Improve Light Hydrocarbon Recovery Rate Process Parameters

Starting with the functions and prosperous developments of natural gas, this thesis presents the aims and significance of the hydrocarbon recovery and then illustrates the current situations of the natural gas hydrocarbon recovering process techniques home and abroad. Meanwhile, it is point out that the future research on the hydrocarbon recovery process techniques is to be conducted mainly depending on the condensate separating method, in the process of which energy conservation, consumption decreasing and enhancement of hydrocarbon recovery ratio are also studied and developed in order to improve the whole profit of the hydrocarbon recovery unit.In the second part of this thesis, the software Hydrocarbon Recovering Parameter and its Process Computation is developed based on the deep analysis and research on the calculation theories, the mathematic models and its algorithm of BWRS state equation and its parameter, vapor-liquid equilibrium process and hydrocarbon recovering process unit. This software can be setup and run on the platform of Windows98, Windows2000 and Windows XP. The whole program is made up of nine parts. It can calculate the natural gas made up of 18 components. Users can put the data into the computer through the program interface, and the results appear on the interface after the program has been run. For the convenience of understanding the process, the program provides the flow diagrams of some process units. The software is tested by the project calculation and the results prove that its running is reliable and the final data is exact, which can meet the needs of calculation, selecting hydrocarbon recovery process by means of low temperature separating method.In the following part, according to the characteristic of the distributions and composition of the natural gas in China, it calculates the liquefaction ratio of hydrocarbon of the four kinds of typical natural gas and the natural gas of main oil-gas field with the aid of this program in China. The program also renders aids to plot the curve diagram of the relations among the liquefaction ratio of hydrocarbon, temperature and pressure basing on the results of the calculation. By analyzing the results of the calculation of the liquefaction ratio and its curve diagram, it summarizes the changes of the liquefaction ratio of hydrocarbon and its influential factors when the composition, temperature and pressure of natural gas change. It proposes that the methods and the principles of improving the liquefaction ratio of hydrocarbon and choosing the appropriate hydrocarbon recovery process. At the same time, according to the changing raw of the liquefaction ratio of hydrocarbon of natural gas from the main oil field inChina, it also makes the proper alternative designs of hydrocarbon recovery for the oil-field gas, condensate gas-field gas and gas-field gas.In the end, the thesis makes an overall summary of the whole research, proposes the results and presents the future recommendation for the future study.