 Exploration, development and production technical parameters
- Number of production wells drilled per year (drilling rate)
- Number of production development wells
- Oil well production rate
- Hydrocarbon production policy
Production policy over time
- Plateau oil production rate
- Remaining oil reserve at start of decline
- Decline rate of oil production
Production flow for Doba fields using GeoX  
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Cost parameters for production site
- Exploration well operation
- Appraisal well operation
- Construction in development
- Construction in buildup
Global project economics (CAPEX and OPEX)
- Development cost (fixed and variable)
- Operating costs (fixed and variable)
- Transportation cost – Pipeline (fixed and variable)
Economic scenario on world markets – Oil pricing and inflation rate
Oil prices variation over years 
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Results from economic modeling
- Monte Carlo simulation parameters : NPV rate, IRR required and number of iterations.
- Hydrocarbon flow diagram
- Project cash flow and time diagrams
- Business performance indicators
- Local government takes
- Decision tree
Predicted cash flow diagrams for Doba fields using GeoX 
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Final conclusions – The point of view of oil companies
In the case of the Doba oil project, these evaluations are aimed at building a good
understanding of the intended decisions and priorities on the side of the oil companies and particularly Exxon in the present oil project and its future extensions.
It is also intended to help in sorting out the possible conflicting issues between the various actors of the project, namely : the World Bank, the governments of Chad
and Cameroon and the environmental pressure groups.
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