GSPC expects 400m barrels at Block 19 in Yemen

Vol 11, PW 23 (15 May 08) Exploration & Production
     

Gujarat State Petroleum looks set to reap substantial rewards in Yemen, where it is part owner and sole operator of three onshore blocks: Block 28, Block 57 and Block 19, for which PSCs were signed on April 13.

Of these three blocks, GSPC believes 8424-sq km Block 19, on the outskirts of the capital Sanaa in the Marib Basin, has the most potential. An audit carried out last year by UK-based reservoir consultant Gaffney, Cline & Associates forecast a prospective resource potential of 400m barrels at this block, based on three confirmed leads.

Block 19 is considered promising because it is surrounded on three sides by Block 18, the gas source for the Yemen LNG project, majority-owned by Total of France, which has 9-tcf certified gas reserves. GSPC has committed to shoot 800-km 2D, 400-sq km 3D and drill four wells each to 200 metres beyond basement in the 48-month Phase-I at Block 19.

In the optional 24-month Phase-II at Block 19, GSPC has committed to shoot 200-km 2D, 150-sq km 3D and drill three wells, each to 200 metres depth beyond basement. At 4465-sq km Block 28, in the Belhaf Basin, it will shoot 1000-km 2D, 200-sq km 3D and drill three wells, each to 200 metres beyond basement in Phase-I.

If the consortium enters Phase-II, it has committed to shoot 500-km 2D, 100-sq km 3D and drill three wells, each to 200 metres beyond basement. We hear that “discoveries in surrounding areas make this block prospective.

â€‌ Block 57, 10,963-sq km in the Rub al-Khali Basin bordering Saudi Arabia, is the largest of GSPC’s holdings in Yemen. However, it is purely exploratory, with no past hydrocarbon shows or significant seismic data.

GSPC will therefore conduct an aeromagnetic and gravity magnetic survey, shoot 1200-km 2D, 100-sq km 3D and drill three wells to 200 metres beyond basement in Phase-I. If results are encouraging the consortium will move to Phase-II, shooting 600-km 2D and 50-sq km 3D and drill three exploratory wells to 200 metres beyond basement.

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