摘要
利用断层敏感属性识别断层的精度和适用性有限,主要可识别主干大尺度断层.对于中、小尺度断层,由于欠缺足够的分辨率、连续性,预测的断层数量不准,如果仅依靠单一属性预测断层的可信度较低.此外,长期以来断层解释以人工为主,严重影响工作效率.为此,为了突破单一方法的极限,从而识别更多的断层,改善断层预测的分辨率和连续性,消除"双边界"效应,创建了高精度人工智能断层预测流程,以逐级提升断层解释精度和效率.首先,开展叠后地震资料预处理,提高原始地震数据的品质,为生成高精度断层属性建立基础;其次,进行人工智能断层预测,为了进一步提升预测精度,对人工智能预测结果进行"断层增强—骨架化—蚂蚁体"处理;再次,利用多属性融合丰富多尺度断层信息;最后,依托高精度断层预测结果,结合智能化技术提高断层解释效率.将高精度人工智能断层预测流程用于渤海湾盆地X区实际资料,预测结果表明,剖面正断层以阶梯状、"Y"式组合为主,大部分为SE倾向,与断陷同期形成.平面上断层优势方位为NE向,与近SN向次级断层构成"梳状"组合,表明该区发生伸展变形的同时,可能遭受左旋走滑作用.
Abstract
Using fault-sensitive attributes to identify faults is limited in accuracy and applicability,mainly able to identify major large-scale faults.As medium and small-scale faults lack sufficient resolution and continuity,the predicted number of faults is inaccurate.The credibility of predicting faults solely relying on a single attribute is relatively lower.In addition,for a long time,fault interpretation has been mainly done manually,seriously affect-ing working efficiency.To overcome the limitations of a single method,thus identifying more fault layers,im-proving the resolution and continuity of fault prediction,and eliminating the"double boundary"effect,this pa-per creates a high-precision artificial intelligence fault prediction process to gradually improve the accuracy and efficiency of fault interpretation.Firstly,post-stack seismic data preprocessing is carried out to improve the quality of original seismic data and establish a foundation for generating high-precision fault attributes.Sec-ondly,artificial intelligence fault prediction is carried out to further improve the prediction accuracy and process the artificial intelligence prediction results in the"fault enhancement-skeletonization-ant body"way.Again,multi-attribute fusion is utilized to enrich multi-scale fault information.Finally,with high-precision fault predic-tion results and intelligent technology,the efficiency of fault interpretation is improved.The high-precision arti-ficial intelligence fault prediction process was applied to the actual data of Zone X in the Bohai Bay Basin,and the results showed that the profile normal faults are mainly composed of stepped and Y-shaped combinations.Most of them are SE orientation and form simultaneously with the fault depression.The dominant orientation of the fault on the plane is NE,and forms a comb-like combination with secondary faults in the near SN direc-tion,indicating that the area may have undergone sinistral strike slip while deforming extensionally.
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