Online monitoring device and method for in-situ mining of shale oil through combination of laser and supercritical water

The invention discloses an on-line monitoring device and method for in-situ mining of shale oil through combination of laser and supercritical water. The on-line monitoring device comprises a laser generating device, a gas generating device, a supercritical water generating device, a heating device, an on-line monitoring device and the like. The laser generating device generates high-energy laser beams, the gas generating device generates active gas, the oil shale layer is heated underground through the heating device, the online monitoring device monitors in-situ shale oil exploitation conditions online and observes operation site pictures in real time, and the supercritical water injection device injects generated supercritical water into the oil shale layer. And entering a pore throat. The high-energy laser beam acts on the active gas, so that the gas is activated, an explosive thermal chemical reaction occurs, the oil shale is crushed and chemically modified, and finally the shale is quickly crushed. According to the method, environmental pollution caused by shale oil in the ground refining process can be avoided, the economic benefit is high, the production cost can be effectively reduced, the working efficiency is improved, and the oil yield is greatly improved.