Cuadrilla says it has promoted the first shale gas from its fracking site in Lancashire.
In a statement, Sky News said it was "significant and points to the potential of the shale".
"The volumes of gas returning to the surface at this time are low," said Francis Egan, Chief Executive Officer.
"However, considering that we are only at the beginning of the fracturing process and that under operational constraints we have not been able to inject as much sand into the shale as we had planned, this is a good early indication of the gas potential we have talked about it for a long time. "
After interruptions from bad weather and protests, work began on October 15 at the site, but was interrupted more than once due to shaking in the region.
Last Friday, the work was stopped in Little Plumpton 18 hours, when a 0.8 magnitude earthquake was recorded,
On Monday, a 1.1 magnitude earthquake forced another break.
Mr. Egan said, "This Preston New Road site is being monitored at an unprecedented level … If we can fully test these wells without compromising safety, we can make a major impact on UK energy and security and economic prosperity "
Cuadrilla uses the "traffic light system" of the UCI to monitor and access tremors.
If the magnitude of an earthquake is 0.5 or more, it is classified as "red light" and means that the work must be stopped immediately.
The site is Cuadrilla's first exploration site on British soil.
Earlier this month, Sky News was invited to witness the two wells starting fracking.
The work was stopped when an emergency order was submitted by a local activist at 11:00,
The concerns of the demonstrators include the contamination of drinking water and earthquakes.
Fracking had been suspended since 2011 after triggering two earthquakes – one that measures 2.3 on the Richter scale.
The company plans to fully test the flow rates from the two holes at the end of 2018 into the new year.
"This initial gas flow is by no means the end of the story," said Egan, adding that he early encouraged that the site "can provide a significant source of natural gas for the heating of Lancashire and British homes and offices and reduce our ever-growing reliance on expensive ones foreign imports ".
In hydraulic fracturing or fracking, gas is extracted from rocks by breaking it up with water and chemicals under high pressure.
Today's announcement said the company had begun to see natural gas explode from its shale exploration well.
They report that the gas was returned to the surface along with water recycled from the shale after a small section of the shale surrounding the first horizontal exploration well was hydraulically fractured.