A new method for predicting production performance with cyclic steam stimulation of horizontal wells based on non-isothermal heating zones in thick heavy oil reservoirs
A new method for predicting production performance with cyclic steam stimulation of horizontal wells based on non-isothermal heating zones in thick heavy oil reservoirs
The current classic models used are not suitable for production prediction of thick heavy oil reservoirs using horizon-tal wells with cyclic steam stimulation.In this paper,a new method for thick heavy oil horizontal wells with steam injection was proposed based on a non-isothermal heating zone,in which the effects of non-isothermal heating and permeability anisotropy were considered.After verifying the accuracy of the new method,the temperature distribution of the heating zone,its front edge,the production capacities under different production schemes and different permeability anisotropy conditions were ana-lyzed.The results show that the new method can accurately predict the average temperature,pressure,and front edge position of the heating zone.Within the same steam stimulation cycle,the front edge of the heating zone gradually expands as production progresses.Under the same production time,the front edge of the heating zone expands with the increase of the stimulation cy-cles.When maintaining a low bottomhole pressure with a high production rate,the average pressure in the heating zone be-comes lower,and the pressure decline in the reservoir is faster,and vice versa.The impact of permeability anisotropy needs to be fairly considered in order to obtain an accurate production prediction of horizontal wells with cyclic steam stimulation.
关键词
厚层稠油油藏/水平井蒸汽吞吐/产能/非等温加热区/加热区前缘
Key words
thick heavy oil reservoirs/cyclic steam stimulation using horizontal well/production performance/non-isother-mal heating zone/front edge of heating zone
维普
万方数据