Published on: 09 NOVEMBER 2011
Tullow Oil plc (Tullow) announces that the Montserrado-1 exploration well, offshore Liberia, has made a non-commercial oil discovery in Late Cretaceous reservoir sands.
This result is an important exploration breakthrough, establishing a working hydrocarbon system in the Liberian basin.
The well was drilled in block LB15 to a total depth of 5,400 metres and encountered good-quality, water-bearing sands in the main objective. In a deeper secondary objective, approximately 8 metres of hydrocarbon pay was intersected and a sample of light oil was recovered.
The well is being plugged and abandoned and the drillship is being mobilised to Sierra Leone to drill the Mercury2 appraisal well and the Jupiter exploration well on block SL07B11.
Tullow has a 25.00% working interest in the licence and is partnered by the operator, Anadarko Petroleum (47.5%) and Repsol (27.5%).
COMMENTING TODAY, ANGUS MCCOSS, EXPLORATION DIRECTOR, SAID:
“Whilst this wildcat well made a subcommercial discovery at this location, we have gained critical insights which we will now integrate with our extensive 3D seismic data for follow-up drilling in our highly prospective Liberian acreage. We now look forward to the drilling of the high-impact Jupiter and Mercury2 wells in Sierra Leone.”