提高盘2-26断块断层解释精度研究

Research on improving the accuracy of fault interpretation of P2-26 block

断层对复杂断块油气藏的剩余油分布规律研究与挖潜影响重大。由于断裂系统复杂、地震资料分辨率低,断层解释的精度与准确性难以把握,直接影响着后期开发方案的制定。文中首先利用精细地层对比确定低序级断层井上断点位置,其次采用断层加强技术提高地震资料断层分辨率,并提取加强蚂蚁体识别低序级断层,在此基础上再进行井震结合三维精细构造解释,精细刻画断层。通过多种方法综合应用,盘2-26断块的大断层的平面位置误差减小了50米,地震识别断层最小落差达到9米,提高了断层的解释精度,且在新解释范围内完钻的3口井取得了显著的开发效果。

Fault affects the remaining oil of complex fault block.Because of the complex fault system and low resolution of seismic data,the accuracy of fault interpretation is difficult to determine,which affects the late development plan,In this paper,firstly,the location of minor faults in the logging curve is determined by the fine stratigraphic correlation;Secondly,the strengthening fault margin processing technique is used to enhance the visualization of the faults in seismic data,and using enhanced ant-tracking to track small fault,Then we took 3 D fine structure interpretation by well-seismic combination.Through the application of a variety of technical methods,Offset error of position of the large fault is reduced by 50 meters,Minimum detection capability of the seismic identification fault reached to 9 meters,and the interpretation accuracy of the fault is improved and development effect is improved for 3 wells.