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Direct Subsurface Measurements through Precise Micro Drilling

Su, Jiann-Cherng S.; Bettin, Giorgia B.; Buerger, Stephen B.; Rittikaidachar, Michal; Hobart, Clinton G.; Slightam, Jonathon S.; McBrayer, Kepra M.; Gonzalez, Levi M.; Pope, Joseph S.; Foris, Adam J.; Bruss, Kathryn; Kim, Raymond; Mazumdar, Anirban

Wellbore integrity is a significant problem in the U.S. and worldwide, which has serious adverse environmental and energy security consequences. Wells are constructed with a cement barrier designed to last about 50 years. Indirect measurements and models are commonly used to identify wellbore damage and leakage, often producing subjective and even erroneous results. The research presented herein focuses on new technologies to improve monitoring and detection of wellbore failures (leaks) by developing a multi-step machine learning approach to localize two types of thermal defects within a wellbore model, a prototype mechatronic system for automatically drilling small diameter holes of arbitrary depth to monitor the integrity of oil and gas wells in situ, and benchtop testing and analyses to support the development of an autonomous real-time diagnostic tool to enable sensor emplacement for monitoring wellbore integrity. Each technology was supported by experimental results. This research has provided tools to aid in the detection of wellbore leaks and significantly enhanced our understanding of the interaction between small-hole drilling and wellbore materials.

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TYPE SAND Report YEAR 2021
DOIOSTI

Close Observation of Hydraulic Fracturing at EGS Collab Experiment 1: Fracture Trajectory, Microseismic Interpretations, and the Role of Natural Fractures

Journal of Geophysical Research: Solid Earth

Fu, Pengcheng; Schoenball, Martin; Ajo-Franklin, Jonathan B.; Chai, Chengping; Maceira, Monica; Morris, Joseph P.; Wu, Hui; Knox, Hunter; Schwering, Paul C.; White, Mark D.; Burghardt, Jeffrey A.; Strickland, Christopher E.; Johnson, Timothy C.; Vermeul, Vince R.; Sprinkle, Parker; Roberts, Benjamin; Ulrich, Craig; Guglielmi, Yves; Cook, Paul J.; Dobson, Patrick F.; Wood, Todd; Frash, Luke P.; Ingraham, Mathew D.; Pope, Joseph S.; Smith, Megan M.; Neupane, Ghanashyam; Doe, Thomas W.; Roggenthen, William M.; Horne, Roland; Singh, Ankush; Zoback, Mark D.; Wang, Herb; Condon, Kate; Ghassemi, Ahmad; Chen, Hao; Mcclure, Mark W.; Vandine, George; Blankenship, Douglas A.; Kneafsey, Timothy J.

The final version of the above article was posted prematurely on 16 July 2021, owing to a technical error. The final, corrected version of record will be made fully available at a later date.

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TYPE Journal Article YEAR 2021
DOIOSTIScopus
11 Results
11 Results