Exact(59)
We choose the velocity model with the smallest perforation shot location errors as the model for locating microseismic events.
Then, the R-test is introduced to measure the three-dimensional displacement of a sphere located at the virtual pivot point and identify location errors.
The relative location errors are mostly in 5.0%.
Fig. 5 Relationship between moving speed and average location errors.
The following kinds of onset location errors may occur.
The average location errors are given in Table 3.
Fig. 8 UDR based on different location errors.
Smoothing can be used to account for such location errors.
The location errors were approximately ±100 m at most.
The efficiency and accuracy of location errors measurement method on five-axis machine tools are improved.
The user location is manually introduced in the system to avoid location errors.
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