油层厚度对井模型下蒸汽辅助重力驱稠油开发的影响.

Steam assisted gravity drainage（SAGD） heavy oil development technology is influenced by development factors and geological factors, among which reservoir thickness is an important factor affecting the development of steam chamber and the state of steam, water and oil interface inside the steam chamber. The two main steam-assisted gravity drainage models are the double horizontal well model and the vertical-horizontal well combination model. In this paper, combined with the actual production data of Guantao block in Liaohe oilfield, the conceptual model under multiple well groups was established by using CMG-STARS software, and the control variable method was used only to change the single factor of reservoir thickness. The influence of reservoir thickness on the development effect of steam assisted gravity drainage was analyzed comparatively. In the case of the well group in this conceptual model,a thickness of around 50mis a threshold for variation in the effectiveness of SAGD development.In the early stage of SAGD development,the thickness of the double horizontal well is about 55m.In the later stage of development,the greater the thickness,the better the effect.The higher the reservoir thickness is,the better the effect is.When the reservoir thickness is more than 50m,the improvement trend of injection and production effect becomes relatively slow. [ABSTRACT FROM AUTHOR]