AVO技术在识别充填流体溶洞中的应用  

THE APPLICATION OF AVO TO THE PREDICATION OF WATER-ERODED CAVES FILLED WITH LIQUIDS FOR CARBONATE RESERVOIRS

作　　者：孙海宁[1] 王晓梅[2] 刘来祥[3] 

机构地区：[1]胜利油田东辛采油厂地质研究所,山东东营257094 [2]北京大学,北京100084 [3]中国石油化工股份有限公司石油勘探开发研究院,北京100083

出　　处：《物探与化探》2008年第4期397-400,共4页Geophysical and Geochemical Exploration

摘　　要：寻找到充填流体的大型洞穴是碳酸盐岩油藏预测十分有意义的工作。塔河油田的试验表明,应用AVO技术可以有效地鉴别溶洞是否充填流体。溶洞充填流体之后,由于碳酸盐岩与流体之间存在很大的纵波波阻抗差异会形成强的纵波反射系数;同时,又由于流体内不传播横波,溶洞壁(包括顶低面)是横波的绝对反射界面,因而会形成强的横波反射。换句话说,充填流体溶洞既能形成强的纵波,又能形成强的横波。AVO分析对叠前地震数据进行弹性反演,从中提取出与横波有关的属性来指示充填流体的溶洞。The key of searching for carbonate reservoirs is to find large water-eroded caves filled with liquids. The AVO analysis can identify the nature of the cavern filling in the Tahe Oil Field. Where the water-eroded cave filler is liquid, it has intense S - wave. This is because the S-wave can not be spread in liquids, hence the cavity boundary is the absolute reflection of S-wave. In other words, where the cavity filler is liquid, it has intense reflection of S-wave and P-wave. The AVO technique can thus be used to obtain elastic inversion data. The S-wave attributes can be extracted and the water-eroded cave filled with liquids can be identified.

关 键 词：AVO技术 弹性波属性 溶洞型油藏 流体的识别 

分 类 号：P631.4[天文地球—地质矿产勘探]