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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第43卷

期数:

2021年第05期

页码:

850-967

栏目:

基础地质与矿产地质

出版日期:

2021-09-15

文章信息/Info

Title:

Single Sandbody Architecture of Sublacustrine Fan in a Depression Lacustrine Basin—Insights from Triassic Chang-6 Oil-bearing Interval in Heshui Area of Ordos Basin, China

文章编号:

1672-6561(2021)05-0850-18

作者:

屈雪峰¹; 王武荣²; 3; 谢启超¹; 岳大力²; 3*; 刘 建¹; 吴胜和²; 3; 张雪婷²; 3; 胡嘉靖⁴

(1. 中国石油长庆油田公司勘探开发研究院,陕西 西安 710018; 2. 中国石油大学(北京)地球科学学院,北京 102249; 3. 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249; 4. 中国石油国际勘探开发有限公司,北京 100034)

Author(s):

QU Xue-feng¹;  WANG Wu-rong²; 3;  XIE Qi-chao¹;  YUE Da-li²; 3*;  LIU Jian¹;  WU Sheng-he²; 3;  ZHANG Xue-ting²; 3;  HU Jia-jing⁴

(1. Research Institute of Exploration and Development, Changqing Oilfield Company, PetroChina, Xi'an 710018, Shaanxi, China; 2. College of Geosciences, China University of Petroleum, Beijing 102249, China; 3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China; 4. China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China)

关键词:

湖底扇;  单砂体;  定量规模;  叠置样式;  三维构型模式;  长6油层组;  合水地区;  鄂尔多斯盆地

Keywords:

sublacustrine fan;  single sandbody;  quantitative scale;  superimposition pattern;  three-dimensional architecture model;  Chang-6 oil-bearing interval;  Heshui area;  Ordos Basin

分类号:

P618.13; TE122

DOI:

10.19814/j.jese.2020.10041

文献标志码:

A

摘要:

重力流沉积是目前国际沉积学研究的热点和难点。相比于海底扇储层,湖底扇储层单砂体构型的研究相对薄弱,尤其是定量构型模式研究鲜有报道。综合应用岩芯、测井及生产动态资料,对鄂尔多斯盆地合水地区三叠系长6油层组进行了砂体构型解剖,明确了湖底扇内部单砂体构型特征。结果表明:湖底扇中共识别了6种构型单元类型,即主水道、分支水道、朵叶主体、朵叶侧缘、水道间及朵叶间。基于直井和水平井的单砂体边界识别标志,完成了单砂体边界划分,明确了湖底扇朵叶体由多个单一朵叶体补偿叠置而成,补偿叠置样式受控于短期基准面旋回变化。单一朵叶体在平面上呈舌状,近端略窄,远端略宽,最大宽度与最大厚度之间成明显的线性正相关关系,宽厚比为100～160。基于构型解剖成果,建立了坳陷湖盆湖底扇的三维构型模式。研究成果对油田后期开发方案调整及剩余油分布的挖潜具有重要的指导意义。

Abstract:

The theories involved in gravity flow deposits have become a hot and difficult topic of international sedimentology research. Compared with submarine fan reservoirs, the study on the single sandbody architecture of sublacustrine fan reservoirs is relatively weak, especially the study on quantitative architecture models is still rarely reported. Based on the integrated analysis of the core, well logging and production data, the architectural characteristics of Triassic Chang-6 oil-bearing interval in Heshui area of Ordos Basin were investigated, and the distribution of the single sandbody of sublacustrine fan in depression lacustrine basin was determined. The results show that 6 architecture elements are identified in sublacustrine fan, including main channel, branch channel, lobe, lobe edge, inter-channel and inter-lobe. Based on the single sandbody boundary recognition mark of exploration wells and horizontal wells, the boundary of single sandbody was divided. The lobe complex is composed by multiple individual lobes as the compensational superimposition pattern, which is related to the short-term base-level changing. The single lobe is tongue-shaped on the plane and narrower in the proximal region while wider in the distal region. There is an obvious linear positive correlation between maximum width and maximum thickness, with the aspect ratio ranging from 100 to 160. Finally, according to the analysis results of the architecture in the study area, the three-dimensional architecture model of sublacustrine fan in the depression lacustrine basin is established. The research results have important guiding significance for the adjustment of the oilfield development program and the exploitation of remaining oil.

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备注/Memo

备注/Memo:

收稿日期:2020-10-30; 修回日期:2021-02-04投稿网址:http:∥jese.chd.edu.cn/
基金项目:中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项项目(ZLZX2020-02); 国家科技重大专项项目(2017ZX05013002-004); 中国石油天然气股份有限公司重大科技专项项目(2016E-0505)
作者简介:屈雪峰(1972-),女,山西运城人,教授级高级工程师,E-mail:qxf_cq@petrochina.com.cn。
*通讯作者:岳大力(1974-),男,黑龙江巴彦人,教授,博士研究生导师,理学博士,E-mail:yuedali@cup.edu.cn。

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更新日期/Last Update: 2021-09-30