The problem of calculation of penetration range of oil in soil with different particle diameters could be molded by software CFD. It can build three-dimensional flow and mass coupling model with water-oil flowing separately in porous soil media. The simulation shows that oil diffuses in U shape in soil with bigger particles (0.5 mm and 0.221 mm); while it diffuses in egg shape in soil with smaller particles (0.147 mm and 0.098 mm); and oil diffuses in pear shape in soil with tiny particles (0.021 mm and 0.002 mm). The diffusion rate of oil in the six different soils is nearly same in the first minute; the rate increases gradually in five kinds soil with (0.5 mm-0.021 mm) different particle diameters in the next four minutes. The speed in 0.021 mm diameter soil is faster than that in soil of 0.5 mm by 12%. The diffusion rate is nearly same in soil of 0.021 mm diameter and 0.002 mm diameter.

According to the clogging problem of emitter, the computational fluid dynamics (CFD) numerical model for the labyrinth channels of drip irrigation emitters was established by used the method of combining AutoCAD with ANSYS. Computational fluid dynamics method was applied to calculate the relationship between the discharge and the pressure of the square labyrinth path irrigation emitter in ordinary use and the distributions of the pressure and velocity inside the emitter. The calculated results are that the pressure change in the emitter is linear with the length of the flow path and there are the flow stagnant areas at different degree between the two ends of the path tooth point. By compared and analyzed, the labyrinth path structure was redesigned in accordance with the streamline shape distribution of the main liquid in the path, and the simulation of the path was employed. So the structure of channel was optimized and the anti-clogging ability of the labyrinth irrigation emitter was improved. The computational simulation method could provide theoretical basis for the further study on the hydraulic performance of he irrigation emitter and the rapid development of the integral irrigation emitter.

When jams happen to a oil pipeline suddenly, transient pressure mutations will appear in the blocked pipe. It causes a pressurization wave and a decompression wave which respectively spread to the upstream and the downstream at a certain speed. Through establishing hydraulic transient model of pipe jams, using Visual c++ 6.0 to program the characteristics analysis program of jams hydraulic, taking specific pipeline, the characteristics of transient hydraulic which was caused by different jams acreage was simulated. The simulated results show that pressure and flow rate is affected by the different jams acreage. 

Considered that the mixed oil would be produced in the batch transportation of the product oil pipeline, the highest revenue in the life cycle as the objective function, the diameter and the wall thickness as the decision variables, a product pipeline network optimization model was set up. The calculation formula based on diffusion theory and empirical formula were used to calculate mixed oil quantity. And the genetic algorithm was used to solve the model. The results show that the design of mixed oil costs account for 3% to 10%, and it’s related to the factors as the transportation batches per year, the number of species transported in each batch and the cost on management of oil mixture per unit volume. Generally mixed oil loss can’t be ignored, and the weight coefficient method can be used for a variety of design options. Using different formulation often got different result, so in practical engineering projects the closest formulation can be chosen to calculate.v

The conditions of coke formation and conversion of residual oil hydrocracking were studied intensively. Conditions included reaction temperature（410～440 ℃） and partial hygrogen pressure（3.0～7.0 MPa）and time（20～80 min）. The experiment was carried in high pressure autoclave without catalyst. The degree of coke and conversion of residual oil hydrocracking increased as reaction temperature and time and partial hygrogen pressure  increased,  but partial hydrogen pressure  effected the degree of coke slightly. The results show that the optimum condition is: at 430 ℃ and 7.0 MPa when reacting 20 min. 