吉林桦甸油页岩原位近临界水热解开采室内实验

Laboratory Experiment of In-situ Conversion Process in Near-critical Water of Huadian Oil Shale of Jilin

从多学科交叉角度出发,将油气生排烃实验地质技术、绿色化工等相关领域方法引入到油页岩原位开采中。选取吉林桦甸油页岩样品,利用地层孔隙热压生排烃模拟实验仪开展了原位干馏热解和近临界水热解实验。研究表明:近临界水热解促进了油页岩原位油气转化,高温高压近临界水、反应生成的高含CO2的气体和较高的地层流体压力提高了油页岩原位页岩油潜在可采率/回收率,展现了利用近临界水特性开采油页岩,尤其是低品质油页岩的良好前景。针对我国油页岩资源埋藏深、品位低、非均质性强的情况,可以考虑利用近临界水做热传导介质和水溶解性催化剂,对地下油页岩进行原位开采。

From multidisciplinary perspective,the experimental technology of oil and gas generation and expulsion,oil exploration,oil and gas refining,green chemical process and other related fields methods were introduced to in-situ oil shale conversion process,selected Huadian oil shale as the sample,carried out in-situ retorting experiment and in-situ conversion process experiment of near-critical water with the formation porosity thermocompression simulation appartus of hydrocarbon generation and expulsion. It can be seen： the near-critical water promoted the conversion rate of oil shale in-situ conversion process. Higher temperature and higher pressure near-critical water,high content of CO2 gas generation and higher formation fluid pressure increased the potential of in-situ shale oil recoverable rate,showing a good prospect of oil shale in-situ conversion process using near-critical water,especially the low-quality oil shale. In view of the oil shale resources buried deep,low grade,strong heterogeneity of the situation,proposed in situ oil shale underground mining concept using near-critical water as heat transfer medium and the catalyst of water solubility.