partially supported by the National Natural Science Foundation of China(Nos.11204380,11374371,61102102,and 11134011);National Science and Technology Major Project(No.2011ZX05020-009);Petro China Innovation Foundation(No.2013D-5006-0304);Chinese Petroleum Corporation Project(Nos.2011A-3903 and 2011B-4001)
Ultrasonic cement bond logging is a widely used method for evaluating cementing quality. Conventional ultrasonic cement bond logging uses vertical incidence and cannot accurately evaluate lightweight cement bonding. O...