【摘要】 讨论了连井井间地震资料反演方法。实现反演的基本原理是:对深度域井间地震资料进行初步解释;建立精确的速度模型;在对井间地震剖面进行深时转换时采用sinc插值函数实现波形保真;利用对地面地震资料的认识来落实时间域井间地震资料的反射特征;利用地面地震资料良好的空间连续性弥补井间地震剖面的"漏斗"缺陷和井间资料之间横向对比性的不足;在井间地震和地面地震井旁道精细标定中,通过一致的时深关系来实现两种地震资料之间的匹配,使井旁道的标定更加合理;在利用稀疏脉冲反演方法进行连井井间地震资料反演时,通过增强横向约束保证反演波阻抗剖面的连续性。反演结果与井间地震剖面吻合较好,砂体展布范围清晰。更多还原

【Abstract】 The impedance inversion method of multi-crosswell seismic da- ta is discussed.The principles are as follows:①preliminary inter- pretation is carried out on crosswell seismic data in depth domain to establish an accurate velocity model;②sinc interpolating function is used in depth-time conversion to realize waveform fidelity;③the recognition of surface seismic data is utilized to ascertain the reflec- tion characteristics of crosswell seismic data in time domain;④good spatial continuity of surface seismic data is adopted to retrieve the"hopper"defect in crosswell seismic profiles and the deficiency of lateral contrast between crosswell seismic data;⑤in fine calibra- tion of well-side traces of crosswells and surface seismic data,coin- cident time-depth relation is used to match two seismic data so as to make the calibration more reasonable;⑥in multi-crosswell seismic data inversion by sparse spike inversion method,lateral restraints are strengthened to ensure the continuity of inversed wave imped- ance profile.The inversion results match well with crosswell seis- mic profile,and the distribution range of sand bodies is clearly seen.更多还原