Production at the Horse Hill oil site in Surrey fell by 25% in May 2020, according to the most recent figures released by regulators today.
Data from the Oil & Gas Authority (OGA) showed that oil from the site, previously nicknamed the “Gatwick Gusher”, dropped by more than 200 tonnes compared with the total for April.
The May figure, at 736 tonnes, or 177 barrels a day, was also below the level of March 2020. That was the first available production figure from the OGA and, according to the site’s main investor, UK Oil & Gas, was not for a full a month. (First official Horse Hill oil production data)
In May 2020, Horse Hill just held on to its fourth-place ranking for tonnage of oil produced onshore in the UK. The site’s monthly total was half a tonne higher than the fifth placed field, the IGas-operated Stockbridge in Hampshire.
Today’s data also showed that water production from Horse Hill rose dramatically in May 2020 to 87.6 tonnes. This was up from 0.9 tonnes in both March and April 2020.
DrillOrDrop asked UK Oil & Gas (UKOG) for an explanation for May’s fall in oil and increase in water production at Horse Hill. The company has not responded to our questions.
The OGA data is based on information reported by field operators. The figures for Horse Hill date from the grant of consent for long-term production on 12 March 2020.
UKOG had made statements about the level of oil production from the first well at the site, called HH-1, before the formal consent was granted.
The company’s interim accounts for the six months to March 2020 said HH-1 had “continued producing at high rates of over 300 bopd almost continuously”.
In the same document, released in June 2020, UKOG said it had installed a “higher capacity and energy efficient linear rod pump” on HH-1 after the end of the accounting period. This led to “increased production from the Portland interval”, it said.