低渗油藏直井长缝压裂开发井网及注水优化设计

发布时间：2018-06-21 03:12

本文选题：低渗透油藏 + 井网适配　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：低渗透油藏普遍具有非达西渗流特点,注水开发效果不佳。目前主要采用大型压裂弹性开发、小井距注水、CO2驱和分段压裂水平井等技术。但由于地层条件、气源及工艺等方面的影响,开发效果不佳。直井长缝压裂注水开发为低渗透油藏的高效开发提供了新思路,但是目前对开发井网井距及注水参数的优化还略显不足,本文针对这些问题,开展井网井距及注采参数优化,对提高低渗透油藏的储层动用率和采收率具有重要的理论和实践意义。本文首先总结国内外低渗油藏井网部署及注水开发的研究的历史及现状,在实际油藏静态数据的基础上,不同渗透率范围下,综合使用油藏工程方法、数值模拟技术、统计学方法、经济学评价等方法,从注采井网井距、压裂参数、注水开发参数三方面进行优化设计。优选出了交错排状井网,三种渗透率下,最优排距170m、200m、300m,最优井距为500m,最优水井穿透比0.34、0.25、0.18,最优油井穿透比0.35、0.2、0.18,最佳裂缝导流能力分别为15~25、20~40、40~60μm2.cm,针对目标油藏,注水时机可为90%静水柱压力;合理注采压差24MPa,采液速度维持在2%,注采比应保持1.0。
[Abstract]:Low permeability reservoirs are generally characterized by non-Darcy percolation and poor water injection development. At present, the technologies of large scale fracturing elastic development, small well spacing water injection CO 2 drive and segmental fracturing horizontal well are mainly used. However, due to the influence of formation conditions, gas source and technology, the development effect is not good. The development of long fracture fracturing in straight wells provides a new idea for the efficient development of low permeability reservoirs, but at present the optimization of well spacing and injection parameters is still slightly inadequate. In view of these problems, this paper develops the optimization of well spacing and injection-production parameters. It has important theoretical and practical significance for improving reservoir productivity and oil recovery in low permeability reservoirs. This paper first summarizes the history and present situation of well pattern deployment and water injection development in low permeability reservoirs at home and abroad. On the basis of static reservoir data, the reservoir engineering methods and numerical simulation techniques are comprehensively used in different permeability range. The optimization design of injection-production well spacing, fracturing parameters and water injection development parameters is carried out by means of statistical method and economic evaluation. The staggered well pattern is selected. Under the three kinds of permeability, the optimal spacing is 170 m ~ 200 m ~ 3 m, the optimum well spacing is 500 m, the optimum well penetration ratio is 0.34 ~ 0.25 ~ 0.18, the optimum well penetration ratio is 0.35 ~ (0.2) ~ 0.18, the optimum fracture conductivity is 152520 ~ 40 ~ 40 ~ 4060 渭 m ~ 2 路cm ~ 2 路cm, and the water injection time can be 90% static water column pressure for the target reservoir. The reasonable pressure difference between injection and production is 24MPa, the velocity of liquid production is 2 and the ratio of injection to production should be kept at 1.0.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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