流体替代的地震反射振幅特征分析  

AN ANALYSIS OF THE AMPLITUDE CHARACTERISTICS OF SEISMIC REFLECTION DURING FLUID REPLACING

作　　者：汪勇[1,2] 阳和华[2] 桂志先[2] 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074 [2]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023

出　　处：《物探与化探》2012年第6期991-995,共5页Geophysical and Geochemical Exploration

基　　金：国家"十一五"重大科技专项课题(2008ZX050000230401)

摘　　要：在油田的开发阶段,注水或注气开采会引起储层物性的变化,同时储层所含流体也会发生改变,这就为时移地震监测提供了可能。笔者主要基于Gassmann方程,详细地论述了孔隙流体替代储层地震波速度和密度变化规律,并且根据预测的结果建立了含水饱和度变化地震地质模型。最后通过对该模型的振幅类地震属性分析,对地震属性进行了优选,找到了适合本工区时移地震监测的敏感性振幅属性,为预测工区剩余油的分布提供了基础。In the oil field development stage, water or gas injection mining will change reservoir properties and the fluid inside the res- ervoir,which may provide a possiblity for time-lapse seismic monitoring. Mainly based on Gassmann equation, the authors discussed in detail the variation regularity of seismic velocity and density when the reservoir pore fluid is replaced, and established a seismic geolog- ical model for water saturation variation according to the forecast resutt. Through anatyzing and optimizing the amplitude attributes ex- tracted from the model, the sensitive time-lapse seismic attributes suitable for this area was finally found. The result provides a basis for predicting the distribution of remaining oil.

关 键 词：时移地震 GASSMANN方程 含水饱和度 地震属性 

分 类 号：P631.4[天文地球—地质矿产勘探]