Group), or Yoredale Group. The most extensive shale gas play in the UK is in the Carboniferous Bowland-Hodder unit that is located, at prospective depths, across Northern England in a strip stretching from the Lancashire coast in the west to the Yorkshire coast in the east. Exploitation of onshore shale gas resources in North America has, in the past few years, reversed a decline in domestic natural gas production and helped reduce gas prices. Vast resource estimated in UK's Bowland-Hodder shale. The following is the summary from the recent assessment by the British Geological Survey and UK Department of Energy and Climate Change of gas in place in the Bowland-Hodder shale in the central UK onshore (OGJ Online, June 27, 2013). Assessment of shale gas resources in the UK is in its infancy. This report summarizes the background geological knowledge and methodology which has enabled a preliminary in-place gas resource calculation to be undertaken for the Bowland-Hodder (Carboniferous) shale gas play across a large area of central Britain In the report the main lower Carboniferous shale unit (known as the ‘Bowland-Hodder unit’) was shown to be up to 5000 m thick in basin depocentres (e.g. the Bowland, Blacon, Gainsborough, Widmerpool, Edale and Cleveland basins; Fig. Details of how the estimate was made are in the report but in brief the key to the estimate was to calculate the volume of shale in the chosen area. To get this BGS built a 3D static model using 64 key wells and 15000 miles of seismic, as well as years of data from shale outcrops. Overall, in the Bowland-Hodder shale, five criteria are clearly met, two are satisfied using partial data, one fails and three are unknown. The failed criteria is the size of the ‘basins’ (small), and the high number of faults present in the UK prospectives; small basins and faults make gas extraction less productive. On 27 June the Department of Energy and Climate Control (DECC) released a study by the British Geological Survey (BGS) showing that the shale gas resources under a swath of northern England, called Bowland-Hodder shale, could be enough to fuel the UK for 40 years. The Bowland-Hodder shale gas play is the term used in this report for an amalgamation of shales of Visean to early Namurian age that includes the Bowland shale formation and its equivalents together with older shales which equate to the Hodder mudstone formation (Fig. 1). The following is the summary from the recent assessment by the British Geological Survey and UK Department of Energy and Climate Change of gas in place in the Bowland-Hodder shale in the central UK onshore (OGJ Online, June 27, 2013). Assessment of shale gas resources in the UK is in its infancy.
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/226874/BGS_DECC_BowlandShaleGasReport_MAIN_REPORT.pdf http://pttc.mines.edu/UK_Shale.pdf http://www.shale-gas-information-platform.org/areas/the-debate/shale-gas-activities-in-britain-results-of-a-bgs-decc-study-on-the-bowland-and-hodder-shales-in-the-north-of-england.html http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=BSG http://www.geoexpro.com/articles/2014/08/a-uk-shale-gale-coming http://www.ogj.com/articles/print/volume-111/issue-8/exploration-development/vast-resource-estimated-in-uk-s-bowland-hodder.html http://www.shale-gas-information-platform.org/areas/the-debate/shale-gas-activities-in-britain-results-of-a-bgs-decc-study-on-the-bowland-and-hodder-shales-in-the-north-of-england.html https://michellespaul.wordpress.com/2013/07/11/ten-reasons-why-the-uk-shale-gas-boom-is-not-all-it-is-fracked-up-to-be/ http://www.ogj.com/articles/print/volume-111/issue-8/exploration-development/vast-resource-estimated-in-uk-s-bowland-hodder.html
what is bowland hodder shale