NEWSROOM

TORONTO, May 27, 2013 /CNW/ - Pacific Rubiales Energy Corp. (TSX: PRE; BVC: PREC; BOVESPA: PREB) provided today an operations update on 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 Bilby-1 well has been drilled to a total depth of 4,416 meters (14,489 feet) in the late Cretaceous Maastrichtian section. No further zones of interest in addition to the light oil discovery previously announced in a news release on May 6, 2013, were encountered. Wireline operations in the well have been completed and the drilling rig is expected to be released later this week. All petrophysical data, oil samples and drill cores from the well will be analyzed in detail over the next several months.

The search for a suitable drilling rig for a multi-well follow-up appraisal program is currently ongoing.  This program is expected to include appraisal wells drilled on both the Kangaroo and Bilby exploration well oil discoveries.

Ronald Pantin, Chief Executive Officer of Pacific Rubiales commented:  "We have now completed the exploration well commitment on the Karoon blocks and are pleased to have made significant light oil discoveries in two of the three wells.  We are looking forward to the upcoming appraisal drilling program and our continuing partnership with Karoon."

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, Peru, Brazil, Papua New Guinea and Guyana; 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 13, 2013 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.