Horizontal drilling on the second oil exploration well at Horse Hill in Surrey is now underway, the main investor announced today.
The news came as opponents of operations at Horse Hill were preparing for a climate demonstration outside the site later this week.
UK Oil & Gas plc, which holds more than 85% of the Horse Hill oil field, said in a statement that drilling had been completed on the vertical section, called HH-2. Work on the horizontal section, known as HH-2z, had now begun.
UKOG said HH-2z would be drilled into what it described as the “Portland reservoir’s most oil productive zone or sweet spot”, to a total depth of around 5,900ft, by mid-November.
The company said “significant oil saturations and high permeabilities” observed in the core and logs from HH-2 indicated that this part of the formation was likely to have contributed most of the 29,568 barrels of oil produced during testing of the site’s other well, HH-1.
UKOG said the HH-2/2z well would be retained as a future production well. It was expected to be put into long-term production by the end of the year, the statement said.
The horizontal section of the well would be “geo-steered” during drilling to keep within a series of diagnostic geological markers to remain within the Portland sweet spot, the statement added.
UKOG’s chief executive, Stephen Sanderson, said:
“Our confidence in the HH-2z horizontal’s ability to deliver significant flow rates has been further boosted by the pilot well’s better than expected geological results.
“Our subsurface team’s focus is now firmly upon steering the well wholly within the target zone, the Portland sweet spot, demonstrably the most oil productive part of the reservoir. I have every confidence we can deliver the desired positive result.”
Opponents of drilling at Horse Hill are planning a demonstration at the site on Saturday 26 October.
The event is due to start at the junction of Horse Hill road and the A217 for speeches at 10.30am. This will be followed by a walk to the site for more speeches and tea and cake at the gate.
The organisers described the Horse Hill site as “the soon-to-be second largest oil site in the UK”.
“We all know the crisis we face if we continue to extract fossil fuels so we gather together to continue to sound the alarm.
“Bring banners, placards, friends, family. Bring any creative ideas, music, choirs, drummers.”
22 October 2019
UKOG announces start of horizontal drilling. Link
15 October 2019
UKOG announces completion of coring programme. Link
11 October 2019
UKOG says coring underway on HH-2. Link
8 October 2019
UKOG announces 9” casing is set and cemented 2,019ft below rig floor. Link
29 September 2019
Drilling HH-2 starts. Link
24 September 2019
Rig arrives at Horse Hill site to drill HH-2/2z. Link
18 October 2017
Surrey County Council approves planning permission for two more wells at Horse Hill. Live updates