平衡观点与地震观点的解释效果分析与评价

Effect analysis and evaluation of interpretation viewpoints:A comparison between balanced view and seismic view

目前,人们的地震资料解释观点可分两种,即平衡观点与地震观点,前者是利用平衡地质剖面原理,后者是根据地震勘探原理。因依据、目的和方法不同,两种观点的解释结果自然会出现分歧。平衡地质剖面原理是假设岩层变形前后长度、面积和体积不变原则,用“现在已知时空”推测“过去未知时空”,因假设条件与实际情况有误差,且不同平衡方法也有不同的结果,故平衡是相对的。通过对比分析两种观点所解释的地震剖面可以看出,地震资料解释工作自身有一套完整的理论和方法,具有平衡剖面解释所不可替代的作用,应从油田勘探与开发的实际出发,采取实用的地震解释观点。

At present, there are mainly two different seismic data interpretation viewpoints, namely balanced viewpoint and seismic viewpoint, the former utilizes balanced cross section theory and the latter is based upon seismic prospecting theory. Due to different principles and methods are adopted, there certainly exists difference between these two interpretation results. Balanced cross section theory hypothesizes that the length, area, and volume is unchanged before and after rock deformation. It infers the past space-lime with the present space-time. Due to the deviation between the assumed conditions and the real situations, and even different balancing methods can yield different results, therefore the balance is relative. A comparison between the interpreted seismic sections resulted from different viewpoints shows that seismic data interpretation itself has a set of theories and methods, and is irreplaceable by balanced cross section. In order to meet the need of exploration and development, the author suggests that practical seismic interpretation viewpoint should be adopted.