ZC地区断裂检测方法及特征研究

Fault detection methods and characteristics in the ZC area

塔里木盆地ZC地区奥陶系断控油气藏资源丰富,储集体发育和油气藏充注聚集受多期次发育的走滑断裂体系控制。受目的层埋深大、资料信噪比低以及走滑断裂同相轴错动小且断点不清晰等因素影响,目前该区断裂的刻画效果并不理想。为进一步提高ZC地区地震资料信噪比和断裂识别精度,开展解释性处理方法和断裂检测技术研究及测试,形成优势频带滤波与构造导向滤波结合的目标增强处理技术流程,筛选总结出适用于深层走滑断裂的多尺度断裂检测方法。在此基础上,应用断裂特征和继承性量化分析技术对断裂的几何学、运动学特征和活动期次进行了精细解剖,明确了断裂的活动特征,对该区断控油气藏勘探开发具有重要意义。

The Ordovician fault-control oil and gas reservoirs in the ZC area of the Tarim Basin are rich in resources.The development of reservoir bodies and accumulation of oil and gas are controlled by a multi-stage strike-slip fault system.Limited by the large,buried depth of the target layer,low signal-to-noise ratio of the seismic data,and small dislocation of the strike slip fault axis,the fault characterization effect in this area is not ideal at present.To improve the accuracy of fault identification in the ZC area,an investigation of interpretive processing methods and fault detection technology was conducted,the target enhancement processing technology process combining dominant frequency band filtering and structure-oriented filtering was formed,and the multi-scale fault detection methods suitable for deep strike-slip faults were screened and summarized.On this basis,the geometry,kinematics,and active phases of the fault were dissected using inheritance quantitative analysis techniques,and the active characteristics were elucidated,which was crucial for exploring and developing fault-controlled oil and gas reservoirs in the area.