【摘要】 由于受地震资料纵横向分辨率的限制,孔洞储集层空间体积的估算变得较困难。常用方法是通过建立一个孔洞储集体校正量板,进行孔洞储集空间的估算,该方法会受一系列复杂因素的影响。在考虑实际孔洞储集体的不同影响因素的情况下,通过物理模型技术形成了碳酸盐岩孔洞型储集空间的有效估算方法。根据实际碳酸盐岩储层的地质地震条件,构建了一个不同上覆层结构、不同孔洞大小、不同充填物等的复杂三维物理模型;通过室内三维地震数据采集、处理,分析了物理模型数据的地震属性,并进行优选;通过设置一个门槛值,对地震属性体使用三维可视化雕刻技术,保留了孔洞储集体的有效地震信息,再将其转化为实际的地质体体积,建立起孔洞储集体雕刻体积与真实体积的关系;上覆层情况越复杂,孔洞雕刻体积越大,洞内充填物阻抗值越小,放大效应越明显。更多还原

【Abstract】 Due to limitation of seismic vertical and horizontal resolution,it is very difficult to estimate cave reservoir volume.The commonly used method is to establish the calibration curve of cave reservoir.But this method is affected by a few complicated factors.Considering different influence factors of cave reservoir,we propose an estimation method of carbonate cave-reservoirs volume based on physical model.According to seismic and geological conditions of the actual carbonate reservoir,a complex three-dimensional physical model is built,which is contained by different overlyingstructure,different cave size,and different fillings.Then 3Dseismic data is processed and seismic attributes of the physical model are chosen.After that,3Dvisualization is used to sculpt seismic attribute bodies,so seismic information of cave reservoir is retained.This seismic attribute volume is converted to the volume of actual geologic body.In the end,we obtain the relationship between the seismic attribute volume and the geologic volume.It is found that when the overlying layers are more complex,the bigger cave volume is,the smaller impedance the fillings in it have.更多还原