基于沉积模拟的河口坝构型分析

摘要

Based on principle of physical simulation of sedimentation and architecture analysis ,flume simulation tests of the mouth bar architecture were conducted on s Es2 8th sand group of Shengtuo oilfield ,based on the architecture and sedimentation background of the researched area .Firstly ,according to the division scheme of the architecture of fluvial facies ,the third-order ,fourth-order and fifth-order sedimentary boundaries were recognized under the experimental condi -tions ,based on which the single mouth bar constrained by the fourth-order boundary was identified .Then the single mouth bar was recognized from plane and vertical profile further ,and its width-to-thickness ratio was analyzed quantita-tively .This study will provide references for the architecture analysis of subsurface mouth bars .%综合应用沉积物理模拟实验原理和储层构型分析方法，以胜坨油田沙二段8砂组为例，结合工区构造沉积背景，开展水槽模拟实验，对实验区河口坝构型进行解剖。首先参照河流相构型界面划分方案划分出水槽模拟实验条件下可识别的3、4、5级沉积界面，在此基础上识别出4级构型界面所限定的单一河口坝砂体构型单元，从剖面和平面上对单一河口坝进行了识别，定量分析了河口坝的宽厚比，研究可以为井下河口坝构型的解剖提供参考。