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SUMMARY:Technical Happy Hour - April 2025
DESCRIPTION:Host: Society of Petroleum Engineers\, Denver SectionEvent: April 2025 Technical Happy HourTime: April 29th\, 4-6 (HH begins at 4\, Talk at 430\, Social until 6)Location: Liberty Energy\, 950 17th St\, Suite 2400\, Denver\, CO 80202Sponsor: LibertyStudy Group Category: Completion/Diagnostics/GeophysicsSpeaker: Joseph Mjehovich\, Geophysicist\, IFData LLCTitle: Bedding Plane Slippage and Fault Reactivation Captured by Cross-well LFDAS Monitoring During Hydraulic Fracturing\n\nAbstract:This study provides the first direct observations of horizontal bedding plane slippage detected using cross-well low-frequency distributed acoustic sensing (LFDAS) during hydraulic fracturing stimulation in the Sichuan Basin\, China. Traditional completion designs assume vertical tensile fracture propagation; however\, under certain stress and geological conditions\, fractures may grow horizontally\, reducing stimulation efficiency and posing risks such as induced seismicity and wellbore deformation issues. Distributed strain signals captured in a horizontal observation well displayed elliptical contours spanning multiple stages (300–700 m)\, characteristic of horizontal fracture growth. Additionally\, fault reactivation triggered by the horizontal fracture propagation is identified through a paired dipole-stripe signature in the strain signal. To validate these interpretations\, a displacement discontinuity method based geomechanical model was applied\, history-matching the LFDAS strain signals observed during selected treatment stages. The model confirmed that a shear deformation componentis required for horizontal fractures to match field signals\, implying bedding plane slippage.It also verified hydraulic connectivity between several natural faults and the horizontal\n\n\nfracture plane during injection\, leading to fault reactivation.These findings demonstrate the value of cross-well strain monitoring combined with advanced modeling techniques in understanding fracture behavior in complex geological settings. Recognizing the role of geological factors\, such as weak bedding planes and natural faults\, is essential for accurately predicting fracture growth\, optimizing stimulation strategies\, and minimizing risks in unconventional reservoir development.\n\nSpeaker Bio:Joseph Mjehovich is a Geophysicist at IFDATA\, specializing in the research and development of distributed fiber-optic sensing for reservoir characterization and well designdiagnostics. His work focuses on advancing the analysis and interpretation of cross-well fiber-optic measurements and integrating the company’s research and workflows into real-world field projects. Joseph holds a Master of Science in Geophysics from the Colorado School of Mines\, where he contributed as a research associate in the Reservoir Characterization Project (RCP) Consortium. His research included quantitative analysis of fiber-optic sensing data to better understand the driving mechanisms of hydraulic fracture development. Additionally\, Joseph explored the application of distributed acoustic sensing for near-surface seismic surveys to aid earthquake hazard site classification.\n\n\nRegister Here
URL:https://denverspe.org/event/technical-happy-hour-april-2025/
LOCATION:Liberty Energy\, 950 17th St Suite #24\, Denver\, CO\, 80202\, United States
CATEGORIES:Technical
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