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《China Petroleum Exploration》 2007-06
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Application and Prospect of Full Digital Seismic Exploration Technology

Wang Xishuang1, Dong Shitai2, Wang Meisheng3 1 PetroChina Exploration and Production Company, Beijing 100011; 2 Department of Geophysical Exploration Technology, Research Institute of Petroleum Exploration and Development, Beijing 100083; 3 CNPC BGP, Zhuozhou City, Hebei Province 072751  
According to conventional seismic exploration technology, analog signals exported from analog geophones are imported into digital seismograph acquisition units or key stations for analog-digital conversion, data arrangement, and storage, and then are reprocessed in data processing centers. However, based on full-digital seismic exploration technology, the digital geophone system is employed, as well as digital signals exported from digital geophones are digitally transmitted into key stations for arrangement and storage. At last, the digital signals are processed by using the technology of digital combination and superposition and reprocessed in data processing centers. As compared to the conventional technology, the new one improves the capability for resisting electromagnetic interference in transmitting signals, enhances the instantaneous dynamic range of signals, broadens frequency bands of signals, and is favorable for improving the signal-noise ratio and resolution of seismic data. PetroChina has so far cumulatively acquired 6,485 kilometers of 2D full-digital seismic data and 936 square kilometers of 3D full-digital seismic data, of which the quality is obviously improved.
【CateGory Index】: P631.4
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