The settlement of thermal insulation materials for overhead heavy oil injection pipelines will have a significant impact on the assessment of pipeline heat loss and calculation of economic benefits. A heat transfer model of the heat⁃insulating material settlement steam injection pipeline was established, and the effects of environmental wind speed, pipeline diameter and soil radiation on pipeline heat loss were analyzed.The results show that increasing the outdoor environment wind speed leads to increased heat loss of the eccentric insulation pipe, and when the environmental wind speed increases by 120%, the heat loss outside the pipeline insulation increases by 5.9%. The larger the pipe diameter, the smaller the heat loss of the air interlayer. The average heat flux of the outer wall of the insulated eccentric insulation pipeline is reduced by 1 036 W/m2 compared with the soil radiation.

The oil sand water agent was optimized, and the Inner Mongolia Tumuji oil sand was taken as the experimental object. The effects of reagent concentration, reagents sand ratio, mixing time, mixing temperature to the tailings residual oil rate were investigated. According to Tumuji oil sands, the results show that under the conditions of reagent concentration of 3.50%, agent sand ratio of 0.4∶1.0, mixing time of 25 min, mixing temperature of 90 ℃, the tailings residual oil rate can reach 0.71%. The improvement reduces the water agent consumption and the residual oil rate of the tailings.

Since the 1990s, regenerative flue gas waste heat recovery unit of high temperature air combustion technology was used widely in the steel, iron, glass and molten aluminum industry. But the application on the vapor injection boiler in oil field was rarely reported. The principle of the regenerative combustion technology was introduced. Fuel efficiency, energy saving rate and steam production mass rate of the steam injection boiler were respectively calculated under the condition of the same fuel, furnace, furnace outlet smoke temperature using the conventional combustion technology and regenerative combustion technology. The results show that after applying the regenerative combustion technology, the boiler could not only save energy and improve fuel efficiency, but also improve the steam production mass rate. At the same time, it also could realize the use of lowergrade fuels. According to the characteristics of steam injection boiler, regenerative combustion technology could be completely applied to the steam injection boiler.

 

 

Exploitation and research of compositive product, i.e. Corrosion Inhibitor, was carried out by the mixing of the main component of corrosion inhibitor with surfactants, chelate, organic amine and liquid of prefabrication, then the optimal proportion was found out in order to build the best matching systems. The models among the anti-corrosive capacity of the inhibitor and operation conditions were established by polynary quadratic regression. The optimum operation conditions obtained by non-linear programming (NLP) are the following: the amount of the surfactants, chelate, organic amine and the liquid of prefabrication is 0.112 6, 0.010 2, 0.213 9 and 0.357 2 respectively. The verified experiment showed that the products under the optimum operation conditions had the better water-soluble capablity, slower corrosion rate and higher anti-corrosive capacity (up to over 99%).

The catalytic performance of self- developed non-hydrogen-dewaxing catalyst (FC-DB) was evaluated, and the hydrocracking tail oil was used as feed stock. The influence of reaction temperature and space velocity on the yield and pouring point of base oil was investigated. The relationships between yield, pouring point and operation conditions were determined by polynary quadratic regression, and the optimum operation conditions were determined by non-linear programming. The reaction temperature is 400 ℃ and space velocity is 1.2 h-1. At this time, the yield and pouring point of base oil respectively are 92.53% and -20 ℃, approximately dropping 53 ℃. The qualify of base oil obtained under above optimum operation conditions was analyzed, and the base oil can be used as premium lubricant base oil because of its high viscosity index, low pouring point, acidity and residue carbon.