川中海相碳酸盐岩层系小型走滑断裂地震识别
马峰 , 汪泽成 , 雷明 , 付小东 , 文龙 , 刘雄志 , 李文正 , 周刚
地球科学 ›› 2023, Vol. 48 ›› Issue (06) : 2204 -2220.
川中海相碳酸盐岩层系小型走滑断裂地震识别
Seismic Identification of Small Strike-Slip Faults in Marine Carbonate Strata in Paleouplift Area of Central Sichuan Basin
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针对四川盆地川中古隆起高磨三维区震旦系-古生界二叠系海相碳酸盐岩层系不同尺度的断裂,特别是小型走滑断裂在地震资料上难以识别和解释的难点,利用地震数据及其属性携带的断裂结构信息、不连续性变化信息、裂缝带信息,优选应用构造导向滤波技术、本征值相干技术、分频相干与分方位相干技术、最大正/负曲率属性技术、蚂蚁体技术、最大似然断裂识别技术、PADD(poststack amplitude direction decomposition,叠后振幅方位分解)技术,分层系、分方位、分尺度逐级精细识别和描述了地震波同相轴错断型断裂、同相轴挠曲型断裂、裂缝型微小断裂,以及岩溶塌陷体,并应用成像测井裂缝信息定性验证不同尺度断裂方位和断裂密度,井震吻合效果好.集成形成“三分八步” 逐级控制下的断裂地震识别技术方法系列.并根据地质模型和断裂模式判别了走滑断裂,进行了分级,总结了川中高磨区6种走滑断裂构造样式.
四川盆地 / 川中古隆起 / 海相碳酸盐岩 / 走滑断裂 / 地震识别 / 构造
Sichuan basin / central Sichuan paleouplift / marine carbonate strata / strike slip fault / seismic identification / tectonics
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“十三•五”国家油气专项(2017ZX05008005)
中国石油天然气股份有限公司重点科技项目(2018A-0105)
基础性与前瞻性项目(2021DJ1503)
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