地震资料分辨率表征研究

Study on Characterization of Resolution of Seismic Data

地震资料分辨率的准确表征是提高分辨率研究的难点和关键之一。针对正演模拟、实际地震和井间地震资料,从客观量化角度对地震资料分辨率与频谱特征参数的关系进行了研究。结果表明:地震资料分辨率可由地震子波更准确表征;在有效频带范围内,主频和优势频带随着分辨率的提高逐渐向高频端移动,在地震资料高频信息增多的同时,其低频特征参数表示的低频信息相应减少;地震资料分辨率的表征呈现复杂性、多样性和系统性。

It was difficult and one of the key points to characterize resolution of seismic data accurately for the study of improving the resolution.The relation between resolution and spectral parameters was studied objectively and quantitatively for forward modeling seismic data,fractural seismic data,crosswell seismic data.The results show that:① the seismic wavelet can characterize resolution more accurately than itself for seismic data; ② with the increase of resolution,the dominant frequency and its bandwidth shift to the high frequency bandwidth within the effective bandwidth; ③ the characterization of resolution is complicated,diversiform and systematical.