poor gas
1.For gas reservoirs with high-low effectiveness, the variable porosity and variable gas saturation are simulated by AVO technique, coming to the conclusion that the AVO abnormal responses from gas reservoir with good gas-bearing property belong to Class-III, while those from one with poor gas-bearing property belong to Class-I and Class-II.
2.In the South China gas accumulation region,there are mainly the medium and small scale target areas with much more poor in gas ones,the large scale target areas are all located in the South Sichuan North Guizhou and East Yunnan West Guizhou gas accumulation zones,and the large scale rich in gas target areas occur in the East Yunnan West Guizhou gas accumulation zone only.
5.Abstract: The causes for low efficiency of the heater in No.2 Crude Unit of JPC refinery are described and analyzed including water leaking of steam soot blower,dew point corrosion caused by steam,soot deposits in convection chamber owning to poor soot blowing,high flue gas temperature,no heat recovery of flue gas,and poor performance of insulation lining,etc.By using sonic soot removing system,flue gas recovery system,spray coating of fiber and rock wool,as well as adjustment of flow scheme accordingly in the technical revamping.The dew point corrosion is completely eliminated,the insulation performance is improved,the heat loss is reduced by 1.25%,the flue gas temperature is reduced to about 170 ℃,and the heater efficiency is increased from 83%to more than 90%.
6.Experimental results show that each algorithm has its advantages and disadvantages. LBP method is faster than other method but often with poor image quality, iterative algorithm can characterize solid-gas flow behavior more accurately, fast iterative algorithm has the same image quality as iterative method but with much faster speed of image reconstruction.
7.The problems of higher production consumption, low load, poor operation stability and product quality in ammonia stripping urea plant were analyzed in this paper and the causes such as lower reactor conversion rate, poor MP absorber efficiency, not sufficient recovery capability of MP and LP inert gas recovery system, poor design of prilling basket were discussed and then resolving methods were put forward.
