ADX Energy Vienna Basin Well Work Delivers 35% Production Surge

ADX Energy Vienna Basin Production Increase from Well Work Delivers 35% Surge

ADX Energy Ltd (ASX: ADX) has reported an approximate 75 BOEPD (barrels of oil equivalent per day) increase in Austrian production following a behind pipe perforation program on two existing wells in its 100% owned Vienna Basin fields. According to the ASX announcement, this ADX Energy Vienna Basin production increase from well work has lifted total net Austrian production by 35% to approximately 285 BOEPD, highlighting a production and cash flow uplift achieved without drilling new wells.

The update positions ADX Energy Ltd as a producer using existing well stock and installed infrastructure to pursue production growth with relatively modest incremental capital.

What Happened and Why It Matters

The ASX release confirms that a program of behind pipe perforation was carried out on two producing wells, GA-10A and GA-93, in the Gaiselberg and Zistersdorf fields in the Vienna Basin, around 70 kilometres northeast of Vienna in Lower Austria.

The work program focussed on:

• Re-entering existing production wells
• Perforating additional hydrocarbon-bearing intervals that had not been produced previously
• Tying the additional production into existing facilities

According to ADX Energy Ltd, the program delivered:

• Additional 24 BOPD (barrels of oil per day) from the GA-10A oil well
• Additional 52 BOEPD (gas) from the GA-93 gas well
• An increase in Vienna Basin production from approximately 150 BOEPD to 220 BOEPD
• An increase in total net Austrian production (including the Anshof Field in Upper Austria) to approximately 285 BOEPD, a 35% uplift

These production volumes are reported as being currently delivered following completion of the work program.

Production Impact Summary

For investors, the announcement demonstrates that ADX Energy Ltd is using lower-cost operational activity rather than large-scale capital projects to pursue production growth in Austria.

What Is Behind Pipe Perforation and Why Does It Matter to Investors?

The central technical element in this update is behind pipe perforation. Understanding this technique helps explain how ADX Energy Ltd has increased production without drilling new wells.

Definition in Accessible Terms

Behind pipe perforation refers to opening up additional oil or gas bearing zones that already exist behind the steel casing of a producing well but have not yet been connected to the wellbore.

In practice, this usually involves:

• Running tools into an existing well
• Creating holes (perforations) through the steel casing and cement at a selected depth interval
• Allowing oil or gas from that rock layer to flow into the wellbore
• Bringing the additional fluid to surface using the existing production system

The key feature is that the well already exists. The operator does not drill a new wellbore from surface, which can be capital intensive. Instead, previously unperforated intervals are brought into production.

Why It Matters Financially

From an investment perspective, behind pipe perforation can be important because:

• Capital expenditure is typically far lower than for a new well
• Work is carried out on existing well locations and facilities
• Time from operation to first incremental production can be relatively short
• Successful interventions can extend field life and support reserve recovery

In the case of ADX Energy Ltd, the company reports that a two-well behind pipe program has delivered an approximate 35% uplift in total Austrian production. That scale of uplift, achieved from existing wells and linked directly into installed infrastructure, can be material for a company of ADX's size.

Key Terms Explained

To support accessibility for non-specialists, the following terms are used in the announcement:

• BOEPD (barrels of oil equivalent per day)
  A unit that combines oil and gas production into a single measure. Gas is converted into a notional barrel equivalent based on energy content.

• BOPD (barrels of oil per day)
  A measure of liquid crude oil production only.

• Behind pipe
  A description used when hydrocarbon-bearing rock is known to sit behind the steel casing of a well but has not yet been perforated to flow into the wellbore.

• Infill drilling
  Drilling new wells within an already developed field, typically between existing wells, to increase overall recovery of oil or gas.

• Workover
  A set of operations on an existing well aimed at maintenance, repair or production enhancement, commonly without drilling a new well.

These concepts are central to ADX's current strategy in the Vienna Basin fields and relevant to investors assessing how the company plans to grow production with controlled capital deployment.

The Vienna Basin Asset: A Closer Look

The Vienna Basin fields, Gaiselberg and Zistersdorf, are described in the ASX announcement as the focus of ongoing production operations for ADX Energy Ltd in Austria. The company holds a 100% equity interest in these fields, which means reported production and associated revenues are not shared with joint venture partners.

Key characteristics of the Vienna Basin fields include:

• 18 active wells in operation
• Liquid processing capacity above 4,000 BPD, indicating spare capacity relative to current production levels
• Less than 1% royalty, identified by the company as a very favourable fiscal term
• High value sweet crude oil priced at Brent equivalent levels
• Gas sold at Central European Gas Hub prices, reported as approximately EUR 48/MWh or US$16.5 per MMBTU at the time of the announcement
• Connection by pipeline to the OMV refinery near Vienna and to the local gas grid
• Low emission, low decline production profile, which ADX Energy Ltd suggests is suited to longer-term cash flow
• A multilayer field that the company notes is also considered suitable for gas and hydrogen (H2) storage
• Ownership of 13.7 hectares of land with potential use for a solar park

The combination of low royalty, benchmark pricing for both oil and gas, and direct pipeline access means incremental barrels from the Vienna Basin can be economically important for ADX Energy Ltd, especially when delivered from low-cost interventions such as the reported behind pipe perforation program.

Management Commentary

The ASX release includes commentary from Executive Chairman Ian Tchacos that sets out management's view of the current result and future plans.

"The 35% increase in net Austrian production from the recent well work at our Vienna Basin fields is a positive outcome with further production growth identified from future work programs. Our local technical and operations team are evaluating further production enhancement opportunities including infill drilling and further behind pipe potential to increase production and reserves from the fields.

We are planning a potential new development well and an appraisal well to be drilled in 2027. New wells on the field can be tied into infrastructure immediately at minimal cost thereby enhancing cash flow and economic returns," said Ian Tchacos, Executive Chairman of ADX Energy Ltd.

This commentary links the current production uplift directly to future work programs, signalling that the behind pipe result is one element in a broader development plan.

What Comes Next: 2027 Drilling and Further Workovers

According to the announcement, ADX Energy Ltd has already started a broader program of behind pipe perforation and is also planning infill and appraisal drilling across the Vienna Basin fields.

Key planned or ongoing activities include:

1. Ongoing behind pipe and workover program

   • Evaluation of additional behind pipe potential in existing wells
   • Aim to increase production and improve profitability using low incremental operating costs

2. Infill and appraisal drilling program from 2027

   • Infill drilling is expected to target areas between existing producers
   • Appraisal drilling is intended to confirm and better define additional reserves

3. Potential new development well in 2027

   • Management indicates that a new development well and an appraisal well are being planned for drilling in 2027
   • New wells are expected to be tied into existing infrastructure at relatively low cost and quickly brought on line, subject to successful drilling

Planned and Ongoing Activities

For investors, this creates a line of potential catalysts, ranging from ongoing workover programmes to new wells that may contribute to production and reserves from 2027 onwards, subject to drilling outcomes.

Educational Section: How Workovers and Infill Drilling Support Mature Fields

The Vienna Basin announcement offers a useful case study of how mature oil and gas fields can continue to provide value through targeted operations.

What Is a Workover?

A workover is any significant intervention in an existing well designed to:

• Restore production if performance has declined
• Enhance production through new equipment, cleaning, or recompletion in new zones
• Repair mechanical issues with tubing, casing or downhole equipment

Workovers often involve:

• Bringing a workover rig or specialised unit to site
• Pulling existing tubing or equipment
• Running new tools or completion equipment
• In some cases, perforating new zones behind pipe

The cost of a workover is usually lower than the cost of drilling a new well, though it can still be technically complex. In the case of ADX Energy Ltd, the current announcement focuses on a specific type of workover activity, namely behind pipe perforation.

What Is Infill Drilling?

Infill drilling refers to drilling additional wells inside the boundary of a known field. It is used to:

• Access pockets of oil or gas that existing wells cannot reach effectively
• Improve recovery of hydrocarbons from the reservoir
• Maintain or increase production rates as older wells decline

In established fields, infill wells:

• Benefit from existing infrastructure such as roads, pipelines and processing facilities
• Often have lower unit development costs than frontier exploration wells
• Rely heavily on detailed subsurface mapping and reservoir understanding

The planned 2027 program for ADX Energy Ltd in the Vienna Basin fields fits this model, with infill and appraisal wells being planned within an existing producing area that already has spare processing capacity and pipeline connectivity.

Why These Techniques Matter in Mature Basins

For investors tracking producers in mature basins:

• Workovers and behind pipe perforations can add barrels at relatively low cost
• Infill drilling can extend field life and support stable or growing production profiles
• Existing infrastructure can reduce both capital and operating unit costs
• Fiscal terms and commodity pricing, such as the low royalty and Brent-equivalent pricing reported by ADX, strongly influence how attractive these barrels are

Furthermore, the Vienna Basin fields, as described by ADX Energy Ltd, match many of these characteristics, which is why the company emphasises the attractiveness of additional Vienna Basin production in the ASX release.

The Investment Case: Small Operational Change, Material Production Effect

The key investor takeaway from this announcement is the scale of production increase relative to the scope of activity.

From a two-well behind pipe perforation program, ADX Energy Ltd reports:

• An approximate 75 BOEPD total production increase
• A 47% uplift in Vienna Basin field production (from ~150 BOEPD to ~220 BOEPD)
• A 35% increase in total net Austrian production to approximately 285 BOEPD

For a company focused on operated assets in Austria, this change can influence:

• Near-term revenue, given Brent-equivalent oil pricing and Central European Gas Hub gas prices
• Field operating efficiency, as more barrels are processed through existing facilities
• The economic case for subsequent workovers and planned wells in 2027 and beyond

Additional factors noted in the ASX announcement that may be relevant for investors include:

• 100% interest in the Vienna Basin fields, so production and revenue are not shared with partners
• Less than 1% royalty, which supports field-level cash margins
• Existing capacity above 4,000 BPD, indicating room for further production growth within the current facility envelope
• Potential longer-term optionality associated with gas and hydrogen storage and solar park development on owned land, although these are not the focus of the current operational update

The technical and reserves information relating to Austria in the ASX release has been reviewed by Paul Fink, Technical Director of ADX Energy Ltd, a qualified geophysicist with approximately 30 years of industry experience and membership in the EAGE and FIDIC. This review provides an additional level of technical oversight for the reported data.

Why Investors Should Keep Watching ADX Energy Ltd

According to the 9 July 2026 ASX announcement, the ADX Energy Vienna Basin production increase from well work demonstrates that:

• A targeted behind pipe perforation program on two wells has delivered a reported 35% increase in net Austrian production
• The Vienna Basin fields, held at 100% equity, can respond to relatively low-cost operational activity
• A clear operational pipeline exists, including further behind pipe potential, planned infill drilling and new wells from 2027

For investors interested in smaller-cap energy producers, this update illustrates how production and cash flow profiles can be shaped by field-level technical work. The combination of low royalty, benchmark pricing and existing spare capacity in the Vienna Basin fields provides strong context for why ADX Energy Ltd is focussing on these assets to support its Austrian production base.

Want to Know More About ADX Energy's Austrian Production Growth?

ADX Energy (ASX: ADX) is demonstrating how targeted, low-cost well interventions can deliver material production uplifts from its 100%-owned Vienna Basin fields — with further workovers, infill drilling, and new development wells already in the pipeline for 2027. For investors looking to learn more about ADX Energy's Austrian assets, production strategy, and growth outlook, visit the company's official website at adx-energy.com.