Others didn't care about the money the companies were set to make if oil was found, but wanted assurances over the long-term health of the land and rivers.
Apache's liaison officer Alex Ferguson said the companies would still have to satisfy the regional and district councils in Hawke's Bay before work could begin.
"These are the same questions, concerns and anxiety we hear from other areas and it is not surprising when you work in an area where there is less knowledge about what we are trying to do," Mr Ferguson said.
Mr Ferguson said initial studies suggested fracking or hydraulic fracturing - where fluid is injected at high pressure into rocks - might not be needed in Hawke's Bay.
"It would be great if we didn't have to do fracking but we can't say to everyone here that we're never going to do it," he said.
Mr Ferguson said before joining Apache he had worked in British Columbia where fracking had been used on many sites without any problems.
He said cases where fracking had not been "done correctly" had raised "the anxiety level" with the public.
"But it's that kind of anxiety and mistakes that forces the industry to pay more attention to these things because if it wasn't for this kind of pressure, companies wouldn't be pressured to do things better," Mr Ferguson said.