Marathon Abandons Annapolis Well Offshore Nova Scotia

Marathon Oil Company recently experienced and contained a well-control event caused by an influx of gas at the company's Annapolis deepwater exploratory well offshore Nova Scotia. The Annapolis B-24 well is located 350 kilometers (215 miles) south of Halifax in 1,740 meters (5,700 feet) of water.

Drilling of the well was suspended on March 24 when the gas influx occurred at an intermediate well depth of 3,500 meters (11,469 feet). Drilling was immediately stopped and the well was brought under control without incident. Following a detailed analysis of both the event and the condition of the well bore, the company has elected to plug and abandon the Annapolis B-24 well for mechanical reasons.

Marathon is currently working with its project partners to evaluate alternatives for further drilling on the Annapolis prospect in order to examine its potential, and a decision is expected shortly. Marathon holds a 30-percent interest in the Annapolis prospect and serves as operator. The remaining interests are held by EnCana Corporation (26 percent), Norsk Hydro Canada Oil and Gas Inc. (25 percent), and Murphy Oil Company Limited (19 percent).