Device for testing reaction between supercritical carbon dioxide and rock

A device for testing a reaction between supercritical carbon dioxide and a rock, comprising:

• a carbon dioxide pressurization system configured to liquefy, heat and vaporize an initial carbon dioxide gas to obtain gaseous carbon dioxide;
• a reaction system connected with the carbon dioxide pressurization system and configured to regulate and control a temperature and a pressure to change a state of the gaseous carbon dioxide to obtain the supercritical carbon dioxide, and to enable the supercritical carbon dioxide to react with a sample, so as to obtain reaction products, wherein the reaction products comprise a reaction residual water source, a reaction sample and residual supercritical carbon dioxide;
• a contact angle test system connected with the reaction system and configured to convey the reaction residual water source, to receive the residual supercritical carbon dioxide, and to carry out a contact reaction of the residual supercritical carbon dioxide, the sample and the reaction residual water source;
• and
• an observation system connected with the contact angle test system and configured to acquire an included angle between the reaction residual water source and the sample when the contact reaction is carried out in the contact angle test system, wherein the included angle is configured to characterize a measure of a degree of wetting of an in-situ measurement in a supercritical carbon dioxide environment;
• wherein
• the measure of the degree of wetting is designated as θ;
• θ=0 means complete wetting;
• θ<90° means partial wetting or wetting, where the sample is hydrophilic, and the smaller the included angle, the better the wettability;
• θ=90° is a division line of wetting or not;
• θ<90° means no wetting, where a surface of the rock is hydrophobic, the greater the included angle, the poor the wettability;
• and θ=180° means no wetting at all;
• and
• wherein the contact angle test system comprises:
• a drip valve connected with the reaction system and configured to convey the reaction residual water source;
• and
• a contact-angle high-pressure chamber connected with the reaction system and the drip valve and configured to receive the residual supercritical carbon dioxide and the reaction residual water source, and to carry out the contact reaction of the residual supercritical carbon dioxide, the sample and the reaction residual water source.