Heating constant temperature method suitable for ct scan core displacement experiment and capable of simulating reservoir conditions

Abstract

The invention provides a constant-temperature heating method suitable for CT (computerized tomography) scanning rock core displacement experiments and capable of stimulating oil reservoir conditions, which comprises the following steps: a confining pressure liquid is heated in a constant-temperature heating unit to a preset temperature and injected into a confining pressure space of a rock core holder at constant speed, and flows out through an outlet of the confining pressure space; the confining pressure of the rock core holder is controlled to a preset pressure by using a back-pressure valve; after being heated by the constant-temperature heating unit, the confining pressure liquid flowing out through the outlet of the confining pressure space and the confining pressure liquid entering an inlet of the confining pressure space form a cycle; the confining pressure liquid in the confining pressure space enables the rock core to reach the preset temperature and keep the temperature constant; and the constant-temperature heating unit is positioned outside the rock core, outside the rock core holder and outside the CT scanning area. The method achieves the effect constant-temperature heating and constant confining pressure without influencing the CT scanning, is used for CT scanning rock core tests, and solves the technical problem of providing high-temperature high-pressure conditions in CT scanning rock core displacement experiments.

Description

technical field [0001] The invention relates to a core displacement experiment, in particular to a heating constant temperature method suitable for a CT scanning core displacement experiment and capable of simulating reservoir conditions, in particular to a heating constant temperature control method suitable for a CT scanning core displacement experiment. Background technique [0002] As a routine testing technique in core analysis, CT technology is widely used in core description, core heterogeneity determination, core sample processing program determination, fracture quantitative analysis, online saturation measurement, flow experiment research, etc. Using CT scanning technology, it is possible to conduct visual research on the core displacement process, obtain information on the distribution of fluid saturation in the core, deeply understand the oil production mechanism, monitor fluid dispersion and channeling characteristics, and understand the impact of polymer flooding...

AI Technical Summary

Problems solved by technology

[0004] In summary, the following problems exist in the prior art: in the core displacement experiment of CT scanning, it is difficult for the core to reach the set temperature and maintain a constant temperature

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