纵波构造控制的共检波点叠加道相关算法研究与应用

发布时间：2018-02-22 01:25

本文关键词： CRP叠加道相关算法剩余静校正纵横波速度比 “零空间”漂移　出处：《石油地球物理勘探》2016年04期 　论文类型：期刊论文

【摘要】：常规纵波构造控制的共检波点叠加道相关算法在处理复杂地区低信噪比、地下构造起伏较大的转换波地震资料时,容易出现"纵横波叠加剖面构造层位不匹配,导致转换波的构造校正量计算不准确"和"算法收敛于局部极值,叠加剖面出现零空间漂移"的现象。本文针对常规算法的此缺点,分析了该算法的理论原理,提出增强纵横波叠加剖面匹配质量和压制"零空间"现象的改进措施:使用纵波共检波点叠加剖面的构造层位来匹配控制转换波共检波点叠加剖面的构造层位,达到增强纵波CMP叠加剖面和转换波ACCP叠加剖面的层位匹配一致性的目的,提高计算地下构造校正量精度,进而估算较准确的纵横波速度比值;计算共检波点叠加道与拉平后的转换波构造层位之间的绝对静校正量,以克服静校正处理的"零空间"漂移现象。实际转换波资料的应用表明,改进方法能够进一步提高常规纵波构造控制的CRP叠加道相关算法的剩余静校正处理适应能力。
[Abstract]:The common detection point stack correlation algorithm controlled by conventional P-wave structure is easy to occur when dealing with converted wave seismic data with low signal-to-noise ratio (SNR) and large fluctuation of underground structures in complex areas. As a result of the inaccurate calculation of the structural correction of the converted wave, and the phenomenon that the algorithm converges to the local extremum and the stacking section has zero space drift, this paper analyzes the theoretical principle of the algorithm in view of this shortcoming of the conventional algorithm. The improvement measures of enhancing the matching quality of P-S wave stack profile and suppressing the phenomenon of "zero space" are put forward. The structural layer position of the P-wave common detector point stack section is used to match and control the tectonic layer position of the converted wave common detection point stack section. In order to enhance the consistency of horizon matching between P-wave CMP stack profile and converted wave ACCP stack profile, the accuracy of calculating the correction amount of underground structure is improved, and the accurate velocity ratio of P-S wave is estimated. In order to overcome the phenomenon of "zero space" drift of statics processing, the absolute static correction between the stacking channel of common detection point and the levelling layer of converted wave structure is calculated. The application of the actual converted wave data shows that, The improved method can further improve the residual statics processing adaptability of the CRP stack correlation algorithm controlled by conventional P-wave construction.
【作者单位】：油气藏地质及开发工程国家重点实验室;中国石化西南油气分公司;
【分类号】：P631.4

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