扶余油田西二区块剩余油分布规律及细分层注水实践

发布时间：2018-12-30 10:35

【摘要】：扶余油田油藏历经多年注水开发,剩余油分布更趋复杂,油田含水上升较快,老油井产量递减加快,稳产难度加大,大部分采油井综合含水达到90%以上。虽然含水很高,但是采出程度只有31.2%,根据近几年的测井资料显示主力油层仍有28.2%未水洗,开发剩余油已经是摆在我们面前的重要问题。本文通过收集大量的原始资料以及对国内外文献资料调研的基础上,借鉴前人对扶余油田西二区块地质特征的研究成果和认识,以密闭取心检查井的实际观察和检测分析为出发点,并结合测井资料分析,研究了西二区块剩余油的空间分布规律。此外,为了检验研究成果,对油层进行深度挖潜,我们选取了西16-9区块作为细分注水试验区,进行了水井细分层和注水实践。论文的研究结果表明,油田单井含水达90%以上的高含水期后,剩余油饱和度还有50%左右;油层的物性及非均质性决定了储层的水淹规律和剩余油分布;人工作用对水淹状况有很大影响,可造成平面非均质;目前剩余油主要分布在主河道、相对高渗透的弱中水淹段中;剩余油在平面上的分布情况主要有5种;研究成果用于西16-9试验区块细分层注水实践,取得了良好的实施效果。
[Abstract]:After many years of waterflooding, the remaining oil distribution in Fuyu Oilfield is more complicated, the water cut in oil field is rising rapidly, the production of old oil well is decreasing, the difficulty of stabilizing production is increasing, and the comprehensive water cut of most production wells has reached more than 90%. Although the water cut is very high, the degree of recovery is only 31.2%. According to the logging data in recent years, 28.2% of the main reservoir is still unwashed, and the development of remaining oil is an important problem in front of us. On the basis of collecting a large amount of original data and investigating the literature at home and abroad, this paper draws lessons from the previous research results and understandings on the geological characteristics of West No.2 Block in Fuyu Oilfield. Based on the practical observation and detection analysis of closed coring inspection well and the analysis of logging data, the spatial distribution of remaining oil in Xier Block is studied. In addition, in order to test the research results, we select West 16-9 block as the subdivision water injection test area, and carry out well subdivision and water injection practice. The research results show that the remaining oil saturation is about 50% after the high water cut period of more than 90% water cut in single well, and the reservoir physical property and heterogeneity determine the water flooding rule and remaining oil distribution. At present, the remaining oil is mainly distributed in the main channel, relatively high permeability in the weak middle flooded section, and there are 5 kinds of remaining oil in the plane. The research results have been applied to the practice of water injection in the subdivision zone of West 16-9 experimental area, and good results have been obtained.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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