时移地震叠前差异数据表征油藏参数变化方法研究

项目名称： 时移地震叠前差异数据表征油藏参数变化方法研究

项目编号： No.41274137

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 王守东

作者单位： 中国石油大学（北京）

项目金额： 70万元

中文摘要： 时移地震利用两次观测的地震数据差异表征油藏参数的变化，是开发地震的重要手段，目前主要利用叠后时移地震数据或AVO数据表征油藏参数的变化。由于叠加等处理，精度降低，限制了时移地震在复杂地区的应用。本项目拟基于叠前炮集差异数据研究油藏参数变化的表征问题。首先基于粘弹性波动理论，建立储层弹性参数变化的时移地震叠前差异响应，进而研究储层弹性参数变化的全波形反演方法，针对差异数据全波形反演的不稳定、子波未知和计算量大的问题，探索压缩感知约束反演、不依赖子波反演和局部参数反演方法。基于油藏岩石物理理论，研究弹性参数差异表征储层流体饱和度和压力等油藏参数变化的关系。在此基础上，研究时移地震叠前差异数据表征油藏参数变化的方法，完善时移地震波动方程全波形反演进行油藏监测的理论，有效提高时移地震监测油藏参数变化的能力和水平。

中文关键词： 时移地震；差异数据；波动方程；全波形反演；压缩感知

英文摘要： Time-lapse seismic characterize the reservoir parameter changes using the two seismic data, is the important means of development seismic. At present the poststack and AVO data is used to characterize the changes of reservoir parameter. Because of the stack and other processing, the accuracy of these data is very low and this greatly limits the application of time-lapse seismic. The project plans to study the characterization problem of reservoir parameter changes based on prestack difference shot gather data. Based on the Viscoelastic wave theory, the equation between prestack time-lapse seismic difference data and reservoir elastic parameter changes will be constructed, and then the full waveform inversion method of reservoir elastic parameter changes will be studied. Aiming at the the stability problem, wavelet problem and computing cost problem in the full waveform inversion of difference data, the compressed sensing constrained inversion method, source-independent inversion method and local parameter inversion method will be studied. Based on the reservoir rock physics theory, the relationship that reservoir elastic parameter varies with reservoir parameters will be studied. Mainly study the relations that elastic parameters varies with the reservoir fluid saturation and pressure change. On this basis,

英文关键词： time-lapse seismic；differential data；wave equation；full waveform；compressed sensing