Research And Application Of Steam Parameters In Wellbore Of Thermal Recovery In YING27 Block

In the course of steam flooding, it is requisite to know four kinds of steam parameters in the bottom of steam injectors.these parameters include pressure, temperature,flow rate and steam quality. However,in the actual process of production,only the parameters in the outlet of the boiler and wellhead of steam injectors can be got. In order to solve such problems, based on the previous study,this paper aimed at the steam injection stage and put forward the method that could be used to convert the parameters on the ground to those of underground,and then the corresponding software was developed. By using Orkiszewski,the flow pressure drop in the vertical wellbore could be calculated.With the energy equilibrium equation,the steam quality and temperature of steam could be got. Based on the radial flow model-Darcy's flow,the mathematical model of steam distribution along the wellbore is built, in which such factors as phase transition and uneven steam distribution are taken into consideration. The steam imbibitions per thickness could be calculated. Eventually,the parameters at any point along wellbore and corresponding steam imbibitions profile could be got. Analyzing of the example,this software was proved to be effective as well as useful.Based on the research above mentioned, the mathematical model is testified with the actual data offered by DONGXIN oilfield. It is indicated that the model can interpret the steam imbibitions and can reflect the relationship between the wellbore and formation. The study plays a important role in thermal recovery of heavy oil.