Abstract:

Physical modeling experiment is carried out to facilitate the understanding of the development of the steam chamber and the corresponding production characteristics of verticalhorizontal SAGD well pairs.Selfmade large scale,multifunctional 3D highpressure,hightemperature physical model and 2D visual scale model are employed.The model can be used for the optimization of development method as well as the study of the influence to the production with different geological and injection/production parameters.Based on the similarity criterion established,scale model on Du 84 bitumen reservoir is constructed ,experimental scheme of SAGD following CSS is designed.The law of the evolution of 3D and 2D temperature and pressure fields are established based on the realtime temperature and pressure data collected from survey points.Based on the above,with reference to the field data,SAGD mechanism is analyzed with the development of steam chamber and the corresponding production performances studied.The result of the experiment can provide sound basis for the implementation and adjustment of SAGD commercial productions in the field.

Key words: vertical/horizontal well pairs, SAGD, mechanism of development, development characteristics of steam chamber, experimental research