Method for monitoring geothermal reservoir temperature and fracture distribution and device thereof

Abstract

The invention discloses a method for monitoring geothermal reservoir temperature and fracture distribution and a device thereof. According to the method, the temperature distribution of a geothermal reservoir can be obtained by performing one time of measurement through a nanometer tracer, the returned curve can be used for determining time of reaction of a threshold nanometer tracer, then the threshold temperature position of the geothermal reservoir is reversely determined through time, finally the temperature distribution of the geothermal reservoir is determined by combining the response curve of the threshold nanometer tracer and a non-nano tracer, and finally the fracture distribution of the geothermal reservoir is determined according to the number of the threshold nanometer tracer in at least two production wells so that real monitoring of the temperature distribution and the fracture distribution of the geothermal reservoir can be realized, and repeated measurement of the temperature and fracture distribution situation of the geothermal reservoir can also be realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of geothermal reservoir development, in particular to a method and device for monitoring the temperature and fracture distribution of geothermal reservoirs. Background technique [0002] With the increasing shortage of non-renewable traditional energy sources such as petroleum and coal, the status of green renewable energy represented by wind energy, solar energy, and geothermal energy has become increasingly prominent. The most potential energy resource in the 21st century. Since hot dry rocks often lack sufficient permeability / porosity, the connection between injection wells and production wells must be established through artificial fracturing, and in order to establish a sustainable enhanced geothermal system and avoid thermal breakthrough phenomena, injection must be considered at the same time. The connectivity between water wells and production wells and the reservoir fractu...

AI Technical Summary

Problems solved by technology

This method has problems such as half-life and radioactivity, and radioactive materials may appear to be stratified or separated as the fracturing fluid travels in the fracture, and the final results cannot reflect the actual fracture structure.

The near-field monitoring method using radiotracer logging technology needs to be measured immediately after fracturing, does not have the ability of real-time monitoring, and can only obtain fracture parameters near the wellbore

Images