基于数字化水位的琼东北地区构造应力场时序特征分析

解晓静; 张艺潇; 张帆; 李盛; 郑在壮

doi:10.19987/j.dzkxjz.2021-046

基于数字化水位的琼东北地区构造应力场时序特征分析

doi: 10.19987/j.dzkxjz.2021-046

1.
海南省地震局，海南海口 570203
2.
中国地震局地球物理研究所，北京 100081

基金项目: 2021年度中国地震局监测、预报、科研三结合课题（3JH-2021038）资助。

详细信息

通讯作者:
解晓静（1982-），女，工程师，主要从事地下流体学科方面的研究。E-mail：107969711@qq.com

中图分类号: P315.3
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- 文章访问数: 265
- HTML全文浏览量: 97
- PDF下载量: 33
出版历程
- 收稿日期: 2021-07-26
- 修回日期: 2021-11-08
- 网络出版日期: 2022-01-21

Temporal characteristics of the tectonic stress field of northeast Hainan based on digital water level

1.
Hainan Earthquake Agency, Hainan Haikou 570203, China
2.
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

摘要

摘要: 选取琼东北地区2008年以来连续稳定、潮汐形态较明显的海口ZK26井、琼海加积井、向荣村井、火山流体井、文昌潭牛井5口井数字化水位及相应的气压资料。利用气压系数和O₁、M₂波潮汐因子等滑动拟合，得到不排水状态下，各井含水层的孔隙度、固体骨架的体积压缩系数和水的体积压缩系数。并在水平层状含水层（一维）模式下，利用部分含水层介质参数（孔隙度、水和固体骨架的体积压缩系数）、井水位变化量与含水层垂直向应力变化量的关系式，定量分析了琼东北地区构造应力场的动态变化过程。再结合区域重力场累积动态变化及基于GPS基线的区域构造活动综合分析，结果表明，琼东北地区近几年以持续的应力减弱活动为主，今后需跟踪其转折变化情况的发生，并加强多学科、多手段的密切跟踪。
- 数字化水位 /
- 构造应力场 /
- 时序特征 /
- 琼东北地区
Abstract: We selected digital water level and corresponding air pressure data of 5 wells in the northeast Hainan, which are continuous, stable and with obvious solid tide since 2008. These wells are Haikou ZK26 well, Qionghai Jiaji well, Xiangrong village well, Volcanic fluid well, and Wenchang Tanniu well. We obtained porosity and volume compression coefficient between solid skeleton and water under undrained condition by the barometric efficiency and O₁、M₂ tidal factor smooth fitting. In horizontally layered one-dimensional aquifer mode, using partial aquifer parameters (porosity, water and solid skeleton volume compression coefficient) and relationship between water level variation and aquifer vertical stress, we quantitatively analyzed the dynamic change process of tectonic stress field of the northeast Hainan. Combined with the cumulative dynamic change of regional gravity field and the comprehensive analysis of regional tectonic activities based on GPS baseline, the results show that the northeast of Hainan is dominated by continuous stress weakening activities in recent years. In the future, it is necessary to track the occurrence of its turning changes and strengthen the close tracking of multi-disciplinary and multi means.
- digital water level /
- tectonic stress field /
- temporal characteristics /
- northeast Hainan

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图 1 研究的5口观测井空间位置分布图

Figure 1. Spatial distribution of 5 observation wells studied

下载: 全尺寸图片幻灯片

图 2 琼东北地区 5 口井水位潮汐分波振幅特征图

Figure 2. Characteristics of tidal wave amplitude of water level of 5 wells in northeast Hainan

下载: 全尺寸图片幻灯片

图 3 琼东北地区 5 口井水位潮汐因子月值曲线图

Figure 3. Monthly value curve of water level tidal factor of 5 wells in northeast Hainan

下载: 全尺寸图片幻灯片

图 4 琼东北地区5口井水位气压系数月值曲线图

Figure 4. Monthly value curve of water level pressure coefficient of 5 wells in northeast Hainan

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图 5 琼东北地区5口井水位变化量月值曲线图

Figure 5. Monthly value curve of water level change of 5 wells in northeast Hainan

下载: 全尺寸图片幻灯片

图 6 海口ZK26井、琼海加积井、向荣村井、火山流体井、文昌潭牛井水位变化量与含水层垂直向应力变化量月值曲线

Figure 6. Monthly curve of water level variation and vertical stress variation of aquifer Haikou ZK26 well, Qionghai Jiaji well, Xiangrong village well, Volcanic fluid well and Wenchang Tanniu well

下载: 全尺寸图片幻灯片

图 7 海南岛陆重力场累积变化动态分析图像

Figure 7. Dynamic analysis image of cumulative change of land gravity field in Hainan Island

下载: 全尺寸图片幻灯片

图 8 （a）琼北地区流动GPS观测点分布；（b）马鞍岭参考站与各流动站点基线逐年变化示意图

Figure 8. （a） Distribution of mobile GPS observation points in northern Hainan；（b） Schematic diagram of annual change of baseline of Ma’anling reference station and mobile stations

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表 1 开展研究的琼东北地区5口井的基本情况

Table 1. Basic situation of 5 wells in northeast Hainan

序号	井点名称	东经/°	北纬/°	井深/m	含水层岩性	地下水类型	水位埋深/m
1	海口ZK26井	110.355	20.033	706.30	Q4玄武岩砂砾岩	承压水	13.2
2	向荣村井	110.283	19.983	320.00	细砂岩	裂隙承压水	42.3
3	火山流体井	110.355	19.985	276.10	砂砾岩	裂隙承压水	28.6
4	文昌潭牛井	110.738	19.687	150.76	复矿砾岩	裂隙承压水	1.84
5	琼海加积井	110.462	19.245	525.93	K2砂砾岩	裂隙承压水	2.74

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