Oil and gas company Northern Petroleum has discovered oil in the core regions of its Markwells Wood-1 well in the Sussex licence PEDL126, UK.

According to the company, the presence of mobile oil was observed when the 30ft of core was extracted from the well.

Initial analysis of the logs indicate that the well penetrated a gross hydrocarbon bearing interval of 275ft with a calculated net reservoir of 192ft with an average porosity of 13%-14%, a typical porosity value for this type of reservoir in the nearby fields.

The well was deviated at an inclination of approximately 56 degrees through the Great Oolite formation.

The top of the Great Oolite was encountered 51ft low to prognosis and the Great Oolite vertical thickness was 146ft compared to a prognosis of 240ft.

The analysis of the core is currently underway and that data will be integrated with the petrophysical evaluation and image logs to design the testing programs, the company said.

Northern Petroleum holds a 50% interest in the PEDL126 license and is its operator, while Magellan Petroleum and Egdon Resources hold 40% and 10% interests, respectively.