Source: Heritage Oil
The Miran West-2 appraisal well, which spudded on November 26, 2009 in the Kurdistan Region of Iraq, has reached a current depth of 2,627 meters and encountered hydrocarbon-bearing intervals totaling approximately 1,800 meters within Cretaceous formations. An extensive coring program of approximately 250 meters was undertaken in the well.
This appraisal well is being drilled within a part of the Miran West structure where it now appears the fracture network is less well developed. This variability in fracture development is consistent with the carbonate reservoirs throughout the region. This resulted in no hydrocarbons being flow tested to surface from the interval within Miran West-2 equivalent to that successfully tested in Miran West-1. However, having undertaken wireline logging, three zones from within a deeper Cretaceous interval have been identified for testing once drilling operations have been completed.
The well will now be deepened to approximately 4,600 meters to explore further potential in the underlying Jurassic and Triassic structures. These targets have been identified from additional seismic data acquired in January 2010, after the Miran West-2 well had commenced drilling. These exploration targets have the potential to contain substantial volumes of additional hydrocarbons. It is expected that drilling will take a further four to five months, following which the well will be tested.
Heritage is planning to acquire 3D seismic data over the Miran Block to enable further appraisal drilling to encounter the fracture networks more efficiently. The Miran West-1 well has previously demonstrated that where open fractures are encountered in wells the reservoir will support potential production rates of approximately 10,000 bopd.
Future plans for the drilling of the Miran East-1 exploration well are progressing, and Heritage is looking to contract a rig for later this year.
"The further hydrocarbon potential in the deeper targets in the Miran structure has the potential to increase resources significantly,” said Tony Buckingham, CEO of Heritage Oil. “We look forward to undertaking a testing program when drilling has been completed to fully appraise the extensive hydrocarbon intervals."
Heritage Energy Middle East, a wholly-owned subsidiary of Heritage, is operator and holds a 75% interest in the Miran Block and Genel Energy International Limited the remaining 25%, although there are third party back-in rights. The Miran Block has an area of 1,015 square kilometers and is located west of the city of Suleimaniah.