石油与天然气地质 ›› 2000, Vol. 21 ›› Issue (1): 88-91.doi: 10.11743/ogg20000121

• 技术经纬 • 上一篇    下一篇

原型盆地剥蚀量计算的新方法──波动分析法

张一伟, 李京昌, 金之钧, 刘国臣   

  1. 石油大学,北京102200
  • 收稿日期:1999-06-16 出版日期:2000-03-25 发布日期:2012-01-16

A NEW CALCULATING METHOD OF DENUDED AMOUNT FOR PROTOTYPE BASIN—WAVE ANALYSIS

Zhang Yiwei, Li Jingchang, Jing Zhijun, Liu Guochen   

  1. Petroleum University, Beijing
  • Received:1999-06-16 Online:2000-03-25 Published:2012-01-16

PDF (PC)

978

摘要：

原型盆地剥蚀量计算的传统方法较多,但因方法的前提条件和数据的取得均受到了较多限制,所以难以真实反映地层缺失的原因。波动分析则是根据由已知到未知的原理,由残余地层地质时间剖面沉积速度直方图建立波动方程,寻找不同时期的地层沉积周期波,判断沉积缺失的原因及缺失量。使用波动分析法,首先要尽可能均匀选择研究区,在原始资料统计分析的基础上,将岩性厚度剖面转化为岩性时间剖面,最后绘制沉积速率曲线,恢复地层剥蚀量。三水盆地华涌组应用此方法分析的结果为渐新世晚期及新第三纪有过沉积,只是沉积后又被剥蚀殆尽,致使现今无地层记录。现今所见的三水盆地边界,实际上是在 39Ma以后不同时期形成的。

关键词: 原型盆地, 剥蚀量, 波动分析, 三水盆地

Abstract:

There are plenty of traditional methods to calculate denuded amount of Prototype Basin,but the results of these methods can hardly reflect the real reason of lacuna.The wave analysis method is based on the principle from knowing to unknowing to establish the wave equation by sedimentary rate histogram of residual stratum in geological time profile,and then find out the periodic wave of stratum deposited in different stages,judge the reason and the amount of sedimentary lacuna.To use this new method,one have to select the study areas as evenly as possible first,then change the lithologic-thickness sections into lithologic-time sections according to original data analysis,and finally plot sedimentary rate curves,restore stratigraphic denudation amount.The method was used to analyse the Huayong Formation in Sanshui Basin.The results suggest that there had been sediments of Late Oligocene and Neogene,but all were denuded.The present boundary of the Sanshui Basin was acturally formed after 39 Ma

Key words: prototype basin, denuded amount, wave analysis

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