Multicomponent information is rapidly gaining acceptance in the land seismic market. It is becoming easier to get the message across about the value of land multicomponent seismic surveys. In the United States and Canada alone more than 150 projects have been undertaken using multicomponent acquisition systems which offer excellent coverage with survey sensors recording in the region of 18,000 channels. The breakthrough development was the introduction 5 or so years ago of Micro Electro Mechanical System (MEMS) technology, now available in land seismic acquisition systems from Sercel and Input/Output. This was the vital hardware ingredient that facilitated sensors able to more effectively record shear-wave data, which potentially provide additional information for imaging the structure and lithology of oil and gas reservoirs. In multicomponent studies, it is common to refer to the compressional wave as PP, the pure shear waves as SS and the converted waves as PS. There is little dispute these days that, technically at least, the PS wave can produce extra information of value.
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