一种减少地震属性不确定性的方法

An approach to reduce the uncertainty of seismic attributes

中国石化石油勘探开发研究院南京石油物探研究所, 江苏南京210014

Institute of Geophysical Prospecting, SINOPEC Research Institute of Petroleum Exploration and Development, Nanjing 210014, China

提出了一种根据地震波特征点(极值点、半极值点、拐点、最大相干点等)对地震属性计算进行约束的新的属性计算方法———波形约束属性计算法。在分析了目前地震属性研究所存在的主要问题的基础上,根据地震属性计算的特征,提出了运用地震波特征点对属性计算进行约束,以压制由穿层或穿时等因素引起的干扰。介绍了方法原理,并给出了沿层与等时属性例子。波形约束属性计算法简单易行,实际例子说明对于沿层或等时属性的计算有明显效果。

An approach, called waveform-constrained seismic attribute extraction, is presented, which use the feature points of seismic waveform such as extreme points, half extreme points, inflexion points,maximum correlation coefficient points, etc as constraints during the calculation of seismic attributes. On the basis of an analysis of key problems existing in the attribute extractionmethods available, the author proposes that the feature points of seismic waveform be used to reduce the uncertainty of seismic attributes caused by horizon crossing. The principle of the waveform-constrained seismic attribute extraction and some real data examples are presented. Themethod is simple and flexible. Real data examples show that it is effective in reducing the uncertainty of seismic attributes.