Angus Energy said today it expected to be ready to produce oil from a new sidetrack well at its Brockham site in Surrey by this spring or summer.
The company announced results of analysis of the well, called BR-X4Z, in a statement this morning. It said the thickness of the Kimmeridge limestone reservoir was similar to the thickness reported at the exploratory oil well at Horse Hill, near Gatwick Airport, eight miles to the south.
“Based on the evidence so far, Angus has confidence that the well will be similar to Horse Hill and perhaps given that the reservoir is potentially much thicker in zones not previously tested the results could be even better.”
The company said it was ready to install new production facilities for the Brockham well and to prepare for production as soon as it had approval from the Oil and Gas Authority.
“Targeted completion for production is in spring/summer 2017.”
The statement continued:
“Our professional team will shortly be meeting Surrey County Council to discuss the position in relation to the sidetrack and also to agree what further planning permissions are necessary in order to regularise the existing site cabins, fencing and associated structures.”
Surrey County Council has consistently told DrillOrDrop that the recent work at Brockham was a workover operation that was covered by a planning permission granted in 2007. The council said Angus did not have permission for horizontal or vertical drilling.
But the statement from Angus said the BR-X4Z sidetrack was drilled to 1,391m to evaluate the Portland, Corallian and Kimmeridge formations at Brockham. The sidetrack is marked on a map (see above) published by the OGA, with a spud date of 20 January 2017.
Paul Tresto, a DrillOrDrop reader and regular contributor, had this explanation for the apparent contradiction (see full comment below):
“They [Angus] used an existing wellbore and sidetrack drilled by BP in 1987, cleaned it out, isolated the sidetrack, logged the wellbore and ran and cemented production casing. The well was required to be renamed.”
According to Angus, the gross thickness of the Kimmeridge formation in Br-X4Z is 385m.
It said the company had used the Weatherford Ultra Wave Acoustic borehole imaging tool – the first time this had been deployed in Europe. The statement said this confirmed evidence of natural fractures in two main limestone intervals, previously tested at Horse Hill.
The tool also confirmed what Angus described as “abundant natural fractures” in sections of interbedded shales and limestones between and below the two main limestones.
The statement added that Br-X4Z had observed oil shows in the Portland and Corallian formations and the company was “confident of additional production from the Portland”.
The Angus Energy share price closed down slightly on the day at 12.25p.