Vertechs is committed to providing one-source solutions to its clients. AUI (Annular Ultrasonic Imaging) is a cased-hole ultrasonic logging technology utilizing echo amplitude, time of echo and echo impedance to precisely evaluate casing integrity, cement sheath and casing eccentricity. Hydraulic fracturing, one of the most important shale gas stimulation approaches,requires high quality zonal isolation by cementation. Vertechs commenced providing AUI logging in southwest China shale play since 2013. AUI logging enables our client to gain better insight of the shale gas cementing practice and reduce the cost on the cycle of cementing optimization substantially.