Utah FORGE: 16B(78)-32 RFS DSS Strain Change Rate and Selected FDIs During 16A(78)-32 Stimulation

Description

This dataset contains strain change rate versus depth data acquired using a Rayleigh frequency shift (RFS) distributed strain sensing (DSS) system during hydraulic stimulation of well 16A(78)-32 at the Utah FORGE site in April 2024. The data were collected from an optical fiber installed in the annulus of production well 16B(78)-32, approximately 300 feet from the injection well. The dataset includes tabulated strain data, documentation of the methodology used to generate a frac log by integrating strain change rate signals over selected time windows to identify fracture events, and a spreadsheet of selected Fracture Driven Interactions (FDIs) identified from the same measurements. The FDIs were derived from cross-well RFS DSS observations while stimulating well 16A(78)-32 and monitoring strain rate in well 16B(78)-32 using fiber cemented behind casing. Selected FDIs were high-graded and used to inform perforation cluster placement for stimulation of well 16B(78)-32, with selections made by Utah FORGE representatives under the guidance of Neubrex Energy Services (US), LLC, and a fiber installation consultant. Together, the dataset documents the acquisition, processing, and interpretation of cross-well strain measurements used to identify fracture-related strain features over approximately 1100 ft of the monitored wellbore.

Resources

Name Format Description Link
57 This archive contains the tabulated strain change rate data in an Excel file. Also provided is a PDF that includes slides on the methodology for creating the frac log as well as detailed visualizations of the results. https://gdr.openei.org/files/1720/Neubrex.zip
53 This spreadsheet contains selected Fracture Driven Interactions (FDIs), also referred to as frac hits, that were identified and high-graded during the April 2024 stimulation of well 16A(78)-32. The selections were used to guide perforation cluster placement for stimulating well 16B(78)-32 and were made by Utah FORGE representatives with guidance from Neubrex Energy Services (US), LLC, and a fiber installation consultant. The FDIs were determined from cross-well Rayleigh Frequency Shift Distributed Strain Sensing (RFS DSS) data acquired using fiber optics cemented behind casing in well 16B(78)-32. While stimulating well 16A(78)-32, strain rate was monitored over approximately 1100 ft of the observation well, with FDIs identified as local positive strain change peaks along the well length. The measurements were collected with a temporal sampling interval of approximately 60 seconds and a spatial resolution of about 20 cm. https://gdr.openei.org/files/1720/Selected%20FDIs%20in%2016B%2878%29-32_April%202024%20Stimulation.xlsx

Tags

  • rfs
  • strain
  • cumulative-strain-change-rate
  • strain-change
  • processed-data
  • strain-frac-log
  • fracture-driven-interactions
  • 16b78-32
  • egs
  • fdi
  • geomechanics
  • utah-forge
  • strain-change-rate
  • hydraulic-stimulation
  • cross-well-strain-monitoring
  • perforation-cluster
  • 16a78-32
  • microstrain
  • frac-hits
  • rayleigh-frequency-shift
  • dss
  • neubrex
  • depth-profile
  • fiber-optics
  • frac-log
  • geothermal
  • energy
  • fiber-optic-sensing

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