Pacific Rubiales provides update on oil discovery in the Bilby-1 exploration well, Karoon blocks, offshore Santos Basin, Brazil

TORONTO, May 13, 2013 /PRNewswire/ - Pacific Rubiales Energy Corp. (TSX: PRE; BVC: PREC; BOVESPA: PREB) provided today an update on the oil discovery in the Bilby-1 exploration well, drilling on block S-M-1166, in the Santos Basin, offshore Brazil.

The Bilby-1 well was drilled as part of an agreement announced by the Company on September 18, 2012, as a minimum work commitment for five offshore blocks (S-M-1101, S-M-1102, S-M-1037, S-M-1165 and S-M-1166), where the Company holds a 35% participating interest (subject to approval by Brazil's Agência Nacional do Petróleo, Gás Natural e Biocombustíveis ("ANP")).

As announced in an update by the operator of the blocks, Karoon Gas Australia Ltd. (ASX: KAR) (see www.karoongas.com.au), the potential size of the earlier announced oil discovery in the Bilby-1 well has been expanded, with a proven oil column of 320 metres (1,050 feet), confirmed by wireline pressure data and sampling of oil from the identified reservoir interval. One of seven oil samples recovered indicates the presence of 33° API quality oil in the reservoir. 

The net oil bearing reservoir based on petrophysical logs is estimated to be 70 metres (230 feet) with porosities up to 23%.  The confirmed stratigraphic extent of the oil bearing reservoirs now includes interbedded sands in the Eocene, Paleocene and Maastrichtian (Late Cretaceous) age rocks.

The Bilby-1 well is positioned approximately 150 metres (492 feet) down dip from the trap crest as indicated on seismic data, creating potential for additional prospectivity higher in the structure.

Ronald Pantin, Chief Executive Officer of Pacific Rubiales commented: "Although we are in early exploration stages in Brazil, we are pleased with the results to date and our partnership with Karoon. Further appraisal wells will be required, but it is encouraging to have discovered oil trapped in two separate structures, in the earlier drilled Kangaroo-1 well and now in the Bilby-1 exploration well."

With the wireline testing of the discovery now completed the well will continue drilling ahead as planned to an expected measured depth of 4,573 metres (approximately 15,000 feet), to test additional targets in the deeper Santonian (Cretaceous) interval.

Pacific Rubiales, a Canadian company and producer of natural gas and crude oil, owns 100% of Meta Petroleum Corp., which operates the Rubiales, Piriri and Quifa heavy oil fields in the Llanos Basin, and 100% of Pacific Stratus Energy Colombia Corp., which operates the La Creciente natural gas field in the northwestern area of Colombia. Pacific Rubiales has also acquired 100% of PetroMagdalena Energy Corp., which owns light oil assets in Colombia, and 100% of C&C Energia Ltd., which owns light oil assets in the Llanos Basin. In addition, the Company has a diversified portfolio of assets beyond Colombia, which includes producing and exploration assets in Peru, Guatemala, Brazil, Guyana and Papua New Guinea.

The Company's common shares trade on the Toronto Stock Exchange and La Bolsa de Valores de Colombia and as Brazilian Depositary Receipts on Brazil's Bolsa de Valores Mercadorias e Futuros under the ticker symbols PRE, PREC, and PREB, respectively.

Advisories

Cautionary Note Concerning Forward-Looking Statements

This news release contains forward-looking statements. All statements, other than statements of historical fact, that address activities, events or developments that the Company believes, expects or anticipates will or may occur in the future (including, without limitation, statements regarding estimates and/or assumptions in respect of production, revenue, cash flow and costs, reserve and resource estimates, potential resources and reserves and the Company's exploration and development plans and objectives) are forward-looking statements. These forward-looking statements reflect the current expectations or beliefs of the Company based on information currently available to the Company. Forward-looking statements are subject to a number of risks and uncertainties that may cause the actual results of the Company to differ materially from those discussed in the forward-looking statements, and even if such actual results are realized or substantially realized, there can be no assurance that they will have the expected consequences to, or effects on, the Company. Factors that could cause actual results or events to differ materially from current expectations include, among other things: uncertainty of estimates of capital and operating costs, production estimates and estimated economic return; the possibility that actual circumstances will differ from the estimates and assumptions; failure to establish estimated resources or reserves; fluctuations in petroleum prices and currency exchange rates; inflation; changes in equity markets; political developments in Colombia, Guatemala or Peru; changes to regulations affecting the Company's activities; uncertainties relating to the availability and costs of financing needed in the future; the uncertainties involved in interpreting drilling results and other geological data; and the other risks disclosed under the heading "Risk Factors" and elsewhere in the Company's annual information form dated March 14, 2012 filed on SEDAR at www.sedar.com. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Although the Company believes that the assumptions inherent in the forward-looking statements are reasonable, forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.

In addition, reported production levels may not be reflective of sustainable production rates and future production rates may differ materially from the production rates reflected in this news release due to, among other factors, difficulties or interruptions encountered during the production of hydrocarbons.

Translation

This news release was prepared in the English language and subsequently translated into Spanish and Portuguese. In the case of any differences between the English version and its translated counterparts, the English document should be treated as the governing version.

SOURCE Pacific Rubiales Energy Corp.

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