| GeoX Tutorial - Key
inputs & outputs for technical-economic evaluation
Consider the following decision situation:
You need to decide whether or not to drill a wildcat on the Alpha
prospect. Alpha is located in a mature area with proven hydrocarbon
accumulations and is thought to be an oil prospect.
Prospect analysis is used to determine both
how attractive the Alpha prospect is in terms of oil & gas potential
and what the risks are that Alpha might turn out to be dry. You
also need to consider what is the potential return from an investment
in a wildcat well on Alpha. The outputs of your analysis of Alpha
are therefore an estimate of the dry hole risk and an estimate of
the likely quantities of oil and associated gas. This technical
analysis will be complemented with an estimate of the full cycle
discounted cash flow that considers both the costs of drilling and
the revenues with costs should a possible discovery be transformed
into a producing field.
The main data required for the technical
analysis of the prospect will include:
- Volumetric parameter estimates used to
estimate in-place resources
- Recovery rate estimates used to estimate
recoverable resources
- Risk factor estimates used to estimate
the dry hole risk
For an economic analysis of the prospects
potential, the main data required will include:
- Exploration, development and production
(ED&P) activity level and duration estimates
- Unit capital expenditure and operating
cost estimates
- Petroleum price scenario estimates
- Fiscal regime parameters
Each of these data items will be reviewed
in the upcoming sections. The review covers only themain
data items that need to be entered. It does not cover all options
and it does not cover data items that are not relevant for a simple,
rapid initial analysis of the Alpha case.
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