Efficiency of Surface Monitoring Layouts for Retrieving Accurate Moment Tensors in Hydraulic Fracturing Experiments

نویسندگان

چکیده

Abstract We study the sensor layouts of surface monitoring systems for injection areas in hydraulic fracturing experiments, which maximize accuracy retrieved moment tensors. The tensors (MTs) are determined using noisy synthetic P-wave amplitudes microearthquakes with varying mechanisms. An optimum layout is searched by minimizing a difference between true and inverted MTs. First, we tested efficiency circular networks. focused on one-circle two-circle various sizes numbers sensors each circle their centre epicentral region. results show that optimal events distributed within area characterized by: (1) one fixed area; (2) about 1/10 total number gathered near centre; (3) rest evenly surrounding take-off angle 135°. In homogeneous media, this corresponds to radius comparable depth microearthquakes. Second, compared other layouts: regular-grid, star-shaped uniform focal-sphere layouts. Taking 25 81 as examples, always best, means can achieve more accurate MTs than layouts, if experiment fixed. This contradicts common opinion networks, cover target area, work equally well irrespective layout.

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ژورنال

عنوان ژورنال: Pure and Applied Geophysics

سال: 2022

ISSN: ['1420-9136', '2385-2097', '0033-4553', '0033-4533', '0367-4355']

DOI: https://doi.org/10.1007/s00024-022-03122-9