APPLICATION
/ Geomechanical Reservoir Modeling
/ Completion Optimization
TECHNOLOGY
/ Unconventional Logging Tool (ULT)
LOCATION
Oklahoma STACK, US
DOWNLOAD CASE HISTORY
/ PDF File
CLIENT CHALLENGE
An operator drilling in Oklahoma planned a series of horizontal wells adjacent to a saltwater disposal well, injecting produced water over the previous 3 years. Before the disposal well was drilled, the theory that the downhole stresses might have changed after the prolonged injection of produced water while extensive wireline logging performed.
The operator needed high-resolution logging data in the vertical, curve, and lateral to update their mechanical earth model and optimize future drilling and completions practices in the surrounding area with similar conditions.
SCIENTIFIC SOLUTION
Scientific Drilling International’s Unconventional Logging Tool (ULT) boasts an array of advanced logging sensors designed to perform in the most challenging downhole conditions. ULT’s ultrasonic sensor package records 128-sector images to identify micro-features, such as fractures and borehole breakouts. Its integrated collar design also includes a spectral gamma-ray and azimuthal sonic for a complete geomechanical evaluation logging tool suite.
This unique LWD tool is positioned in the drilling BHA to log the vertical, curve, and lateral in a single-bit run. After drilling the well to the landing point, the ULT tool was made up to the lateral BHA and logged while tripping and drilling the well to total depth. The data recorded to the tool’s memory incorporates into the mechanical earth model for future optimization efforts in the offset well’s drilling and completion program.
CLIENT VALUE
The ULT’s integrated collar design minimized additional length and LIH risk compared to traditional LWD tools. With a dual-battery-powered setup, the ULT could stay downhole for 7.5 days, capturing high-resolution logging data the entire time. Therefore, logging data acquirement across the zones of interest without affecting the expected drilling timeline or Days vs. Depth.
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