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Monumental Energy Announces Completion of Workover and Resumption of Commercial Production at the Copper Moki-2 Oil and Gas Well in New Zealand

Corporate Updates

Monumental Energy Announces Completion of Workover and Resumption of

Commercial Production at the Copper Moki-2 Oil and Gas Well in New

Zealand

VANCOUVER, British Columbia--(BUSINESS WIRE)--June 23, 2025--Monumental Energy

Corp. (“Monumental” or the “Company”) (TSX-V: MNRG; FSE: ZA6; OTCQB: MNMRF) is

pleased to announce the successful workover and resumption of commercial production at the

Copper Moki-2 (CM-2) well, located in the Taranaki Basin, New Zealand.

The primary objective of the CM-2 workover was to restore oil and associated gas production

from the Mt. Messenger sands and to address flow restrictions identified during prior operations.

Additionally, the program included perforating and testing previously untapped hydrocarbon

zones.

At CM-2, three new intervals have been perforated, which are expected to contribute to

significant flush production rates and increase overall output. Early indications confirm the new

pump is functioning as expected, with approximately 300 barrels of brine—previously used to

maintain pressure—successfully pumped out of the well.

The Copper Moki-1 (CM-1) workover is expected to take approximately 10 days. If successful,

the well will be placed on continuous production alongside CM-2. Monumental Energy and

NZEC anticipate significant flush production rates from both wells.

At the time of the original drill program at Copper Moki, New Zealand faced a gas surplus, and

the field remained isolated from the gas network. Today, the field has been fully integrated into

the gas infrastructure, presenting a meaningful revenue opportunity that was previously

unavailable.

CM-1 and CM-2 were originally shut-in due to mechanical issues over time, rather than any

reservoir-related concerns. The wells required only standard maintenance, and equipment

upgrades to resume production. In late 2024, Monumental Energy entered into an agreement

with NZEC to bring the wells back online, as NZEC shifted its focus to a gas storage business

model. Under the terms of the agreement, Monumental Energy will receive a 25% royalty on all

oil and gas production from the Copper Moki site, following full recovery of its 75% initial

capital contribution.

Oil produced in the Taranaki Basin typically receives a modest discount to Brent Crude (USD

$77.39 as of June 20), while natural gas sells at a premium, with current prices ranging between

USD $11.00 and $15.00 per MCF—significantly higher than North American market levels.

Cumulative production data, measured in barrels of oil equivalent (BOE), will be released in the

coming weeks.

Max Sali, Vice President of Corporate Development and Director, commented: “The

Copper Moki wells have demonstrated exceptional reservoir performance, with cumulative

production approaching one million barrels of oil to date. The successful recompletion of CM-

2—including the perforation of three new intervals—is expected to significantly enhance output.

We anticipate strong flush volumes and reservoir recharge, further validating the productivity of

the Mt. Messenger formation. This positions us for meaningful near-term cash flow while

supporting the long-term value proposition for our shareholders.”

About Monumental Energy Corp.

Monumental Energy Corp. is an exploration company focused on the acquisition, exploration,

and development of properties in the critical and clean energy sector, as well as investing in oil

and gas projects. The Company owns securities of New Zealand Energy Corp. and entered into a

call option and royalty agreement on the Copper Moki wells with New Zealand Energy Corp.

The Company also has an option to acquire a 75% interest and title to the Laguna cesium-lithium

brine project located in Chile. The Company holds a 2% net smelter return royalty on Summit

Nanotech’s share of any future lithium production from the Salar de Turi Project.

On behalf of the Board of Directors,

/s/ “Michelle DeCecco”

Michelle DeCecco, CEO

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 or accuracy

of this news release.

Forward Looking Information

This news release contains “forward‐looking information or statements” within the meaning of

applicable securities laws, which may include, without limitation, completing the Copper Moki 1

& 2 workovers and the expected results, the expected timeline to complete the workovers of

Copper Moki 1 & 2 wells, and commencement of production of CM 1 & 2, potential oil and gas

transactions, other statements relating to the technical, financial and business prospects of the

Company, its projects, its goals and other matters. All statements in this news release, other than

statements of historical facts, that address events or developments that the Company expects to

occur, are forward-looking statements. Although the Company believes the expectations

expressed in such forward-looking statements are based on reasonable assumptions, such

statements are not guarantees of future performance and actual results may differ materially from

those in the forward-looking statements. Such statements are based on numerous assumptions

regarding present and future business strategies and the environment in which the Company will

operate in the future, including the price of metals and the price of oil and gas, the ability to

achieve its goals, that general business and economic conditions will not change in a material

adverse manner and that financing will be available if and when needed and on reasonable terms.

Such forward-looking information reflects the Company’s views with respect to future events

and is subject to risks, uncertainties and assumptions, including the risks and uncertainties

relating to the interpretation of exploration results, risks related to the inherent uncertainty of

exploration and cost estimates and the potential for unexpected costs and expenses and those

other risks filed under the Company’s profile on SEDAR+ at www.sedarplus.ca. While such

estimates and assumptions are considered reasonable by the management of the Company, they

are inherently subject to significant business, economic, competitive and regulatory uncertainties

and risks. Factors that could cause actual results to differ materially from those in forward

looking statements include, but are not limited to, continued availability of capital and financing

and general economic, market or business conditions, failure to secure personnel and equipment

for work programs, adverse weather and climate conditions, risks relating to unanticipated

operational difficulties (including failure of equipment or processes to operate in accordance

with specifications or expectations, cost escalation, unavailability of materials and equipment,

government action or delays in the receipt of government approvals, industrial disturbances or

other job action, and unanticipated events related to health, safety and environmental matters),

risks relating to inaccurate geological assumptions, failure to maintain or obtain all necessary

government permits, approvals and authorizations, failure to obtain or maintain surface access

agreements or understandings from local communities, land owners or Indigenous groups,

fluctuation in exchange rates, the impact of viruses and diseases on the Company’s ability to

operate, capital market conditions, restriction on labour and international travel and supply

chains, decrease in the price of lithium, cesium and other metals, decrease in the price of oil and

gas, loss of key employees, consultants, or directors, failure to maintain or obtain community

acceptance (including from the Indigenous communities), increase in costs, litigation, and failure

of counterparties to perform their contractual obligations. The Company does not undertake to

update forward‐looking statements or forward‐looking information, except as required by law.

Contacts

Michelle DeCecco, Chief Executive Officer and Director

Email: [email protected]

Or

Maximilian Sali, VP Corporate Development and Director

Email: [email protected]

Phone: 1-604-367-8117