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    Upstream News

    Petrobras makes additional discovery in Santos Basin

    Petrobras has confirmed the presence of oil in well 3-SPS-101 (3-BRSA-1179-SPS), in the Carioca Discovery Evaluation Plan area, block BM-S-9, Santos Basin pre-salt. The well, informally known as Iguaçu Mirim, is located 303 km off the coast of the state of São Paulo, 34 km south of the discovery well (1-SPS-50 - Carioca) and 9 km south of the Iguaçu well (4-BRSA-709-SPS), at a water depth of 2,158m.

    This new discovery was confirmed through oil samples of approximately 20° API, taken via cable test from pre-salt carbonate reservoirs starting at a depth of 4,850 meters.

    The consortium of BM-S-9 is operated by Petrobras (45%) in partnership with BG E&P Brasil (30%) and Repsol Sinopec Brasil (25%). The deadline for the Declaration of Commerciality is December 31, 2013.

    Total hits hydrocarbon pay in deepwater Gabon pre-salt

    French oil major Total, through Total Gabon and its partners, has hit hydrocarbon pay off the coast of Gabon. Marathon Oil, a partner with a 21.25% non-operated working interest in the Diaba License, noted August 19 that the pre-salt Diaman-1B exploration well offshore Gabon encountered 160-180 net feet of hydrocarbon pay in the deepwater pre-salt play. Preliminary analysis suggests that the hydrocarbons are natural gas with condensate content, pending results of ongoing analyses of well data. The Diaman-1B well was drilled to a total depth of 18,323 feet in approximately 5,673 feet of water in the Diaba License G4-223.

    The Diaman-1B successfully confirms the existence of a working petroleum system and is the first discovery drilled in the deepwater portion of the pre-salt play. Diaman-1B is located over 60 miles away from the nearest other pre-salt commercial discovery.

    The operator and partners are currently evaluating the well results and incorporating them into an overall evaluation of the Diaman-1B discovery. The well will be temporarily abandoned pending further analysis of the data.

    Total Gabon holds a 42.5% working interest and serves as operator of the Diaba License. In addition to Marathon Oil, partners include Cobalt International Energy LP (21.25% working interest) and Gabonese Republic (15% working interest).

    Statoil makes separate discoveries in Norwegian Sea

    Statoil has made two recent discoveries in the Norwegian Sea.

    Statoil, together with its PL479 partners, has made a gas/condensate discovery in the Smørbukk North prospect at Haltenbanken in the Norwegian Sea. Exploration well 6506/9-3, drilled by the drilling rig Transocean Leader, has proven a 40-meter gas/condensate column in a down-to situation in the Garn formation of mid-Jurassic age.

    In addition, a thin gas/condensate column was proven deeper in the mid-Jurassic Ile formation. The reservoir properties of the Garn formation are good, while somewhat poorer than expected in the Ile formation.

    The preliminary estimated volume of the discovery is in the range of 25-47 million barrels of recoverable oil equivalent.

    "We are very pleased with having proven the new resources," said Gro G. Haatvedt, senior vice president exploration Norway in Statoil. "The three discoveries comprising the Åsgard field were all made in the 1980s. Making a new discovery in the area 30 years later is encouraging and proves the exciting remaining potential on the Norwegian continental shelf."

    "Smørbukk North was a demanding well to drill, but, due to thorough planning and extra HSE focus, the operations have so far been carried out without serious incidents and are currently 21 days ahead of schedule," Haatvedt said.

    Exploration well 6506/9-3 is situated in PL479 in the Norwegian Sea. Statoil is operator with an interest of 40.95%. The partners are ENI Norge AS, 19.6%; Petoro AS, 14.95%; ExxonMobil Exploration & Production Norway AS, 14.7%; and Total E&P Norge AS, 9.8%.

    On August 15, The Norwegian Petroleum Directorate noted that Statoil Petroleum AS, operator for production license 159 C, made a small oil discovery near the Norne field in the Norwegian Sea. The company is in the process of completing drilling of the wildcat well 6507/3-10 that was drilled about 7.5 miles south of the field.

    The purpose of the well was to prove petroleum in reservoir rocks of the Middle and Early Jurassic Age.

    The well encountered an oil column in the Middle Jurassic of roughly 32 feet, as well as oil in a six-to-10-foot thin sand layer in the upper part of the Tilje formation.

    A preliminary estimate of the size of the discovery is under 6.3 million barrels of recoverable oil. Analyses will be made of the discovery to assess its commerciality.

    This is the first exploration well in production license 159 C, which was awarded in February 2008.

    Well 6507/3-10 was drilled from the Songa Trym drilling facility, which will be going to production license 128 in the Norwegian Sea to drill wildcat well 6608/10-15, where Statoil Petroleum AS is the operator.

    Ecopetrol finds hydrocarbons in Block CPO-10 in Meta

    Ecopetrol SA has discovered the presence of hydrocarbons in the Guainiz 1 exploration well located in the municipality of San Carlos de Guaroa, in the department of Meta, Colombia.

    The completion of the initial testing achieved an average daily production of crude oil of 409 barrels per day of 14.4 ° API and a water cut of 8.4%, through a system of progressive cavity artificial lift.

    This is the third finding of Ecopetrol in Block CPO-10, which adds to the Stingray and Cusuco discoveries announced in March and May 2013, respectively. The three are part of the exploration and production contract CPO-10 agreement between Ecopetrol and the National Hydrocarbons Agency on December 18, 2008.

    Drilling of Guainiz 1 began last June and ended on July 14, to a depth of 7,975 feet in Paleozoic rocks. Initial tests were made in the intermediate reservoir basal sands of Eocene age in a 16-foot perforated interval. In addition to success in the initial tests, positive results were also obtained in samples of fluid on top of the sandy package assigned to the Late Cretaceous.

    In the coming months Ecopetrol will analyze the results and will conduct further delineation drilling in Block CPO-10 with the aim of facilitating the entry into production of future fields.

    Eni makes mozambique discovery

    Eni has made a new high impact discovery at Agulha exploration prospect, in Area 4, offshore Mozambique.

    Preliminary estimates show that the Agulha structure could contain 5 to 7 trillion cubic feet (tcf) of gas in place. Eni and its Area 4 joint venture partners are finalizing the assessment of the discovery and planning the appraisal strategy.

    Agulha well, which led to the discovery, is the tenth well drilled back to back in Area 4, where exploration has achieved a 100% rate of success. Agulha was drilled in 2,492 meters of water and reached a total depth of 6,203 meters.

    The well is located in the southern part of area 4, approximately 80 kilometers off the Cabo Delgado coast, and was drilled to assess new exploration targets and to test the hydrocarbon potential of geological sequences which are older than the ones drilled in the Mamba complex.

    Agulha encountered about 160 meters of wet gas pay in good quality Paleocene and Cretaceous reservoirs.

    The discovery opens a new exploration play in the southern part of Area 4 where the drilling of three additional wells is foreseen in 2014.

    Eni is the operator of Area 4 with a 50% indirect interest owned through Eni East Africa, which holds 70% of Area 4. The other partners are Galp Energia (10%), KOGAS (10%) and ENH (10%, carried through the exploration phase). CNPC owns a 20% indirect participation in Area 4 through Eni East Africa.

    Senex, orca make OIL DISCOVERY in australia's cooper basin

    Orca Energy Ltd. made an oil discovery in the southern Cooper Basin permit PEL 115 with the Burruna 2 oil exploration well in South Australia.

    Wireline logs have confirmed a net pay interval in the mid Namur Formation of 17.4 feet (5.3 meters) and a subsequent drill stem test has resulted in oil free-flowing to surface at a rate of over 750 barrels per day with no associated water. Burruna-2 will be cased and suspended as a future oil producer.

    The well was drilled to a total depth of 6,286 feet (1,916 meters) by joint venture partner and operator, Senex Energy Ltd. and as per the sale agreement announced on June 13, Orca was free carried for all costs associated with drilling, casing and completing the well.

    Senex cut 59 feet (18 meters) of core through the Murta Formation, which will be analyzed for permeability, porosity and rock strength to aid in the design of production enhancement techniques. Free oil was observed with the recovered core and hydrocarbon fluorescence was noted over a gross interval of 46 feet (14 meters). This further confirms the potential of the regionally extensive Murta Formation across the newly formed "Fury Joint Venture" area (Orca 20%, Senex 80%) where recently Fury-1 tested a 59-foot (18-meter) gross oil column within the Murta Formation.


    Briefs

    Mozambique Liquids target comes up dry for Statoil

    The Statoil-operated Buzio-1 exploration well on Area 2 offshore Mozambique came up dry, Tullow Oil plc said September 2.

    The well follows the Cachalote-1, which encountered hydrocarbons, but not in commercial quantities, noted RBC Capital Markets analyst Peter Hutton, who continued to note that The Discoverer Americas drill ship may move to drill a fourth prospect in Tanzania, following earlier discoveries at Lavani, Zafarani and Tangawizi. Statoil is operator with 40% interest. Other companies include Tullow (25%), INPEX (25%) and ENH (10%).

    Oryx petroleum makes Elephant prospect discovery offshore Congo

    Oryx Petroleum made a discovery at its Elephant prospect offshore Congo-Brazzaville. The well, drilled by Jasper Explorer drillship to a total depth of 8,000 feet in 2,000 feet of water, encountered gross pay of 102 meters of gas and 46 meters of oil across two intervals in the Haute Mer A license. The company was targeting a deeper Tertiary play similar to adjacent fields in the license (Total's Moho Bilondo field and Chevron's Block 14 in Angola). Oryx will test the discovery in 2014 as part of a multi-well drilling campaign. Rig will now drill the H-1 well at the Horse prospect in the western part of the license.

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