Changelog

What's new in Meridian

A running log of features, improvements, and fixes shipped to the platform. We ship updates fortnightly.

v1.8.0Feature28 February 2026

Indonesian Gross Split fiscal regime

  • Full implementation of Indonesia's Gross Split PSC regime with automatic base and progressive split calculations.
  • Supports variable component adjustments for field status, location, reservoir depth, CO2 content, and cumulative production.
  • Includes government first tranche petroleum and domestic market obligation modelling.
v1.7.2Improvement20 February 2026

Improved DCA editor performance

  • Decline curve analysis editor now renders up to 10x faster for wells with long production histories (5,000+ data points).
  • Added lazy loading for historical production overlays, reducing initial load time from 3.2 seconds to under 400 milliseconds.
  • Chart zoom and pan interactions are now GPU-accelerated for smoother performance on all devices.
v1.7.1Fix12 February 2026

Reserves waterfall rounding correction

  • Fixed an issue where the reserves reconciliation waterfall chart could display small rounding discrepancies between opening and closing balances.
  • The underlying calculation was correct; the display issue was caused by floating-point truncation in the chart rendering layer.
  • Reconciliation reports now display values rounded to the user's configured decimal precision consistently across all outputs.
v1.7.0Feature1 February 2026

Scenario comparison dashboard

  • New side-by-side scenario comparison view with synchronised scrolling and colour-coded difference highlighting.
  • Compare up to eight scenarios simultaneously across NPV, IRR, payback, government take, and any user-defined metric.
  • Export comparison tables to PDF and Excel with full formatting and your company branding.
v1.6.3Improvement18 January 2026

Bulk import for production data

  • CSV and Excel import now supports batch upload of production data for multiple wells in a single operation.
  • Automatic column mapping with intelligent header detection for common formats from PPDM, Petrosys, and OFM exports.
  • Added progress tracking and detailed error reporting for large imports (tested with datasets up to 500,000 rows).
v1.6.2Fix10 January 2026

PRRT augmentation rate calculation fix

  • Corrected an edge case where the GDP deflector factor augmentation rate was applied using the calendar year rather than the financial year for projects with a non-standard balance date.
  • Affected a small number of models with balance dates other than 30 June. All other PRRT calculations were unaffected.
  • Added additional validation checks to flag non-standard balance dates during model setup.
v1.6.1Improvement5 January 2026

Enhanced audit trail exports

  • Audit trail exports now include the full change diff showing previous and new values for every modified field.
  • Added filtering by user, date range, and change type (creation, modification, deletion) in the audit log viewer.
  • Audit exports are now available in JSON format in addition to CSV and PDF for integration with external compliance tools.
v1.6.0Feature20 December 2025

Malaysian PSC and RSC support

  • Added fiscal regime support for Malaysian Production Sharing Contracts and Risk Service Contracts.
  • Covers Peninsular Malaysia, Sabah, and Sarawak terms with configurable cost recovery ceilings, profit sharing tranches, and PETRONAS carry provisions.
  • Includes Malaysian Petroleum Income Tax (PITA) and supplementary payments modelling with automatic interaction calculations.

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