Composite log of GGR5 pilot hole, displayed below casing shoe (top of Dogger carbonates). MD Depth scale = MDRT/from Rotation Table, 10 m above GL (first track on the left). TVD-SS = True vertical Depth from Sea level (50 m below RT). TVD-GL = TVDSS + 40 m (third track from left). Lithological units: CA-0 = Top of carbonates near base-Callovian. Btn = top of Bathonian transgressive-regressive sequence of order « n ». Red boxes = permeable oolite beds, corresponding to high porosity values and low velocity (V = 1/sonic) and density values, except for the deepest bed on top of Bt3.