分频段地震属性优选及砂体预测方法——秦皇岛32-6油田北区实例  

Frequency-segmented seismic attribute optimization and sandbody distribution prediction:an example in North Block,Qinghuangdao 32-6 Oilfield

作　　者：李伟[1] 岳大力[1,2] 胡光义 范廷恩 方晓刚 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]油气资源与探测国家重点实验室,北京102249 [3]中海油研究总院,北京100028 [4]贵州省非常规油气资源工程技术研究中心,贵州贵阳550081

出　　处：《石油地球物理勘探》2017年第1期121-130,共10页Oil Geophysical Prospecting

基　　金：国家自然科学基金青年科学基金项目(40902035);教育部博士点新教师基金项目(20090007120003);国家科技重大专项(2011ZX05024-001-04)联合资助

摘　　要：以秦皇岛32-6油田新近系明化镇组下段为研究对象,综合测井与地震资料,针对薄层砂体与厚层砂体不同的地震属性响应特征,采用了"先优选地震资料频段,再提取并优选地震属性"的方法进行砂体预测。针对NmⅠ-1小层薄层砂体,提取了高频信号的地震属性,针对NmⅠ-3小层厚层砂体,提取了低频信号的地震属性;进而对提取的地震属性进行优选,并结合测井解释,在沉积模式的指导下预测了砂体及沉积相的展布。研究结果表明:该方法有效降低了调谐厚度以及地震数据中的低频信号对砂体预测的限制,明显提高了地震属性与砂体厚度的相关性,从而提高了砂体及沉积相的预测精度,对地震资料品质较好地区的储层预测具有一定的指导意义。Based on well logging and seismic data,some research of Minghuazhen Formation in Qinhuangdao 32-6 Oilfield is conducted.According to different seismic characteristics of thick sandbodies and thin sandbodies,we propose a new approach to sandbody prediction,which includes two steps: first choose a frequency segment,then optimize seismic attributes.For thin sandbody of Layer NmI-1,we pick up attributes of high frequency seismic signals,and for thick sandbody of Layer NmI-3 we pick up attributes of low frequency seismic signals.Then according to optimized seismic attributes and well interpretation,we predict sandbody distribution and sedimentary facies under the guidance of sedimentary facies model.The results indicate that the proposed approach can effectively reduce the impact of tuning thickness,and significantly improve the correlation between seismic attributes and sandbody thickness. © 2017, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.

关 键 词：小波分频 分频数据体融合 属性优选 调谐厚度 砂体预测 

分 类 号：P631[天文地球—地质矿产勘探]