Interpreting Uncemented Multistage Hydraulic-Fracturing Completion Effectiveness By Use of Fiber-Optic DTS Injection Data
- Eric H. Holley (Pinnacle, A Halliburton Service) | Menno M. Molenaar (Shell Canada Limited) | Erkan Fidan (Shell Canada Limited) | Ben Banack (Pinnacle, A Halliburton Service)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- July 2013
- Document Type
- Journal Paper
- 243 - 253
- 2013. Society of Petroleum Engineers
- 1.14 Casing and Cementing, 5.8.1 Tight Gas, 2.2.2 Perforating, 5.6.11 Reservoir monitoring with permanent sensors, 2.5.2 Fracturing Materials (Fluids, Proppant), 4.1.2 Separation and Treating, 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation
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Tight gas, low-permeability reservoirs offer a tremendous challenge withrespect to effectively completing and draining a target reservoir.Openhole-packer completions in horizontal wells offer a cost-efficient means ofaccessing the entire lateral section, assuming the target pay can beeffectively stimulated. The challenge with openhole completions compared withmore-conventional cased, cemented, and limited-entry perforated completions isunderstanding and controlling hydraulic-fracture geometry--specifically, thenumber and location of fracture-initiation points and the fracturing-fluid flowinto the near-wellbore (NWB) region of the reservoir. Fiber-optic-baseddistributed temperature sensing (DTS) offers a method for identifying,quantifying, and evaluating the NWB fracture geometry, the fracturing-fluiddistribution in these broad openhole sections, and overall stimulationeffectiveness. DTS can also reveal success or issues with respect to effectivezonal isolation when using mechanical isolation during the hydraulic-fracturingprocess. In this particular case study, a lateral well in a basin centered gasarea was completed with swell-packer interval isolation by use of fracturesleeves for reservoir access. By coupling fracture-treatment responses andopenhole log characteristics with the NWB DTS data during pumping and warmback, an integrated assessment of the completion stimulation effectiveness andefficiency was performed. The end result of this assessment provided animproved understanding of the current completion performance and allowedoptimization of openhole completion projects for future wells in this samearea.
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