Matt Grove¹

(1) ExxonMobil Exploration Company, Houston, TX

ABSTRACT: GIS-based lead mapping and analysis

Lead mapping is a critical step in the initial stages of petroleum exploration and requires the integration of multiple data layers including depth-structure, rock facies, and seismic attributes. Manually integrating these data to identify and map potential hydrocarbon accumulations is a time- and resource-intensive process. In an effort to improve the efficiency of the lead mapping process, a GIS-based system has been developed to identify, delineate, and analyze structural and stratigraphic closures at scales ranging from regional mapping to individual prospects. This system was developed using Arc/INFOâ GIS to model fluid flow across a surface, identify closures, and delineate lead outlines. The GIS system is also used to integrate additional data and to calculate and capture extensive attribute information for subsequent analysis.

GIS-based lead mapping provides several advantages over traditional methods. The GIS system can greatly increase the speed and accuracy of lead mapping by automating many of the lead-mapping processes and by locating potential traps that might otherwise be overlooked. In addition, the GIS system allows multiple data layers in a variety of formats to be analyzed in an integrated environment. Incorporating data layers encompassing all elements of the hydrocarbon system provides a means for quantitatively analyzing and ranking large numbers of leads. Although GIS-based lead mapping will not fully automate all of the necessary processes, improved data integration and substantial time and cost reduction make GIS a powerful tool for lead mapping.

AAPG Search and Discovery Article #90906©2001 AAPG Annual Convention, Denver, Colorado