Mozambique is a country in East Africa present between Tanzania on the north and South Africa in the south. A string of significant gas discoveries in the off shore north-east has substantially increased the prospectivity in the country and exploration activity looks set to pick up.
The country has two main sedimentary basins; the Rovuma Basin in the north east, where most of the discoveries have occurred, and the Mozambique basin further south. The Rovuma Basin is located close to the border between Tanzania and Mozambique, at the Rovuma delta, and measures 400 km in length and about 160 km in breadth. The area towards the south follows the Ibo horst trend and towards the north, it is featured as a tertiary Rovuma delta.
The Pande gas field, discovered by Gulf Oil, was the first field to be discovered in Mozambique, in 1961. This was followed by the Búzi (1962) and Temane (1967) gas fields. Exploration activity on the Pande/ Temane block by Sasol later led to the discovery of the Inhassoro gas field.
The consortium exploring the Offshore Area 1, led by Anadarko, has been the most successful so far with 4 significant gas discoveries. These are listed below:
Discovery Name | Net Pay (ft) | Gross Pay (ft) | Oil/ Gas | Total Depth | Date | Reservoir rock | Future Work |
Windjammer | 555 | > 1200 | Gas | 16,930 | Mar-2010 | Oligocene + Paleocene | Coring program completed (part of appraisal work) |
Collier | - | - | 10,500 | Apr-2010 | - | Plugged and suspended following pore pressure issues. Did not evaluate the desired section. | |
Ironclad | 124 | Oil | 17,402 | Aug-2010 | Cretaceous | Plugged and abandoned as sands had low porosity and permeability | |
Barquentine | 416 | Gas | 16,880 | Oct-2010 | Oligocene + Paleocene | Appraisal | |
Lagosta | 550 | Gas | 16,307 | Nov-2010 | Oligocene + Eocene | Coring program completed (part of appraisal work) | |
Tubarao | 110 | Gas | 13,900 | Feb-2011 | Eocene | Appraisal |
Table 1: Windjammer, Barquentine, Lagosta and Tubarao encountered substantial gas. The Ironclad well is significant because it encountered an oil column (although non-commercial), which was the first time oil was discovered in offshore Mozambique or in the deep offshore off East Africa.Source, Derrick Petroleum Services.
Source: Wentworth Resources
An overview of exploration activity planned in the country is provided in the table below, along with an account of recent exploration from Derrick Petroleum’s “Exploration Database” is provided below.
Block/ License Name | Operator | Onshore/Offshore | Hydrocarbon | Wells planned in 2011 | Wells planned in 2012+ |
Offshore Area 1 | Anadarko | Deep Offshore | Gas | 1 | 6 |
Onshore Rovuma Block | Anadarko | Onshore | Not mentioned | 1 | |
Buzi Block | Energi Mega Persada | Onshore | Gas | 1 | |
Inhaminga | DNO International ASA (DNO) | Onshore | Not mentioned | 1 | |
Blocks 2 & 5 | StatoilHydro | Deep Offshore | Not mentioned | ||
Area 4 | ENI | Deep Offshore | 1 |
Table 1: Operators planning to drill exploration wells in Mozambique in 2011 and 2012+. Source, Derrick Petroleum ‘Planned Wells Exploration Database’
Offshore Area 1:
Anadarko is the operator of the 2.6-million-acre Offshore Area 1 with a 36.5% working interest. Co-owners in the area are Mitsui E&P (20 %), BPRL (10 %), Videocon Mozambique Rovuma 1 (10 %) and Cove Energy Mozambique Rovuma Offshore (8.5 %). Empresa Nacional de Hidrocarbonetos, E.P.'s 15- interest is carried through the exploration phase. An overview of the recent exploration activity in this area is given in Table 1, and the 4 discoveries can be seen in Map 1.
Anadarko is the operator of the 2.6-million-acre Offshore Area 1 with a 36.5% working interest. Co-owners in the area are Mitsui E&P (20 %), BPRL (10 %), Videocon Mozambique Rovuma 1 (10 %) and Cove Energy Mozambique Rovuma Offshore (8.5 %). Empresa Nacional de Hidrocarbonetos, E.P.'s 15- interest is carried through the exploration phase. An overview of the recent exploration activity in this area is given in Table 1, and the 4 discoveries can be seen in Map 1.
The consortium is planning to acquire 3D seismic over the Black Pearl prospect in Q1-Q2 2011, following which exploratory drilling would occur. In 2012, the consortium plans to drill the Atum-1, Golfinho-1, Linguado, Badejo-1, Camarao and Black Pearl prospects.
Onshore Rovuma Block:
Anadarko (37.5%) operates this block and the partners are Maurel & Prom (24%), Wentworth Resources Ltd (15.3%), Cove Energy Plc (10%) and ENH (15%). On October 11, 2009 the first exploration well on the block, Mecupa-1,was spudded. It had minor gas shows and was plugged and abandoned.
Anadarko (37.5%) operates this block and the partners are Maurel & Prom (24%), Wentworth Resources Ltd (15.3%), Cove Energy Plc (10%) and ENH (15%). On October 11, 2009 the first exploration well on the block, Mecupa-1,was spudded. It had minor gas shows and was plugged and abandoned.
At present (July 2011), the partners have agreed to enter a 2nd exploration phase beginning in 2011. The work programme is expected to include additional seismic acquisition and at least one exploration well.
Buzi Block:
This onshore block is operated by Energi Mega Persada (75% WI) and partner is ENH (25%). The Buzi block is located onshore within the central part of the Mozambique Basin and covers approximately 10,300 km2 and lies immediately to the North of the Pande, Temane and Inhassoro Gas fields. The undeveloped Buzi gas discovery within the block, is only 27 km to the southwest of Beira. Initial plans included two exploration wells and possibly two appraisal probes, should gas be discovered. This is yet to be done.
This onshore block is operated by Energi Mega Persada (75% WI) and partner is ENH (25%). The Buzi block is located onshore within the central part of the Mozambique Basin and covers approximately 10,300 km2 and lies immediately to the North of the Pande, Temane and Inhassoro Gas fields. The undeveloped Buzi gas discovery within the block, is only 27 km to the southwest of Beira. Initial plans included two exploration wells and possibly two appraisal probes, should gas be discovered. This is yet to be done.
The consortium was planning to spud its first well on the block in 2011 as announced in 2009. However, as on 30 June, 2011, no information about drilling has been released by either of the partners.
Inhaminga Block:
The Inhaminga Block lies onshore Mozambique. DNO International (34% WI) operates the block and partners are New Age Ltd (41%), Harmattan Uruguay S.A., and the Mozambique government (20%). DNO International has planned to carry out 2D seismic program on the block in H2 2009. The first prospect Chite was drilled on 19 November, 2010. However, the well was dry and was plugged and abandoned. The second well Inhaminga High-1 well was spudded in Feb 2011, and was also dry.
The Inhaminga Block lies onshore Mozambique. DNO International (34% WI) operates the block and partners are New Age Ltd (41%), Harmattan Uruguay S.A., and the Mozambique government (20%). DNO International has planned to carry out 2D seismic program on the block in H2 2009. The first prospect Chite was drilled on 19 November, 2010. However, the well was dry and was plugged and abandoned. The second well Inhaminga High-1 well was spudded in Feb 2011, and was also dry.
DNO says in its 2010 annual report that it plans to drill a well here in 2011. However, media reports mention that DNO will close down its operations in Mozambique after drilling unsuccessful wells.
Blocks 2&5:
Blocks 2 & 5 are located in the Rovuma basin offshore northern Mozambique, and operated by Statoil (90% WI) with partner ENH (10%). A 1,300 sq km 3D seismic survey was carried out between March & June 2010 and interpretation is ongoing as of March 2011. The decision to extend the license and commit to drilling an exploration well was supposed to have been made by 1 June 2011, but as on 1 July, this decision is still forthcoming.
Blocks 2 & 5 are located in the Rovuma basin offshore northern Mozambique, and operated by Statoil (90% WI) with partner ENH (10%). A 1,300 sq km 3D seismic survey was carried out between March & June 2010 and interpretation is ongoing as of March 2011. The decision to extend the license and commit to drilling an exploration well was supposed to have been made by 1 June 2011, but as on 1 July, this decision is still forthcoming.
Area 4:
ENI operates the block with a 70% WI. Other partners are Galp Energia (10%), ENH (10%) and KOGAS (10%). Area 4 is located in deep water up to a depth of 2,600 metres in the Rovuma Basin and covers an area of 17,646 sq kms in a previously unexplored geological basin, and this operation is part of Eni's strategy to identify new areas with a high exploration potential.
ENI operates the block with a 70% WI. Other partners are Galp Energia (10%), ENH (10%) and KOGAS (10%). Area 4 is located in deep water up to a depth of 2,600 metres in the Rovuma Basin and covers an area of 17,646 sq kms in a previously unexplored geological basin, and this operation is part of Eni's strategy to identify new areas with a high exploration potential.
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