Cement Bond Logs

This book focuses on cement bond logs (CBL) as a critical tool for ensuring long-term well integrity. It covers key topics such as acoustic fundamentals, factors influencing cement bond and variable density log (CBL/VDL) readings, cement bond logs evaluation, and methods to address the microannulus effect, which can lead to misleading log results. It also includes a discussion of waveforms, particularly in relation to VDL readings. The book explores how both conventional sonic and new ultrasonic technologies capture and interpret waveforms to assess variations in cement bond integrity. Practical case studies are provided to demonstrate how sonic and ultrasonic CBL interpretation can improve decision-making in assessing well integrity. Additional guidance is provided on evaluating log quality, supervising and witnessing logging operations, and comparing different logging tools.

Cement Bond Logs: Guidelines and Interpretation serves as an essential resource for engineers and researchers seeking to improve wellbore integrity through practical and accurate cement evaluation.

Describes cement bond logs evaluation, supervision and guidelines for logging and interpretation Emphasizes the crucial role that cement bond logs play in maintaining well integrity Provides case studies with interpretations of practical types of logs

Autorentext

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 (SEDA) Group in Houston, specialized in consultancy and applying advanced data analytics techniques to optimize well and reservoir operations in petroleum, geothermal, and CCUS industires using xOptim software suite. His technical expertise includes well engineering including well control, geomechanics, well integrity, fluids/cement, P&A. Ashena has served as a consultant on complex well engineering projects across various regions and has served as a fellow in grid energy project in Oklahoma. Dr. Ashena holds a Master's in Petroleum Well Engineering from Curtin University (2009) and a Ph.D. from Montanuniversität Leoben (2017). 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, The Practical Handbook of Well Control, and the chapter author of Artificial Intelligence Approaches in Petroleum Geosciences. His next book is Cement Well Integrity.

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.

Inhalt

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.