Wentworth Resources : Limited : Tanzania: MB-4 Drilling Update

PRESS RELEASE
17 June 2015

WENTWORTH RESOURCES LIMITED

("Wentworth" or the "Company")

Tanzania: MB-4 Drilling Update

Wentworth, the Oslo Stock Exchange (OSE: WRL) and AIM (AIM: WRL) listed independent, East Africa-focused oil & gas company, is pleased to announce the completion of drilling operations at the MB-4 development well in the Mnazi Bay Concession, southern Tanzania.

The MB-4 development well, drilled to a total depth of 2,788 meters (True Vertical Depth Sub Sea) and is located approximately 800 meters from the MB-2 and MB-3 wells in the Mnazi Bay gas field, has crossed Miocene gas reservoirs with net pay of 24 meters (Upper Mnazi Bay) and 43 meters (Lower Mnazi Bay) respectively, both ranked among the best of the five wells drilled in this field to date. Pressure measurements have confirmed the lateral and the vertical connectivity of each reservoir.

Within this well two reservoirs have been selectively tested at different two-hour stabilised flows with the Upper Mnazi Bay achieving a constrained flow-rate of up to 18.8 mmscf/day and the Lower Mnazi Bay of up to 22.2 mmscf/day. The table below shows the test results:

The well will be connected to the production facilities which are currently being installed in the field, for start-up in Q3 2015. These results confirm the Mnazi Bay gas field's ability to produce output over and above the initial 80 mmscf/day, possibly up to 130 mmscf/day.

MB-4 well was deepened to the Oligocene where it encountered high-pressure intervals of unknown origin.

Wentworth has a 31.94% net interest in this well, which was operated by Maurel et Prom.

Geoff Bury, Managing Director, commented:

"We are extremely pleased with the outcome of the MB-4 well as the result confirms our reservoir model for the Mnazi Bay gas field. The success of the well not only provides further confirmation of the value of our discovered reserves in Mnazi Bay, but also provides additional flexibility for meeting gas delivery obligations agreed in our Gas Sales Agreement. We look forward to the start of production in the third quarter as a transformational step for the Company."

-Ends-

About Wentworth Resources

Wentworth Resources is a publicly traded (OSE:WRL, AIM:WRL), independent oil & gas company with: natural gas production; midstream assets; a committed exploration and appraisal drilling programme; and large-scale gas monetisation opportunities, all in the Rovuma Delta Basin of coastal southern Tanzania and northern Mozambique.

Wentworth holds a 31.94% participation interest in production operations and a 39.925% participation interest in exploration operations of the Mnazi Bay Concession. M&P is operator and holds a 48.06% participation interest in production operations and 60.075% participation interest in exploration operations with Tanzania Petroleum Development Corporation ("TPDC") holding the remaining 20% participation interest in production operations.

Gerold Fong, Vice President of Exploration (BSC Geophysics, 1982) who has 31 years of experience in the exploration and production industry, has read and approved the technical disclosure in this regulatory announcement.

Cautionary note regarding forward-looking statements

This press release may contain certain forward-looking information.  The words "expect", "anticipate", believe", "estimate", "may", "will", "should", "intend", "forecast", "plan", and similar expressions are used to identify forward looking information.

The forward-looking statements contained in this press release are based on management's beliefs, estimates and opinions on the date the statements are made in light of management's experience, current conditions and expected future development in the areas in which Wentworth is currently active and other factors management believes are appropriate in the circumstances. Wentworth undertakes no obligation to update publicly or revise any forward-looking statements or information, whether as a result of new information, future events or otherwise, unless required by applicable law.

Readers are cautioned not to place undue reliance on forward-looking information. By their nature, forward-looking statements are subject to numerous assumptions, risks and uncertainties that contribute to the possibility that the predicted outcome will not occur, including some of which are beyond Wentworth's control.  These assumptions and risks include, but are not limited to: the risks associated with the oil and gas industry in general such as operational risks in exploration, development and production, delays or changes in plans with respect to exploration or development projects or capital expenditures, the imprecision of resource and reserve estimates, assumptions regarding the timing and costs relating to production and development as well as the availability and price of labour and equipment, volatility of and assumptions regarding commodity prices and exchange rates, marketing and transportation risks, environmental risks, competition, the ability to access sufficient capital from internal and external sources and changes in applicable law.  Additionally, there are economic, political, social and other risks inherent in carrying on business in Tanzania and Mozambique. There can be no assurance that forward-looking statements will prove to be accurate as actual results and future events could vary or differ materially from those anticipated in such statements. See Wentworth's Management's Discussion and Analysis for the year ended December 31, 2014, available on Wentworth's website, for further description of the risks and uncertainties associated with Wentworth's business.

Notice

Neither the Oslo Stock Exchange nor the AIM Market of the London Stock Exchange has reviewed this press release and neither accepts responsibility for the adequacy or accuracy of this press release.