下三叠统飞二鲕滩储层是兴隆场Ⅰ-Ⅱ期连片三维主要产层之一,为在该区寻找新的含气目标,针对飞二鲕滩储层建立了一套合理的预测方法.通过储层建模与正演总结研究区主要沉积相的地震识别标志,依据地震属性和波阻抗反演技术对飞仙关鲕滩储层进行了预测,并对储层的厚度和孔隙度进行定量化分析,认为本区鲕滩储层岩性圈闭成藏研究不深,下一步应结合已钻井的测试结果加强飞仙关组的成藏研究,以降低勘探开发的风险.
With the increasing needs of exploration precision, seismic anisotropy has to be taken as a critical issue. Thus the research of seismic wave propagation characteristic of the anisotropic media has a certain value. Based on the theory of the weak anisotropy proposed by Thomsen, this paper analysis the effects of Thomsen anisotropic parameters on three body waves of weak anisotropic VTI media by numerical calculating the theoretical model. The results show that the anisotropic characters of qP-wave at larger、intermediate and small angle depend on e、δ respectively, the anisotropic characters of qSV-wave at intermediate angle depend on (e-δ), the anisotropic characters of qSH-wave at large angle depend on γ,and the anisotropic characters of group velocity which may represent cusps is more obvious than phase velocity. Through these research and analysis, we further understand the law of phase velocity and group velocity according to the anisotropy parameters in the weak anisotropic media.
4D seismic exploration technology has been developed rapidly in recent years.However,two measurement data observed repeatedly are of non-uniformity because of various factors.These differences exist mainly in four areas: Signal time-delay、energy difference of signal、bandwidth difference of signal、phase difference of signal.In order to effectively protect the differences resulted from fluid and oil-gas reservoir and remove the differences resulted from others factors,we need calibrate the monitor data.This article describes the theory of cross-equilibration technique,and applies it in the 4D seismic data.The result shows that the non-anticipate differences had been removed well,which further confirms the correctness and effectiveness of this technique.
下三叠统飞三鲕滩储层为川东北宣汉-达县地区主要产气层段,为在该区寻找新的含油气构造,以"三高"处理的地震资料为基础,针对飞三鲕滩储层建立了一套综合预测方法:通过储层地质建模与正演,建立飞仙关组鲕滩储层地震响应模式;借助地震属性分析和地震约束反演等技术,对飞仙关组(T1f3-1)鲕滩储层进行了预测,对储层的厚度及孔隙度进行定量化分析,并针对重点圈闭进行烃类检测,为钻探井位的确定提供了重要的地质依据.
