【作者】 唐守琴；

【导师】 李鹏举；

【作者基本信息】 大庆石油学院 ， 地球探测与信息技术， 2008， 硕士

【摘要】 储层润湿性和相渗透率是影响油田开发和油层水淹程度的重要因素,对油田开发、综合管理和改造起着重要的作用。储层相渗透率、润湿性测井评价一直是国内外应用地球物理研究领域的主要攻关课题之一,科技人员在一些方面取得了进展,但研究成果大部分是在实验室通过岩心分析获得的,目前还没有一种具有良好适应性的评价模型广泛应用于现场解释。当前提高油田采收率所面临的最重要的问题之一就是提高油藏动静态描述水平,建立精细地质模型,准确判断油层水淹状况和认识剩余油的分布特征。储层参数,特别是渗透率的解释精度是进行油藏描述和剩余油定量计算的关键。因此,探索新的测井评价方法准确判断油层润湿性和更精确地计算渗透率,对油田的勘探开发具有十分重要的意义。本文首先从油层润湿性和相渗透率研究的油层物理基础出发,分析了低渗透储层的岩性特征和物性特征,列举了油层润湿性的确定方法和研究现状,给出了现有的毛管压力曲线的测定方法及其应用;相对渗透率曲线的测定方法及相对渗透率曲线的应用,通过分析比较认为:现有的测井评价油藏润湿性的方法多以定性判断为主,并且存在一定的局限性,很难在油藏润湿性评价中发挥更大的作用。目前,应用核磁共振松弛时间定量评价油藏润湿性的岩心分析方法已经比较成熟,应用复电阻率频散、介电测量与润湿性关系的实验室研究已经显示了较好的应用前景,单独或者综合利用核磁测井、复电阻率测井和介电测井连续、定量地评价油藏润湿性将是很有意义的研究方向。本文在电阻率测井方法、电测井辅助RFT地层测试等定性识别油藏润湿性和相渗透率的方法的基础上,从岩石储层孔隙结构、润湿性和油层渗流机理出发,分析和确定了储层润湿性和相渗透率测井评价方法,建立了油层润湿性和相渗透率的测井评价模型,依此开发了基于测井资料的储层润湿性和相渗透率解释与计算软件,并应用该软件对宋芳屯油田北部区块实际资料进行了处理,解释结果是令人满意的。更多还原

【Abstract】 Reservoir wettability and phase permeability, which are important factors that affect oilfield development and oil-bearing sand watered degree, play an important role in the development, the integrated management and stimulation of the oilfield.The reservoir phase permeability and wettability logging evaluation is still one of the major research tasks in the geophysical research field both at home and abroad. Progress in some areas has been made by science and technology personnel, but most of the research results are gained merely through core analysis in the laboratory, so there is’t a good evaluation model that can be widely used in the practical interpretation now.At present, one of the most important problems that must be faced to enhance oil recovery ratio is to improve reservoir static and dynamic description level, to establish elaborate geology describing model, to estimate oil-bearing sand watered degree accurately and to identify the distribution of the remaining oil.Reservoir parameters, in particular the interpretation accuracy of the permeability is the key element to reservoir description and residual oil quantitative calculation.Therefore, it is important to the exploration and development of oil field to develop new logging evaluation methods to judge reservoir wettability accurately and calculate permeability with higher accuracy.In this paper, we first analyzed lithology character and physical character of the low-permeability reservoir on the basis of reservoir physics of the research of reservoir wettability and phase permeability, then enumerated the determing methods and the research situation of reservoir wettability and we presented the measuring method and application of the existing capillary pressure curve and the measuring method and application of the relative permeability curve.Through analysis and comparison we can draw a conclusion: most of the existing logging evaluation methods of reservoir wettability are mainly qualitative evaluations, and there are some limitations to them, so it is very difficult for them to be widely uesd in the wettability evaluation of reservoir.At present, the core analysis methods of applying nuclear magnetic resonance relaxation time to evaluate wettability of reservoir quantitatively have been relatively well developed, the laboratory studies by applying the relation between complex resistance frequency dissemination、dielectric measurements and wettability have indicated a better applying prospect. Evaluating wettability of reservoir continuously and quantitatively by using nuclear magnetic resonance logging, complex resistivity logging and dielectric logging information both alone and combined will be the very meaningful trend of research.更多还原