Research On The Process Of Underground Mining In Situ And Pyrolysis Of The Oil Shale

As an important alternative energy, oil shale cause more and more attention, its oil reserves are proven nearly five times of the reserves of crude oil. With its low calorific value and buried relatively deep, oil shale failed to get large-scale mining. With crude oil reserves to reduce, crude oil prices too high, people begin to pay close attention to the exploitation of oil shale.According to the properties of oil shale, the in-situ conversion process (ICP) technology for oil shale development was proposed. This technology has the advantages of low cost and less pollution which is different from the traditional technology for oil shale development.The weightlessness of high-temperature dry distillation and thermal cracking characteristics of oil shale showed that the main pyrolysis zone of oil shale ranged from350℃to500℃. The oil shale after high-temperature pyrolysis produced lots of pore and fracture, which could effectively improve the permeability of oil shale and create good conditions for output of oil and gas. The energy conservation equation considering the chemical reaction heat was established on the basis of the ICP technology. The numerical simulation of oil shale development using ICP technology was carried out with the software of Fluent method. The variation laws of temperature changing with time and pyrolysis area of oil shale underground were obtained. The output of oil and gas were calculated in the small scale oil shale development area using ICP technology.