QUE$TOR (a product of S&P Global Commodity Insights / formerly IHS Markit) is the industry standard software for estimating Capital Expenditure (CAPEX), Operational Expenditure (OPEX), Abandonment Expenditure (ABEX), and conducting conceptual Field Development Planning (FDP) in the oil, gas, and energy sectors.

1. Key Capabilities and Functionality

• Engineering-Based Estimation:
• Unlike simple statistical models, QUE$TOR calculates equipment sizing based on engineering principles using flow rates, pressures, fluid properties, and reservoir specifications. It then derives costs from required material quantities and labor hours.
• The accuracy level is calibrated for conceptual and screening studies (AACE Class 4 / Class 5), typically falling within the ±25%\pm 25\%±25% to ±40%\pm 40\%±40% range.
• Comprehensive Regional Cost Databases:
• The software features quarterly database updates reflecting current material inflation (steel, alloys), rig dayrates, and engineering/construction labor wages across more than 50 global basins and geographical regions.
• Cost and Production Profiling:
• Automatically generates project schedules (Gantt charts) spanning from the FEED phase through construction, installation, drilling, commissioning, and First Oil/Gas.
• Generates cash flows and investment profiles categorized by project phases.
• Uncertainty & Risk Analysis:
• Supports Monte Carlo simulation to provide probabilistic cost distributions (P10P10P10 / P50P50P50 / P90P90P90).
• Calculates calibrated contingencies to target development costs at the P50P50P50 baseline.
• Energy Transition & CCUS Modules:
• Enables cost estimation for the CO2\text{CO}_2CO2​ value chain, including transport pipelines, high-pressure compressors, and dedicated injection wells.
• Models facility electrification options to assess strategies for reducing the carbon footprint.

2. Main Applications in the Industry

1. Concept Screening: Rapid technical and economic comparison between various development scenarios (e.g., evaluating a new-build FPSO versus a Subsea Tie-back to a host facility).
2. M&A Due Diligence: Fast, independent verification of cost estimates provided by operators during asset acquisition, bidding, or farm-in opportunities.
3. Exploration Prospect Evaluation: Estimating the Minimum Economic Field Size (MEFS) to determine commercial viability prior to committing to exploration drilling.

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