基于RPM测井剩余油饱和度解释方法研究

发布时间：2018-03-29 21:01

本文选题：RPM测井剩余油饱和度　切入点：影响因素校正　出处：《长江大学》2015年硕士论文

【摘要】：油田投入生产之后,其产量会随着地层含油饱和度的变化而变化,油、气的产量将减小,水的产量将大幅上升。实时准确地了解地层的动态变化情况,监测地层的含油饱和度,采用测井分析的方法来认识和评价地层的水淹程度,对指导油田后期合理高效开发、提高储层采收率有着重要意义,这就需要剩余油饱和度参数作为依据。很多裸眼井中的测井方法由于受到了套管的物理特性的限制,在套管井的地层评价中并不适用。目前套管井中使用的较多的饱和度测井方法均是以核物理理论为基础的,如：碳氧比(C/O)能谱测井、PNN测井、中子寿命测井(TDT)、PND测井、硼中子测井等。本文基于RPM测井方法,以L油田剩余油评价为研究对象,对RPM测井解释中存在的部分问题进行论述分析,然后建立剩余油饱和度计算模型,对研究区块展开剩余油水淹状况评价,最后将研究成果以软件的形式实现,对实例井进行解释处理验证。储层性能监测仪RPM (Reservior Performance Monitor)是Atlas公司生产的一种新型的1.7in的多探头、多功能的脉冲中子测井仪,可以在油管或套管的生产井内测量,而且也可以与生产测井仪(PLT)组合使用。碳氧比测井的主要优点是能穿透套管、水泥环而直接测量地层中的元素,不受地层水矿化度的影响,在地层水矿化度和注入水差别较大时,该方法有着突出的优点,尤其是在对高孔隙度地层进行测试中有着较好的应用效果,其克服了电法测井目前不能用于评价套管井中储集层饱和度的困难,又弥补了中子寿命测井不能用于低地层水矿化度区域的不足。它能直接反应地层中某些特征元素的含量,提供地层的物性、岩性、油性和有效厚度等信息,还可以提供地下气、油、水的动态,产能、剩余油饱和度、采油指数等参数。而L油田地层矿化度为35000ppm,地层孔隙度在25%～35%之间,因此L油田主要采用碳氧比能谱测井进行测量。本文旨在从RPM测井过程进行分析,对RPM测井仪在研究区块的适应性进行评价,建立一套适合研究区块的测井曲线质量评价标准,并对RPM测井过程中受到的一系列环境影响因素,如：孔隙度、地层含油饱和度、环空流体、砾石充填等展开分析,提出环空流体、泥质含量和砾石充填的校正方法,并针对研究区块实际情况确定了RPM测井的主控影响因素,建立了合适的解释模型。在剩余油饱和度评价和水淹层识别部分,结合国内外油田水淹层级别划分标准,建立了适合研究区块的水淹层级别划分标准。同时结合裸眼井资料和地质资料,采用动静态相结合的方法进行水淹级别的判定,有效地提升了水淹层评价的准确性。最后,基于RPM测井资料解释,编制了适合研究区块的RPM测井解释模块,使本文所提出的模型方法以软件的形式得以实现,并通过实例井进行验证,认为本文的研究方法具有一定的推广价值。
[Abstract]:After the oil field is put into production, its production will change with the change of oil saturation, the production of oil and gas will decrease, and the production of water will increase substantially. It is of great significance to recognize and evaluate the water-flooded degree of formation by using the method of log analysis to guide the rational and efficient development of oil field in the later stage and to improve the reservoir recovery. This requires the parameters of residual oil saturation as the basis. Many logging methods in open hole wells are limited by the physical characteristics of the casing. At present, many saturation logging methods used in casing wells are based on nuclear physics theory, such as C / O energy spectrum logging PNN logging, neutron life logging TDTT / PND logging, etc. Boron neutron logging and so on. Based on RPM logging method, this paper discusses and analyzes some problems existing in the interpretation of residual oil in L oilfield by taking the evaluation of remaining oil in L oilfield as the research object, and then establishes the calculation model of residual oil saturation. In the end, the research results are realized in the form of software to verify the interpretation and processing of the sample wells. The reservoir performance monitor, RPM Reservior Performance Monitor, is a new type of 1.7in multiprobe produced by Atlas Company. The multifunctional pulsed neutron logging tool can be used in production wells of tubing or casing, and can also be used in combination with production logging tool (PLT). The main advantage of carbon-oxygen ratio logging is that it can directly measure elements in formation through casing, cement ring and so on. Without the influence of formation water salinity, when the difference between formation water salinity and injected water is large, this method has outstanding advantages, especially in the test of high porosity formation has a better application effect. It overcomes the difficulty that electric logging can not be used to evaluate reservoir saturation in casing wells at present, and makes up for the deficiency of neutron lifetime logging which can not be used in low formation water mineralization area. It can directly reflect the content of some characteristic elements in formation. To provide information on physical properties, lithology, oil properties and effective thickness of the formation, we can also provide parameters such as the dynamics of underground gas, oil and water, productivity, residual oil saturation, oil recovery index, etc. The formation salinity of L Oilfield is 35000 ppm, and the formation porosity is between 25% and 35%. This paper aims to analyze the RPM logging process, evaluate the adaptability of the RPM logging tool in the study block, and establish a set of logging curve quality evaluation standards suitable for the study block. A series of environmental factors, such as porosity, oil saturation, annular fluid, gravel filling and so on, are analyzed during RPM logging, and the correction methods of annular fluid, mud content and gravel filling are proposed. According to the actual situation of the study block, the main control factors of RPM logging are determined, and an appropriate interpretation model is established. In the part of remaining oil saturation evaluation and water flooded zone identification, combined with the classification standard of water flooded zone at home and abroad, The criteria for the classification of water-flooded zones suitable for study blocks are established. Combining with the open-hole data and geological data, the method of dynamic and static combination is used to determine the water-flooded level, which effectively improves the accuracy of water-flooded zone evaluation. Based on the interpretation of RPM logging data, a RPM log interpretation module suitable for the study block is developed, which makes the model method proposed in this paper realized in the form of software, and verified by the example well. It is believed that the research method in this paper is worth popularizing.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.81;P618.13

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