OR/17/037 Appendix 4 - Temperature gradient

Hannis, S, and Gent, C. 2017. Petrophysical interpretation of selected wells near Liverpool for the UK Geoenergy Observatories project. British Geological Survey Internal Report, OR/17/037.

A temperature gradient of 28°C/km was used (with a ground level temperature of 10°C) was used in the software processing. This is equivalent to the red dotted line shown in Figure 13, sourced from Busby et al., 2011.

Figure 13    Temperature data for the wells in this study plotted with regional data. Pale blue arrows represent the correction of the maximum wireline recorded temperatures for the time since drilling mud circulation ceased. Data point and trend codes are listed in Table 15.

Table 15    Sources of temperature data in Figure 13

Well	Depth, m	Temp, °C	Comments/source
InceMarshes1	1453	43.33	FMI run
InceMarshes1	1453	43.33	Comp log header, Pex run, individual field prints used to find time since circ	Maximum recorded temp
InceMarshes1	1453	42.22	p20 of geological End of Well Report (EOWR)	Maximum recorded temp
InceMarshes1	1175.9	47.5	p9 of geological EOWR	flow line
Kemira1	1230.78	23.89	Log header, Density_neutron_run_2.pdf	No temp data in run 3 logs to 4708 ft. TVD max 6 deg at 4037 ft, no survey data reported. Assumed ‘vertical’
Kemira1	559.61	17.78	Log header, Density_neutron_run_1.pdf
Ince_cor	1453	65.51	Time since circ: 5.45 hrs. 3.30 11th dec to 9.16 11th dec	Simple method: http://www.zetaware.com/utilities/bht/timesince.html
Ince_cor	1453	53.86	Time since circ: 27.5 hrs. 3.30 11dec to 7.00 12dec
Kem_cor	1230.78	45.1	Time since circ: 6 hrs 47 mins. 16.00 13 feb to 22:47 13 feb
Kem_cor	559.61	39.4	Time since circ: 6 hrs 13 mins. 19:30 28 jan to 1:43 on 29th Jan
BusbyMaps	100	13	12–14 contour, Busby et al., 2011
BusbyMaps	200	17	16–18 contour, Busby et al., 2011
BusbyMaps	500	18.5	17–20 contour, Busby et al., 2011
BusbyMaps	1000	40	38–42 contour, Busby et al., 2011
BusbyGrad	0	10	Reported gradient for UK (abstract, Busby et al., 2011)
BusbyGrad	1000	38	Reported gradient for UK (abstract, Busby et al., 2011)