饱和剩余振幅分析方法的研究及应用——以莺歌海盆地为例  

Research and application of saturated residual amplitude analysis:A case study of Yinggehai Basin

作　　者：郭伟 周凡 廖键 GUO Wei;ZHOU Fan;LIAO Jian(Zhanjiang Branch of CNOOC(China)Co.,Ltd.,Guangdong Zhanjiang524057,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《非常规油气》2024年第3期77-83,共7页Unconventional Oil & Gas

基　　金：国家“十四五”重大科技专项“中国近海新区新领域勘探技术”(KJGG2022-0304)。

摘　　要：为了理清目标评价中振幅的影响因素,识别莺歌海盆地的流体性质,基于保真保幅资料,开展了地震振幅的研究,建立了储层孔隙度、含气性、厚度、地层组合、子波相位与地震振幅响应的关系,形成了如下认识:1)随着孔隙度的增大,流体的振幅均逐渐增大;2)振幅在薄层的调谐厚度处最大,且振幅与厚度存在一定的线性关系;3)地层组合对振幅的影响,主要受地震波相互干涉;4)子波相位介于0°~90°时,振幅随其值的逐渐增大而增大,并且子波相位为90°时处最大;但介于90°~180°时,振幅逐渐减小,介于180°~360°重复上述规律。该成果认识获取了真实可靠的地层振幅信息,为勘探井位钻探提供了可靠技术支撑。To clarify the influencing factors of seismic amplitude in target evaluation to identify the fluid properties of Yinggehai Basin,this article researched the seismic amplitude based on fidelity and amplitude preservation data and established the relationship between the seismic amplitude response and the reservoir porosity pore properties,gas-bearing properties,thicknesses,stratigraphic combinations,and wavelet phases.The following understanding has been formed:1)The seismic amplitude of fluids gradually increases as porosity increases;2)The seismic amplitude of the tuned thickness is the largest for the thin layer,and there is a certain linear relationship between the amplitudes and thicknesses;3)The mutual interference of seismic waves mainly influences the effect of stratigraphic combinations on amplitudes;4)The amplitude value gradually increases when the wavelet phase rises between 0°to 90°and reaches the largest when the wavelet phase is 90°;then decreases between 90°to 180°.Moreover,the above pattern repeats between 180°to 360°.The above achievements have obtained true and reliable stratigraphic amplitude information,providing reliable technical support for drilling exploration wells.

关 键 词：莺歌海盆地 饱和剩余振幅 地震振幅 厚度 地层组合 子波相位 

分 类 号：P315[天文地球—地震学]