Seismic data acquisition method with high fidelity and high signal to noise ratio
Ouyang Yonglin1, Song Wei2, Zeng Qingcai1, Hu Xinhai1, Huang Jiaqiang1, Jiang Ren1
1. Langfang Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Langfang, Hebei 065007, China;
2. CNPC Key Laboratory of Geophysical Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
Abstract：Based on geophone array, we discuss in this paper the relationship among reflection waveform characteristics, signal frequency spectrum, array length and offsets by ray tracing simulation. We also discuss influence of array length on signal fidelity and data resolution. Using wave equation forward modeling, we analyze influence of array length on imaging of small faults and sandstone pinchouts. It is found that geophone arrays have average effect on small scale geological target imaging, which leads lateral resolution decrease. Based on real data analysis, geophone arrays cannot acquire fidelity seismic data. Signals are damaged and data resolution is reduced. We believe that noise removal by geophone arrays is not scientific. In data acquisition stage in the field, we should first ensure data fidelity and signal energy, and noise removal will be carried out in the data processing stage to improve signal-to-noise ratio. Thus we put forward point-receiver approach which can acquire seismic data with high fidelity, high signal-to-noise ratio and high resolution.The proposed approach has been used in several blocks of Sulige Gas field and achieved very good results.
欧阳永林, 宋炜, 曾庆才, 胡新海, 黄家强, 姜仁. 高保真高信噪比地震资料的获取方法[J]. 石油地球物理勘探, 2016, 51(1): 32-39.
Ouyang Yonglin, Song Wei, Zeng Qingcai, Hu Xinhai, Huang Jiaqiang, Jiang Ren. Seismic data acquisition method with high fidelity and high signal to noise ratio. OGP, 2016, 51(1): 32-39.
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