Research on Shutdown and Restart of Doped Shale Oil Pipeline in Changqing Oil Field
The basic physical properties such as density and heat capacity of a shale oil in Changqing oil field was analyzed firstly.Then the adding condition of the depressant was optimized.And the optimal heat treatment temperature and dosing concen-tration was determined.Finally,based on the basic design conditions of shale oil pipelines,SPS software was used to carry out the simulation research on the shutdown temperature drop and restart of pipelines under different seasons and different flow conditions.The research results show that the shale oil has excellent perceptibility to the PPD,and the optimal heat treatment temperature is 50℃and the optimal dosing concentration is 20 ppm.Meanwhile,the pipeline can be restarted successfully after 100 h stoppage under different transport volume in both winter and summer,which is of great significance to the security of shale oil pipeline.
shale oilpipelinethermal treatmentPPDshutdown and restartflow assurance
NETL
NSTL
万方数据
维普
