BG Group, a UK-based oil and gas exploration and production company, has made a gas discovery at the Kamba-1 well, offshore Tanzania.
According to Ophir Energy, a partner in the discovery, the Kamba-1 well in Block 4 has resulted in gas discoveries of 1.03TCF in the Kamba and Fulusi prospects. BG operates the Block 4 licence and Ophir holds a 20% interest. The well was drilled by the Deepsea Metro I drillship in a water depth of 1,379m to a total depth of 3,969m with the twin objectives of intersecting the Paleocene-aged Fulusi prospect (a northern extension of the earlier Pweza discovery) and the primary target of the Cretaceous-aged Kamba prospect.
The Kamba-1 well encountered an 18m gross gas column in the Fulusi prospect and, after sidetracking to test the Kamba prospect, the Kamba-1ST well established another gas column of 140m with high net to gross, good quality, reservoir sands.
The well has encountered better quality reservoir sands than prognosed pre-drill and further analysis is expected to confirm discovered volumes somewhat in excess of the pre-drill estimated mean (2C) recoverable resources of 1.03TCF, comprised of 650bcf in Kamba and 380bcf in Fulusi.
The Kamba-1 discovery is the Joint Venture’s 16th consecutive discovery well in Blocks 1, 3 and 4. This discovery, plus recent volume updates on the earlier discoveries, increases Ophir’s estimate of the total Block 1, 3 and 4 mean (2C) recoverable resource to 17.1TCF. The Kamba-1 result provides critical mass for an LNG train to be supplied from the fields in Block 4 and also takes the overall resource volume to the threshold for a future potential third LNG train to be from Blocks 1 and 4.
The Kamba-1 well represents the Joint Venture’s final well in this current drilling campaign. The Deepsea Metro I drillship will remain in Tanzania and now moves to drill two operated wells for Ophir in the East Pande and Block 7 PSCs.
Nick Cooper , CEO, commented: “The Kamba discovery has now confirmed sufficient aggregate resource in Block 4 to supply one 5MMTPA train of LNG. In combination with the discovered resource in Block 1, the Block 1 and 4 Joint Venture is now close to the threshold resource volumes for three 5MMTPA LNG trains.”
Ophir has said it will imminently spud the Tende-1 well on the East Pande licence.
Ophir operates the East Pande licence and holds a 70% interest, the East Pande PSC is located between the coast and the significant gas discoveries in Blocks 1 and 2.The Tende-1 well is on trend with the recent Taachui-1 discovery in Block 1 at a water depth of 680m and will be drilled to a planned total depth of 4,200m. The well is targeting gas in a lower Cretaceous sandstone reservoir with a mean prospective resource estimate of 2.38TCF at a 15% chance of success. Drilling operations are expected to take approximately 35 days.