柴达木盆地马海盐湖储卤层渗透特征及卤水富集机制

doi:10.13249/j.cnki.sgs.2022.11.018

地理科学 ›› 2022, Vol. 42 ›› Issue (11): 2039-2046.doi: 10.13249/j.cnki.sgs.2022.11.018

• • 上一篇

柴达木盆地马海盐湖储卤层渗透特征及卤水富集机制

胡舒娅¹(), 任婕¹, 李吉庆², 赵全升¹()

1.青岛大学环境科学与工程学院，山东青岛 266100
2.青岛市生态环境局城阳分局生态环境监控中心，山东青岛 266109

收稿日期:2022-03-18 修回日期:2022-06-11 发布日期:2022-11-20 出版日期:2022-11-30
通讯作者: 赵全升 E-mail:90shuya@sina.com;qszhaoqdu@163.com
作者简介:胡舒娅（1990−），女，山东济宁人，讲师，博士，主要从事地下水资源管理与评价研究。E-mail: 90shuya@sina.com

Permeability and Brine Enrichment Mechanism of Brine Reservoir in the Mahai Salt Lake, Qaidam Basin

Hu Shuya¹(), Ren Jie¹, Li Jiqing², Zhao Quansheng¹()

1. School of Environmental Science and Engineering, Qingdao University, Qingdao 266100, Shandong, China
2. Ecological Environment Monitoring Center of Chengyang Sub-branch of Qingdao Ecological Environment Bureau, Qingdao 266109, Shandong, China

Received:2022-03-18 Revised:2022-06-11 Online:2022-11-20 Published:2022-11-30
Contact: Zhao Quansheng E-mail:90shuya@sina.com;qszhaoqdu@163.com

摘要/Abstract

摘要：

通过野外抽水试验方法，确定了柴达木盆地马海盐湖储卤层渗透系数，并结合地下卤水赋存特征与沉积环境对其渗透性能进行分析。结果表明：本地区石盐层大多不纯，石盐晶体内包裹有泥、砂，且晶体间也有泥、砂充填。在石盐沉积期间，由于受到洪水与间歇性河流影响，导致地质环境演化过程中沉积形成的储卤层渗透性能在各处相差较大，区域地下卤水的连通性相对较弱。根据试验开采区27口开采井钻孔资料和地下卤水监测数据，进行了储卤层差异性分类，将钻孔所揭露储卤层划分为3种类型，不同类型储卤层卤水富集性能具有较大差异，表现为渗透系数和单井涌水量在平面分布上的较大数值差距。通过对钻孔岩心岩性、孔隙特征及补给条件等方面进行分析，得出卤水富集性能强的基本条件：储卤层具备天然良好的颗粒骨架和稳定的卤水补给来源与通道。依据储卤层渗透性能和卤水富集规律，将马海盐湖试验开采区划分出不同地下卤水富集区段。

关键词: 渗透系数, 抽水试验, 卤水富集, 储卤层, 马海盐湖

Abstract:

The permeability coefficient of brine reservoir in the Mahai Salt Lake of Qaidam Basin was determined by field pumping test, and its permeability was analyzed by the occurrence characteristics and sedimentary environment of underground brine. The results showed that most of the rock salt layers in this area are impure, the rock salt crystals are wrapped with mud and sand, and the crystals are also filled with mud and sand. During the period of rock salt deposition, the permeability of the brine reservoirs formed during the evolution of the geological environment varied considerably due to the influence of floods and intermittent rivers, and the connectivity of the regional subsurface brine was weak. According to the drilling data of 27 mining wells and the monitoring data of underground brine in the experimental mining area, the brine reservoir was classified differentially. The brine reservoirs exposed by the drilling were divided into three types. The brine enrichment performance of different types of brine reservoirs is quite different. Through the analysis of the lithology, pore characteristics and supply conditions of borehole cores, the basic conditions for strong brine enrichment performance were obtained: The brine reservoir has a natural good particle skeleton and a stable brine supply source and channel. According to the permeability of brine reservoir and the law of brine enrichment, the experimental mining area of the Mahai Salt Lake was divided into different underground brine enrichment sections.

Key words: permeability coefficient, pumping test, brine enrichment, brine reservoir, the Mahai Salt Lake

中图分类号:

P641.3

胡舒娅, 任婕, 李吉庆, 赵全升. 柴达木盆地马海盐湖储卤层渗透特征及卤水富集机制[J]. 地理科学, 2022, 42(11): 2039-2046.

Hu Shuya, Ren Jie, Li Jiqing, Zhao Quansheng. Permeability and Brine Enrichment Mechanism of Brine Reservoir in the Mahai Salt Lake, Qaidam Basin[J]. SCIENTIA GEOGRAPHICA SINICA, 2022, 42(11): 2039-2046.

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孔号	孔深/m	涌水量/(m³/d)	降深/m	渗透系数/(m/d)
K1	115	6254	2.05	46.09
K2	130	87	33.00	0.50
K3	100	97	24.00	0.40
K4	120	6000	0.50	38.00
K5	120	1400	0.10	49.00
K6	100	5000	0.30	48.00
K7	100	7000	0.65	43.00
K8	110	202	5.00	0.25
K9	110	186	5.00	0.23
K10	110	378	5.00	0.48
K12	100	2862	0.32	113.97
K13	100	4368	0.21	132.14
K14	100	2334	0.10	53.53
K15	110	5520	18.40	42.00
K16	110	5520	13.45	34.00
K17	110	3989	3.61	24.32
K18	100	5520	5.87	26.00
K21	100	3438	1.07	95.10
K22	100	3756	5.73	80.03
K24	100	264	15.00	12.00
K25	100	4150	0.31	94.69
K26	100	3789	0.41	55.70
K27	100	1350	5.40	21.00
K28	100	1235	5.90	18.00
T1	151	2236	6.63	20.98
T2	150	181	28.27	0.31
T3	151	181	31.63	0.10

孔号	孔深/m	主要岩性	厚度/m	平均孔隙度/%	平均渗透系数/（m/d）	出水量/（m³/d）	渗透性能
K1	115	含淤泥粉砂石盐、含粉砂石盐	72.10	21.20	46.09	6254	强
T1	151	含粘土石盐、含粉砂石盐	40.04	14.67	20.98	2236	中等
T3	151	石盐、含粘土石盐	30.80	11.28	0.10	181	弱

柴达木盆地马海盐湖储卤层渗透特征及卤水富集机制

Permeability and Brine Enrichment Mechanism of Brine Reservoir in the Mahai Salt Lake, Qaidam Basin

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