基于地震波衰减的特征属性重构方法

Method of characteristics attributes reconstruction based on seismic wave attenuation

（中国石油化工股份有限公司胜利油田分公司物探研究院，山东东营257022）

Wei Wen,Geophysical Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257022, China

According to apparent absorption and attenuation characteristics of the hydrocarbon-bearing reservoir, a characteristic attribute reconstructing method based on seismic wave attenuation has been developed to identify the reservoir fluids. The seismic absorption and attenuation theory is the foundation of this method. A seismic characteristic attribute function has been deduced by changing the strata quality factor expression. According to this function, we reconstruct new seismic attributes by using the common seismic attributes of amplitude class, frequency class and absorption & attenuation class. Based on the designed viscoelastic medium model, the examine result shows that the new attributes can emphasize the changing characteristics of reservoirs fluid-bearing and verify the new method. Applied the technique to Lao168 well block to identify the reservoir hydrocarbon-bearing of channel sandstone, we achieved a good result that the distribution of the fluid was accurately depicted.