物探化探计算技术2017，Vol.39Issue(1)：71-80,10.DOI:10.3969/j.issn.1001-1749.2017.01.11
基于地震偶极子波多重积分的初始阻抗模型建立方法
Initial impedance model establishment based on the seismic dipole wavelet and multiple integral methods
摘要
Abstract
The seismic impedance inversion requries a proper low-frequency reservoir model. The conventional inversion method is based on logging data and seismic velocity prediction to establish reservoir low-frequency model. Due to the reservoir parameters horizontally and vertically quickly change, the uncertainty and low precision of the seismic inversion by using conventional low frequency model are not avoidable. In order to overcome these problems, a dipole wavelet multiple integral constraint method (DWMIC) for seismic inversion initial model establishment is proposed in this paper. The seismic dipole wavelet of a reservoir is a comprehensive representation of reservoir's top and bottom reflection interface impedances and thickness and the seismic trace multiple integral combined well logging acoustic fractional spectrum data can obtain reservoir positions and seismic impedances. The DWMIC modelling method has been applied to a work area in Qaidam basin. The result shows that the model constructed by the DWMIC fits the real seismic profile quite well for a complex weathering crust fracture reservoir. It means the model can be fully reflected the geological horizon and structure characteristics on the seismic section, suggesting that it is possible to improve the stability and precision of seismic inversion.关键词
地震偶极子波/多重积分/频谱特征/储层厚度/初始阻抗模型Key words
seismic dipole wavelet/multiple integral/spectrum characteristics/reservoir thickness/initial impedance model分类
天文与地球科学引用本文复制引用
杜斌山,贺振华,王绪本,雍学善,刘应如..基于地震偶极子波多重积分的初始阻抗模型建立方法[J].物探化探计算技术,2017,39(1):71-80,10.基金项目
国家自然科学基金(41374111) （41374111）
国家重大专项(2016zx05007-006) （2016zx05007-006）
柴达木重大专项(2016E-03) （2016E-03）
