Prospex Energy Plc · LSE:PXEN
Prospex Energy — Investor Presentation (September 2026)
30 slides from Prospex Energy's investor presentation, Sep 21, 2026
Slide 1: Mniszow field development
Mniszow field development 21 September 2026 The Vistula river – Photo from Prospex scouting trip
Slide 2: Disclaimer
Disclaimer This document (Presentation) is the sole responsibility of Prospex Energy Plc (the Company) in connection with an investor update on the Company’s Polish San and Dunajec licences, and the Mniszow oil discovery. This Presentation has not been approved by an authorised person within the mea
Slide 3: Introduction to Prospex Energy
Introduction to Prospex Energy 3
Slide 4: Asset portfolio
Asset portfolio Multi-jurisdictional portfolio of assets providing strategic exposure to the European energy market with country diversification: San, Dunajec Licences, Poland • Po Valley, Italy. 37% non-operated interest in the Selva Malvezzi concession • Viura, Rioja, Spain. 7.24% non-operated int
Slide 5: Corporate investment case
Corporate investment case Prospex offers exposure to the following investment positives: • Extrinsic – rising tides which lift all boats • Real assets – commodities which hold value in currency terms during periods of inflation • Growing energy demand driven by digital infrastructure growth • Energy
Slide 6: San & Dunajec licences, Poland
San & Dunajec licences, Poland 6
Slide 7: San licence, Poland – gas prospectivity
San licence, Poland – gas prospectivity • Licence area 818 km2 • Miocene gas play only • Work Programme (WP): 3+2 years. Drill or drop commitment • 3 leads identified by PGI/MoE to be • Firm WP: 500km2 high-res Aerogravmag within 3 yr of award investigated by PXEN • Drilling 1 obligatory well up to
Slide 8: Dunajec licence, Poland – oil & gas prospectivity
Dunajec licence, Poland – oil & gas prospectivity • Licence area 1,182 km2 • Cretaceous Pinch-out and Jurassic • WP: 3+2 years. Drill or drop commitment. fracture reservoir oil & gas • Firm WP: 600km2 high-res Aerogravmag survey within 3 yeas of • Miocene turbidites gas play license award • Cenomani
Slide 9: Introduction to Mniszow
Introduction to Mniszow • First well with oil shows drilled in 1961 Grobla-1 (east of Mniszow South) that later lead to discovery of: Grobla (1962), Plawowice (1963) and later Mniszow (1966) fields • After discovery of Grobla & Plawowice accumulations primary focus was on developing those fields, wi
Slide 10: Data review and estimates
Data review and estimates • Prospex has reviewed the historic database and identified an initial view of potential oil in place and recoverable barrels • Updated estimate1 of STOIIP of 13.0 mmbbl • Updated estimate1 of Recoverable Reserves 3.7mmbbl • An 8 well programme, using modern drilling and co
Slide 11: Geological setting
Geological setting 11
Slide 12: Geological setting – oil play
Geological setting – oil play During the late Jurassic, The limestones in Poland Europe was covered by were deposited in the same shallow seas, which led to period (late Jurassic) and the deposition of form the reservoir of the limestones (e.g. Jura) oilfields in the Polish Carpathians Credit: Palae
Slide 13: Geological setting – Miocene gas
Geological setting – Miocene gas • Following the deposition of the limestones, the Carpathians continued to emerge. ` • In the late Cretaceous and tertiary, the basin changed into a foreland basin. The mountains load the underlying plate, causing it to flex, which creates a sedimentary basin. The su
Slide 14: Complete petroleum system chart
Complete petroleum system chart Source: Shales with high TOC, deposited primarily in the Devonian and late Silurian (Gliniak et al. 2004) Reservoir: Primarily the aforementioned limestones of Oxfordian age. Seal: Marls of Senonian age Generation of oil: As early as the Triassic, the source rocks had
Slide 15: Plawowice - adjacent field history
Plawowice - adjacent field history • Plawowice discovered in 1963 • OIIP 12 MMbbl Commercial production delivered from average thickness • Production to data c. 4.7 MMbbl to date lower than encountered at Mniszow (c. 10m thick Upper • Avg thickness 6.6m for the Upper Jurassic Jurassic limestone and
Slide 16: Grobla - adjacent field history
Grobla - adjacent field history • Grobla discovered in 1962 • OHIP 48 MMbbl & 9Bcf Proven commercial production in neighbouring reservoir bodies • Production to date > 20Mmbbl & 5 Bcf gas using basic vertical wells • Upper Jurassic limestone avg. thickness 20m We are approaching Mniszow as a product
Slide 17: Mniszow mapping & vol analysis
Mniszow mapping & vol analysis • Data from over 30 wells assessed Well shows and test results • Maps created based on existing stratigraphic information (well Water formation tops) • 18 wells with open hole logs • 13 wells with final well reports • In some cases only well basic technical sheet avail
Slide 18: Mniszow South E-W well correlation panel
Mniszow South E-W well correlation panel W E M-7: (692-708m) OH: (Acid job?) test flowed fluid with oil traces 9bbl/d. Oil in fractures G-24: (720-728m) CH: Acid job: long term production test: prod. 3024bbl (over 30 months) (DST ~7bbl/d) M-8 (750-755m) CH: brine inflow 22.5bbl/d with time brine + w
Slide 19: Mniszow South N-S well correlation panel
Mniszow South N-S well correlation panel S N M-10: (552- 578m) CH: Five G-29: (617- 642m) CH: Acid M-4: (637-673.7m) acid injections: job: oil inflow OH: Acid job: On tests rec. oil ~2bbl/d after Fractured lmst OIL traces:„water 24h~2.5bbl/d saturated. Tested: inflow followed (rec. 44bbl of no detai
Slide 20: Analogues – proven production
Analogues – proven production • Grobla and Plawowice adjacent oil and gas fields with >20 MMbbl and c. 5 MMbbl of oil respectively • In both offset fields HC bearing formations are upper Jurassic fractured carbonates overlayed by Cenomanian sands/conglomerates as in Mniszow • 100+ bbl/d natural prod
Slide 21: Salt Flat (Edwards) Field, Texas
Salt Flat (Edwards) Field, Texas Field history and modern intervention Production increase at Salt Field The Salt Flat field produces from a naturally tight limestone 100,000 reservoir that relies on fracture networks along the Luling fault 90,000 zone for permeability. The field has produced since
Slide 22: Outline Development Plan
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Slide 23: Development plan – phases
Development plan – 3 phases • Acquire 2D seismic To gain structural clarity on Mniszow field • Pilot well (Targeting Q4 2027) Core reservoir, acquire electrical & image logs Case to top of reservoir, drill out with coil tubing to deliver initial open hole lateral c. 400m or longer Retain option to p
Slide 24: Q1 2027: 2D seismic survey
Q1 2027: 2D seismic survey Planned seismic 2D lines locations Dunajec license outline Planned 2D seismic line Prospex plans to acquire the seismic in Q1 2027 so the data can be interpreted and used in final well planning Map shows initial seismic plan in blue & field outline in orange for both Mnisz
Slide 25: Development plan – pilot well
Development plan – pilot well Location of Mniszow X-1 vertical + lateral Cartoon of X-1 well vertical + lateral Rod pumps to enhance Map shows initial seismic plan in blue & rates well location shown on left with tophole and lateral section in areas of good seismic data control. Schematic shown on r
Slide 26: Mniszow – full field economics
Mniszow – full field economics Production build, three drilling campaigns Value build (€ million) • Production profile based on local & analogue field Core assumptions performance and the assumed application of stimulated, Oil price average €60/bbl ($70.5/bbl) lateral well design Initial well cost €
Slide 27: The path from here
The path from here 27
Slide 28: Project timeline
Project timeline Q4 ‘27 Q3 ’26 Q4 ‘26 Q1 ‘27 Q2 ‘27 Q3 ‘27 Finalise Mniszow Well programme Acquire 2D seismic materials & engage design and long data over Mniszow Permitting & land Drill 1st well on Prepare wellsite with investors lead commitments; field; access Mniszow well IMC Presentation Prelimi
Slide 29: Mniszow, a highly attractive development
Mniszow, a highly attractive development • Mniszow oil discovery mapped using significant body of historical data and analysis • Analysis of neighbouring fields shows that carbonate reservoir at Mniszow is a viable producer • International analogue developments demonstrates clear evidence of the pos
Slide 30: Questions…
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