Build the project once. Model every scenario.

Model the full economic life of a petroleum asset, from exploration through abandonment. Change assumptions, compare deterministic and probabilistic cases, and apply source-referenced fiscal logic across Asia-Pacific.

Book a Demo View the workflow ↓

MERIDIANEVALUATE

Exploration → abandonment·Full-distribution economics

Aster Gas ProjectIllustrative project

Each bar changes one input around the selected case. Dashed outlines retain base-case sensitivity; result tiles compare scenario NPV with the base case. Every sensitivity uses a separate full-model calculation. Values are nominal AUD million, after tax, discounted at 10% to 1 January 2027. Gas price ±A$2/GJ, sales-volume profile ±10%, initial development CAPEX ±A$48m, fixed field OPEX ±A$1.2m/year. Sustaining CAPEX, closure and variable OPEX are held fixed in the respective cost tests.
Assumption	Lower-input NPV	Higher-input NPV
Gas price±A$2.00/GJ	212.3	483.4
Sales volume±10%	288.1	407.5
Development CAPEX±A$48m	382.2	313.4
Fixed OPEX±A$1.20m/year	354.6	341.1

Lower inputHigher inputBase sensitivity

Gas price · A$/GJ11.00

Dev. CAPEX · A$m240.0

NPV10 · A$m0.0 vs base347.8

After tax · nominal AUD · valued at 1 Jan 2027

Project workflow

From project definition to decision output.

Assumptions, calculation conventions, fiscal treatment, economics, uncertainty and scenario history stay in one model.

01 / 04

Project definition

Define the project.

Define production, commercial terms, CAPEX, OPEX, timing and ownership in one project.

Production · profiles, resources and timing
Commercial · pricing, currency and ownership
Cost · CAPEX, OPEX and development timing

02 / 04

Financial model start2027-01-01

First production2029-01-01

Model life · years17

Discount rate · %10

Native calculation gridMonthly

CurrencyAUD

Discount conventionMid-period · actual days / 365.25

Calculation conventions · fiscal regime

Apply your calculation conventions and fiscal regime.

Use your organisation’s discounting, escalation, depreciation, capitalisation and rounding conventions, with the applicable fiscal regime and source material alongside the calculation.

Applied consistently · the same conventions follow every scenario
Regime status · current, historical or policy case
Sources · legislation, contract terms and effective dates

03 / 04

Project economics

Run the economics and uncertainty on the same model.

Period cash flow, fiscal outcomes and decision metrics trace back to the assumptions that produced them. Uncertain drivers run through the same calculation as distributions.

Period economics · revenue, cost, tax and net cash flow
Decision metrics · value, return, funding and fiscal outcomes
Uncertain drivers · production, price, CAPEX and schedule carried through as ranges
Distribution output · NPV and IRR ranges, funding exposure and threshold probabilities
Retained basis · sampled assumptions and calculation version remain attached to the distribution

FrequencyCumulative probability

1,000 valid simulationsCumulative: P(NPV ≤ x)

P10 NPV · DOWNSIDE

170.9AUDm

10% of valid results fall below this

P50 NPV · MEDIAN

228.3AUDm

50% non-exceedance

P90 NPV · UPSIDE

279.3AUDm

90% non-exceedance

PROBABILITY OF LOSS

0.0%

1000 valid results · 0 failed

04 / 04

BASE CASE NPV

225.3AUDm

SCENARIO NPV

287.5AUDm

CHANGE VS BASE

+62.3AUDm

Base-case NPVIncreaseDecrease

Scenario comparison

Branch assumptions and compare cases.

Test concepts, timing, price decks, fiscal regimes and ownership as alternative cases, while retaining the source and version history.

Branch · keep the existing case intact
Compare · economic and probabilistic consequences side by side
Trace · result → assumption → fiscal rule → citation

Phased development

Several fields. One development.

Give each field its own production method and commissioning date. Combine the phases in one forecast, then test a timing change without moving the rest of the development.

Aster NorthInitial development—1 Jan 202924.0 TJ/d

Aster CentralFirst tie-in—1 Jul 203018.0 TJ/d

Aster EastSecond tie-in—1 Jan 203215.0 TJ/d

Aster SouthExpansion—1 Jan 203412.0 TJ/d

Combined developmentTJ/d · field gross

Asia-Pacific fiscal coverage

Asia-Pacific fiscal regimes are built into EVALUATE.

Each available calculator carries its effective dates and interpretation alongside the project calculation. The coverage catalogue identifies the calculation evidence separately from mapped regimes.

118Mapped fiscal configurations

7Petroleum fiscal calculator families

5Australian state royalty systems

Australia13 configurationsCommonwealth offshore petroleum — standard PRRT · WA standard petroleum royalty regime · South Australian petroleum fiscal regime

Indonesia5 configurationsLater-generation cost-recovery PSC · Gross Split PSC — 2017/2020 generation

Malaysia10 configurationsRevenue-over-Cost PSC

New Zealand3 configurationsCurrent petroleum permit — AVR/APR regime

Thailand5 configurationsThai I concession · Thai III concession — including Special Remuneratory Benefit

Papua New Guinea6 configurationsStandard Oil and Gas Act petroleum-licence regime

View full fiscal coverage →

EVALUATE modules

Extend the same project economics into delivery and financing.

STAGE and CAPITAL use the EVALUATE project economics.

Project delivery

MeridianSTAGE

Connect the programme to the economics.

Move, delay or resequence work and see the effect on first production, funding and value.

Schedule · Dependencies · Stage gates · Economic consequence

Explore STAGE →

Financing & asset management

MeridianCAPITAL

Apply the capital structure to the project economics.

Compare debt service, covenant headroom and funding shortfall before you agree to a structure.

Debt · Equity · Hybrids · Acquisitions · Divestments

Explore CAPITAL →

See EVALUATE in action

Bring your project. See the economics built in real time.

Bring a project. We’ll build it, change it and compare the cases in a 30-minute EVALUATE demo.

Book a Demo