La Cortez Announces Results of the Work-over Activity on the Mirto-1 Well in the Maranta Block

Increases net production to 150 bopd, an increase of 50% over the yearly average to date

Sep 12, 2011, 03:00 ET from La Cortez Energy, Inc.

BOGOTA, Colombia, Sept. 12, 2011 /PRNewswire/ -- La Cortez Energy, Inc. (OTC: LCTZ), is pleased to provide the following operational update on the work-over activity conducted on the Mirto-1 well.

Maranta Block – Mirto Field

As previously announced, the work-over on the Mirto-1 well was initiated on August 8th, 2011, with the objective to initiate a long-term production test on the Villeta N sand, which is the same zone that is producing in the Mirto-2 well. The work-over operation was completed on August 23rd, and the well was immediately put on production with the following initial results during the period from August 23rd to September 10th: Average gross production before royalties was 334 bopd of 15 degree API oil, with an average Base Sediment and Water (BS&W) of 1.5%. The well is producing by Electro Submersible Pump (ESP), and is stabilizing at 820 psi (flowing pressure at the ESP inlet) which is the expected pressure needed to maintain current production levels. Production on September 10th increased to 343 bopd (gross before royalties) with an average (BS&W) of 0.5%, indicating a continuous reduction in the water cut as expected for this particular reservoir. The well will be placed on long-term production testing with the purpose of monitoring production behavior as well as to gather additional technical data.

The Mirto-2 well continues producing with an average rate of 484 bopd for the year (gross before royalties), and with an average BS&W of 0.7%. The well continues producing from the Villeta N sand with flow pressure stable at 1065 psi, indicating the potential to increase the ESP frequency in order to maintain production levels closer to 500 bopd.

Current production from the Mirto-1 and Mirto-2 wells is 756 bopd gross before royalties, or 151 bopd net (before royalties) to the company, an increase of more than 50% over the year to date average.

Andres Gutierrez, President and CEO of La Cortez, commented on the announcement, "We are very pleased with the initial results obtained from the work-over on the Mirto-1 N sand. The additional production represents a significant increase in net production to the company, and will give us the opportunity to further assess the results of the work-over, and work closely with Emerald Energy Plc. (the operator of the block) to finalize plans for future exploration activity on the block as well as to determine the production potential from the Villeta formation - U sand in the Mirto field."

About La Cortez Energy, Inc.

La Cortez Energy, Inc. is an early stage oil and gas exploration and production company currently pursuing a business strategy in the energy sector in South America, with an initial focus on identifying oil and gas exploration and production opportunities in Colombia. To that end, the company has established a branch, La Cortez Energy Colombia, Inc., with offices in Bogota, Colombia, and has signed a Joint Operating Agreement for a 50% working interest in the Putumayo 4 block and a Joint Venture agreement for a 20% working interest in the Maranta block. The assignment of the working interest in both blocks, Maranta and Putumayo-4-is subject to approval by the Agencia Nacional de Hidrocarburos (ANH). La Cortez has acquired the interests of Avante Colombia, Inc. in the Rio de Oro and the Puerto Barco fields, all in Colombia.

For more information, please contact the Company's Investor Relations department at 941-870-5433 or by email

Forward-Looking Statements

Certain statements in this news release are forward-looking statements. These statements are subject to risks and uncertainties. Words such as "expects," "intends," "plans," "proposes," "may," "could," "should," "anticipates," "estimates," "likely," "possible," "potential," "believes" and words of similar import also identify forward-looking statements. Forward-looking statements are based on current facts and analyses and other information and assumptions of management. There can be no assurance that long-term production testing of the Mirto-1 well will be successful or that the Putumayo 4, Maranta and Rio de Oro and Puerto Barco projects will be successfully developed. Actual results may differ materially from those currently anticipated due to a number of factors beyond the reasonable control of the Company, including, but not limited to, the Company's ability to identify other corporate acquisition and/or joint venture opportunities in the energy sector in Colombia, Peru and Brazil and, more generally, in Latin America, and to establish the technical and managerial infrastructure, and to raise the required capital, to take advantage of, and successfully participate in such opportunities, future economic conditions, political stability and energy prices. Additional information on risks and other factors that may affect the business and financial results of the Company can be found in filings of the Company with the U.S. Securities and Exchange Commission.

SOURCE La Cortez Energy, Inc.