Oilex Drills Ahead in India's Cambay Field, Testing Continues

Oilex has advised that Cambay-73, the third well in the Cambay Field appraisal program, is drilling ahead having set intermediate casing at a depth of 1,600 meters. A workover rig has been mobilized to the location of Cambay-19Z and is rigging up to continue testing hydrocarbon-bearing intervals identified in the deeper Basal EP IV oil zone.

Cambay-19Z appraisal well

  • Objectives: Primary: Basal EP IV - oil
  • Eocene EP III and EP IV - oil
  • Secondary: Oligocene OS II - gas
  • Miocene Basal Sandstone - gas
  • Deccan Fractured Basement - oil

Status: A workover rig has been mobilised and is rigging up on site. Monsoonal flooding limited access to the site, however rigging up  is now nearing completion.

Operations: Testing operations are likely to commence within the next 2 - 5 days.

DST #2 will be carried out over a potential oil zone similar to the Basal EP IV. The test interval will comprise an additional 29 meters of perforations over a number of separate zones of variable thickness between 1,990 - 2,068 meters.

Comment: The Basal EP IV zone is present in at least three old wells on the Western High Block. These old wells were either not tested or were poorly evaluated and appear to have a similar log response to the zone that was successfully tested in Cambay-19Z. Preliminary indications from seismic and the analogous well logs are that the Basal EP IV may extend across the Western High Block.

Cambay-73 appraisal well

  • Objectives: Primary: Oligocene OS II - gas
  • Eocene EP III and EP IV - gas
  • Basal EP IV - oil
  • Secondary: Miocene Basal Sandstone - gas
  • Deccan Fractured Basement - oil
  • Status: Spud: 03:00 hrs 25 July 2008
  • Current Depth: 1,600 meters
  • Total Depth (TD): 2,205 meters (planned)

Operations: Conditioned and circulated gas out of hole. Repaired rig. Run and cement 9 5/8' casing to 1,600 meters. Drill out in 8 1/2' hole.

Comments: Cambay-73 is a vertical well that has been located to drill the OS II and EP III-IV primary objectives on the crest of the structure near to the fault that separates the Western High Block from the Basin Gas Area.

The well is also designed to intersect the Basal EP IV oil zone on the Western High Block at a favorable structural location.

Participants in the Cambay Production Sharing Contract are:

Joint Venture Party Participating Interest

  • Oilex Ltd (Operator) 30%
  • Oilex NL Holdings (India) Limited (100% owned by Oilex 15% Ltd)
  • Gujarat State Petroleum Corporation 55%