A method for testing fluid-rock interaction

Abstract

The invention discloses a method for fluid-rock interaction test, cleaning the reaction container and lining components, conducting the first electron and backscattered scanning electron microscope observation and X-fluorescence spectrum analysis on the sliced ​​sheet sample, and the sheet sample The sample is added to the reaction solution and reacted for a preset time in the reaction container, and the reacted flake sample is subjected to electron and backscattered scanning electron microscope observation and X-fluorescence spectrum analysis, and the chemical composition of the reacted solution is analyzed to determine the reaction solution. The type and concentration of ions in the reaction solution are judged to determine the source of the components in the reaction solution, and the characteristics of the composition change before and after the reaction of the sheet sample are determined. The phreeqc numerical simulation calculation is performed on the solution after the reaction, and the saturation index of the minerals in the solution is calculated to determine the dissolution of the sheet sample. Dissolution and types of nascent minerals, guided reaction mechanisms and SEM observations. The above method has high experimental accuracy and high practicability.

Description

technical field [0001] The present invention relates to a method for fluid-rock interaction testing. Background technique [0002] The geochemical simulation of fluid-rock interaction is based on the principles of chemical thermodynamics to study the possible chemical reactions between minerals, gases, organic matter and aqueous solutions in the system under different temperature and pressure conditions. People have done a lot of work through autoclaves to explore the control The factors of feldspar dissolution include the type of organic acid and its ions, pH value, temperature and pressure conditions, etc. However, the experimental devices and experimental methods of traditional research have the following shortcomings: 1. It is difficult to distinguish whether the later sample changes are caused by the experiment or the traces of the original sample; Distinguishing the positive and negative sides of the sample makes it difficult to interpret the experimental test results...

AI Technical Summary

Problems solved by technology

However, the experimental devices and experimental methods of traditional research have the following shortcomings: 1. It is difficult to distinguish whether the later sample changes are caused by the experiment or the traces of the original sample; Differentiate the positive and negative sides of the sample, which makes it difficult to interpret the experimental test results; 3. Weak acid and weak base conditions are often inconsistent with the actual formation conditions

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