Seismic data character of single-point digital geophone and processing strategy
Feng Gang1,4, Bi Li-fei2,3, Li Jian-ming3, Kong Qing-feng3
1. Geophysical Exploration and Development Company, Shengli Petroleum Administration, SINOPEC, Dongying City, Shandong Province, 257100, China;
2. China University of Geoscience, Wuhan City, Hubei Province, 430074, China;
3. Geophysical Research Institute, Shengli Petroleum Administration, SINOPEC, Dongying City, Shandong Province, 257022, China
Abstract：The seismic data acquired by single-point digital geophone is characterized by high resolution and low S/N ratio. Due to a pair of contrary of resolution and S/N ratio and based on basic principle of digital geophone, the paper presented using multiple application of multiple methods improving resolution and S/N ratio in multi-domain to carry out iterative processing, which improves both resolution and S/N ratio of data, successfully realizing optimum combination of improving resolution with improving S/N ratio and getting following knowledge: ①since broad band and large dynamic range of frequency of digital geophone data, resolution improving while further broadening band may associate with a lot of noises with higher and lower frequencies, lowering S/N ratio significantly, it should use multiple denoise tools to suppress noise while improving resolution; ②using surface-consistent deconvolution in shot domain, statistic wavelet deconvolution in CMP domain, optimized offset stack plus poststack predictive deconvolution plus inverse Q-filtering can effectively improve the resolution of data, and lowering the S/N ratio in a certain degree at the same time; ③using following techniques such as suppressing plane and anomalous noises in shot domain, suppressing high-frequency noises in CMP domain, poststack suppressing random noise and high-frequency noises and channel array technique and array stack for small bin-size data can effectively improve S/N ratio of data. Using the methods presented in the paper finished the 3D data processing of digital geophone in the Keng-71 area, the events in final processed results are characterized by clear configuration, good coherence, good correlation, better interpretable property and improvement in both S/N ratio and resolution.
冯刚, 毕丽飞, 李建明, 孔庆丰. 单点数字检波器地震资料特点及处理对策[J]. 石油地球物理勘探, 2008, 43(增刊2): 115-120.
Feng Gang, Bi Li-fei, Li Jian-ming, Kong Qing-feng. Seismic data character of single-point digital geophone and processing strategy. OGP, 2008, 43(增刊2): 115-120.
