Laser Probe Of Oil Shale For Characterizing And Evaluating The Oil Yield

Unconventional oil and gas resources have attracted people’s great attention under the huge demand of energy.As an important potential energy,Oil shale has become one of research hotspots in the field of oil and gas.Oil content is one of the main factors to evaluate the quality of the oil shale,and also the core parameters to examine the economic benefits of the oil shale.It’s urgent in industry to get an accurate,fast and portable method to determine the oil yield.Photoelectric detection technology was applied in the thesis to characterize the oil yield in oil shale,based on the interaction of light with matter.Typical photoelectric response was found in oil shale under the irradiation of laser.The nanosecond response signal was measured under the irradiation of ultraviolet laser pulse.The laser-induced voltage increased with the irradiation energy density.The response sensitivity can reach 17 mV/mJ.Then the photoelectric effect was researched in the oil shale samples of Longkou,Yaojie and Barkol under the irradiation of continuous laser.The laser-induced voltage of 65 mV、33 mV、5.2 mV were required in the three samples respectively under the irradiation of 532 nm continuous laser with the energy density of 0.15 mJ/mm~2.The laser-induced voltage reduced with their oil yield of 14.16%、9.05%、5.66% in the three samples of Longkou,Yaojie and Barkol,respectively.The results show that the oil yield can be characterized with the laser-induced voltage in oil shale.It was preliminarily determined that the laser-induced voltage was related with the organic matter in oil shale.The photoelectric characteristics of oil shale and its microcosmic mechanism were analyzed in the thesis,and also the influence of oil shale organic matter on the photoelectric effect.Based on the above research,a portable testing device that suitable for the oil yield of oil shale was developed.