Research On The Control System Of Oil Extraction Joint Station Based On PLC

The cementing quality of a number of blocks in Dagang oilfield could not be guaranteed and it is always a very negative factor of the subsequent oil production. In this research, the difficulty of cementation in Dagang oilfield is analyzed, the major restrictive factors in cementing quality are pointed out and the preliminary measures of cementing quality improvement in Dagang oilfield are formulated by researching the formation, analyzing the flow pattern of cement slurry and drilling fluids, studying the influential factors of displacement inside and outside the annulus space and researching the near-balanced and overbalanced well cementation.Drilling pressure balancing and dynamic cementing pressure balancing is continuously upgraded, slurry system is optimized repeatedly, filtrate reducer and channeling Inhibitor are optimized in selection and ameliorated with a large number of theoretical study and field experiment. Then as a result, the cementing quality in Dagang oilfield is improved apparently. Finally, a set of cementation program in cementing quality improvement in Dagang oilfield is formulated, popularized and implemented after being experimented, analyzed and summarized on several blocks. From then, the cementing quality in high later efficiency wells, high pressure and low permeability formation and viscous crude blocks is improved distinctly.