Well Cement Integrity

Rahman Ashena, PhD

Rahman Ashena possesses over 10 years of field experience as a drilling, completion, and production engineer, complemented by more than 10 years of global consulting experience. He is the founder of Smart Energy and Data Analytics (SEDA) Group, based in Houston, USA. At SEDA Group, his team develops AI-based software, including the xOptim™ software suite, and delivers data-driven solutions for the petroleum and geothermal industries. These solutions encompass drilling (including UBD/MPD), reservoir PVT and material balance, and production engineering applications, with extensions into geothermal and carbon capture and storage (CCS) wells. SEDA Group also offers advanced engineering consulting, mentoring, training, and analytics support for energy projects globally.

Ashena is the author of several notable books, including:

• The Practical Handbook of Well Control
• Cement Bond Logs: Guidelines and Interpretation
• Coring Methods and Systems

He has also published over 80 peer-reviewed technical papers focused on well engineering and artificial intelligence applications. Since 2023, he has served as Co-Editor-in-Chief of Springer’s Journal of Petroleum Exploration and Production Technology.

Ashena holds a PhD in Petroleum Well Engineering from Montanuniversität Leoben (2017), an MSc from Curtin University (2009), a BSc from the Petroleum University of Technology (2007), and an MSc in Data Science and Analytics.

Jacquie Greenwell

Jacquie Greenwell brings over 27 years of experience in the oil and gas industry, specializing as an independent Senior Well Integrity Engineer. She previously served as Completions and Well Interventions Team Lead at Santos Ltd and is currently a consultant at SEDA Group. Greenwell began her career with SLB as a field wireline logging engineer, working both onshore and offshore in Australia and New Zealand. Her expertise lies in addressing operational and abandonment well integrity challenges, risk management, well maintenance, and barrier verification. She has been involved in managing and recognizing loss of containment incidents and developing preventative strategies. Greenwell has developed Well Integrity Management systems for various clients in accordance with ISO 16530-1. She is passionate about mentoring engineers and training production personnel in the fundamental principles and risks associated with the operational management of wells. Greenwell holds a Bachelor of Engineering (Chemical) and a Bachelor of Science (Organic Chemistry) from The University of Melbourne, Australia.

William K. (Bill) Ott, P.E.

William K. (Bill) Ott, P.E., is an independent petroleum consultant based in Houston, Texas. He founded Well Completion Technology, an international engineering consulting and petroleum industry training firm, in 1986. Prior to his consulting and teaching career, Mr. Ott served as the division engineer for Halliburton’s Far East region, based in Singapore. He was previously a research field coordinator for Halliburton in Duncan, Oklahoma. Mr. Ott earned his BS Degree in chemical engineering from the University of Missouri (1972). He is a registered professional engineer in Texas, a 50-year SPE member, and was an SPE Distinguished Lecturer (2007-08) on the Selection and Design Criteria for Sand Control Screens. He has conducted technical petroleum industry courses globally and authored numerous technical papers related to well completion and workover operations. He is a co-author of World Oil’s Modern Sandface Completion Practices, World Oil Mature Oil & Gas Wells Downhole Remediation Handbook, and Cement Bond Logs: Guidelines and Interpretation. Ott is a respected consultant in cementing, drilling, and well integrity at SEDA Group.

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