蠡县斜坡低饱和度油藏测井评价方法研究

发布时间：2018-12-27 06:41

【摘要】：随着全球性油气勘探与开发工作的深化,低含油饱和度油气藏引起了广泛的重视。当前对低含油饱和度油气层的识别评价是测井处理解释领域中专家们普遍关注的难题。由于低饱和度油藏的测井响应特征复杂,给油水层的流体性质识别和产能评价带来了很多困难。为了提高测井解释符合率,针对该类油藏的评价难点,本论文以蠡县斜坡构造带低含油饱和度储层为研究对象,开展了蠡县斜坡低饱和度油藏的评价方法研究。通过进行蠡县斜坡低饱和度油气层的测井响应特征影响因素分析,在岩电、取心、压汞等实验数据的基础上,进行了储层四性关系研究,总结出研究区低含油饱和度油气层的形成与低油藏幅度、岩石颗粒细且粒径分布集中、高束缚水饱和度、低渗透率以及复杂孔隙结构等因素有关。在岩石物理分析的前提下,用能够反映储层特征的测井响应曲线建立了孔隙度、渗透率等储层参数定量解释模型。本文结合岩电实验数据和压汞实验数据,给出了阿尔奇公式法、Simandoux公式法和毛管压力法计算含水饱和度,在高阻段取阿尔奇公式法和毛管压力法所得含水饱和度的平均值,在低阻段取Simandoux公式和毛管压力法计算所得含水饱和度的平均值。在低含油饱和度流体性质评价和产能评价方面,结合油水层特征定性解释,以单井、多井、平面展布等多种形式,建立了基于钙质含量的流体识别方法,形成了以阵列感应、核磁共振测井为主导的油水层识别方法和产能评价方法,建立了阵列感应与孔隙结构相结合的产能评价标准。实际应用表明,本文给出的方法适用于蠡县斜坡低饱和度油藏测井评价,提高了测井解释精度。
[Abstract]:With the deepening of global oil and gas exploration and development, low oil saturation reservoirs have attracted extensive attention. At present, the identification and evaluation of oil and gas reservoirs with low oil saturation is a difficult problem that experts generally pay attention to in the field of log processing and interpretation. Because of the complex logging response characteristics of low saturation reservoirs, it is difficult to identify the fluid properties and evaluate the productivity of oil and water reservoirs. In order to improve the coincidence rate of log interpretation, aiming at the difficulty of evaluating this kind of reservoir, this paper takes the low oil saturation reservoir of Lixian slope structural belt as the research object, and develops the evaluation method of Lixian slope low saturation reservoir. On the basis of the experimental data of rock electricity, coring, mercury injection and other experimental data, the four properties of reservoir were studied by analyzing the factors affecting the logging response characteristics of low saturation oil and gas reservoirs on Lixian slope. It is concluded that the formation of oil and gas reservoirs with low oil saturation in the study area is related to the factors such as low reservoir amplitude, fine rock particle size distribution, high irreducible water saturation, low permeability and complex pore structure. On the premise of rock physical analysis, a quantitative interpretation model of reservoir parameters, such as porosity and permeability, is established by using logging response curve which can reflect reservoir characteristics. Based on the experimental data of rock electricity and mercury injection, this paper presents the calculation of water saturation by Archie formula method, Simandoux formula method and capillary pressure method, and the average value of water saturation obtained by using Archie formula method and capillary pressure method in high resistance section. Simandoux formula and capillary pressure method are used to calculate the average water saturation in the low resistance section. In the aspect of fluid property evaluation and productivity evaluation of low oil saturation, combined with qualitative interpretation of oil-water layer characteristics, a fluid identification method based on calcium content was established in many forms, such as single well, multi-well, plane distribution and so on, resulting in array induction. Nuclear magnetic resonance logging (NMR) is the dominant method for oil-water reservoir identification and productivity evaluation, and a productivity evaluation standard combining array induction and pore structure is established. The practical application shows that the method presented in this paper is suitable for logging evaluation of low saturation reservoirs on Lixian slope and improves the precision of log interpretation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13;P631.81

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