连井井间地震资料反演中的关键问题分析  

Analysis of key problems in multi-crosswell seismic data inversion

作　　者：曹丹平[1] 印兴耀[1] 张繁昌[1] 孔庆丰[2] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061 [2]中国石油化工股份有限公司胜利油田分公司物探研究院,山东东营257022

出　　处：《石油物探》2008年第5期455-460,共6页Geophysical Prospecting For Petroleum

基　　金：国家重点基础研究发展计划973项目(2007CB209605)资助

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。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.

关 键 词：井间地震 波阻抗反演 深时转换 精细标定 相似性分析 地震资料匹配 

分 类 号：P631.4[天文地球—地质矿产勘探]