碳酸盐岩多重介质储层单井Transient产量递减分析方法研究

发布时间：2018-02-26 16:25

本文关键词： 碳酸盐岩多重介质 Transient递减渗流模型样版曲线　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：现代产量递减分析方法是进行油气田动态监测的技术手段之一,已越来越受到关注。目前现代产量递减分析方法的研究大都以Blasingame等方法为主,然而这些方法都是基于边界控制流基础之上的,对于处于不稳定流动阶段的数据很难进行拟合解释或解释的早期参数不够准确。与常规砂岩储层不同,碳酸盐岩油气藏投产即递减,没有稳产,地层中的流动大多时间处于不稳定流动阶段,很难出现稳定流或拟稳定流阶段,对于这种阶段的数据分析,各种已有的产量递减分析方法均无法适用。本文针对碳酸盐岩多重介质油气藏,研究了 Transient产量递减分析方法,能够更加准确地拟合解释不稳定流动阶段的数据,突破了 Blasingame等产量递减分析方法的局限性。本文完成的主要内容概括起来主要包括以下几方面:(1)针对裂缝型双重介质储层,研究获得了基于有效井径的双孔单渗、双孔双渗Transient产量递减模型,绘制了相应的理论样版曲线,着重分析了裂缝储容系数、基质向裂缝窜流系数、外边界半径、表皮系数等参数对样版曲线的影响;(2)针对缝洞型三重介质储层,研究获得了基于有效井径的三孔单渗、三孔双渗Transient产量递减模型,绘制了相应的理论样版曲线,着重分析了基质储容系数、溶洞储容系数、基质向裂缝窜流系数、溶洞向裂缝窜流系数等参数对样版曲线的影响;(3)针对裂缝型两区复合储层,研究获得了基于有效井径的一区为双重、外区为均质的双重-均质以及一区为双重、外区为双重的双重-双重两区复合储层单井Transient产量递减模型,绘制了相应的理论样版曲线,着重研究了外区与内区渗透率之比、内区与外区导压系数之比以及内区半径等参数对样版曲线的影响;(4)针对缝洞型两区复合储层,研究获得了基于有效井径的一区为三重、外区为均质的三重-均质以及一区为三重、外区为双重的三重-双重两区复合储层单井Transient产量递减模型,绘制了相应的理论样版曲线,着重研究了外区与内区渗透率之比、内区与外区导压系数之比以及内区半径等参数对样版曲线的影响;(5)实例分析,运用研究的Transient产量递减模型样版曲线进行现场实测井解释,获得了有用的储层参数,并将解释结果与试井解释结果以及Blasingame解释结果进行了比较。
[Abstract]:The modern production decline analysis method is one of the technical means of oil and gas field dynamic monitoring, and has been paid more and more attention. At present, the research of modern production decline analysis method is mainly based on Blasingame and other methods. However, these methods are based on the boundary control flow and are not accurate enough for the early parameters which are difficult to fit and interpret for the data in the unstable flow stage, which are different from the conventional sandstone reservoirs. The carbonate reservoir goes into production decreasing, without stable production, the flow in the formation is mostly in the unstable flow stage, it is very difficult to appear stable flow or quasi-stable flow stage, for the data analysis of this stage, All the existing production decline analysis methods can not be applied. In this paper, the Transient production decline analysis method is studied for carbonate multi-medium reservoirs, which can more accurately fit and interpret the data of unstable flow stage. The main contents of this paper are summarized as follows: in view of fractured duplex medium reservoir, double porosity and single permeability based on effective well diameter are obtained, the main contents of this paper are summarized as follows: (1) the main contents of this paper are summarized as follows: (1) the main contents of this paper are summarized as follows: 1. The production decline model of Transient with double porosity and double permeability has been drawn, the corresponding theoretical model curve has been drawn, and the fracture storage coefficient, matrix channeling coefficient and outer boundary radius have been analyzed emphatically. The effect of parameters such as epidermis coefficient on the sample plate curve A model of Transient production decline based on effective well diameter is obtained and the corresponding theoretical pattern curve is drawn for the reservoir with fracture-cavity type triple medium. The influence of the parameters such as matrix storage coefficient, cavern storage coefficient, matrix channeling coefficient to fracture flow coefficient and cavern channeling coefficient towards fracture on the model curve is analyzed emphatically, which is aimed at the fractured two-zone composite reservoir. In this paper, the model of Transient production decline of single well in one area based on effective well diameter, in which the outer area is homogeneous, the first area is dual and the outer area is double, is obtained, and the corresponding theoretical pattern curves are drawn. In this paper, the effects of the permeability ratio of outer and inner zones, the ratio of pressure conductivity coefficient of inner and outer areas and the radius of inner zone on the pattern curve are studied emphatically. (4) in view of the fracture-cavity type two-zone composite reservoir, it is obtained that the area based on effective well diameter is triple. The Transient production decline model of single well in the outer area is homogeneous, the first area is triple and the outer area is double. The corresponding theoretical pattern curve is drawn, and the permeability ratio between the outer and inner areas is studied emphatically. Analysis of the effect of parameters such as the ratio of the pressure conductivity coefficient and the radius of the inner zone on the sample curve by using the model of Transient production decline in situ, the useful reservoir parameters are obtained. The interpretation results are compared with well test results and Blasingame interpretation results.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE328

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