特低渗油田长6油层开发方案优化初探

发布时间：2018-06-19 06:18

本文选题：延长组 + 特低渗油田　；参考：《西安石油大学》2015年硕士论文

【摘要】：低渗透油藏储量占我国探明石油地质储量的65%以上,在今后相当长一段时间内低渗透油气藏将作为我国增储上产的主要资源基础。由于低渗透油气藏复杂的地质特征和渗流特征,导致低渗透油气藏普遍采收率低,开发存在很大难度。低渗透油气藏地下地质条件普遍以低孔、特低渗透储层为主要特征,油藏原始地层压力低,能量补充不足,在低渗透油气藏开发工作中的普遍特点是单井产量低、效益差。延长油田七里村采油厂是我国石油开发最早的油田之一,距今已有百年的勘探开发历史。近年来,随着地质工作的深入和油层改造工艺的进步,其特-超低渗、浅埋藏油层的储集特征与油气富集规律引起人们的广泛关注。本文对研究区域进行地质特征、构造特征、流体特征、储层特征和油藏特征分析,充分论证该区开发效果,提出超前注水、周期注水、振动驱油以及泡沫驱较为适用于该区域长6低渗透油藏。通过清洁压裂液效果评价及空气泡沫驱理论对比,结合周边井区空气泡沫驱工作经验,认为对长6低渗透油田进行泡沫驱油,能较大幅度提高原油采收率,将可能作为未来10年长6低渗透油藏改善开发效果的重要手段。
[Abstract]:The reserves of low permeability reservoirs account for more than 65% of the proven petroleum geological reserves in China. The low permeability reservoirs will be the main resource basis for increasing oil storage and production in China for a long time in the future. Due to the complex geological and percolation characteristics of low permeability oil and gas reservoirs, the low permeability reservoirs generally have low oil recovery and it is very difficult to develop. The underground geological conditions of low permeability reservoirs are generally characterized by low porosity and very low permeability reservoirs. The primary formation pressure is low and the energy supply is insufficient. The common characteristics in the development of low permeability reservoirs are low single well production and poor benefit. The Qilicun Oil production Plant of Yanchang Oilfield is one of the earliest oil fields developed in China, which has a history of exploration and development for a hundred years. In recent years, with the deepening of geological work and the progress of reservoir reconstruction technology, the reservoir characteristics and oil-gas enrichment law of ultra-low permeability and shallow buried reservoirs have attracted widespread attention. In this paper, geological characteristics, structural characteristics, fluid characteristics, reservoir characteristics and reservoir characteristics of the studied area are analyzed, the development effect of this area is fully demonstrated, and advanced water injection and periodic water injection are proposed. Vibration flooding and foam flooding are more suitable for Chang6 low permeability reservoirs in this area. By evaluating the effect of clean fracturing fluid and comparing the theory of air foam flooding, combined with the working experience of air foam flooding in the surrounding well area, it is considered that foam flooding in Chang6 low permeability oil field can greatly improve the oil recovery. It may be used as an important means to improve the development effect in 10 years and 6 years low permeability reservoirs in the future.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE348

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