现代曲流河沉积原型建模及构型级次特征探讨——以海拉尔河、潮白河为例

第3〇卷第1期中国海上油气Vol. 30 No. 1 2018 年 2 月 C H I N A O F F S H O R E O I L A N D G A S Feb. 2018

文章编号：1673-1506(2018)01-008-09D O I：10. 11935/j. issn. 1673-1506. 2018. 01. 014

现代曲流河沉积原型建模及构型级次特征探讨$

—以海拉尔河、潮白河为例

肖大坤1胡光义1范廷恩1陈飞1董建华1高玉飞1梁旭1 (海洋石油髙效开发国家重点实验室北京1028;2.中海油研究总院有限责任公司北京1028)

肖大坤，胡光义，范廷恩，等.现代曲流河沉积原型建模及构型级次特征探讨一-以海拉尔河、潮白河为例[J].中国海上油气，2018,3(1):118-126. X I A O Dakun»IIU Guangyi»Fan Tingen»et a l.Prototype model of modern fluvial deposits and discussion on architectural units：a case study of Ilailar River and Chaobai River[J]. China Offshore Oil and Gas^2018,30(1) ：118-126.

摘要海上油田河流相储层非均质性强，构型表征是油藏精细描述的核心。基于前人研究，采用“将今论古”思路，针对海拉尔河、潮白河现代曲流河开展地质雷达探测，通过原型建模探讨了河流相储层构型级次特征，取得了以下认识：⑴由于沉积动力和主控因素的转变，河流相储层结构的建造过程以6级界面为过渡点，整体 上，自低级次到高级次体现出由横向转为纵向的沉积趋势，6、7级构型界面是体系中的关键构型界面；（2 )受古 河谷地貌影响，河流沉积体内部表现出纵向多期叠置特征，是多期河谷阶地的体现，不同期次之间可发育相对 连续稳定的层序界面；⑴单点坝多以残存体保存，由多个具有成因联系的残存单点坝组成的复合点坝体，横向 -般以废弃河道为界，具有形成独立沉积体的条件，是曲流河砂体构型解剖中的重要构型单元。

关键词曲流河；探地雷达；海拉尔河；白河；原型模型；构型级次；合点坝

中图分类号：TE1.3文献标识码：A

Prototype model of modern fluvial deposits and discussion on architectural units：

a case study of H ailar River and Chaobai River

XIAODakun1，2H U G u a g，2FanTingen1，2CHENFei1，2DONGJianhua1，2GAOYufei1，2LIANGXu1，2

⑴S ta te K ey L ab o ra to ry o f O ffs h o re OH E x p lo ita tio n；B e i j n g100028, Ch

2. C N O O C R esearch In stitu te C o.，L td. > B e ijin g 100028, C h in a)

Abstract：Considering the great heterogeneity in fluvial reservoir of offshore oilfield?reservoir architecture charac­terization is the core for reservoir fine description.Based on previous study and under the research concept of his­torical comparison,this paper conducted GPR detection on modern sediments of meandering rivers,namely Haila.r River and Chaobai River.This paper,through prototype model reconstruction,reviewed and explored fluvial res­ervoir architectural units features,and concluded the following understandings：Firstly,due to the transformation of deposition dynamic mechanism and dominating factors,fluvial reservoir formation takes the 6th order interface as breaking point.As a whole,from lower order toward higher order,the sedimentation process of fluvial reservoir architecture tends to transfer from lateral to vertical,and the6th and7th orders are key interfaces.Secondly,under the influence of ancient valley landform,fluvial deposits present the characteristics of multi-stacked complex longitudi­nally,which is an indication of multi-stage valley terraces.Relati-vely continuous and stable sequence interfaces may be developed among different stages.Thirdly,individual point bars were mostly reserved in the form of remnant bodies. Generally,point bar complex,which is composed of several genetically related individual point bar remnants and takes abandoned channels as lateral boundary,may have favorable conditions to form isolated sedimentary units.Therefore, point bar complex is the most important unit for meandering ri-ver sand body architecture characterization.

Key words：meandering rivers；GPR；Hailar River；Chaobai River；prototype model；architecture units；

point bar complex

$十二五”国家科技重大专项“海上开发地震关键技术及应用研究（编号：2011X502401)”部分研究成果。

第-作者筒介：肖大坤，男，工程师，主要从事沉积学、开发地质学、储层地质及油藏描述方面研究。地址：北京市朝阳区太阳宫南街6号 院（由5编：：〇〇28)。E-mail；xiaodk3@cnooc. com. cn。