针对海上某油田现场使用的化学生热体系铵盐和亚硝酸盐体系,建立了注入和关井过程的数学模型,采用有限差分法计算了2个过程中的温度场分布,在此基础上研究了不同排量和不同浓度对温度场分布的影响。依据本文计算结果和研究成果,指导该油田实施了7井次化学生热技术解堵作业,取得了明显的油井复产增油效果,典型见效井平均日增油幅度高达728%。 Aiming at the chemical heat system ammonium and nitrite systems used in the field of a certain offshore oilfield, a mathematical model of injection and shutdown process was established. The temperature field distribution in two processes was calculated by finite difference method. Based on this, The effect of different displacement and different concentration on the distribution of temperature field. According to the calculation results and the research results, it instructs the oilfield to carry out 7-well chemical pyrolysis technology to remove the plugging operation and obtain obvious oil production and oil recovery effect. The average effective oil-raising rate of typical effective wells reaches as high as 728%.