碳酸盐岩储层自生酸基质酸化模拟研究

发布时间：2018-04-24 17:51

本文选题：碳酸盐岩 + 自生酸　；参考：《西南石油大学》2015年硕士论文

【摘要】：基质酸化是解除污染、恢复产能的重要增产措施。现场实践结果表明,常规酸化对高温储层酸化不能达到要求,自生酸酸化克服了常规酸化的弱点,满足了施工要求,其化作为储层酸化的常用手段之一,在很多施工条件下表现优于常规酸化。然而用自生酸对碳酸岩储层的酸化改造存在以下问题：自生酸酸化施工中缺乏模拟手段,缺少优化施工参数的方法,难以达到最优酸化效果。由于自生酸本身的特殊性,建立适当的模型对其施工进行模拟较为困难。本文针对自生酸酸化特点,对自生酸酸化过程进行模拟,预测酸化效果,为施工提供理论指导,主要着眼于碳酸盐岩自生酸基质酸化合理注酸问题,开展了以下工作： (1)通过实验测定了某类自生酸体系的酸液生成速度、测定了其酸岩反应动力学常数,明确了自生酸的缓蚀、缓速性能,为模型建立提供理论支持。 (2)将伤害带划分为独立单元进行伤害模拟分析,应用平面径向渗流理论,耦合非均匀伤害模型和泥饼形成模型,综合考虑储层非均质性和施工参数沿变化,建立了描述伤害程度和形态分布的非均匀伤害模型。 (3)将碳酸盐岩储层基质酸化模型和自生酸等效模型结合,建立了能够描述碳酸盐岩储层自生酸基质酸化的系统模型。通过对不同参数进行对比分析,为自生酸酸化施工提供理论指导。 (4)建立了一套针对自生酸碳酸盐岩储层基质酸化优化方法,包括酸液性能评价、非均匀伤害模拟、自生酸酸化过程模拟、施工参数优化,可用于自生酸基质酸化方案。通过本论文的研究,形成了一套包含：实验室内评价、储层伤害模拟、酸化设计模拟、酸化后效果评估这几个方面的较为完整的系统,其适用于碳酸盐岩储层自生酸基质酸化,实现了理论与实际的结合。
[Abstract]:Substrate acidification is an important measure to remove pollution and restore production capacity. The field practice results show that conventional acidification can not meet the requirements for acidification of high temperature reservoirs, and the acidation of autogenous acid can overcome the weakness of conventional acidification and meet the construction requirements, which is one of the common methods of reservoir acidification. In many construction conditions, performance is superior to conventional acidification. However, the following problems exist in the acidizing modification of carbonate reservoir with autogenous acid: the lack of simulation means in acidation construction and the lack of methods to optimize construction parameters are difficult to achieve optimal acidizing effect. Due to the particularity of autogenic acid itself, it is difficult to establish appropriate model to simulate its construction. In view of the characteristics of acidation, this paper simulates the process of acidation, predicts the effect of acidification, provides theoretical guidance for construction, mainly focuses on the rational injection of acid into carbonate acid matrix, and carries out the following work: 1) the acid formation rate of a kind of autogenic acid system was measured experimentally, the kinetic constants of acid rock reaction were determined, and the inhibition and inhibitive properties of the autogenous acid were determined, which provided theoretical support for the establishment of the model. (2) the damage zone is divided into independent units for damage simulation and analysis. The theory of plane radial percolation is applied to coupling the non-uniform damage model and the mud cake formation model, and the reservoir heterogeneity and construction parameters are considered along the variation. A non-uniform injury model was established to describe the degree and shape distribution of injury. 3) combining the acidification model of carbonate reservoir matrix with the equivalent model of authigenic acid, a systematic model which can describe the acidification of carbonate reservoir is established. Through the comparison and analysis of different parameters, it provides theoretical guidance for the construction of acidation. (4) A set of optimization methods for matrix acidizing in carbonate reservoirs of authigenic acid are established, including acid performance evaluation, non-uniform damage simulation, acidation process simulation and construction parameter optimization, which can be used for acidogenic acid matrix acidification scheme. Through the research of this paper, a set of relatively complete systems including laboratory evaluation, reservoir damage simulation, acidizing design simulation and effect evaluation after acidizing are formed, which are suitable for acidification of carbonate reservoir autogenic acid matrix. The combination of theory and practice is realized.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.2

【参考文献】