强边水油藏水侵规律研究

Study on Water Flooding Law of Strong Edge Water Oil Reservoir

摘要: 边底水油藏的水侵规律受水体体积、渗透率级差、地层倾角、产液速度、边水与生产井的距离等因素的影响，不同的储层地质特征与开发方式均会对油藏的最终采收率造成重大影响，因此明确不同因素对强边水油藏的水侵规律影响，是合理高效开发边水油藏的基础前提。本文利用数值模拟方法，以含水上升规律以及采出程度作为指标，确定影响边水油藏水侵的主力因素为地层倾角、边水和生产井的距离以及渗透率级差，主力因素显著性排序为：生产井与边水的距离 > 地层倾角 > 渗透率级差。研究成果是合理高效开发边水油藏的基础前提。

Abstract: The water flooding law of the edge water oil reservoir is affected by factors such as the volume of the water body, permeability gradient, inclination of the strata, production rate, and the distance between the edge water and the production well. The final recovery rate of the reservoir will be greatly affected by different geological characteristics and development methods of the reservoir, therefore, it is a fundamental prerequisite for the rational and efficient development of the edge water oil reservoir to clarify the influence of different factors on the water flooding law of the strong edge water oil reservoir. In this paper, the authors use numerical simulation methods to determine that the main factors affecting the water flooding of edge water oil reservoirs are the inclination of the strata, the distance between the edge water and the production well, and the permeability gradient, by taking the rising water content law and the degree of recovery as the indexes, with the main factors being ranked in order of significance: the distance between the production well and the edge water > the inclination of the strata > the permeability gradient. The research findings are a fundamental prerequisite for the rational and efficient development of edge water oil reservoirs.