柴达木盆地扎哈泉地区新近纪物源分析

潘双苹; 胡光明; 李积永; 肖红平; 吴帆; 范琳琳

doi:10.19509/j.cnki.dzkq.2022.0098

柴达木盆地扎哈泉地区新近纪物源分析

doi: 10.19509/j.cnki.dzkq.2022.0098

1.
长江大学地球科学学院，武汉 430100
2.
中国石油青海油田分公司勘探开发研究院，甘肃敦煌 736202
3.
中国石油勘探开发研究院，北京 100083
4.
晋能控股煤业集团寺河矿，山西晋城 048000
5.
中国石油化工股份有限公司江汉油田分公司，湖北潜江 433124

基金项目:

国家自然科学基金项目 41472097

中国石油重大科技专项 2016E01

详细信息

作者简介:
潘双苹(1996—)，女，现正攻读地质工程专业硕士学位，主要从事储层沉积学研究工作。E-mail: 3249785659@qq.com

通讯作者:
胡光明(1977—)，男，教授，主要从事沉积储层与层序方面的教学与科研工作。E-mail: hugm1214@163.com

中图分类号: P534.62
计量
- 文章访问数: 271
- PDF下载量: 30
- 被引次数: 0
出版历程
- 收稿日期: 2021-12-28

Analysis of Neogene provenance in Zhahaquan area, Qaidam Basin

1.
School of Geosciences, Yangtze University, Wuhan 430100, China
2.
Research Institute of Petroleum Exploration & Development of Qinghai Oilfield Company, PetroChina, Dunhuang Gansu 736202, China
3.
PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
4.
Jinneng Holding Coal Industry Group Sihe Mine, Jincheng Shanxi 048000, China
5.
SINOPEC Jianghan Oilfield, Qianjiang Hubei 433124, China

摘要

摘要:
一般认为柴西地区的扎哈泉油田新近纪砂坝储层的物源与古近纪的物源一致，但前人对古近纪的物源有不同的观点，从而造成扎哈泉地区新近纪物源认识不清，影响了该区沉积相与储层构型的研究。运用SPSS软件，对该区新近纪有限的重矿物资料进行聚类分析，进而研究不同类别样本的重矿物分布特征，并与铁木里克物源和祁漫塔格—东柴山物源进行了对比。研究结果表明：扎哈泉地区新近纪的物源来自祁漫塔格—东柴山，不存在两大物源在此交汇混合的情形，且该区内部又可以分为两个次级物源，一个仅仅覆盖扎2井区、扎401井区和扎7井区，另一个覆盖全区，两个次级物源存在交汇混合。该项研究厘清了扎哈泉地区新近纪物源的归属，为该区砂坝构型研究，特别是砂坝的迁移叠置方式研究提供了有力的参考。
- 柴达木盆地 /
- 扎哈泉地区 /
- 新近纪 /
- 物源分析 /
- 重矿物 /
- 聚类分析
Abstract:
It is generally believed that the provenance of the Neogene sandbar reservoir in the Zhahaquan Oilfield in the western Qaidam Basin is consistent with that of the Paleogene. However, existing studies present different opinions on the provenance during the Paleogene, which makes the provenance of the Neogene unclear and affects the study of sedimentary facies and reservoir configuration in the Zhahaquan area. By using SPSS software, clustering analysis was conducted on the limited heavy mineral data from Neogene in this area.Then, the distribution characteristics of heavy minerals from different samples were studied and compared with the Tiemulik provenance and Qimantag-Dongchaishan provenance.It is considered that the Neogene provenance in the Zhahaquan area originated from Qimantag-Dongchaishan, and there is no evidence of intersection and mixing of the two major provenances. The Qimantag-Dongchaishan provenance can be further divided into two secondary provenances, i.e.one covering only the Zha2 well area, Zha401 well area and Zha7 well area, and the other covering the whole area. There is intersection and mixing of the two secondary provenances. This study clarifies the provenance of Neogene deposits in the Zhahaquan area and provides a significant reference for research on sandbar configuration, especially the migration and superposition of sandbars in this area.
- Qaidam Basin /
- Zhahaquan area /
- Neogene /
- provenance analysis /
- heavy mineral /
- cluster analysis

HTML全文

图 1 柴西古近纪物源与沉积相分布

Figure 1. Paleogene provenance and sedimentary facies distribution in the western Qaidam Basin

下载: 全尺寸图片幻灯片

图 2 取样井位(范围见图 1)

Figure 2. Location of sampling well

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图 3 变量R型聚类分析结果

Figure 3. R-type clustering result of variables

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图 4 样本Q型聚类分析结果

Figure 4. Q-type clustering results of samples

下载: 全尺寸图片幻灯片

图 5 不同方向上相对搬运距离与ZTR指数的相关性分析

a.NWW-SE向相对搬运距离与ZTR指数的相关性；b.SW-NE向相对搬运距离与ZTR指数的相关性

Figure 5. Correlation analysis between relative transportation distance and ZTR index in different directions

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图 6 两类有效样本的重矿物特征

Figure 6. Heavy mineral characteristics of two kinds of available samples

下载: 全尺寸图片幻灯片

图 7 扎7-扎401井区新近系上干柴沟组单砂坝叠置关系及复合坝构型特征

Figure 7. Superposition relationship of a single sand dam and the configuration characteristics of the composite dam of the Neogene Upper Ganchaigou Formation in Zha7-Zha401 wells field

下载: 全尺寸图片幻灯片

表 1 删除异常值后的重矿物数据

Table 1. Heavy mineral data after deleting anomalous value

表 2 两类有效样本的重矿物数据与相关参数统计

Table 2. Heavy mineral data and related parameter statistical table of two kinds of available samples

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