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为改善大庆油田某开发区过渡带地区的开发效果,在原油粘度相对较高的三、四条带选择有利区域开展蒸汽驱现场试验。根据注汽井的动态变化以及出现的问题,通过分析给出建议并跟踪效果,找出影响注汽效率的各项因素;根据注汽过程中油层变化情况,找出过渡带地区注蒸汽采油的影响因素;根据整个注采关系的动态变化规律及分析,分析稀油油藏利用蒸汽驱的可行性及注汽规律。研究蒸汽驱提高过渡带采收率技术的可行性,确定合理的井网井距,优化注入参数,为蒸汽驱在过渡带油藏的挖潜提供实际建议,为大庆油田过渡带稀油油藏增储上产探索新的技术途径。
In order to improve the development effect in the transitional zone of a development zone in Daqing Oilfield, field trials of steam flooding were carried out in the favorable areas of three or four zones with relatively high crude oil viscosity. According to the dynamic changes of the steam injection well and the problems that occurred, the author gives suggestions and tracks the effects through analysis, and finds out the factors that affect the efficiency of steam injection. According to the changes of the oil layers in the process of steam injection, According to the dynamic change law and analysis of the relationship between injection and production, the feasibility of steam flooding in dilute oil reservoir and the rule of steam injection are analyzed. To study the feasibility of steam flooding to improve the recovery rate of transition zone, determine reasonable well spacing, optimize injection parameters and provide practical suggestions for tapping potential of steam flooding in transition zone reservoirs, Reserve production to explore new ways of technology.