CAJ | 학술논문

第I部分[1]提出了一个两相流-岩层流固耦合模型，为了应用该模型对超临界二氧化碳注入过程中岩层力学响应和流体运移进行评估，采用Comsol商业程序，提出了相应的数值分析方法。给出了模型参数的确定方法，并采用室内试验数据对模型进行了验证；通过现场的温度和压力条件以及岩层的Van Genuchten参数，确定了二氧化碳的密度和黏度。基于三轴压缩试验、有效应力系数试验和渗透性试验，对力学模型及耦合关系中的参数进行了验证。最后给出一个应用实例，该岩层位于地下680～700 m深度，宽度为100 m，分析了不同二氧化碳注入速率下注入压力的演化规律，得到了岩层中孔隙压力、竖向应变和损伤变量的分布，并对二氧化碳的运移规律也进行了分析。研究结果为超临界二氧化碳注入过程中岩层力学响应和流体运移的评估提供了理论基础。
제I부분[1]제출료일개량상류-암층류고우합모형，위료응용해모형대초림계이양화탄주입과정중암층역학향응화류체운이진행평고，채용Comsol상업정서，제출료상응적수치분석방법。급출료모형삼수적학정방법，병채용실내시험수거대모형진행료험증；통과현장적온도화압력조건이급암층적Van Genuchten삼수，학정료이양화탄적밀도화점도。기우삼축압축시험、유효응력계수시험화삼투성시험，대역학모형급우합관계중적삼수진행료험증。최후급출일개응용실례，해암층위우지하680～700 m심도，관도위100 m，분석료불동이양화탄주입속솔하주입압력적연화규률，득도료암층중공극압력、수향응변화손상변량적분포，병대이양화탄적운이규률야진행료분석。연구결과위초림계이양화탄주입과정중암층역학향응화류체운이적평고제공료이론기출。
The first part proposed a two-phase flow-reservoir coupling model, in order to apply this model to evaluate the stability of reservoir and fluid transportation, the commercial algorithm, Comsol Multiphysics, is used and the corresponding numerical modeling method is proposed. The determination procedure of model parameters is firstly presented and the simulation results are validated by the laboratory tests. The density and viscosity of CO2 are determined according to the in situ condition of temperature and pressure, the Van Genuchten parameters of rock layer are from the literature. Based on the triaxial compression tests, effective stress coefficient tests and permeability tests, the model parameters involved in mechanical model and coupling relations are identified. We then perform a case study. The rock layer is situated at depth between 680 to 700 m, and the width is 100 m. The evolution of injection pressure under different injection rates is studied, the distributions of pore pressure, vertical strain and damage variable are presented;the CO2 transportation is also analyzed. The present work offers theoretical basis for evaluating the stability of reservoir and fluid transportation.