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Speaker: Stephanie Cooke, Chesapeake Energy 

Microseismic was acquired on 3 treatment wells, monitored by 2 vertical arrays and 2 horizontal tractored arrays in South Texas.  Completions tests varied approximately every 5 stages of the treatment wells and resulting microseismic was analyzed for changes in microseismic geometries from one completion design to the next.  Tests such as fluid design changes, changes in number of clusters and cluster spacing, diverter drops, increases in proppant per foot, and changes in rate were adjusted throughout the laterals.  The outermost well on the pad led the frac, while the two other wells near the middle of the pad followed with a zipper frac; variations in microseismic were observed between the leading well and the two wells that followed with a zipper.

Temporary fiber was logged on the three treatment wells, and production was monitored from stage to stage.  Due to logging constraints, only the heel third of the lateral had log coverage by the temporary fiber.  Changes in production were checked against variations in geology, structure, and completion design.  Using a non-linear regression, measured microseismic geometries were correlated to temporary fiber production, and predicted production was propagated out through the two-thirds of the lateral that couldn’t be logged toward the toe.

There were several learnings regarding development optimization and completion design from this study that were implemented into future development in the area.

Speaker Biography: Stephanie Cook, Chesapeake Energy
Stephanie Cook is a geophysical interpreter in the South Texas Business Unit at Chesapeake Energy. She’s spent the last four years working on the Lower Eagle Ford and Austin Chalk formations, focusing on seismic and microseismic interpretation, as well as integrated multidiscipline multivariate projects.  Prior to that, she worked for several years in the Mid-Continent Business Unit as a geophysical technician while she obtained her Master of Science in Geophysics from the University of Oklahoma.  During her time at OU, her thesis work focused on calibrating seismic fracture prediction using borehole image logs in the Mississippi Lime in northern Oklahoma.  She is currently the president of the Geophysical Society of Oklahoma City.

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