Research during the past two years into the triaxial borehole seismic method of fracture azimuth estimation has led to the development of new data processing and analysis procedures. Applications of these techniques to data acquired in a variety of treatment zones and under a variety of treatment conditions have successfully yielded precise estimates of seismic polarization planes which exist in the microseismic data. Methods have also been developed, or are being developed, to unambiguously relate the polarization planes to real fractures in the earth. In addition, an advanced system of instrumentation has been developed and tested to simultaneously acquire bottom-hole pressure, microseismicity and temperature data in the treatment well.

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