Offshore block M is a thin layer heavy oil reservoir,which is developed by hori-zontal well steam flooding.The development of steam cavity is affected by the early well pat-tern and the late superior permeability channel.Therefore,based on the numerical simula-tion method,the effects of crude oil viscosity,formation dip angle,plane permeability differ-ence,steam injection temperature,steam injection speed,steam injection dryness and pro-duction/injection ratio on the equilibrium development of steam cavity in horizontal wells steam flooding were analyzed with the outburst coefficient as the evaluation index.Based on the analysis results,coefficient of variation S was introduced as the evaluation index to repre-sent the sensitivity of the outburst coefficient within the study range.The results show that the main controlling factors affecting the equilibrium development of steam cavity in thin layer heavy oil horizontal wells steam flooding are production/injection ratio,injection dry-ness and formation dip angle.The development design of steam flooding in horizontal wells can be optimized according to the influence of each controlling factor on the equilibrium de-velopment of steam cavity.
关键词
薄层稠油/水平井/蒸汽腔/均衡发育
Key words
thin layer heavy oil/horizontal well/steam chamber/balanced development
维普
万方数据