基于高阶多道同步挤压广义S变换的多属性融合储层预测技术研究及应用  

Research and application of reservoir prediction technology based on High-order Multi-channel Synchrosqueezing Generalized S-Transform and multi-attribute fusion

作　　者：赵慧言 高欢 严海滔 文冉 宋修艳 ZHAO Huiyan;GAO Huan;YAN Haitao;WEN Ran;SONG Xiuyan(Sichuan Changning Natural Gas Development Co.Ltd,Chengdu,Sichuan 610066,China;College of Geophysics,Chengdu University of Technology;Precise-energy Group,Chengdu,Sichuan 610000,China)

机构地区：[1]四川长宁天然气开发有限责任公司,四川省成都市610066 [2]成都理工大学 [3]北京普瑞斯安能源科技有限公司,四川省成都市610000

出　　处：《海相油气地质》2024年第2期207-214,共8页Marine Origin Petroleum Geology

摘　　要：时频域地震精细解释建立在高分辨率时频分析算法的基础上。为适应高精度勘探开发的要求,在多道同步挤压广义S变换(MSGST)的基础上,提出了高阶多道同步挤压广义S变换(HMSGST),进一步聚焦时频分辨率,提高储层预测的精准性。通过理论信号、理论加噪信号对比6种时频算法的计算结果,验证了HMSGST具有高时频分辨率,对复杂信号具有更好的刻画能力。以某三维工区海相砂岩为例,基于HMSGST在时频域沿主要油气储层(T2层)提取时间切片,开展频率衰减梯度、分频相干等属性分析以增强对短轴河道、次级断裂等目标的识别能力和烃类检测能力,进一步结合曲率属性开展RGB多属性融合精细雕刻。对于不同工区、不同地质条件的地震数据,需要进行HMSGST的参数分析,适合的参数是达到更为准确的计算结果的前提。The fine interpretation of time-frequency domain is based on high-resolution time-frequency analysis algorithms.Reviewed the evolution of time-frequency analysis algorithms including S-Transform(ST),Generalized STransform(GST),Synchrosqueezing S-Transform(SST),High-order Synchrosqueezing S-Transform(HSST),Synchrosqueezing Generalized S-Transform(SGST),Multi-channel Synchrosqueezing Generalized S-Transform(MSGST),it is claimed that MSGST has high vertical and horizontal resolution.To meet the requirements of highprecision exploration and development,a High-order Multi-channel Synchrosqueezing Generalized S-Transform(HMSGST)is proposed to focus on time-frequency resolution and improves the accuracy of reservoir prediction.By comparing the calculation results of six time-frequency algorithms with theoretical signals and theoretical noise signals,it is verified that HMSGST has high time-frequency resolution and better characterization ability for complex signals,but when the signal-to-noise ratio of the signal is below 70 dB,the time-frequency noise resistance of HMSGST begins to deteriorate,and the time-frequency spectrum of the effective signal is disturbed,making it difficult to accurately characterize the time-frequency characteristics of the signal.Taking the marine sandstone in a certain 3D survey as an example,based on HMSGST,time slices are extracted along the main oil and gas reservoirs(T2 layer)in the timefrequency domain.Due to the corresponding relationship between frequency and geological information,high seismic frequency is often more advantageous to the identification of thin reservoir.Attribute analysis such as frequency attenuation gradient and frequency coherence are carried out to enhance the ability of hydrocarbon detection and recognition of short axis river channels and secondary faults.Furthermore,RGB multi-attribute fusion including the former and curvature attribute is carried out with fine carving for geological details,especially in the time slice of T2 layer based on medium-high frequency

关 键 词：时频分析 高阶多道同步挤压广义S变换 时频分辨率 多属性融合 储层预测 

分 类 号：P631[天文地球—地质矿产勘探]