Modeling of fiber-optic strain responses to hydraulic fracturing

• DOI: 10.1190/geo2020-0083.1
• Publication Date: 2020-08-10T10:53:43Z
• Authors: Zhishuai Zhang; Zijun Fang; Joe Stefani; James DiSiena; Dimitri Bevc; Ivan Lim Chen Ning; Kelly Hughes; Yunhui Tan
• Keywords: Discontinuity (linguistics); Wireline

We modeled cross-well strain/strain rate responses of fiber optic sensing, including distributed strain sensing (DSS) and low-frequency acoustic (DAS), to hydraulic stimulation. DSS DAS have been used measure or the characterize fractures. However, current application DSS/DAS is limited acquisition, processing, qualitative interpretations. The lack geomechanical models hinders development technology toward quantitative interpretation inversion. developed a strategy use displacement discontinuity method model field around kinematically propagating For horizontal monitoring well, modeling results were able explain heart-shaped extending pattern before fracture hit, polarity flip due interaction during stimulation, V-shaped when does not intersect with well. vertical shows different characters near far away from also investigated effects fractures various geometries such as elliptic layered compared verified data Hydraulic Fracturing Test Site 2, research experiment performed in Permian Basin. Our work can be identify patterns observations. help improve acquisition design lay groundwork for