Nitrogen Pyrolysis Products of Organic-Rich Shale

The rapid development of the economy has resulted in an increase in our demand for petroleum resources. Organic-rich shale has received extensive attention both at home and abroad due to its enormous development potential. This article used a high-temperature and high-pressure reactor to conduct 2 h pyrolysis experiments on Longkou organic rich shale core samples in N2 atmosphere at temperatures of 385 ℃, 405 ℃, 425 ℃, and 450 ℃, respectively, to study the characteristics of oil and gas products from organic-rich shale pyrolysis at different temperatures. The results show that the CH4 and C2–C5 alkanes in pyrolysis gas increase with the increase of pyrolysis temperature, which is conducive to the pyrolysis transformation of organic matter in organic-rich shale. As the pyrolysis temperature increases, the relative content of CO2 increased first and then decreased, and the relative content of H2 increased gradually. With the increase of pyrolysis temperature, the content of heavy components in shale oil decreases, while the content of light components increases, and the quality of shale oil becomes lighter. Controlling appropriate pyrolysis temperature can effectively change the composition of shale oil products and the distribution of hydrocarbon components, so as to achieve the goal of controlling the output of target products. By analyzing the pyrolysis products of shale at different temperatures, the distribution of pyrolysis products of organic-rich shale under N2 condition is clear, which is of great significance to guide the in-situ development of organic-rich shale.