Cement Bond Logs

Rahman Ashena, Ph.D., is a senior petroleum engineer with over a decade of field experience in drilling, well completion, and workover operations. He is the founder and senior well engineer at Smart Engineering and Data Analytics, where he leads the application of advanced data analytics to optimize petroleum, geothermal, and CCUS operations. His technical expertise includes well control, geomechanics, cementing, well integrity, and coring, and he has served as a consultant on complex well engineering projects across various regions. Dr. Ashena holds a Master’s in Petroleum Well Engineering from Curtin University (2009) and a Ph.D. from Montanuniversität Leoben (2017), where his research focused on geomechanics-driven drilling optimization. He serves as assistant editor-in-chief of the Journal of Petroleum Exploration and Production Technology (Springer). He is the corresponding author of the book Coring Methods and Systems (Springer, 2018), and a contributor to Artificial Intelligence Approaches in Petroleum Geosciences (Springer, 2024).William K. (Bill) Ott, P.E., is an independent petroleum consultant in Houston, Texas. He founded Well Completion Technology, an international engineering consulting and petroleum industry training firm, in 1986. Before consulting and teaching, Mr. Ott was the division engineer for Halliburton’s Far East region based in Singapore. Previously, he was a research field coordinator for Halliburton in Duncan, Oklahoma. Mr. Ott received his B.S. in Chemical Engineering from the University of Missouri. He is a registered professional engineer in Texas, a 50-year SPE member, and an SPE Distinguished Lecturer (2007-08) on the Selection and Design Criteria for Sand Control Screens. He has conducted technical petroleum industry courses worldwide and written numerous technical papers relating to well completion and workover operations. He co-authored the books World Oil’s Modern Sandface Completion Practices and Mature Oil & Gas Wells Downhole Remediation Handbook.

• Introduction.- Fundamental Acoustic Parameters.- Cement Bond Logs.- Cement Bond Logging Tools.- Affecting Wellbore Conditions.- Microannulus vs Microchannels.- Log Quality Control and Reliability.- Operational Guidelines for Supervising Acquisition.- Practical CBL Case Studies.- Pressure Integrity Tests.- Inflow Testing.- Holistic Approach to Cement Evaluation.- Temperature Noise and Other Methods.- Cement Plugs and P&A Evaluation.- Cement Integrity in CCUS Well.- HPHT and Geothermal Cement Integrity Evaluation.- Data-Driven and ML Approaches to Cement Evaluation.