基准面原理在陆相断陷湖盆古地形恢复中的应用——以渤南油田六区沙三段为例  

The Application of Datum Theory to Paleotopography Recovery of Fault Depressed Lacustrine Basin——Taking 6th Area ES3 of South Bohai Oilfield for an Example

作　　者：刘超[1] 谢传礼[1] 郭辉[1] 王成龙[1] 李晓风[1] 

机构地区：[1]中国石油大学<北京>石油工程教育部重点实验室,北京102249

出　　处：《西部探矿工程》2013年第12期22-26,30,共6页West-China Exploration Engineering

基　　金：项目名称:渤南油田六区精细油藏描述

摘　　要：相对超短期或短期基准面旋回变化,中期或长期基准面可认为相对稳定,可将其看作是沉积的趋势面,即为沉积体系顶界面。渤南油田沙三段发育于断陷加剧期,层序格架上位于断陷湖盆低位体系域,沉积物厚度差最接近古地形高差。利用基准面原理,以基准面为沉积顶界,古水深为修正值,结合高分辨率层序地层划分对比,合理地计算出古地形高差,恢复沙三段低位体系域沉积体原始形态。Compared with short or super-short term datum cycle, middle or long term datum is considered relatively stable, which is taken as being a sedimentary trend surface, namely top interface of sedimentary system. South Bohai oilfield ES3 sediments deposited during an aggravating depressed period and located in low systems tract of sequence frame, sediments thickness difference was most close to the paleotopography elevation difference at the end of tract. Within low systems tract of faulted lacustrine basin, the pale- otopography elevation difference can be reasonably measured and original sediment formations can be recovered by adopting the da- tum as sedimentary top bound and paleo-water depth as correction value, linking the high-resolution sequence stratigraphy division and correlation.

关 键 词：基准面原理 古地形高差 渤南沙三段 低位体系域 

分 类 号：P539.2[天文地球—古生物学与地层学]