稠油老区直井火驱驱替特征与井网模式选择

发布时间：2018-11-02 20:52

【摘要】：伴随着直井火驱技术在新疆、辽河等注蒸汽稠油老区的成功试验和工业化应用,其提高采收率的潜力正得到广泛认同。通过室内实验、矿场试验和油藏工程等多种方法,系统研究了稠油老区直井火驱的驱替特征。室内实验和矿场取心资料证明,直井火驱具有较高的驱油效率,燃烧前缘波及范围内基本没有剩余油,可实现较高的平面波及系数和最终采收率,是一种后续无需再转换开发方式即可实现大幅度提高采收率的战略性接替技术。基于以上研究,全面论证了面积火驱和线性火驱两种井网模式的开发特点及各自优势,并将研究成果应用于新疆红浅火驱工业化试验方案设计中。研究表明,线性井网具有地面设施建设及管理容易、阶段管理井数少、配套工艺相对简单、燃烧前缘的目的性调控容易实现等优点,面积井网则在降低火驱阶段空气油比、提高油藏总的采油速度、减少地质及油藏管理风险等方面具有优势。火驱井网的选择应重点考虑地质、储层及流体物性、油价、油藏已开发程度等因素。红浅火驱工业化试验方案采用了新、老井组合下改进的线性井网模式,既吸取了线性井网先导试验的经验教训,也借鉴了面积井网的相关优点。
[Abstract]:Along with the successful test and industrial application of the fire drive technology for straight wells in the old areas of steam injection heavy oil such as Xinjiang and Liaohe, its potential to improve oil recovery is widely recognized. Through laboratory experiments, field tests and reservoir engineering, the displacement characteristics of fire flooding in old heavy oil wells are systematically studied. Laboratory experiments and field coring data show that the vertical well fire flooding has higher oil displacement efficiency, and there is basically no residual oil in the range of combustion front sweep, which can achieve higher plane sweep efficiency and final oil recovery. It is a kind of strategic replacement technology which can improve oil recovery greatly. Based on the above research, the development characteristics and respective advantages of two well pattern patterns of area fire drive and linear fire drive are fully demonstrated, and the research results are applied to the design of industrial test scheme for red and shallow fire flooding in Xinjiang. The results show that the linear well pattern has the advantages of easy construction and management of surface facilities, small number of wells in stage management, relatively simple matching process, easy realization of purposeful control of the combustion front, and so on. The area well pattern is reducing the air-oil ratio in the stage of fire drive. It has advantages in increasing oil recovery rate and reducing geological and reservoir management risks. The selection of flame-drive pattern should focus on geological, reservoir and fluid physical properties, oil price, reservoir development degree and other factors. The industrial test scheme of red and shallow fire drive adopts the improved linear well pattern under the combination of old and new wells, which not only draws lessons from the pilot test of linear well pattern, but also draws lessons from the relative advantages of area well pattern.
【作者单位】：中国石油勘探开发研究院提高石油采收率国家重点实验室;中国石油新疆油田公司勘探开发研究院;
【基金】：国家重大科技专项“火烧驱油技术研究与应用”(2016ZX05012-002)资助
【分类号】：TE357.44

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