Comprehensive application of the seismic multi-attribute technique combination in the tectonic interpretation of the Luzhou shale gas block
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摘要: 泸州页岩气区块位于四川盆地内南部,经历多期构造演化,不仅发育非常复杂的断裂,垂向上还发育多套滑脱层,因此构造具有多期次、多走向、多层系等特征。针对研究区的构造解释难点,集成了一套地震多属性技术组合,即地震多属性优选和属性融合技术辅助断层解释、构造异常值属性识别微构造、地震属性沿层切片技术分析构造时空演化特征、多次叠加蚂蚁追踪属性技术预测裂缝发育。应用该技术组合,完成了区内复杂断层的精细解释,有效刻画了微构造发育特征,捋清了区内的构造期次和展布,提高了裂缝预测精度,描述了裂缝发育特征,为下一步的平台部署提供坚实的数据和基础。Abstract: The Luzhou shale gas block,which is located in the southern Sichuan Basin,has undergone multi-stage tectonic evolution and has complex faults and multiple sets of vertical detachment layers,forming the characteristics of multiple stages,multiple strikes,and multiple layers.To overcome the difficulties with the tectonic interpretation of the study area,this study combined a set of seismic multi-attribute techniques,namely using seismic multi-attribute optimization and attribute fusion technique to assist fault interpretation,using structural anomaly attribute to identify microstructures,using seismic attribute slicing technique to analyze the characteristics of tectonic temporal and spatial evolution,and using multi-superposition ant tracking attribute technique to predict fracture development.Using this technique combination,this study completed the fine-scale interpretation of complex faults in the area, effectively characterized the development of microstructures,clarified the tectonic stages and distribution in the area,improved the fracture prediction accuracy,and described the development characteristics of fractures.The results of this study will provide solid data and a foundation for the next platform deployment.
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