الحفر الموجه المعرفة. Screenshot of an Isopach map generated by reservoir modeling software for an 8500 ft deep oil reservoir 28 ft thick loed in the Erath field, Vermilion Parish, Erath, Louisiana.The contour interval is 2 ft between successive contour lines.Because oil floats above water, the outer red color indies the elevation of the water/oil contact zone, which is at ...