快速均匀启动技术改善蒸汽辅助重力泄油预热效果

发布时间：2019-07-05 13:25

【摘要】：预热效果对蒸汽辅助重力泄油(SAGD)开发井组的见产速度和生产效果均有直接影响,研究高效的预热方式对提高SAGD开发效果有重要意义。以现场快速均匀启动试验为例,采用数值模拟方法揭示了快速均匀启动技术的高压扩容机理,并优化了快速均匀启动操作压力。研究结果表明:通过在注采井间形成高孔隙度、高渗透率和高含水带,可以加速蒸汽与岩石之间的热对流,从而实现双水平井井间快速均匀热连通;快速均匀启动存在最佳操作压力,该压力与油藏地应力及岩石变形特征相关。进一步结合现场生产动态数据,分析了快速均匀启动技术的实施效果。分析结果表明,实施快速均匀启动井组的预热天数明显减少,预热阶段节省了蒸汽注入量,转生产后早期生产效果有显著提高,对指导稠油油藏SAGD高效开发具有重要意义。
[Abstract]:The preheating effect has a direct influence on the production rate and production effect of steam assisted gravity discharge (SAGD) development well group. It is of great significance to study the efficient preheating mode to improve the development effect of SAGD. Taking the field fast and uniform start test as an example, the mechanism of high pressure capacity expansion of fast uniform start technology is revealed by numerical simulation method, and the operating pressure of fast uniform start is optimized. The results show that the thermal convolution between steam and rock can be accelerated by forming high porosity, high permeability and high water cut zone between injection and production wells, and the rapid and uniform thermal connection between wells can be realized, and there is the best operating pressure for rapid and uniform start-up, which is related to the in-situ stress and rock deformation characteristics of the reservoir. Combined with the dynamic data of field production, the implementation effect of fast and uniform start-up technology is analyzed. The analysis results show that the preheating days of fast and uniform start-up well group are obviously reduced, the steam injection amount is saved in the preheating stage, and the early production effect is significantly improved after conversion to production, which is of great significance to guide the efficient development of SAGD in heavy oil reservoirs.
【作者单位】：提高石油采收率国家重点实验室;中国石油勘探开发研究院;中国地质大学(北京)能源学院;
【基金】：国家科技重大专项“改善SAGD开发效果技术研究与应用”(2016ZX05012-002)和“稠油、碳酸盐岩和致密油藏开发主体技术与应用潜力”(2016ZX05016-006)
【分类号】：TE345

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