NanoSeis specializes in high fidelity surface microseismic processing. We have completed many large-scale real-time projects often lasting several months. During real-time, we have experienced geophysicists on staff 24/7 to locate and assign a focal mechanism solution for every event within minutes.
NanoSeis has been providing surface microseismic processing services for over 10 years. Our software is built to handle complex datasets using robust processing techniques including: accurate velocity model calibrations, joint processing with other acquisition data types, and individual source mechanisms for every event - even in real time.
NanoSeis uses an imaging approach to detect and locate microseismic events. Imaging is a robust approach especially in the presence of noise. In the example on the left, image (A) shows a clear strike slip microseisimic event in the trace data and image space along with the apparent focal mechanism. Image (B) is the same microseismic event with 20x random noise added. Even though the data quality is worse than example A and the event is hardly visible in the trace data, the image space shows a clear strike slip microseismic event with a very similar focal mechanism solution.
Our processing tools and workflows are transparent, built to minimize uncertainty and produce trustworthy results. Therefore, our processing tools are designed to easily QC the validity of the events and we welcome interactive discussion throughout the review process. We host brief weekly meetings with each client to invite you to review our solutions along the way so that you are as comfortable with your result as we are.
NanoSeis often recommends our patented patch array technology. By using a patch array, our clients avoid time-consuming permitting and surface land access issues. The signal to noise ratio is boosted enough to recognize clear arrivals for independent source mechanisms for every event. Sunburst and star arrays can be processed as well.
NanoSeis has relied on Dawson Geophysical for acquisition for over 10 years. Every project done together has been seamless, on-time, and to specification.
NanoSeis uses a sophisticated compression algorithm to handle large data volumes. In the example above, the top image shows an original, raw, not-compressed data file containing a microseismic event acquired by surface patches. The bottom image shows the same microseismic event from a compressed data file using an extreme compression ratio of 63:1. The aggressive compression ratio of 63:1 shows no loss in data quality. In practice, we use a much more conservative compression ratio, although the compression ratio can be increased at any time.