储层注气引起地表变形的全场建模与分析
发布时间：2018-11-18 15:11
【摘要】：全球范围内化石能源的大规模开发利用,造成二氧化碳排放量的大幅度增加,地球大气层中二氧化碳浓度的升高开始影响自然生态系统,对人类的生存和发展构成危害。二氧化碳地质封存作为一项减少二氧化碳净排放量的极具潜力的技术措施,受到国内外广泛的关注。储层注气工程区别于普通的岩土工程,具有深埋、隐蔽的特点,且一旦封闭失效,形成渗漏途径,轻则浪费资源能源,重则危害环境,伤及人畜性命,因此,对储层动态的(reservoir behavior)监控和预测尤为重要。模拟和分析储层注气引起的地表变形,可用于储层工程灾害预测、指导设计监测岩层变形的倾斜仪安置阵列、校准现有地质模型等,是有效监测地表变形、实施施工过程历史拟合、反演与预测深部储层动态的基础。为对储层注气工程引起地表变形的全场建模分析提供可行的方法和思路,共做出如下方面的成果：(1)通过阅读和分析国内外相关学者的文献著作,综述了国内外二氧化碳埋存研究的发展现状及未来研究趋势,总结了储层工程远场岩石力学效应研究领域的研究内容,亟待解决的问题和存在的难点。(2)将储层注气引起地表变形这一深部储层在初始地应力场约束下由注气过程引起近远场二次弹性力学效应问题抽象简化为概念模型、全场二维模型或全场三维模型,逐渐增加简化模型对实际工程问题的近似能力,利用解析解推导,边界元程序求解、FLAC-3D软件模拟等手段,得到针对这一问题的系统的全场建模分析的结果及规律。为建立该类问题实际工程尺度的全场建模分析方法奠定了基础。(3)针对储层注气引起地表变形的全场建模和分析问题的特点,自主研发了用户可控的大规模网格化离散源程序。运行该程序即可将Eclipse储层模型自动转换并延伸成FLAC3D全场地质模型,将Eclipse储层流动分析结果转换使其为FLAC3D岩石力学分析所用,从而实现复杂地质结构储层流动与近远场岩石力学效应的单向耦合。(4)基于自主研发的源程序,模拟了某大型咸水层二氧化碳封存项目注气一定时间后的地表变形。研究了常规模拟流程遇到的逼近能力局限性等特殊问题,揭示了其原因并给出了解决方案。探讨了全场地质模型中包含的储层下覆岩层的厚度,即深度方向建模范围,对地表变形模拟精度的影响。
[Abstract]:The large-scale exploitation and utilization of fossil energy in the world has caused a large increase in carbon dioxide emissions, and the increase of carbon dioxide concentration in the earth's atmosphere has begun to affect the natural ecosystem, which is harmful to the survival and development of human beings. Geological sequestration of carbon dioxide, as a potential technical measure to reduce net carbon dioxide emissions, has attracted wide attention at home and abroad. Reservoir gas injection engineering is different from ordinary geotechnical engineering. It has the characteristics of deep burial and concealment, and once the seal fails, it forms a leakage path, which wastes resources and energy resources, harms the environment and endangers human and animal lives. (reservoir behavior) monitoring and prediction of reservoir performance is particularly important. Simulation and analysis of surface deformation caused by gas injection can be used to predict reservoir engineering disasters, guide the design of tiltmeter array for monitoring rock deformation, calibrate existing geological models, etc., are effective in monitoring surface deformation. The foundation of inversion and prediction of deep reservoir dynamic is carried out by historical fitting of construction process. In order to provide feasible methods and ideas for full-field modeling and analysis of surface deformation caused by reservoir gas injection engineering, the following achievements have been made: (1) by reading and analyzing the literature works of domestic and foreign scholars, The present situation and future research trend of carbon dioxide sequestration at home and abroad are summarized, and the research contents in the field of far-field rock mechanics effect of reservoir engineering are summarized. (2) Abstract the concept model of the deep reservoir under the constraint of initial in-situ stress field, which is caused by the gas injection process to cause the near far-field secondary elastic effect. The approximate ability of the simplified model to the practical engineering problems is gradually increased by using the full-field two-dimensional model or the full-field three-dimensional model, using analytical solution derivation, boundary element program solving, FLAC-3D software simulation and so on. The results and rules of full-field modeling and analysis for this problem are obtained. It lays a foundation for the establishment of full-field modeling and analysis method for the practical engineering scale of this kind of problems. (3) aiming at the characteristics of full-field modeling and analysis of surface deformation caused by gas injection, A large scale gridded discrete source program is developed. The Eclipse reservoir model can be automatically transformed into a FLAC3D full-field geological model by running the program, and the result of Eclipse reservoir flow analysis can be converted to be used in FLAC3D rock mechanics analysis. Thus the unidirectional coupling of reservoir flow and near-far-field rock mechanics effect is realized. (4) based on the self-developed source program, the surface deformation of a large salt water layer carbon dioxide sequestration project after injecting gas for a certain time is simulated. This paper studies some special problems such as the limitation of approximation ability encountered by the conventional simulation process, reveals the reasons and gives the solutions. This paper discusses the influence of the thickness of overlying strata in the full-field geological model, that is, the depth direction modeling range, on the accuracy of surface deformation simulation.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.7
本文编号：2340390
[Abstract]:The large-scale exploitation and utilization of fossil energy in the world has caused a large increase in carbon dioxide emissions, and the increase of carbon dioxide concentration in the earth's atmosphere has begun to affect the natural ecosystem, which is harmful to the survival and development of human beings. Geological sequestration of carbon dioxide, as a potential technical measure to reduce net carbon dioxide emissions, has attracted wide attention at home and abroad. Reservoir gas injection engineering is different from ordinary geotechnical engineering. It has the characteristics of deep burial and concealment, and once the seal fails, it forms a leakage path, which wastes resources and energy resources, harms the environment and endangers human and animal lives. (reservoir behavior) monitoring and prediction of reservoir performance is particularly important. Simulation and analysis of surface deformation caused by gas injection can be used to predict reservoir engineering disasters, guide the design of tiltmeter array for monitoring rock deformation, calibrate existing geological models, etc., are effective in monitoring surface deformation. The foundation of inversion and prediction of deep reservoir dynamic is carried out by historical fitting of construction process. In order to provide feasible methods and ideas for full-field modeling and analysis of surface deformation caused by reservoir gas injection engineering, the following achievements have been made: (1) by reading and analyzing the literature works of domestic and foreign scholars, The present situation and future research trend of carbon dioxide sequestration at home and abroad are summarized, and the research contents in the field of far-field rock mechanics effect of reservoir engineering are summarized. (2) Abstract the concept model of the deep reservoir under the constraint of initial in-situ stress field, which is caused by the gas injection process to cause the near far-field secondary elastic effect. The approximate ability of the simplified model to the practical engineering problems is gradually increased by using the full-field two-dimensional model or the full-field three-dimensional model, using analytical solution derivation, boundary element program solving, FLAC-3D software simulation and so on. The results and rules of full-field modeling and analysis for this problem are obtained. It lays a foundation for the establishment of full-field modeling and analysis method for the practical engineering scale of this kind of problems. (3) aiming at the characteristics of full-field modeling and analysis of surface deformation caused by gas injection, A large scale gridded discrete source program is developed. The Eclipse reservoir model can be automatically transformed into a FLAC3D full-field geological model by running the program, and the result of Eclipse reservoir flow analysis can be converted to be used in FLAC3D rock mechanics analysis. Thus the unidirectional coupling of reservoir flow and near-far-field rock mechanics effect is realized. (4) based on the self-developed source program, the surface deformation of a large salt water layer carbon dioxide sequestration project after injecting gas for a certain time is simulated. This paper studies some special problems such as the limitation of approximation ability encountered by the conventional simulation process, reveals the reasons and gives the solutions. This paper discusses the influence of the thickness of overlying strata in the full-field geological model, that is, the depth direction modeling range, on the accuracy of surface deformation simulation.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.7
【参考文献】
相关期刊论文 前5条
1 谷丽冰;李治平;侯秀林;;二氧化碳地质埋存研究进展[J];地质科技情报;2008年04期
2 鲍健强;苗阳;陈锋;;低碳经济:人类经济发展方式的新变革[J];中国工业经济;2008年04期
3 李义曼;庞忠和;;二氧化碳地质封存中的水-岩反应动力学模拟:进展及问题[J];吉林大学学报(地球科学版);2012年S2期
4 周强;丁瑞;刘增智;;煤层储存二氧化碳的研究进展[J];煤炭科学技术;2008年11期
5 范基姣;张森琦;郭建强;马致远;李旭峰;张徽;;水环境同位素技术在二氧化碳地质储存中的应用探讨[J];水文地质工程地质;2013年01期
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