Sintana Provides Update on VMM-37 Joint Operating Agreement and Contract

TORONTO, April 18, 2023 (GLOBE NEWSWIRE) -- Sintana Energy Inc. (TSXV: SEI OTCQB: SEUSF) (the "Company" or "Sintana") reports that ExxonMobil sent Patriot Energy Oil and Gas Inc. ("Patriot"), a subsidiary of the Company, a notice stating that, based on the terms of the Joint Operating Agreement between ExxonMobil and Patriot (the "JOA"), it had decided to withdraw from the JOA as of May 31, 2023. The notice also states that ExxonMobil will withdraw from the Contract with the Agencia Nacional de Hidrocarbons (the "Contract"), effective after obtaining required Government approvals. Both the JOA and Contract pertain to the 43,158 acres property known as the VMM-37 block which is in Colombia's Middle Magdalena Valley Basin ("VMM-37").

Chief Executive Officer Doug Manner commented: "We are disappointed that our VMM-37 partner for more than a decade, ExxonMobil, has voluntarily chosen to withdraw from both the JOA and Contract. Management has engaged legal and technical advisors for assistance in addressing this unexpected change of events".

The Company fully reserves its rights under the contracts governing VMM-37 and applicable laws and regulations.

Further updates will be provided with respect to these matters as additional information becomes available.

About Sintana
The Company is engaged in petroleum and natural gas exploration and development activities in Colombia's Magdalena Basin and five large, highly prospective, onshore and offshore petroleum exploration licenses in Namibia. Sintana's exploration strategy is to acquire, explore, develop and produce superior quality assets with substantial reserves potential.

On behalf of Sintana Energy Inc.,
"Douglas G. Manner"
Chief Executive Officer

For additional information regarding Sintana and ongoing corporate activities, please visit the Company's website at www.sintanaenergy.com.

Corporate Contact:
Douglas G. Manner
Chief Executive Officer
Tel: 832.279.4913

Corporate Contact:
Sean J. Austin
Vice President
Tel: 713.825.9591

Investor Relations Advisor:
Jonathan Paterson
Founder & Managing Partner
Harbor Access
Tel: 475-477-9401

Forward-Looking Statements Certain information in this release are forward-looking statements. Forward-looking statements consist of statements that are not purely historical, including statements regarding beliefs, plans, expectations or intensions for the future, and include, but not limited to, statements with respect to the status of the JOA, potential rights and remedies in respect thereof and the prospective nature of the Company's property interests. Such statements are subject to risks and uncertainties that may cause actual results, performance or developments to differ materially from those contained in the statements, including, but not limited to risks relating to the receipt of all applicable regulatory approvals, results of exploration activities, the ability to source joint venture partners and fund exploration, permitting and government approvals, and other risks identified in the Company's public disclosure documents from time to time. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on forward-looking statements. The Company assumes no obligation to update such information, except as may be required by law.

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