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Monumental Energy Announces Commencement of Copper Moki Workovers in New Zealand

Corporate Updates

Monumental Energy Announces Commencement of Copper Moki Workovers

in New Zealand

VANCOUVER, British Columbia--(BUSINESS WIRE)--May 20, 2025--Monumental Energy

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

pleased to announce that workover operations have commenced at the Copper Moki-1 and

Copper Moki-2 wells, located in the Taranaki Basin, New Zealand.

The workover program being carried out in conjunction with the Company’s partner, New

Zealand Energy Corp., involves re-entering both wells to perform downhole cleanouts, replace

tubing and rods, and perforate the Mt. Messenger formation. The objective is to restore

production from the Mt. Messenger sands and resolve known flow restrictions identified in

previous operations.

Additionally, the wells have never undergone a full tubing replacement or sand cleanout,

providing Monumental with the opportunity to perforate an unproduced zone. Having remained

idle for 18 months, the wells also present potential for a significant flush production increase,

further enhanced by the planned perforation of an additional 5-metre interval in the Mt.

Messenger formation.

Copper Moki-1 Workover Highlights:

 The well, drilled to a depth of 2,220-metres with 7” casing set at 2,214-metres, will be re-

entered to retrieve approximately 600-metres of parted sucker rods and remove wax and

sand buildup.

 A 5-metre interval of the Mt. Messenger formation, located at approximately 1,587

metres, will be perforated to access untapped hydrocarbon zones.

 New tubing, a tubing anchor, and a complete pump string will be installed to optimize

production efficiency.

 The well will be fully equipped with a pump and rod system, after which flow testing will

be conducted in preparation for a return to production.

Copper Moki-2 Workover Highlights:

 The 2,084-metre well will undergo similar operations to Copper Moki-1, including a full

tubing replacement and comprehensive well cleanout.

 A new pump and rod system will be installed to enable production from the newly

perforated zone.

 As with Copper Moki-1, well pressure is several hundred psi below hydrostatic,

suggesting favourable conditions for drawdown and early production.

Max Sali, Vice President of Corporate Development and Director, commented: "These

workovers represent a meaningful step toward monetizing the Taranaki Basin assets. With

infrastructure in place, we are well-positioned to restore production and potentially generate

early cash flow to support Monumental’s broader strategic objectives. We are also pleased to

have a newly upgraded rig on site, which is now fully operational and will enable the expedited

execution of future projects.”

Field operations are expected to be completed in the coming weeks, with initial production

results anticipated shortly thereafter. To date, the program remains under budget; Monumental

does not anticipate any further expenditures until the workover is complete and flush production

begins. Total spending to date is approximately NZD $560,000 (CAD $460,000).

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