FOSA Case Studies & Papers
Fiber optic sensing examples and technical papers.
In the Cana Field in Western Oklahoma, horizontal wells are completed with multiple hydraulic fractures to economically produce from the Woodford Shale. This field development program is relatively young, and previous fracturing optimization had been achieved by trial and error testing. Cana wells usually are drilled with a 5,000-ft lateral, which is hydraulically fractured in 10-20 stages utilizing the plug-and-perf method with multiple clusters per stage. Throughout the early field development, there has been significant uncertainty regarding various subsurface parameters including: fracture propagation geometry, cluster contribution, and interference remediation. This paper describes a comprehensive fracture monitoring project, which will be used to further the understanding of the hydraulic fracture geometry, interference, deliverability, and production.
In late 2012, the project well was drilled as part of the infill development program. In January 2013, the well was completed with a 12 stage slickwater frac. Several established and cutting edge technologies were used to assist with monitoring the hydraulic fracturing operation of the subject and offset wells. These technologies included: Distributed Temperature Sensing (DTS), Distributed Acoustic Sensing (DAS), prototype cemented frac valves, permanent bottom hole pressure gauge, surface micro seismic, down hole micro seismic, offset bottom hole pressure monitoring, logging-whiledrilling, advanced open hole logging, radioactive tracers, and chemical tracers. These technologies were used successfully to monitor cementing operations, offset fracturing, monitor well fracturing, coiled tubing drill-out, flowback, and initial production. This project has assisted in the understanding of subsurface events and is expected to provide continued insight into long term production. Similar projects are being considered for the future, and this technology may ultimately become part of the standard completion.
This paper will focus on the planning, logistics, installation, and operation of this one of a kind monitoring project in the Cana Field.