起伏地层地震正演模拟分析

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关键词：碳酸盐岩；地震正演模型；正演计算；弹性波方程；潜山地区

中图分类号：P631.4 文献标志码：A 文章编号：1003-5168（2025）23-0103-05

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.23.018

Seismic Forward ModelingAnalysis forUndulatingStrata

GUAN Yekun1，² LIUYizhuo³ GUI Zhixian1，2 （1. College of Geophysics and Petroleum Resources，Yangtze University， Wuhan 4301Oo， China; 2.Key Laboratory of Oil and Gas Resources and Exploration Technology， Mimnistry of Education （Yangtze University）， Wuhan 43O1O0，China; 3.The First Oil Production Plant of Changqing OilfieldBranch Company，Yan'an 716ooo， China）

cific block in the Zhuanghai buried-hill region，a geological model was established for targeted forward modeling.[Findings]Under the conditionsofa 5m receiver interval，a 50Hz dominant source frequency，and a P-wave velocity difference of 200m/s between adjacent layers，the numerical simulation results indicate that the seismic response can clearly delineate the interfaces of various strata in the Zhuanghai buried-hill region.Notably，shalelayerscanbeeffectively identified，with their thickness and spatial distribution accurately constrained.[Conclusions] Compared to using conventional default parameters，forward modeling utilizing elastic parameters derived from numerical simulation produces seismic responses that more clearly reveal subsurface features such as stratigraphic boundaries，faults，and fracture-cavity systems.Thisapproach demonstrates significant advantages，particularly inaccurately delineating the thickness and spatial distribution of various reservoirs.

Keywords： carbonate rock; seismic forward modeling; forward calculation; elastic wave equation;buriedhill area

0 引言

碳酸盐岩是一类主要由自生方解石、白云石等碳酸盐矿物构成的沉积岩，在我国广泛分布于震旦纪至第三纪的海相地层中，其在西南地区尤为发育和典型。（剩余3771字）