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作 者:刘贺[1,2] 刘洪[1] 刘红伟[1,2] 秦月霜[3] 牛彦良[3]
机构地区:[1]中国科学院地质与地球物理研究所油气藏综合地球物理重点实验室,北京100029 [2]中国科学院研究生院,北京100049 [3]中国石油大庆油田有限责任公司,大庆163712
出 处:《地球物理学进展》2009年第4期1431-1436,共6页Progress in Geophysics
基 金:国家"973"重点基础研究发展计划项目(2007CB209603);国家自然科学基金项目(40830424)资助
摘 要:河流相储层、碳酸盐岩孔缝洞密集带等地层,地震同相轴不具有层状特征,可形象地称为具有复杂网状特征,利用层状地层模型难以精细描述井外地层.传统的宽带约束反演,其目标函数一般含有一个层状的初始模型、离散光滑约束、稀疏约束和线性拟合函数约束.利用这种层状的初始模型进行井震匹配,其高频信息主要来源于井资料插值得到的层状地层模型,井之间地震信息很难起作用.不仅如此,其计算量较大,且不易调节层状信息与稀疏约束反映的地震资料中的非层状信息的比例,难以适应的复杂网状地层的井震信息融合.本文利用地震资料构造反假频基函数以描述复杂网状地层,避免了对层状模型的过分依赖,使得联合重建的信息在井旁与测井资料拟合较好,在井外能充分地反映地震资料所含非层状信息.本文利用大庆下白垩地层扶余油层的河流相资料进行实验,证实了方法的快速和有效性.The seismic event has non-layered structure in fluvial faces reservoir and carbonate rock, we call this structure as complicated network structure. It's difficult to depict this type structure precisely using layered strata model. The objective function of the broad-band restrained inversion generally includes a layered initial model, discrete smoothing restrain, sparse restrain and linear-analog function, the high frequency information of this method dominantly derives from the layered initial model which is generated by interpolate between wells, the information of the seismic data between the wells has little effect on the merging. Besides, its computation is time-consuming, and it's difficult to adjust layered information and non layered information of sparse-restrained seismic data, so it isn't fit for well-logging and seismic information mergence of strata with complicate feature. This paper use seismic data to generate anti-alias base functions to depict the complicated network strata, it avoid relying on the layered model and can reflect the non-layered information of the seismic data. This paper test the method using seismic data of the Lower Cretaceous Fuyu oil layer, approves that the method is fast and efficient.
分 类 号:P631[天文地球—地质矿产勘探]
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