利用断层位移模式确定断层发育史的一种方法  

A METHOD FOR DETERMINING THE HISTORY OF FAULTS USING THE MODEL OF FAULT DISPLACEMENTS

作　　者：单业华[1] 李志安[2] 林舸[2] 

机构地区：[1]青岛海洋大学海洋地质系,山东青岛266003 [2]中国科学院长沙大地构造研究所,湖南长沙410013

出　　处：《石油实验地质》2003年第1期93-96,共4页Petroleum Geology & Experiment

基　　金：中国科学院资源环境领域知识创新工程重要方向项目(KZCX2-113);山东省自然科学基金(Y98E08078).

摘　　要：断层位移是断层多次滑动的累积产物,包含着断层成核、扩展和连接的信息。该文提出利用断层位移模式从观测的断层位移数据中分析断层发育史。以大港油田滩海区张东断层为例,计算结果表明,各沉积期的断层位移量自上而下出现小—大—小—次大的变化趋势,在中新统馆陶组沉积期达到最小,代表着构造相对宁静的转折期;新第三纪的断层扩展参数接近1,明显要比老第三纪的小,表明从所处盆地老第三纪强烈的断陷阶段到新第三纪以来超大范围的坳陷阶段,断层活动强度明显减弱;渐新统东营组沉积期是造成张东断层现今累积位移量侧向变化的主要时期,断层位移量达到最大,而同期的位移量侧向变化也最大。There are extensive information on the nuclei, propagation and linkage of faults recorded by the displacements of faults. By utilizing the model of fault displacements, a method to study the history of faults based on observed data of fault displacement was proposed. Taking the Zhangdong normal fault in the inshore of the Dagang Oil Field as an example, the results showed that the restored fault displacement in different sedimentary stages tended to increase, decrease and then increase less with time. It reached the minimum of displacement during sedimentation of the Oligocene Dongying formation, and representd the relatively quiet epoch in regional extension. The parameter of fault propagation is larger in the Eocene than in the Neogene, the latter ca.1.0. This indicated the tendency of decrease in the fault activity with time, corresponding with the evolution of the basin which experienced intense riftsubsidence in the Eocene to depression in the Neogene. It was during the deposition of the Oligocene Dognying formation that the fault activity had generated both the maximum displacement and the maximum lateral variation in displacement.

关 键 词：断层位移模式 断层发育史 方法 张东断层 大港油田 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]