--> Abstract: Uncertainty Analysis of Fault Dependent Prospects Represented as 2-D Maps, by Titus Murray, David Richardson, and Maren Kleven; #90078 (2008)

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Uncertainty Analysis of Fault Dependent Prospects Represented as 2-D Maps

Titus Murray, David Richardson, and Maren Kleven
Fault Seal Pty Ltd, Sydney, ACT, Australia

A workflow and stochastic fault seal algorithm has been developed to analyze the sealing/leaking nature of a series of faults in examples from Trinidad and Colombia.

While best practice is to make a detailed 3D Model for a field or prospects in many cases time, skills and or budget constraints mean that decisions have to be made without the “optimal” technical program. Structural and lithological uncertainties often overly even the detailed 3D models and if these uncertainties are not captured it may lead to erroneous assessments of the impact of possible variations and alternatives.

In this paper we show how 2D Maps are used to risk prospects and analyze fields.. In each case multiple fault dependencies are modeled simultaneously and complex fault geometries assessed. The probability of leakage, ranked leak points and distributions of hydrocarbon contacts can then calculated.

A key factor in any scientific/technical advancement in the industry is that it needs to be easily understood, used and deployed. By building specialist experience and knowledge into an “Expert System” we have been able to implement an approach which presents the results appropriately for the use by generalist geoscientists and engineers.

 

AAPG Search and Discover Article #90078©2008 AAPG Annual Convention, San Antonio, Texas