Statoil makes high-impact gas discovery offshore Tanzania

The discovery of an additional 2 Tcf to 3 Tcf of natural gas-in-place at the Piri-1 well brings the total of in-place volumes up to approximately 20 Tcf in Block 2, offshore Tanzania.

“Since 2012, we have had a 100% success rate in Tanzania and the area has become a core exploration area in a very short period of time. We quickly went from drilling one well to a multi-well program, and with Piri-1 we are continuing the success,” said Nick Maden, senior V.P. for Statoil' s exploration activities in the Western Hemisphere.

The new gas discovery was made in the same Lower Cretaceous sandstones as the gas discovery in the Zafarani-1 well drilled in 2012.

The Piri-1 discovery is the venture' s sixth discovery in Block 2. It was preceded by the high-impact gas discoveries Zafarani-1, Lavani-1, Tangawizi-1 and Mronge-1, and a discovery in Lavani-2.

Piri-1 was drilled by the drillship Discoverer Americas. The well is two km southwest of the Lavani-1 well at 2,360 m water depth. The Discoverer Americas has now moved location and is currently drilling the Binzari prospect in Block 2.

“Additional prospectivity has been mapped and will be tested throughout 2014 and 2015. We expect to drill several additional exploration and appraisal wells and hope that the results from these wells will continue to add gas volumes for a future large-scale gas infrastructure development,” said Maden.

Statoil operates the license on Block 2 on behalf of Tanzania Petroleum Development Corporation (TPDC) and has a 65% working interest. Exxon Mobil Exploration and Production Tanzania Limited holds the remaining 35%. Statoil has been in Tanzania since 2007, when it was awarded the operatorship for Block 2.

Providing useful resources, articles and writings on crude oil, other petroleum products, energy and gas. By Giftelyon Multi-Sevices Int'l Ltd and services, UK, online.

Eni granted three new permits in Algeria

Eni has been granted three prospection permits by Sonatrach, the Algerian state company. The permits authorize Eni, as operator, and Sonatrach to carry out prospection activities in the basins of Timimoun and Oued Mya, in onshore southern Algeria.

The three permits (El Guefoul, Tinerkouk and Terfas), issued from the national agency for the exploitation of hydrocarbon resources (Agence Nationale pour la Valorisation des Ressources en Hydrocarbures, ALNAFT), are valid for two years and cover a total area of 46,837 sq km. The work program includes studies and drilling of prospection wells to define the potential of the areas. The three areas are considered of great interest and potential.

Eni has been present in Algeria since 1981 and has interests in 29 exploration and development licenses, which are currently in production, and in 3 permits under development. Eni is the leading international producer in the country, with daily equity production of approximately 125,000 boe.

Providing useful resources, articles and writings on crude oil, other petroleum products, energy and gas. By Giftelyon Multi-Sevices Int'l Ltd and services, UK, online.

Sunbird-1 oil zone verified offshore Kenya

Pancontinental Oil and Gas reported it has verified that the recently completed Sunbird-1 well off the southern Kenyan coast has intersected an oil column the first ever oil discovered off the East African coast.

The gross oil column is assessed to be 14 m thick beneath a gross gas column of 29.6 m in a reefal limestone reservoir in the Sunbird Miocene Pinnacle Reef in area L10A. The corresponding net values are 9.2 m for the oil zone and 28.3 m for the gas zone. The Sunbird Reef is an ancient Miocene pinnacle reef buried beneath approximately 900 m of younger sediment.

Pancontinental believes the results are highly significant because they are the first proof of the presence a prospective oil system in the Lamu Basin offshore Kenya. The oil and gas have been geochemically typed in detail and the prospective source rocks have been dated and characterised for use in future exploration.

Analysis of the Sunbird results has been complicated by the loss of drilling mud, seawater and remedial cement pumped into the limestone reservoir during drilling operations.

Pancontinental has an 18.75% interest in the well and block L10A. Pancontinental has three extensive exploration areas in this highly prospective Basin covering a total area of approximately 15,000 sq km, including L10A. The detailed oil and gas geochemical data, which are confidential to the L10A Joint Venture partners, give the age and type of the oil source rocks, as well as other crucial data that Pancontinental believes places the L10A Joint Venture in a leading position to find commercial oil offshore Kenya.

The Operator of the Block L10A Petroleum Sharing Contract, BG Group, is continuing to analyse the well data and will recommend a future exploration programme using the well results.

The top of the Sunbird Miocene Pinnacle Reef was reached at 1,583.7 m sub-sea. The water depth is 723 m. Below the upper oil and gas zone, indications of low Wet Gas saturation were seen, although these are not considered to be volumetrically significant. The age and depositional environment of the oil source rocks have been determined by geochemical analysis, and remain commercially confidential to the L10A Joint Venture.

The presence of oil is supported by geochemical analysis of MDT samples, the pressure gradient of MDT samples, numerical modelling of the invasion of the oil zone and also fluorescence attributable to oil in samples. The reservoir zone was heavily flushed during well control operations, making determination of the oil and gas zones difficult.

Porosity and permeability of the hydrocarbon zone were favourable overall, and were very high in parts of the reservoir as evidenced by the loss of a large volume of drilling fluid.

L10A Consortium:

The Kenya L10A consortium consists of: BG Group (Operator) 50.00%, PTTEP 31.25% & Pancontinental 18.75%.

Pancontinental increases interest in L10B. Pancontinental advises that it has increased its interest in licence L10B, immediately to the south of L10A. The increase in interest is subject to the completion of documentation; however Ministerial approval has already been given.

The Kenya L10B consortium now consists of : BG Group (Operator) 75.00% & Pancontinental 25.00%.

Providing useful resources, articles and writings on crude oil, other petroleum products, energy and gas. By Giftelyon Multi-Sevices Int'l Ltd and services, UK, online.