断层EDF技术在复杂断块构造研究中的应用

Application of Fault EDF Technology in Complex Fault Block Structure Interpretation

复杂断块构造具有断层复杂,小断层广泛发育,断层识别难度大,储层分布及连通性复杂,地震成像不清、资料品质较差等特征。对于此类问题,常规地震资料无法满足断层解释精度要求。提出了一种新的断层EDF解释性处理技术,将地震资料处理与解释融为一体,以提高资料的信噪比和断层的识别能力。断层EDF解释性处理技术是利用扩散滤波和中值倾角滤波相结合的断层增强滤波方法来提高资料的信噪比,突出断层和地层的接触关系,再在滤波后的地震资料数据体上进行分频处理,选择最佳成像频带,突出识别不同规模的断层。通过在涠洲A油田的应用,取得了良好的效果。

The complex fault block structures are characterized by complexity of fault, development of many minor faults, complex distribution and connectivity of reservoirs. These distinguishing features re- sult in unclear seismic imaging and poor data quality. The conventional seismic fault interpretation cannot meet the accuracy requirements. Thus, this paper presents a new fault EDF interpretive processing tech- nology that integrates seismic data processing and interpretation to improve the signal to noise ratio and resolution data. Fault EDF interpretive processing technology adopts diffusion filter and median dip filter combines fault enhancement filtering at first to improve signal to noise ratio and highlight the relationship between the fault and the contact formation. Then, the data frequency processing is performed after the seismic data are filtered so that the best imaging band is chosen to highlight the recognition of different size faults. The application of this technology in Weizhou A oilfield has achieved good results.