Industry body Oil and Gas UK (OGUK) stuck to its impartial line on independence in its response to the survey, while politicians on both sides of the debate claimed it supported their respective causes.
A statement from OGUK said: “Oil & Gas UK, respecting the views of the Scottish electorate, will remain neutral and not express any preference for any particular outcome of the forthcoming Scottish independence referendum.
“Whatever the outcome in September, it remains vital both (Scottish and UK) governments continue to collaborate in order to maximise the economic activity of the oil and gas industry for the benefit of all involved.”
Scottish Energy Minister Fergus Ewing said the survey showed firms were “not fazed” by the prospect of independence, with 56% either positive about it or saying it would make little difference.
He added: “This is not the first time we have heard that North Sea investors are relaxed at the prospect of a Yes vote.
“Men and women who work in the industry showed overwhelming 70% support…in a poll conducted by (recruitment firm) Oil and Gas People earlier this year.
“To realise the North Sea’s full potential we need long-term predictability and stability for the industry, something successive UK governments have totally failed to achieve.
“An independent Scotland with full control of its economy and huge resources will offer an attractive and stable environment for businesses in the offshore and other sectors.
“By contrast, the bareboat charter tax ( a charge on unmanned rigs and vessels hired from outside the UK) is just the latest example of Westminster letting the industry down.”
Scotland Office Minister David Mundell said the survey highlighted the need for “certainty and stability” in the industry, which could only be guaranteed by a referendum No vote.
Mr Mundell added: “With the challenges facing the industry growing ever greater, being part of the UK and a larger, stronger and more stable economy means Scotland is in a position to get the most out of the oil and gas industry.
“Recent announcements of major investment and new job creation by BG Group, Maersk and Statoil – creating jobs and opportunities for Aberdeen and the north-east – reflect this.”
North-east Labour MSP Richard Baker said: “This is yet another significant intervention highlighting the big risks that come with separation.
“It is clear that uncertainty over currency if we leave the UK is forcing firms to delay investment in Scotland.
“The oil and gas sector is hugely important to the Scottish economy, but revenues from the industry are volatile and declining and can’t pay for everything.”