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Speaker: Bryce Jensen, Shell Exploration & Production Co
Co-Authors:
Jacob Bayer, Formerly with Shell; Currently with Beacon Offshore Energy
Yinping Li, Recently retired from Shell International Exploration and Production
Tianrun Chen, Shell International Exploration and Production
Ken Matson, Shell International Exploration and Production

Seismic imaging of subsalt reservoirs can be extremely challenging. As interpreters, we are often left with suboptimal images of the reservoir or challenging overburden geology, which lead to either poor estimates of resource volume or a wide range of uncertainty. To enhance subsurface understanding and volume estimates for a subsalt reservoir in the Gulf of Mexico, Shell acquired two vertical seismic profiling (VSP) surveys in 2018 and 2019 in two deepwater wells using seismic while drilling (SWD) technology to attempt to estimate salt proximity and therefore, get a better sense of reservoir extent and salt positioning uncertainty. In this talk, we present how we went about making the decision to acquire the two surveys through a value of information exercise. The surveys were designed with an emphasis on efficiency, salt velocity model calibration, and vertical data coverage. We develop a comprehensive analysis to integrate the P-wave sediment and salt proximities with a converted PS salt proximity in order to delineate the salt boundary with confidence and better accuracy. We compare the outcomes from the two independent surveys, how the data improved the understanding of the salt root shape and positioning, and their impact to infill well locations. Finally, we discuss the results from the infill development wells and future considerations for the VSP data and surface seismic imaging.

Speaker Biography: Bryce Jensen, Geophysicist, Shell Exploration & Production Company
Bryce Jensen joined Shell as a geophysicist in 2010 working from Houston, TX. He received his B.Sc. degree in Geology from Brigham Young University and M.Sc. degree in Geophysics from the University of Oklahoma. With 10+ years of oil and gas industry experience, Bryce has spent a majority of his career with Shell as a seismic interpreter supporting Onshore and Deepwater Development and Production assets. He has a passion for taking geophysical technologies and products for practical application towards solving complex technical challenges and impacting business decisions.  His background includes contributions to various onshore and offshore surface seismic acquisition, processing, 3D and 4D interpretations projects to influence field development, reservoir models, well planning, and well operations. Recently, Bryce has ventured into borehole geophysics which included planning and execution of two VSP surveys to influence production well placement for the field development plan for an asset in the Gulf of Mexico. He gave a talk surrounding the planning, results, and learnings of this project at SEG 2019 and co-authored a subsequent paper entitled “Salt/Sediment proximity to delineate 

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