摘要
随着地震技术的不断发展,从地震数据中提取的地震属性越来越丰富,通过对地震属性提取、优选和联合解释,在一定程度上减小了地震资料解释的多解性。但由于地震数据本身有限并存在误差,地震属性应用中依然广泛地存在不确定性和非唯一性,认识这些不确定性是地震属性在复杂油气藏勘探与开发中应用的重要前提条件。着重分析了①地质模型的多样性、复杂性、非均质性和几何尺度的限制;②观测数据分辨率的限制、噪声和干扰的影响和观测数据的误差;③预测方法中样本个数限制、方法的适应性和物性参数的不确定性;④主观认识等对地震属性应用的影响,并结合实际资料指出了引起地震属性应用不确定性的基本原因、主要因素及其可能产生的现象,进一步明确了地震属性应用前提、应用条件和应用范围。
With the unceasing development of seismic technology, the extracted seismic attributes from seismic data are more and more rich. By seismic attribute extraction, optimization and volume interpretation, multiple solutions of the seismic data are reduced on a certain degree. Because of the limitation and error in seismic data, applied seismic attributes still broadly exist uncertainties and multiple solutions. Therefore, the cognition to uncertainties is an important prior condition in seismic attributes application on complicated reservoir prospect and development. Based on the theory of seismic prospecting, several aspects are analyzed: the variety, complexity of the geology model and the restriction of dimension; the influence caused by noise and interference, the restriction of resolution and the error of data; the limitation of samples, the method's adaptability and uncertainties; the impact on seismic attributes caused by subjective cognition. The basic reason and possible effect of uncertainties in attributes application are discussed with real data, the applying premise, condition and scale are further determined.
出处
《石油物探》
EI
CSCD
2006年第4期373-379,408,共8页
Geophysical Prospecting For Petroleum
关键词
地震属性
反问题
不确定性
干扰与误差
主观认识
seismic attributes
inversion
indetermination
interference and error
subjective cognition
