静校正误差和噪声对瞬时属性影响的定量分析

The quantitative analysis of static error and noise effect on instantaneous attribute.

中国石油大学(北京)物探重点实验室, 北京102249

CNPC Key Lab in Geophysics,China Petroleum of University,Beijing 102249,China

由属性计算以及地震资料本身等因素引起的误差,会影响地震属性预测的效果,降低预测的可信度。在属性提取过程中,影响地震资料品质的静校正误差和噪声是应该注意的问题。为此,设计了随机给定静校正误差和噪声的理论模型。对目的层瞬时属性进行了提取,并定量分析了利用瞬时属性进行储层预测时静校正误差和随机噪声对预测精度的影响。结果表明,三瞬属性的相对误差随静校正误差和随机噪声的增加而增大,静校正误差对三瞬属性的影响要大于随机噪声的影响。

The calculation error affects the prediction result and reduces the prediction reliability in seismic data,which comes from the calculate method of the seismic attribute. The static correction error and seismic noise he are impor- tant affect factors on seismic data.It must be taken into ac- count during seismic attribute extraction.We design a the- oretic model with some discrepancy and noise in random. The instantaneous attributes of target zone are extracted; the quantitative analysis of the static correction error and the random noise effect on the reservoir prediction result by the instantaneous attributes is completed.The result of quantitative analysis indicates that the relative error of the instantaneous seismic attributes is getting bigger with the increase of the static correction error and noise,and static correction error has more effects on the instantaneous at- tributes than those of noise in random.