"The banks haven't been falling over themselves to lend money to oil companies there recently, rather the reverse, and [the Brexit vote] could compound that I'm afraid," he told City A.M. today.
Read more: Oil major BP has brushed off Brexit backlash
He added that it would increase pressure on the government to elevate exploration in the North Sea. "If we’re going to be an island we need as much control over energy supply as possible."
Others warned that Brexit's impact on the ability of banks to lend to the energy sector would be felt worldwide.
"As a result of Brexit European banks have been under pressure ... accessing debt for new [oil and gas] projects may become more difficult," Stephane Foucaud, an analyst at oil brokerage First Energy Capital, said.
Both believe the immediate impact of Britain's decision to leave the EU would be minimal, as the North Sea's fate is much more tied to oil prices.
Crude burst to life today, mimicking a rebound across financial markets on reduced fears of contagion from last week's surprise result.
Brent crude, the global benchmark, jumped 2.01 per cent to $48.11 per barrel this evening. Its US counterpart, West Texas Intermediate, swelled 2.22 per cent to $47.36.