一种井震融合求取反Q滤波Q体的方法  

A method for the Q estimation of inverse Q filtering based on well seismic fusion

作　　者：何书梅[1] 吴吉忠 魏朋朋[1] 杨倩倩 吴吉厚 HE Shumei;WU Jizhong;WEI Pengpeng;YANG Qianqian;WU Jihou(Research Institute of exploration and development, Dagang Oilfield Branch of CNPC,Tianjin 300280,China;Bohai Energy Research Institute of Northeast Petroleum University, Qinhuangdao 066004,China;Beijing furuibao Energy Technology Co., Ltd., Beijing 100170,China)

机构地区：[1]中国石油大港油田分公司勘探开发研究院,天津300280 [2]东北石油大学环渤海能源研究院,秦皇岛066004 [3]北京福瑞宝能源科技有限公司,北京100170

出　　处：《物探化探计算技术》2020年第4期442-450,共9页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：中国石油天然气股份有限公司重大科技专项(2018E-11);东北石油大学引进人才科研启动专项资金(1305021889)。

摘　　要：粘弹性介质的吸收衰减影响了地震波的动力学特征,而反Q滤波技术是补偿地层吸收的主要方法。在常规处理中,品质因子往往通过扫描获得,缺乏客观标准。从地震资料求得的品质因子Q值是一种瞬时Q,难以应用到反Q滤波中,影响了反Q滤波的最终效果。这里提出基于井震融合求取品质因子Q值的方法,先用VSP井资料提取较准确Q值,用它反映出的地层结构,作为地震资料求取Q值的时窗,计算地层Q体;以VSP资料求取的Q曲线为初值,制作粘弹性合成记录,调节Q值使正演记录和井旁地震道达到最佳匹配,得到井震联系的最佳Q曲线;最后用井震最佳匹配的Q曲线标定地震资料求取的Q体,使Q体的数值在合理的范围内。这套井震融合求取品质因子的方法,在东部某油田实际资料中得到了有效地验证。The absorption attenuation effect of viscoelastic medium affects the dynamic characteristics of seismic waves.Inverse Q filtering is the main method to compensate the formation absorption.In the conventional process,Q is often determined by scanning,the lack of objective criteria.The quality factor Q value obtained from seismic data is a kind of instantaneous Q that can't be compared with the standard.It is difficult to apply to the anti Q filter which affects the final effect of the anti Q filter.Therefore,this paper proposes a method based on the combination of well and seismic to obtain the quality factor Q.Using VSP data extraction more accurate Q value reflects the formation of structure and explains Q corresponding to the horizon,as strike a Q value of seismic data window,calculate Q.Taking the Q curve quality control seismic data obtained from the VSP data to obtain the calculation parameters of the Q body,so that the longitudinal trend of the Q body is reasonable.The VSP curve is then used to obtain the Q curve which is used to calibrate the seismic data to obtain the Q body,so that the numerical value of the Q body is in a reasonable range.The method of calculating the quality factor of the wells in real data is proved to be effective.

关 键 词：品质因子 VSP资料 粘弹性正演 井震融合 

分 类 号：P631.4[天文地球—地质矿产勘探]