基于曲率属性的复杂断层精细解释技术及其应用

海外某深水A油田开展复杂断层精细解释研究中，相干类地震属性等传统刻画断层的技术失效。针对研究区断层断距较小但断层两盘地层倾角变化较大的特点，利用沿层曲率属性刻画这种特征。介绍了曲率属性的概念、分类、地质意义和计算方法。通过引入层位优化方法，使用合适参数的网格化方法代替传统的层位插值方法，该技术可以更加清晰地刻画复杂断裂系统，有效指导断层组合解释工作。研究区100 km2范围内解释出的200多条断层，揭示了研究区的复杂断裂特征。最新评价井的钻探证实了解释成果的可靠性。

Applicationof Curvature-Based FineInterpretation Technique in Complex Fault Area

In the fne interpretation of complex faults in the deep-water oilfeld A, the traditional techniques, such as coherence attribute etc., failed to depict the complex faults. Based on the characteristics of the faults in the study area with small fault throwbut signifcant change in the dip angle on the both wallsthe fault, the author adopted the seismic curvature attributes along the horizons to depict the fault distribution. This paper introduces the defnition, classifcation, geological meaning and calculation method of curvature attribute. This technique can more clearly depict the complex fault system through the optimization of horizon introduced and the change of interpolation in which the traditional horizon interpolation is replaced by thesuitable gridding method, thus it can be used to guide the combination interpretationof faults. More than 200 faults interpreted in the study area, 100 km2 in the scope, demonstrate the complexity of faults. The reliability of this interpretation has been confrmed by the appraisal well drilled recently.