# Energy Monte Carlo (EMCEE)

EMCEE (for Energy Monte Carlo) and Emc2 (for Energy Monte Carlo program 2) are U.S. Geological Survey (USGS)-developed Monte Carlo simulation programs for assessment
of undiscovered conventional oil and gas resources. EMCEE allows a variety of distribution types for input, whereas Emc2 works with a specific set of distributions. Both programs run
as spreadsheet workbooks in Microsoft Excel.

EMCEE and Emc2 require Crystal Ball, a commercially available Monte Carlo simulation program from Decisioneering, Inc., that runs in Microsoft Excel. EMCEE and Emc2 forecast undiscovered resources by simulating the sizes and numbers of undiscovered oil and gas fields. The user provides input distributions for several variables. The program samples from these distributions and calculates a forecast of undiscovered resources. This procedure is then iterated a specified number of times and the distributions of forecasts are presented in both tabular and graphical formats.

The programs EMCEE and Emc2 are contained in Microsoft Excel workbooks, copies of which are included in the folder named chapter 26_PROGRAMS. The files are named emcee.xls and Emc2.xls

## References

*This article incorporates public domain material from the document: "A Monte Carlo Simulation Method for the Assessment of Undiscovered, Conventional Oil and Gas"*