This document describes Geocap Seismic/Oil & Gas for ArcGIS software. It can be used by geoscientists for exploration and field development planning, creating high quality maps, calculating oil and gas volumes, assessing subsurface risk, and input to well planning and production forecasting. The software includes modules for seismic visualization and interpretation, and modeling petrophysical properties to calculate oil and gas volumes initially in place. It integrates seismic data, wells, and interpretations in ArcGIS for geoscience analysis and decision making.