Thermal simulation experiment method for hydrocarbon-water-rock interactions based on isotope tracing

A method for a thermal simulation of hydrocarbon-water-rock interactions based on isotope tracing comprising the steps:

• step 1:
• conducting hydrocarbon-water-rock thermal simulation experiments:
• combining n-eicosane, water, and grains of a feldspar in a reactor, and sealing the reactor under argon;
• heating the reactor for a reaction and quenching the reactor with water to room temperature at an end of the reaction to produce a plurality of samples;
• step 2:
• testing the plurality of samples obtained in step 1 after the reaction to obtain data comprising a composition and a content of a gas product, an isotopic composition of the gas product, an isotopic composition of a water solution, an isotopic composition of an authigenic clay, high-field nuclear magnetic resonance (NMR) spectra of liquid hydrocarbons and the water solution in the plurality of samples, a mineral texture, and a mineral composition;
• step 3:
• deciphering genesis of the hydrocarbon-water-rock interactions:
• based on the data obtained in step 2, analyzing genetic mechanisms of a mass exchange and an occurrence of the hydrocarbon-water-rock interactions;
• wherein in step 1, the n-eicosane is n-C20H42 or n-C20D42;
• the water is H218O, D218O, or D218O;
• and the feldspar is K-feldspar.