辫状河三角洲砂体内部构型表征及剩余油分布规律研究

doi:10.3969/j.issn.1672-9803.2019.02.024

摘要/Abstract

摘要：

为了进一步剖析辫状河三角洲前缘储集层内部构型,深入挖掘该类储集层内剩余油,以北大港地区唐家河油田东三段辫状河三角洲沉积为例,通过储集层内部构型解剖,开展唐家河油田东三段辫状河三角洲沉积构型界面级次划分,并对单一分流河道或河口坝及其内部增生体进行构型分析,建立了三维构型模型,精细刻画河道砂体及内部夹层展布规律,进而分析构型控制下的各单砂体剩余油分布规律。研究成果用于唐家河油田东三段高水淹和低动用区块的综合调整治理,取得了较好效果,对同类储集层的构型研究和油藏开发调整具有借鉴意义。

关键词: 辫状河三角洲, 构型表征, 构型建模, 唐家河油田, 剩余油, 分布规律

Abstract:

In order to further analyze the internal architecture of braided river delta front reservoir and to tap remaining oil in the reservoir,the braided river delta deposition in Dong Ⅲ formation of Tangjiahe oilfield in Beidagang area was taken as an example. Through the anatomy of the internal architecture of the reservoir,the interface grade division of the braided river delta sedimentary architecture in Dong Ⅲ formation of Tangjiahe area was carried out. The architecture analysis of single distributary channel or mouth bar and its internal accretion sand bodies was carried out. A three-dimensional architecture model was established,and the distribution law of the channel sand body and internal interlayer was finely characterized to analyze the distribution law of remaining oil of each single sand body under the architecture control. The research results have been used in the comprehensive adjustment and management of blocks with the high water flooding and low degree of development in Dong Ⅲ formation,and achieved good results,which can be used for reference to the architecture study of similar reservoirs and the development and adjustment of oil reservoirs.

Key words: braided river delta, architecture characterization, architecture modeling, remaining oil

中图分类号:

TE132.1

雷传玲, 李泉凤, 王子毓, 李长洪, 白永强, 魏艳楠, 孙伟勇, 王新. 辫状河三角洲砂体内部构型表征及剩余油分布规律研究[J]. 录井工程, 2019, 30(2): 122-127.

Chuanling Lei, Quanfeng Li, Ziyu Wang, Changhong Li, Yongqiang Bai, Yannan Wei, Weiyong Sun, Xin Wang. Characterization of internal architecture of braided river delta sand bodies and distribution law of remaining oil[J]. Mud Logging Engineering, 2019, 30(2): 122-127.

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参考文献 8

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本文构型级别	时间跨度规模/a	构型单元	储集层构型要素	Miall界面分级	经典层序地层分级
6级	10³~10⁴	三角洲沉积体	河道砂层组顶、底界面	6	层组
7级	10³~10⁴	同期河道和河口坝复合体	河道砂体顶、底界面	5	层
8级	10²~10³	单一河道或河口坝	河道砂体侧积体顶面	4	层
9级	10⁰~10¹	内部增生体	洪水期不同阶段沉积界面	3	层
10级	10^-2~10^-1	层系组	交错层系组界面	2	纹层组
11级	10^-5~10^-3	层系	交错层系界面	1	纹层组
12级	10^-6	纹层	纹层	0	纹层

小层	单层	8级单元个数	宽度/m	平均宽度/m	厚度/m	平均厚度/m	平均宽厚比
	4-1	9	325~1 000	626.5	2.9~11.4	5.469	114.55
4	4-2	7	500~780	561.7	2.7~11.1	5.457	102.93
	4-3	7	400~850	540.1	2.6~9.9	4.522	119.57
	5-1	5	380~1 180	628.0	2.5~11.2	5.571	112.73
5	5-2	7	360~780	536.7	2.6~12.6	5.967	89.94
	5-3	6	500~770	606.0	3.1~16.5	6.761	89.63