Meridian Book a Demo

Petroleum decision software

Project inputs change constantly. Your outputs should too.

Change an assumption and EVALUATE recalculates the project economics. Fiscal logic, sources and uncertainty stay attached to the result.

MERIDIANEVALUATE
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$1.2m/year. Sustaining CAPEX, closure and variable OPEX are held fixed in the respective cost tests.
AssumptionNPV change · A$mLower-input NPVHigher-input NPV
Gas price±A$2.00/GJ
212.3483.4
Sales volume±10%
288.1407.5
Development CAPEX±A$48m
382.2313.4
Fixed OPEX±A$1.20m/year
354.6341.1
Lower inputHigher inputBase sensitivity
Gas price · A$/GJ11.00
Dev. CAPEX · A$m240.0
NPV10 · A$m0.0 vs base347.8

After tax · nominal AUD · valued at 1 Jan 2027

Scenario comparison

Revise the project without rebuilding the model.

The same calculation logic carries through each case, and the bridge decomposes the resulting NPV movement by model driver.

AssumptionsRecalculationScenario history

BASE CASE NPV
225.3AUDm
SCENARIO NPV
287.5AUDm
CHANGE VS BASE
+62.3AUDm
084168252335Base: 225.261454 AUDm225.3BasePrices: 110.095671 AUDm+110.1PricesProduction: -36.863267 AUDm-36.9ProductionCAPEX: -33.037058 AUDm-33.0CAPEXOPEX: -13.876600 AUDm-13.9OPEXOwnership: 35.940028 AUDm+35.9OwnershipScenario: 287.520228 AUDmNPV movement from base: 62.3 AUDm287.5Scenario
Base-case NPVIncreaseDecrease

Evidence + uncertainty

From assumptions to traceable results.

Every result keeps its assumptions, fiscal source, scenario and calculation version. Uncertainty is carried as a distribution, not a single point.

Recalculate

Move an assumption and the economics move with it. Nothing gets rebuilt.

Trace the result

Any number traces back to the input, the fiscal interpretation and the case that produced it.

Quantify uncertainty

Results come out as distributions, so the downside is quantified rather than inferred.

NPV frequency and cumulative probability1,000 valid simulated NPVs in AUD million. 0 are below zero. Bars count samples. The cumulative curve interpolates monotonically through histogram bin totals; the exact empirical curve is available in the cumulative-only view.SamplesCumulative probability00%3025%6050%9075%120100%120 to 130 AUDm: 2 samples (0.2%)130 to 140 AUDm: 9 samples (0.9%)140 to 150 AUDm: 16 samples (1.6%)150 to 160 AUDm: 32 samples (3.2%)160 to 170 AUDm: 36 samples (3.6%)170 to 180 AUDm: 50 samples (5.0%)180 to 190 AUDm: 58 samples (5.8%)190 to 200 AUDm: 62 samples (6.2%)200 to 210 AUDm: 77 samples (7.7%)210 to 220 AUDm: 82 samples (8.2%)220 to 230 AUDm: 92 samples (9.2%)230 to 240 AUDm: 116 samples (11.6%)240 to 250 AUDm: 92 samples (9.2%)250 to 260 AUDm: 76 samples (7.6%)260 to 270 AUDm: 48 samples (4.8%)270 to 280 AUDm: 55 samples (5.5%)280 to 290 AUDm: 34 samples (3.4%)290 to 300 AUDm: 28 samples (2.8%)300 to 310 AUDm: 22 samples (2.2%)310 to 320 AUDm: 12 samples (1.2%)320 to 330 AUDm: 1 samples (0.1%)Cumulative probability · monotone interpolation through sample bin totals120160200240280320NPV · AUDm
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

The Meridian product ecosystem

Start with our flagship. Expand when your projects demand it.

EVALUATE is the economic foundation. Add STAGE for delivery and CAPITAL for funding.

Capability
Project economics & fiscal logicIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncluded
Scenario comparison & uncertaintyIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncluded
Source traceability & audit trailIncludedIncludedIncludedIncludedIncludedIncludedIncludedIncluded
Programme, dependencies & stage gates— Not includedIncludedIncluded— Not includedIncludedIncluded
Schedule economics, risk & reforecasting— Not includedIncludedIncluded— Not includedIncludedIncluded
Funding requirement & financing structures— Not included— Not includedIncludedIncludedIncludedIncluded
Financing stress & transaction economics— Not included— Not includedIncludedIncludedIncludedIncluded

Meridian services

Additional services.

01

Bespoke Software

For repeatable modelling, operating or reporting workflows that do not fit the standard suite.

 02

Petroleum Consulting

Petroleum financial modelling, project support and due diligence.

See EVALUATE in action

Bring your project. Build the economics in real time.

Bring one of your projects. We’ll build it in EVALUATE in a 30-minute demo.