OR/14/050 Dataset integration: Difference between revisions

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Latest revision as of 08:39, 5 April 2016

Monaghan, A A. 2014. Model metadata report for BGS - DECC shale study model, central and eastern Midland Valley of Scotland. British Geological Survey Internal Report, OR/14/050.

Borehole, well, seismic, mining, outcrop and selected parts of previous modelled data were combined to a single data file for each stratigraphic horizon (Table 4). Prior to that combination, each dataset was visually compared in GOCAD® and erroneous data or inconsistencies were identified and resolved. The main inconsistency resulted from the seismic depth conversion compared to well/borehole picks and mining information (the method of resolution is described in Seismic data).

Table 4    Summary of datasets integrated for each stratigraphic surface modelled
Surface/Gocad project name Borehole/well Ex-tent Out-crop line Mining data Seismic pick name Existing model Interpreted data
bULGS/top LSC bULGS_data.gprj Y Y Y Upper Hirst data (projected 200 m to bULGS) Top Limestone Coal.dat 220 m above bLSC assumed in Firth of Forth seismic picks but later edited to fit rockhead etc Margin of western Central Coalfield from McCormac (2013)[1]
bLSC/tLLGS bLSC_data.gprj Y deleted NS66NE4, NT39NW10N T08NW 254, NS98NE28 as inconsistent Y Y Mining data to base LSC using thicknesses as in Table 3 Top LowerLimestone. dat Margin of western Central Coalfield from McCormac (2013)[1]
bLLGS/tWLO bLLGS_data.gprj Y Rashiehill added manually. Not included Valleyfield shaft as near base but not at base Y Y n/a Base Lower Lmst.dat Central Fife small area from Monaghan (2013)[2]
bWLO/tGUL bWLO_data.gprj Y Y Y n/a (no depth data from shale workings) Base oilshales.dat, top Gullane fm.dat. Top volcanics in Levenseat area Cassem base Pittenweem Base Lawmuir Formation around western Central Coalfield from Millward and Stephenson (2011)[3] Manual edits around Carrington as seismic picks were not deep enough compared to well
bGUL/tvolcBGN bGUL_data.prj Y Y Y n/a Top Inverclyde.dat, Top Ballagan.dat, TopCPV lavas.dat Top volcanics.dat n/a Manual edits of seismic points around Carrington well. Seismic interpretation South Fod/Blackness goes beneath TD for bGUL, though bGUL is probably around the TD of the well

Appendix 1 - Model development log, lists in more detail the modelling projects created and actions taken.

References

  1. ↑ 1.0 1.1 MCCORMAC, M. 2013. Clyde Catchment GOCAD® bedrock regional model, 2013. British Geological Survey Internal Report, IR/13/014. 11pp.
  2. ↑ MONAGHAN, A A. 2013. Model metadata report for the Midland Valley of Scotland Regional Model 2012/13. British Geological Survey Internal Report, IR/13/013. 34pp.
  3. ↑ MILLWARD, D, and STEPHENSON, D. 2011. Bedrock GSI3D models from interpreted data in geologically complex Carboniferous terrains: A work in progress from the Clyde catchment area, Midland Valley of Scotland. British Geological Survey Internal Report, IR/11/052. 58pp.
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