Tethys Oil AB, partners in the onshore Block 04 (Ghunaim) licence in the east of Oman, reported in its first quarter 2018 report that drilling the new field wildcat, Tibyan 1, resulted in a small oil discovery. The well is located approximately 9 km southwest of the Erfan 1 discovery and close to the Shahd field in the Huqf Arch of the Oman Basin. Tethys commented that Tibyan 1 is a small discovery contributing only a modest reserve contribution and as a result, it will be appraised and put on production quickly. It is assumed that the well discovered oil in the Precambrian Khufai (and/or Buah) Formation(s).  Erfan 1 (spudded in November 2016), had reached a total depth of 2,548 m in Q1 2017 and flowed oil to surface from the Khufai Formation. In Q2 2017, the discovery was successfully appraised by Erfan 2 which exhibited good oil flows to surface. Both wells were hooked up to the existing blocksâ (03 and 04) production system for long-term testing and appraisal.  In March 2013, exploration well B4EW4 1 in Block 04 was completed as a production well and was placed on long-term production test. Early production testing was designed to evaluate the Khufai and Buah reservoirs and Tethys reported a combined flow rate of close to 3,000 b/d of oil on a 36/64â choke. It has been assumed that the field (now Shahd) commenced commercial production early in 2014.  Block 04 (Ghunaim) is situated in the east of Oman and the licence covers an area of approximately 23,200 sq km. CC Energy Development S.A.L. (Oman) Ltd operate Block 03 (Afar) and Block 04 with a 50% interest, the remaining interests are held by Tethys Oil (30%) and Mitsui E&P Middle East B.V. (20%).
Oman (Huqf Arch (Oman B.)) Erfan 1