石油与天然气地质 ›› 1984, Vol. 5 ›› Issue (1): 47-54.doi: 10.11743/ogg19840106

• 论文 • 上一篇    下一篇

古地层厚度计算方法的探讨

陈章明, 万龙贵   

  1. 大庆石油学院
  • 收稿日期:1983-01-12 出版日期:1984-03-25 发布日期:2012-01-16

A CALCULATING METHOD ON THE FOSSIL THICKNESS OF STRATIGRAPHY

Chen Zhangmin, Wan Longgui   

  1. Geological Department, Daqing College of Petroleum
  • Received:1983-01-12 Online:1984-03-25 Published:2012-01-16

摘要:

碎屑岩类和粘土岩类压实固结成岩作用的研究颇早。1930年,L.F.Athy 就整理了美国宾夕法尼亚和俄克拉何马南部二叠系页岩的孔隙度、密度随埋藏深度而变化的关系曲线。五十年代以后,这方面的研究逐渐兴起,其模拟实验也纷纷开展。一般认为,砂岩的最终压实率为20%左右,泥岩的最终压实率为70%左右。

Abstract:

Modelling experiments of clay and clastic sediments of various particle si-zes have been made and some empirical fomulations are obtained.This kind of work has proved that the compactibility varies with the particle size;and the differentia of compactibility depend remarkably on the difference of particle size also,when the same condition of pressure have been undertaken.The stratigraphical thickness is surely getting thinner with the increasing of compaction in the process of sedimentation and lithification.A calculating method is thus suggested for restoring the fossil stratigraphical thickness,with the Saertu structure,Daqing Oilfield,taken as an example,the fossil strati-graphical thickness of three formations of which have been restored on the ba-sis of one of its cross sections.The results have demonstrated that the fossil tectonic pattern restored by means of fossil stratigraphical thickness fits more the reality,and is quite different from that restored by means of recent stra-tigraphical thickness.