Fig. 6

3D lithologic mapping example from Tuscarora. Data from geologic cross sections (purple cubes) and downhole lithologic interpretation (yellow discs) are ‘hard’ data providing the primary controls on the geometry of the stratigraphic surfaces. ‘Soft’ data (green cubes) constrain the stratigraphic surfaces distal to hard data, such that stratigraphic thickness and the amount of stratigraphic offset across faults are retained. Red wells are production wells; blue wells are injection wells