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Method for comprehensively monitoring invasion of seawater into sandstone aquifer

A seawater intrusion and comprehensive monitoring technology, applied in measuring devices, geophysical measurement, radio wave measurement systems, etc., can solve the problems of high cost of simple water chemistry method and inaccurate positioning of resistivity method, etc., to solve inaccurate positioning, The effect of accurate positioning

Active Publication Date: 2020-05-15
JIANGSU OCEAN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to propose a method for comprehensive monitoring of seawater intrusion into sandstone aquifers, to solve the problems of inaccurate positioning by resistivity method and high cost of simple hydrochemical method, and to achieve more accurate and reliable seawater intrusion positioning

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  • Method for comprehensively monitoring invasion of seawater into sandstone aquifer
  • Method for comprehensively monitoring invasion of seawater into sandstone aquifer
  • Method for comprehensively monitoring invasion of seawater into sandstone aquifer

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing, the present invention will be further described:

[0040] The invention mixes the fresh water obtained by sampling with seawater, respectively measures the chloride ion concentration and resistivity of the mixed solution, and establishes a relationship curve between the ion concentration and the resistivity of the freshwater-seawater mixed solution. The parameters in Archie's formula are obtained by testing the samples taken from each borehole. Through Archie's formula, the relationship curve between chloride ion concentration and the resistivity of freshwater-seawater mixture is transformed into the relationship curve between chloride ion concentration and seawater intrusion formation true resistivity. Using drilling data and logging data, a set of geoelectric models was established, and two-dimensional forward modeling of resistivity was carried out to obtain the apparent resistivity of the intruded aquifer, and the curv...

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Abstract

The invention discloses a method for comprehensively monitoring invasion of seawater into a sandstone aquifer. A resistivity method (a high-density electrical method or a parallel electrical method),a resistivity logging method, a ground penetrating radar method or a seismic reflection method, a hydrogeochemical method, a sampling test method and the like are integrated to monitor seawater invasion, and the problems that the resistivity method is inaccurate in positioning and a pure hydrochemical method is high in cost are solved. Meanwhile, seawater invasion positioning is more accurate andreliable.

Description

technical field [0001] The invention belongs to the comprehensive technical field of geophysical prospecting and hydrochemistry, and in particular relates to a method for comprehensively monitoring seawater intrusion into a sandstone aquifer. Background technique [0002] At present, seawater intrusion monitoring methods mainly rely on hydrogeochemical methods, that is, drilling wells to take water samples, test the water samples, and determine seawater intrusion areas (non-invasion areas, mild intrusion areas, and severe intrusion areas). The current international seawater intrusion standard is also obtained by using hydrogeochemical methods. However, the data used in this method is point data, and the external environment around the borehole has a great influence on the data. [0003] Many areas in China have tried to use the resistivity method to monitor seawater intrusion. The resistivity method is easy to obtain profile data, can perform real-time monitoring and obtain...

Claims

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Application Information

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IPC IPC(8): G01V11/00G01V3/00G01V3/18G01V3/38G01N27/04G01N27/06
CPCG01N27/048G01N27/06G01V3/00G01V3/18G01V3/38G01V11/00
Inventor 杜良张瑞宗钟凌朱文谨孙圆俊张子牛
Owner JIANGSU OCEAN UNIV
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