Multicomponent distributed acoustic sensing

Distributed Acoustic Sensing (DAS) data in boreholes are not commonly used for reservoir characterization because multicomponent data are needed to quantify different wave modes. We propose two approaches to obtain multicomponent DAS data by using either multiple parallel optical fibers or a helical optical fiber. The multiple parallel optical fibers use the shape sensing method which is based on measurements of axial strain gradient to obtain the curvature of the cable and then reconstruct the components of the displacement field. However, simply using curvature measurements does not provide sufficient information to reconstruct the displacements for different wave modes. The helical optical fiber uses the characteristics of the helix shape to obtain angle dependent strain measurements, which provides sufficient information to reconstruct the strain tensor of the surrounding field. Presentation Date: Monday, October 17, 2016 Start Time: 1:00:00 PM Location: Lobby D/C Presentation Type: POSTER