Because we had a surplus of fantastic papers for last month’s Value of Integrated Geophysics (VIG) Edition, the April RECORDER carries a continuation of similarly themed articles.
Rebecca Daniels and Brian Schulte of Talisman wrote our first article "Geophysical Methods for Mapping a Shallow, Unconsolidated Gas Sand". In this paper, Rebecca and Brian explain how they unlocked greater potential in a new shallow pool which is produced using CHOPS systems. Due to the shallow depth of the pool and the observed production results, the return on these wells is approximately twice what was paid out. Unfortunately wells that are drilled too close to the gas cap would be lost due to gas breakthrough, and the full net value of the well could not be obtained. Amplitude versus Offset (AVO) analysis of high resolution 3D seismic data was used to confirm the extent of a gas cap that needed to be avoided. Geophysical mapping of the gas cap gave Talisman the confidence to step out of the core development area to access greater reserves, thanks to the integrated efforts of geology, geophysics, and engineering.
Marian Hanna and Doug Uffen then provide a thorough commentary in "Reliable Geophysics". This paper goes deep into the questions that we need to ask ourselves about the reliability and suitability of various geophysical techniques. The authors provide conventional and unconventional examples to reinforce how integrated geophysical products add value and how reliably they contribute to producible reserves. They illustrate how discerning where and when these techniques are suitable for a specific issue or problem is key to the effectiveness of the methods deployed. This is a very useful concept in the value of integrated geophysics because reserves estimation is, after all, the ultimate goal of the entire team!
About the Author(s)
Amanda Knowles is a professional geophysicist at Canadian Natural Resources Ltd. (CNRL) with 7 years of interpretation experience in the Western Canadian Sedimentary Basin in Alberta and B.C., as well as the Williston and Elk Point Basins in Saskatchewan. Amanda graduated from the University of Toronto in 1996 with an Honours Bachelors of Science degree majoring in Biology and with minors in Physics and English. After moving west, she attended University of Calgary and obtained a second Bachelors of Science degree in Geophysics, while raising her three daughters. Amanda gained her interpretation experience working at Worley Parsons Komex, RPS Boyd PetroSearch, and Oil Sands Imaging. Her current role at CNRL involves varied applications of interpretation techniques using quality well information to characterize reservoirs and investigate rock properties to reduce exploration and production risk. Amanda takes an active role volunteering for the CSEG as part of the Symposium Committee and VIG Committee. She is also a CSEG Mentor and a member of the Human Ventures Institute.