地层圈闭油藏是一种重要的隐蔽油藏类型，其超剥线的准确识别难度大。蚁群算法对地震资料的相似性、差异性具有较强敏感性，能有效识别出地层地震响应的相似性及其顶底板地震响应的差异性。通过对超覆型与剥蚀型的地质模型进行正演可以看出，目标层位的顶底板岩性、地层倾角、储层厚度等地质因素都将对地层超剥点的解释产生影响，其中合成地震记录解释的误差较大，而基于蚁群算法获得的地震剖面解释误差相对更小。济阳坳陷构造带中的草桥北斜坡沙河街组与义和庄凸起中古生界超剥带的识别实例，证实蚁群算法反映的地层受剥蚀现象清晰，剥蚀点误差更小，刻画的地层结构更趋合理。%Stratigraphic-trap oil reservoir is an important kind of subtle oil reservoirs. The identification of its overlap-denudation line is rather hard. While the ant colony algorithm has stronger sensitiveness on seismic data similarity and otherness, can identify stratum seismic response similarity and its roof and floor seismic response otherness. Through forward modeling of overlap, denudation typed geological models, can find out geological factors of target horizon roof and floor lithology, dip angle, reservoir thickness etc. impacting stratum overlap-denudation point interpretation. In which, interpretation error of synthetic seismic record is larger, while the error of seismic section from ant colony algorithm is relatively smaller. Through middle Paleozoic overlap-denudation belt identification cases of the Caoqiao north slope Shahejie Formation and Yihezhuang doming in the Jiyang depressing have confirmed that the ant colony algo⁃rithm can reflect strata denudation more clear, denudation point error even smaller, depicted stratum structure more reasonable.
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