碳酸盐岩缝洞型储层“弱反射”特征的地震多属性识别  

Seismic multi-attributes recognition for carbonate fractured-vuggy reservoirs with “weak reflection” characteristics

作　　者：李弘[1] 窦之林[2] 王世星[1] 唐金良[1] 朱童[3] 

机构地区：[1]中国石油化工股份有限公司石油物探技术研究院,江苏南京211103 [2]中国石油化工股份有限公司西北油田分公司,新疆乌鲁木齐830011 [3]中国地质大学(武汉),湖北武汉430074

出　　处：《石油物探》2014年第6期713-719,共7页Geophysical Prospecting For Petroleum

基　　金：国家科技重大专项(2011ZX05049-001-003);中国地质大学(武汉)地球内部多尺度成像湖北省重点实验室基金项目(SMIL-2014-04)联合资助

摘　　要：利用常规的振幅类地震属性难以有效识别塔河油田奥陶系碳酸盐岩缝洞型储层的"弱反射"特征。为此,首先建立了几种不同类型的缝洞储层数值模型,通过正演模拟明确地震"弱反射"特征与碳酸盐岩缝洞储层的相关性;然后针对见油井点缝洞储层段地震资料进行"弱反射"特征识别的敏感地震属性分析,证实了利用频率衰减属性能够识别"红波谷"反射特征的缝洞储层;最后采用频率衰减属性与反射强度属性相结合的思路,构建出反射强度调谐累计频率衰减属性,能够同时实现对"串珠状"和"弱反射"特征的碳酸盐岩缝洞型储层进行有效识别。It is difficult to identify the ＂weak reflection＂ characteristics of Ordovician carbonate fracture-vuggy reservoir by common seismic amplitude attributes in Tahe Oilfield.Therefore,we built some types of fracture-vuggy reservoir models to identify the relativity between the ＂weak reflection＂ characteristics and the fracture-vuggy reservoirs by forward modeling.Then sensitive seismic attributes analysis with near wellbore seismic traces was performed for the ＂weak reflections＂ characteristics recognition,which proved that frequency attenuation attribute was effective for identifying the fracture-vuggy reservoirs with ＂red trough＂ reflection.Finally,by combining the frequency attenuation attribute and reflection intensity attribute,reflection intensity tuning cumulative frequency attenuation attribute was constructed,which can effectively identify the ＂weak reflections＂ and ＂string＂ characteristics of carbonate fracture-vuggy reservoirs at the same time.

关 键 词：塔河油田 碳酸盐岩储层 弱反射 红波谷 频率衰减属性 反射强度属性 

分 类 号：P631.4[天文地球—地质矿产勘探]