August 28, 2017

SINTANA ENERGY INC. COMPLETES SALE OF VMM-4 BLOCK INTEREST

TORONTO, ONTARIO--(Marketwired - Aug. 28, 2017) - Sintana Energy Inc. ("Sintana") (TSX VENTURE:SEI) is pleased to announce that it has completed the sale of its 15% participation interest in the VMM-4 Block in Colombia for US $275,000. This successful sale is a major step in Sintana's ongoing initiative to monetize non-core assets. Proceeds will primarily be used for obtaining professional services associated with regulatory compliance requirements.

The VMM-37 Block in Colombia's Magdalena Basin remains Sintana's core asset. Hydraulic stimulation of the Manati Blanco-1 well, the initial well on this Block, is the prime focus of management's attention. Obtaining an environmental permit for this activity is the next major milestone in the exploration program for this 43,000 gross acres asset.

ABOUT SINTANA ENERGY:

The Company is engaged in petroleum and natural gas exploration and development activities in Colombia's Magdalena Basin. Sintana's exploration strategy is to acquire, explore, develop and produce superior quality assets with significant reserve potential.

On behalf of Sintana Energy Inc.,

Douglas G, Manner, Chief Executive Officer

For additional information or to sign-up to receive periodic updates about Sintana's projects, and corporate activities, please visit the Company's website at www.sintanaenergy.com

Forward-Looking Statement

This news release contains certain forward-looking information and statements within the meaning of applicable securities laws. The use of any of the words "expect", "anticipate", "continue", "estimate", "may", "might", "will", "project", "should", "believe", "plans", "intends" and similar expressions are intended to identify forward-looking information and/or statements.

Forward-looking statements and/or information are based on a number of material factors, expectations and/or assumptions of Sintana which have been used to develop such statements and/or information but which may prove to be incorrect. Although Sintana believes that the expectations reflected in such forward-looking statements and/or information are reasonable, undue reliance should not be placed on forward-looking statements as Sintana can give no assurance that such expectations will prove to be correct. In addition to other factors and assumptions which may be identified herein, assumptions have been made regarding, among other things: Sintana's future plans for operational expenditures; the accuracy of the estimates of resource volumes and interpretations of drilling activity results; availability of financing and/or cash flow to fund current and future plans and expenditure; the impact of increasing competition; the general stability of the economic and political environment in which Sintana has participation interests; the general continuance of current industry conditions; the timely receipt of any required regulatory approvals; the ability of Sintana to obtain qualified staff, equipment and/or services in a timely and cost efficient manner; the ability of the operator of each project in which Sintana has participation interests to operate in a safe, efficient and/or effective manner and to fulfill its respective obligations and current plans; future commodity prices; currency, exchange and/or interest rates; regulatory framework regarding royalties, taxes and/or environmental matters in the jurisdictions in which Sintana has participation interests; and the ability of Sintana to successfully market its oil and/or natural gas products.

The forward-looking information and statements included in this news release are not guarantees of future performance and should not be unduly relied upon. Such information and/or statements, including the assumptions made in respect thereof, involve known and unknown risks, uncertainties and other factors that may cause actual results and/or events to differ materially from those anticipated in such forward-looking information and/or statements including, without limitation: risks associated with the uncertainty of exploration results and estimates, inaccurate estimation of Sintana's oil and/or natural gas resource volumes, currency fluctuations, the uncertainty of conducting operations under a foreign regime, exploration risk, the uncertainty of obtaining all applicable regulatory approvals, the availability of labour and/or equipment, the fluctuating prices of oil and/or natural gas, the availability of financing and the Sintana's dependence on its management personnel, other participants in the property areas and/or certain other risks detailed from time-to-time in Sintana's public disclosure documents, (including, without limitation, those risks identified in this news release and Sintana's current management's discussion and analysis). Furthermore, the forward-looking statements contained in this news release are made as at the date of this news release and Sintana does not undertake any obligations to publicly update and/or revise any of the included forward- looking statements, whether as a result of additional information, future events and/or otherwise, except as may be required by applicable securities laws.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy and/or accuracy of this release.

Corporate Contact:
Sintana Energy Inc.
Douglas G. Manner
Chief Executive Officer
832.279.4913

Corporate Contact:
Sintana Energy Inc.
Sean J. Austin
Vice President
713.825.9591