反射波振幅异常的提取及平面显示

EXTRACTION OF REFLECTION AMPLITUDE ANOMALIES

南海西部石油公司研究院

本文叙述了地震波振幅异常的提取及平面显示方法。方法要点有三:其一,对地震记录进行精细、保真处理,尽最大可能消除非地质因素的影响;其二,采用振幅扫描方法,并解释目的层位,拾取其振幅信息;其三,用加权最小二乘法对数据进行网格化处理并做激光彩色显示。这就为综合分析油气田提供了一种重要参考图件。

This paper deals with the extraction of reflection amplitued anomaly and its mapping on the plain figure. There are three main points that special attentions should be paid to:1. The hi-fi processing should be made carefully in every possible way to eliminate the influence caused by non-geological factors)2. The extraction of the amplitude information by amplitude scanning and the correlation of the target strata;3. The handling of the data by weighted least square technique in accordance with the grid chart and the laser colour display.In the end of this paper, an example from marine survey was presented. All the charts attached to this paper were of great importance for examining the oil/gas field mentioned above.