Simulating Oil and Gas Generation Using Diamond Anvil Cell:Analysis of Image Monitored In-Situ during Pyrolysis of Source Rocks

• Main Authors: Ruei-Fu Weng, 翁瑞富
• Other Authors: Wuu-Liang Huang
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/19835671734149134289

碩士 === 國立臺灣大學 === 地質科學研究所 === 89 === The research in petroleum generation is essential to better understanding of a petroleum system. New experimental procedures are developed in this study by applying the visual capability of diamond anvil cell to the analysis of source rocks. By controlling heating rate, pressure and openness, this work simulates the maturation of a variety of source rocks at different experimental conditions, and records the whole reaction process in-situ with digital camera. The qualitative and quantitative information has been obtained from the dynamic images. In the qualitative aspect, the whole process of oil generation from source rocks can be perceived via the visual observation of a variety of samples during pyrolysis. In the quantitative aspect, the variation and the extent of reactions can be quantified by measuring the change of sample area during the pyrolysis. In addition, we try to use the quantitative results at different heating rates to calculate the kinetic parameters. The results reveal that this technique can be used to distinguish oil-prone sample from gas-prone sample. Through the understanding of the visual characteristics of the oil generation, we are able to establish visualization indicators for systematically describing the oil generation process. On the other hand, the quantitative information of the variation of sample area, which can be correlated to the degree of kerogen to oil transformation, has been used not only for the comparison and evaluation of different source rocks, but also for determining the kinetic parameters of the transformation. Finally, the comparison with the result of Rock-Eval pyrolysis reveals a reasonable correlation in Tmax between these two methods. This confirms that this technique is not merely a tool of simulating oil generation and acquiring the valuable visual images, but a complementary method to measure the quantitative information similar to the conventional pyrolysis method.