Canadian Dip-in DAS (CanDiD) Project 2

The objective of the CanDiD-2 project was to acquire distributed acoustic sensing (DAS) data in a deviated wellbore during hydraulic fracturing operations in nearby horizontal wells, and thereby to characterize the subsurface strain and microseismicity that accompanied the growth of tensile fractures during well stimulation. The experiment took place in the Grande Prairie region of northwestern Alberta, Canada. As one of the first times that a temporary optical fibre was used for this purpose in Canada, a secondary technical aim of CanDiD-2 was to evaluate the effectiveness of a temporarily deployed fibre. The data were acquired using a DAS gauge length of 10m and a spatial sampling interval of 1m, with a temporal sample rate of 1 kHZ. A fibre optic monocable was deployed from the wireline truck and pumped to a depth of nearly 5000m into a deviated well. The raw strain-rate observations were acquired in a proprietary data format and have been converted to .hdf5 data format, which can be read using the open source package h5py (https://www.h5py.org).