SPEAKER: Hani Elshahawi - Shell
Speaker Bio:
Hani Elshahawi
is Deepwater Digitalization Lead and Formation Testing and Sampling Principal
Technical Expert at Shell where he has spent the last 16 years. Hani was
previously GameChanger, served as Deepwater technology advisor and capabilities
manager, and led FEAST-Shell’s Fluid Evaluation and Sampling Technologies
center of excellence. Prior to Shell, Hani spent 15 years with Schlumberger in
over 10 countries in Africa, Asia, and North America during which he has held various
positions in interpretation, consulting, operations, marketing, and technology
development. He holds several patents and has authored over 150 technical
publications. He was the 2009-2010 President of the SPWLA, recipient multiple
SPE and SPWLA awards and a distinguished lecturer for both societies.
Abstract: Paper MM
For E&P
companies, well integrity during the production cycle is of paramount
importance for safeguarding health, safety, and the environment (HSE) and for
maintaining the license to operate. In this paper, a novel well integrity
enhancement solution is presented. Specifically, we describe the development of
a smart well cement with specific enhanced acoustic signatures that can be
detected by traditional sonic logging tools as well as next generation
ultrasonic tools. This smart acoustically responsive cement utilizes specially
engineered particle fillers that act as acoustic band gap filters and contrast
agents at specific frequencies. The resultant acoustic signature can thus be
analyzed to determine the mechanical integrity of the cement as well as the
mechanical stress experienced by the cement.
During the
development of this technology, finite element analysis and simulations were
used to determine the acoustic response and guide the design of the smart
cement. The smart cement was produced on the lab scale, and the acoustic band
gap features were confirmed using vibrational measurements. Ultrasonic
measurements were then used to determine the acoustic response of subscale
composite structures, including under mechanical load and in simulated
environmental tests. Finally, shallow buried pipes with cemented annuli and engineered
voids were constructed for pilot testing. During that final stage, a slim hole
monopole sonic logging tool was used to map the cement location and determine
the location and relative degree of mechanical loading.
Stress was
applied using a variety of methods and mapped along the wellbore. The results
indicated improved acoustic detection using sonic bond log tools including
uniquely identifiable cement placement, enhanced void discrimination, and
localization of loaded regions. The acoustically responsive cement allows
distinguishing between fluids and lightweight cement, monitoring of formation
depletion and reservoir compaction, and increased knowledge of wellbore
stresses in the oil field. Furthermore, the material has the potential to be
continuously monitored with an acoustic interrogation system for remote
real-time indication of cement stress and integrity on a zone-by-zone basis
This makes the smart
acoustically responsive cement particularly valuable for detecting and thereby
reducing cement-related well integrity risks.
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