砂岩储层伤害机理及模拟模型研究

发布时间：2018-06-01 04:16

本文选题：储层伤害 + 钻井液　；参考：《西南石油大学》2015年硕士论文

【摘要】：储层伤害是指从打开储层开始,至原油开采的过程中,由于人为因素造成的油井产能下降,甚至于丧失产能的现象。它发生在对地下油气储层的开采过程中,包括采油、钻井、水力压裂、修井等各个阶段。因此,为了有效的对储层中的油气进行开采,有必要对储层伤害进行评价,选取、建立合适的实验分析方法、数学模型和模拟技术来了解、评价、诊断、治理、控制和预防储层伤害问题。本文着眼于砂岩储层钻井液伤害、黏土水化膨胀伤害、微粒运移伤害以及无机结垢伤害,主要开展了以下工作： (1)在钻井液伤害机理分析的基础上,建立了泥饼模型、伤害半径模型、伤害渗透率模型,结合Furui水平井表皮系数模型,可以求解出钻井液对非均匀储层水平井的伤害程度以及伤害范围； (2)在黏土水化膨胀机理分析的基础上,利用临界盐度方程,结合黏土水化膨胀渗透率伤害方程,可判断水化膨胀伤害程度； (3)在微粒运移机理分析的基础上,建立了微粒运移模型,通过讨论单个微粒的受力,建立起微粒的受力平衡方程,推导出了滞留微粒、堵塞微粒以及悬浮微粒的连续性方程。利用这些模型,可求解出储层内不同时间、不同位置处的微粒浓度。引入Carman-Kozeny水利管模型以及Civan渗透率下降模型,可求解出微粒运移对储层渗透率造成的伤害； (4)从无机垢的形成过程以及影响无机沉淀形成的因素两个方面阐述无机垢伤害机理。利用Oddo-Tomson修正饱和指数法,结合碳酸钙最大结垢量预测方程、结垢半径方程和渗透率下降模型,可模拟碳酸钙结垢对储层的伤害； (5)针对国外某油田M井,进行实例分析,模拟不同类型伤害对M井的伤害程度并利用油藏数值模拟的方法,模拟对比了M井伤害前后的产能。
[Abstract]:Reservoir damage refers to the decline or even loss of production capacity caused by human factors during the process of opening up the reservoir and producing crude oil. It occurs in the production of underground oil and gas reservoir, including oil recovery, drilling, hydraulic fracturing, workover and other stages. Therefore, in order to effectively exploit the oil and gas in the reservoir, it is necessary to evaluate, select, establish appropriate experimental analysis methods, mathematical models and simulation techniques to understand, evaluate, diagnose and manage the reservoir damage. Control and prevention of reservoir damage. This paper focuses on the damage of sandstone reservoir drilling fluid, clay hydration expansion injury, particle migration injury and inorganic scaling injury. The main work is as follows: 1) based on the analysis of the damage mechanism of drilling fluid, the mud cake model, damage radius model, damage permeability model and Furui horizontal well skin coefficient model are established. The damage degree and damage range of drilling fluid to horizontal wells in non-uniform reservoir can be calculated. 2) on the basis of the analysis of hydration expansion mechanism of clay, the damage degree of hydration expansion can be judged by using the critical salinity equation and the damage equation of hydration expansion permeability of clay. 3) based on the analysis of particle migration mechanism, a particle migration model is established. By discussing the force of a single particle, the equilibrium equation of the particle force is established, and the continuity equations of the retained particle, the blocked particle and the suspended particle are derived. By using these models, the particle concentration at different time and position in the reservoir can be calculated. The damage caused by particle migration on reservoir permeability can be solved by introducing Carman-Kozeny hydraulic pipe model and Civan permeability decreasing model. 4) the damage mechanism of inorganic scale is expounded from two aspects: the formation process of inorganic scale and the factors affecting the formation of inorganic precipitate. The damage of calcium carbonate scaling to reservoir can be simulated by Oddo-Tomson modified saturation index method combined with the prediction equation of the maximum scaling amount of calcium carbonate the scaling radius equation and the permeability decreasing model. 5) aiming at M well in a foreign oil field, an example analysis is carried out to simulate the damage degree of different types of damage to M well and to simulate and contrast the productivity of M well before and after injury by using reservoir numerical simulation method.
【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】：TE258

【参考文献】