重油中添加金属催化剂的火烧油层实验

In-Situ Combustion Experiment by Adding Metal Catalyst in Heavy Oil

李 巍 刘永建 田歆源 耿志刚

LI Wei LIU Yongjian TIAN Xinyuan GENG Zhigang

针对重油在火驱过程中，燃料储集过量，导致燃烧时所需的空气注入量大，使得火驱开采的经济评价结果不理想等问题，选取硝酸铁和硝酸锌两种金属催化剂进行室内火烧油层的物理模拟实验。实验结果表明：与空白实验和硝酸锌催化实验相比硝酸铁催化实验过程中的产气成分波动小得多；硝酸铁催化实验出油时间也早于空白实验和硝酸锌催化实验的；重油中添加硝酸铁催化剂后，火烧油层模拟实验过程中的氧气利用率由空白实验的90.5%增至96.7%；烧掉重油量由43.92 kg/m3增至52.73 kg/m3，提高了20%；空气燃料比降低了19.5%，加速了火驱燃烧前缘的推进速度，残余油碳氢比、燃烧热、和残余重油量也显著变化。

For the problem that the excessive fuel reservoir bring on the huge requirement of air injection when it is burning, and the economic evaluation result of fire flooding is not ideal, an indoor physical simulation experiment of in-situ combustion was conducted by adding two metal catalytic, ferric nitrate and zinc nitrate. The experiment results showed that, the gas composition fluctuation of the ferric nitrate catalytic experiment during the process of heavy oil fire flooding was greatly reduced compared to that of the blank experiment and zinc nitrate catalytic experiment, ,and the oil-producing time of ferric nitrate catalytic experiment was earlier than that of the blank experiment and zinc nitrate catalytic experiment; the ferric nitrate catalyst could increase the oxygen utilization ratio from 90.5% to 96.7%;?the content of the heavy oil burnt increased form 43.92 kg/m3 to 52.73 kg/m3, increasing by 20%; the air-fuel ratio decreased by 19.5%; at the same time,? the propulsion speed of fire flooding combustion front accelerated, and hydro/carbon ratio, heat of combustion, and deposition quantity of fuel also changed significantly.