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Oil Field NPV Estimator
A simple oil field project evaluation tool. Many economic models employ a level of complexity not justified by the large uncertainty in the input data. At DLL Engineering we think it is better to use simple models that allow you to quickly and easily see the effects of varying the inputs across the uncertainty ranges. Use this simple oil field economic model to calculate field life and NPV for different assumptions on reserves, field decline, oil price, Capex, Opex, Abex and taxation. Please contact us if you need a bespoke model for your particular needs. This can also be easily adapted for other industries.
Oilfield NPV Estimator.xlsx
Microsoft Excel sheet [34.9 KB]

Example Fault Trees
Fault tree template for Safety and Reliability analysis. Fault trees are a powerful tool for understanding system reliability and can be used quantified or unquantified. This template includes two simple fault trees; one for production reliability analysis and one for safety analysis. Example quantification and gate calculations are included. You can use the templates to adapt the trees to your own needs or contact DLL Engineering for bespoke fault trees tailored to your requirements, including detailed analysis of complex systems.
Example fault trees.xlsx
Microsoft Excel sheet [111.2 KB]

Reliability Calculations
Basic Reliability Engineering calculations. Use this spreadsheet to perform various Reliability Engineering calculations using your own data. Calculate failure rate and MTBF, including confidence limits, using your own failure history. Calculate Availability and Reliability. Calculate probability of multiple failures. Perform simple hypothesis testing to determine whether failure rate has changed. Adapt the calculations to your own needs or contact DLL Engineering for further support.
Reliability Calculations.xlsx
Microsoft Excel sheet [38.8 KB]