The teaching program of 《 Mechanics of oil and Gas Flow in Porous media》 Major: Petroleum Engineering, marine oil and gas engineering Periods: 54 Credits: 3 Course Type: Fundamentals of subject curriculum Course Property: required 1. Course Property Teaching Objective The course< Mechanics of Oil and Gas Flow in Porous Media is one of the main basic lessons of major petroleum engineering and major marine oil and gas engineering. Its purpose is through various teaching link to make the students master the law of the oil, gas, water flow in the formation, and the basic research method of the law of fluid flow in porous media. It can set good preparation for the student to choose a reasonable model to study the laws of fluid motion and prepare for the dynamic prediction according to the formation characteristics, fluid properties and geological conditions after graduation, and prepare necessary professional theoretical knowledge fo working out real issues in the process of oil and gas field development and research work 2. The teaching contents Introduction The basic contents and requirements History of fluid mechanics in porous medium and its main contents and its role in oil levelopment. The characteristics of this course and its learning methods. The relationship with other disciplines of this course Chapter 1 Basic law of percolation The basic contents and requirements 1)Static state in reservoirs, the distribution of oil and gas in reservoirs, oil-water interface, oil-gas nterface, the type of reservoir boundary, and some commonly used pressure concept in oil and as field development process (2) The main displacement force in reservoirs: hydrostatic pressure, elastic energy of formation and he fluid in it, elastic energy of dissolved gas, elastic energy of gas cap and action of gravity The definition and expression of compression coefficient of fluid and rock and the total coefficient of compressibility of fluid and rock. The drive mode of reservoirs ()Continuous medium. The Darcy's law and Darcy's formula, percolation velocity and actual elocity, the differential form of Darcy's law and dimension of permeability 4)Limitations of Darcy's law, criterion and the formula that determine the failure of Darcy's law Binomial percolation law, exponer Teaching focu The main drive force in reservoir, the limitations of Darcy's law Teaching difficulties Drive mode of reservoirs, criterion and the formula that determine the failure of Darcy s law Chapter 2 Steady state percolation of single-phase incompressible fluid The basic contents and requirements (1)Three basic forms of percolation; (2)Planar one-dimensional steady state percolation of single-phase incompressible fluid ()Planar radial fluid flow of single-phase incompressible fluid, resistance loss in the process of percolation, the concept of average formation pressure and its calculation (4) Classification and research methods of imperfect well, skin factor, systematic well testing (5)Continuing equation of single-phase fluid percolation, state equation, Darcy equation and the basic differential equation of single-phase compressible fluid percolation. Boundary condition nd initial condition of reservoir, and the basic differential equation and its solution of single- phase incompressible fluid percolation
Teaching focuses Three basic forms of percolation, the production formula and pressure distribution condition of planar one-dimensional and radial steady state percolation of single-phase incompressible fluid concept of skin factor, continuing equation of single-phase fluid percolation, the basic differential equation of single-phase compressible fluid percolation and the basic differential equation and its solution of single-phase incompressible fluid percolation eac c hing difficulties The production formula and pressure distribution condition of planar radial steady state percolation of single-phase incompressible fluid, continuing equation of single-phase fluid percolation, the basic differential equation of single-phase compressible fluid percolation and the basic differential equation and its solution of single-phase incompressible fluid percolation Chapter 3 Interference theory of oil wells under rigid water drive The basic contents and requirement (1) Interference of wells, the superposition principle of pressure drop, the superposition principle of otential, the relationship between flow velocity and the potential function (2) The method of mirror: Interference of uniform-intensity one source and one sink--the source- sink image method, the interference of two sinks equal in intensity--sink point image method, popularization and application of mirror image method in the reservoir of complex boundary Teaching focuses Interference of wells, the superposition principle of potential, the method of mirror Teaching difficulties The superposition principle of potential, the method of mirror Chapter 4 Unsteady state percolation of slightly compressible fluid The basic contents and requirements: (1) Pressure transmission process and pressure distribution curve when the well product with onstant flow rate or constant bottom hole pressure under the condition of constant pressure boundary or closed bounda (2)The planar one-dimensional unsteady state percolation in semi-infinite formation and elastic fluid unsteady state percolation towards one well in infinite formation. Characteristics and the production and pressure distribution formula of pseudo-steady state percolation and the lination the ending time of unsteady state transient period ()Multi interference of wells of elastic unsteady state percolation, superposition principle of pressure drop, the image method in formation with linear boundary and Duhamel principle solving the problem of changing production (4)Unsteady state well testing analysis, the pressure fall-off test and pressure build-up test Teaching focuses: The planar one-dimensional unsteady state percolation in semi-infinite formation and elastic fluid unsteady state percolation towards one well in infinite formation Characteristics and the production and pressure distribution formula of pseudo-steady state percolation towards well in finite closed elastic formation. Multi interference of wells of elastic unsteady state percolation, superposition principle of pressure drop, the image method in formation with linear boundary and Duhamel principle solving the problem of changing production. The pressure fall-off test and pressure build-up test Teaching difficulties: The planar one-dimensional unsteady state percolation in semi-infinite formation and elastic fluid unsteady state percolation towards one well in infinite formation. Duhamel principle solving the problem of changing production. The pressure fall-off test and pressure build-up test Chapter 5 Percolation law of natural gas The basic contents and requirements (1)Properties of natural gas: Equation of state of gas, compressibility and the standard condition of natural gas. The basic differential equation of gas percolation, the concept and calculation of pseudo-pressure and pseudo-time state percolation of gas. The distribution formula of pseudo-pressure and the production
formula under the condition of planar one-dimensional and radial steady state percolation which obey Darcy's law. The percolation of gas obeying the binomial theorem, multi-point steady state well testing and the determination of the absolute open flow potential of gas well (3)Unsteady state percolation of gas, the basic assumptions and mathematical models, The pressure distribution formula of constant rate gas well in infinite formation, and pseudo-steady state percolation of a gas well when producing in limited formation and the application of binomial law in unsteady state percolation of gas Teaching focuses The basic differential equation of gas percolation, the concept and calculation of pseudo pressure and pseudo-time. Steady state percolation of gas. The distribution formula of pseudo- pressure and the production formula under the condition of planar one-dimensional and radial steady state percolation which obey Darcy's law. The percolation of gas obeying the binomial theorem, multi-point steady state well testing and the determination of the absolute open flow potential of gas well. Unsteady state percolation of gas, the basic assumptions and mathematical model Teaching difficulti The basic differential equation of gas percolation, the concept and calculation of pseudo- pressure and pseudo-time Chapter 6 Foundation of water/oil displacement theory The basic contents and requirements (1) Piston like displacement of oil by water. the theory of planar one-dimensional and radial piston like displacement of oil by water, and the shrinkage of oil edge (2)Theoretical foundation of non-piston like displacement of oil by water, Basic assumptions and mathematical models. The differential equation of saturation distribution of planar one- dimensional and radial non-piston like displacement of oil by water. Saturation distribution formula is obtained using the method of characteristics, and the determining method of front and average saturation Changes of the flow resistance and production in the process of displacement of oil by water Teaching focuses: The theory of planar one-dimensional and radial piston like displacement of oil by water. The differential equation of saturation distribution of planar one-dimensional and radial non-piston like displacement of oil by water. Saturation distribution formula is obtained using the method of characteristics eaching difficulties The theory of planar one-dimensional and radial piston like displacement of oil by water. The displacement of oil by water. Saturation distribution formula is obtained using the method or like differential equation of saturation distribution of planar one-dimensional and radial non-piston like characteristics Chapter 7 Percolation theory of oil-gas two phases(dissolved gas drive) The basic contents and requirements (1) The continuity equation and the basic differential equation of oil-gas two-phase percolation (2)Oil-gas two-phase steady state percolation. The concept and calculation of the production gas- il ratio and the pressure function, and the production formula of oil-gas two-phase steady state (3)Unsteady state percolation of gassy fluid. Method of alternation of steady state. The calculation and prediction of average oil saturation, the production gas-oil ratio and oil pre Teaching focuses The continuity equation and the basic differential equation of oil-gas two-phase percolation Oil-gas two-phase steady state percolation. The concept and calculation of the production gas-oil percolation. Unsteady state percolation of gassy fluld ula of oil-gas two-phase steady state ratio and the pressure function, and the production for Teaching difficulties The continuity equation and the basic differential equation of oil-gas two-phase percol The calculation and prediction of average oil saturation, the production gas-oil ratio and oil
3. The basic teaching requirements (1) This course includes several parts: teaching in class, using media, self-learning of student arranging tas. guIc (2)Using the method of uniting teaching in class and media together to deepen students understanding and grasp of knowledge and train and improve students'interest and enthusiasm of this course (3)Requires students to read preview and review after class, make them learn the met of self-learn and access to knowledge (4)Through the teaching of this course to make students understand and grasp the outline of required knowledge and lay the foundation for learning of follow-up courses and related 4 Periods assignment Contents Introduction and Chapterl Basic law of percolation 4 Chapter 2 Steady state percolation of single-phase incompressible fluid Chapter 3 Interference theory of oil wells under rigid water drive Chapter 4 Unsteady state percolation of slightly compressible fluid Chapter 5 Percolation law of natural gas 8888 Chapter 6 Foundation of water/oil displacement theory Chapter 7 Percolation theory of oil-gas two phases(dissolved gas drive) Total 54 5. Recommended textbooks and reference Recommended textbooks Lidang. Chenjunbin. Mechanics of Oil and Gas Flow in Porous Media. Beijing: Petroleum Industry Press, 2009.(in Chinese) Lidang. Chenjunbin. Mechanics of Oil and Gas Flow in Porous Media. Beijing: Petroleum Industry Press, 2012. (in English) Reference: [1 Liuweining The foundation of fluid mechanics in porous medium. Beijing: Petroleum Industry Press, 1985. (in Chinese) [2]Gejiali. The fluid mechanics in porous medium of reservoirs. Beijing: Petroleum Industry ress, 1982.(in Chinese) [3] M A. APHbIM[former Soviet Union]. The dynamics of water and gas underwater. Translated in Chinese by Chenzhongxiang and Langzhaoxin etc. Beijing: Petroleum Industry Press, 1982 [4]R. E. Collins. The flow of fluid passing through the porous materials. Translated in Chinese by Chenzhongxiang. Beijing: Petroleum Industry Press, 1984 [5] Bill J. The fluid dynamics of porous medium. Translated by Lijingsheng etc. Beijing: China Building Industry Press, 1983
