Abstract:

To solve the problem which both source positioning accuracy and reliability are lower，we use the source location method of uniform speed P wave and travel-time fitting，and a Matlabbased positioning procedure of the source was established.Source location was conducted for the different envisaged schemes of distributions of
seismometers in the oil well fracturing microseismic monitoring,the 3D coordinate error maps of the location were drawed,the positioning accuracies were compared and a reasonable scheme of distribution of seismometer was selected.The simulation results show that this method improves the accuracy of source positioning,and according to the source position error pattern analysis obtained,we can select accurate,reasonable,effective scheme of distribution of seismometerin the case of the highest seismometer utilization.

Key words: source location, travel-time fitting, microseism monitoring, distribution of seismometer, positioning accuracy