• 期刊名称:岩土工程物理与数值模拟
  • 出版周期:季刊
  • 外文:Physical and Numerical Simulation of Geotechnical Engineering
  • ISSN:1838-3254
  • 出版单位:St. Plum –blossom Press (Australia )
  • 出版地:澳大利亚•墨尔本

浏览次数 3333次

上一期岩土第十七期 / 刊出日期:2014-12-30下一期
目录
  • Experimental Study on the Single Well Production R

    ZHOU Qi, JIANG Hanqiao, LI Junjian

    Vuggy carbonate reservoir, Water injection huff and puff, Nitrogen injection, Flow mechanisms, Influence factors
    235PDF摘要

    According to the geologic characteristic and the development performance of Tahe oil field, physical simulation experiment system was established while using similar analysis to simulate single well production in different exploitation mode, for vuggy carbonate reservoir under a set of reservoir condition. Experiments were carried out on depletion production, water injection huff and puff and gas injection huff and puff. The experiment results showed that water injection huff and puff as well as that of gas injection can improve the recovery efficiency of vuggy carbonate reservoir. Formation structure had minimum influences on the water injection production performance, but had considerable influence to the gas injection production performance. Heavier component in oil can lead to longer water free production, lower recovery efficiency and rapid increase in water cut.

  • A Study on Porous Flow Mechanism of Foamy Oil

    LI Jian 1,2, QIN Jishun 2, ZHANG Xunhua 3,4

    Foamy oil, Microscope experiment, Cold heavy oil production, Mechanics
    274PDF摘要

    In the cold heavy oil production, the dissolved gas in the viscous oil will cause foamy oil, which made the recovery of heavy oil much higher than pure dissolved gas drive. To discover the mechanics of this phenomenon, forming process of foamy oil in the process of cold heavy oil production is simulated with the microscope model. With the microscope model, formation, incorporation and split of gas bubbles are seen using microscope experiment. This study is of great significance to coach the cold heavy oil production.

  • Simulation of Heterogeneous Soil Water Flow Using

    WANG Kang 1, WU Jingfeng 2

    Active region model, Preference flow, Percolation
    264PDF摘要

    Preferential flow in the unsaturated soil is an important and common phenomenon, which is difficult to be characterized. The objective of this paper is to evaluate the Active Region Model (ARM), which incorporated the fractal flow patterns into the continuum approach, developed to characterize preferential water flow in the unsaturated zone. Experiments were conducted to measure water flow process in a bare soil landfill cover and an ET landfill cover. Modeling analysis indicated that the water content distributions could be simulated generally well with the ARM by considering preferential flow in the porous media. Compared with the ARM, the continuum model underestimated percolation for both bare soil and vegetation coved plots.

  • Numerical Analysis of Saturated-unsaturated Seepag

    YAO Huayan 1, ZHANG Zhenhua 2

    Permeability coefficient, Anisotropic, Saturated-unsaturated, Rainfall infiltration
    244PDF摘要

    Permeability coefficient is a main factor effecting slope seepage field under rainfall infiltration. The heterogeneity of soil is very strong. As a result, the permeability of soil is anisotropic. Based on the saturated-unsaturated seepage theory, the pore water pressure distribution of a slope having different ratios of anisotropic conductivity and different angles between its principal directions of hydraulic-conductivity anisotropic and horizontal direction are simulated using finite element method. The change in law of pore water pressure under rainfall infiltration is gained. The study can provide important basis for slope stability analysis and landslide prediction.

  • Establishment and Evaluation of Effective Driving

    LIU Hualin, XIONG Wei

    For rapid production decline, difficult production maintenance capability in low permeability reservoirs, and pressure transmission discipline between injection and production wells, effective driving
    253PDF摘要

    Low permeability, Production decline, Effective driving pressure system, Mirror image theory, Rectangular nine-spot pattern, Terminal well draining

  • Research of Scaling and Distribution Regularities

    LIU Yikun, JIANG Shengdong, FAN Meng, LIANG Shuang

    ASP flooding, Scaling, Remaining oil, Enhanced oil recovery, Experiment
    264PDF摘要

    ASP flooding is an effective method to enhance the recovery, which usually improves oil recovery about 20% than water flooding. However, the extent of formation scaling after ASP flood-ing is not clear and there is still a lot of crude oil remaining in the reservoir. Therefore, it is of great significance for the study of scaling and remaining oil distribution after ASP flooding. In this paper, we use the scanning electron microscopy to contrast and analyze the reservoir rock microscopic pore structure changes and scaling after ASP flooding, and make use of laser scanning confocal microscopy to study the distribution and types of the microscopic remaining oil after ASP flooding. The results show that the phenomenon of reservoir corrosion and scaling after ASP flooding is serious that lead to the appearance of intergranular adsorption remaining oil, and most of the remaining oil is still the thin film remaining oil on the rock surface. Therefore, we should pay more attention to improve ASP flooding, reduce the scaling and increase the ability to displace the thin film remaining oil.

  • Effect of Seepage Control and Drainage Measures on

    HUANG Liuke 1, LI Yuan 2, LI Guang 2, LI Ang 3

    Slope, Seepage, Control drainage, Stability
    259PDF摘要

    In order to investigate the influence mechanism of seepage control and drainage measure on slope stability, and provide theoretical support for engineering design, a numerical model was established in this paper using Geo-slope software. Through numerical simulation, slope safety coefficient changing law under different conditions, which inflect anti-seepage and drainage measures, were studied. The results showed that the anti-seepage and drainage have excellent improvement on the mechanical properties and stability of the slope.

  • Control of First and Permanent Waterproof in Roadw

    LI Guofu 1,2, LI Yuhui 3, DAI Tieding 4

    Roadway, Curtain grouting, First-waterproof, Rigid-flexible layer, Permanent water proof
    291PDF摘要

    The water exit point before driving or at driven roadway and delaying water bursting could be controlled by curtain per--grouting. Rigid-flexible packing layer setting behind the wall of roadway could accomplish permanent water proof effect. In the research, according to effective stress action principle of rock and soil, mechanical model of water exit point is established, constitutive relation of hydrodynamic pressure and contact pressure of rock and soil is analyzed, the phenomenon that effective stress increases and pore water pressure decreases gradually for curtain pre-grouting process and the dynamic balance is finally discovered. In the grouting process, the first water plugging effect is realized when the effective stress and total stress reaches equilibrium. Rigid-flexible packing layer is designed behind brickwork which could increase effective stress, reduce pore water pressure and reach permanent water proof effect. This provides a theoretical basis for roadway driving and permanent water shutoff .The monitoring and application result shows that the first and permanent waterproof theory provides effective method for roadway driving waterproof.

  • Inquiring into the Water Damage and the Waterproof

    CHENG Yingwei 1, WANG Yueli 2

    High-grade highway, Asphalt pavement, Water damage, Waterproof and drainage design
    288PDF摘要

    The drainage system design is the most important part in the design of high-grade highway, and it plays a very important role in ensuring the usage performance and service life of high-grade highway. This paper analyzed the reasons of water damage, and summed up the deficiencies in the waterproof and drainage design on high-grade highway asphalt pavements in China. Aiming at these deficiencies, especially the pavement subsurface drainage and the water seepage of median separator, some idiographic engineering measures are put forward which supply a reference for the waterproof and drainage design of high-grade highway in southern China.

  • Study on the Selection of Deformation Monitoring P

    ZHANG Zhenhua, YAO Huayan, YE Fei

    Fuzzy pattern recognition, Numerical subarea, Monitoring profiles
    276PDF摘要

    Under the conditions of water-impoundment and running of Three Gorges Reservoir, the sensitive degree of the change of displacement to the fluctuation of water level varies in different parts of a landslide induced by the fluctuation of water level. According to the relationship between different sensitive degree of monitoring displacement and quantity of monitoring information, the sensitive zones of displacement to the fluctuation of reservoir water level are divided into different degrees by the approach of fuzzy pattern recognition. By means of the numerical subarea regulation of the change of displacement of Xietan landslide, the general rules of the layout of deformation monitoring profiles are put forward. According to the rules, the layout of deformation monitoring profiles of Xietan landslide which is a case of landslides induced by the fluctuation of water level of Three Gorges Reservoir are given.

  • Analytical Study on Hydraulic Seepage Pressure Beh

    WANG Cheng, LIU Fusheng

    Circular tunnel, Radial stable seepage, External hydraulic pressure, Analytical method
    270PDF摘要

    The distribution law of hydraulic pressure in lining, reinforced circle of rock-mass and surrounding rocks of the circular tunnels with reinforced circle are obtained based on polar coordinate seepage analytic principle, under the assumption that there is a radial stable seepage in the lining, reinforced region and surrounding rocks. It can provide the reference basis for the supporting parameters of the tunnel engineering. According to an example, the external hydraulic seepage pressure with nonlinearity upon the lining is obtained. It demonstrates that the reinforced circle can decrease the external hydraulic seepage pressure upon the lining.

  • Research of Subsea Pipeline Network Management for

    ZHANG Shude 1, CHEN Wei 2, WANG Dongbao 2, XU Zhon

    Subsea pipeline network, Pipeline network management, Subsea pipeline network company, Monitor systems
    259PDF摘要

    As there is demand for the offshore oil and gas development in China Sea, the subsea pipeline network management is a priority for offshore energy development in China. In this paper, the offshore pipeline network management methodology for China Sea was summarized by research on the global subsea pipeline network management. The management includes the signal collection, the pressure regulating system, the communication method and the monitor systems with the hardware and software. In addition, suggestion on the establishment of a domestic subsea pipeline network company in China were summarized by the means of investigation on the global network company and Chinese present situation on the subsea pipeline network management.

  • The Researches on Numerical Simulation of Heat-Flo

    CAO Zhixiang 1, ZHU Xuejia 2

    With the development of industries, the limits of resources and environmental enhancement, researching on the phenomenon of multi-phase coupling is an effective way to improve resource utilization. Th
    273PDF摘要

    With the development of industries, the limits of resources and environmental enhancement, researching on the phenomenon of multi-phase coupling is an effective way to improve resource utilization. The phenomenon of heat-fluid coupled with temperature and velocity was recognized in turbulent flow field by numerical simulation based on FLUENT software and user-defined function (UDF). By setting the shape of the pipeline to change the flow of the state, the velocity distribution and temperature contours are shown by Numerical calculation. The results which demonstrated that the threaded tube increased turbulence intensity, and velocity field and temperature field have certain relevance, are revealed in this paper. It is clear that the greater the turbulence, the better the heat transfer, and the higher the heat transfer efficiency, which will help increase the turbulence intensity. The theory provides theoretical basis for determining empirical formula reflecting phenomenon of heat-fluid and effectively controlling measures of consuming energy.

  • Study on Seepage Behavior and Control of Longtouqi

    CHENG Shengguo, ZHANG Zhenhua

    Earth dam, Seepage, Control, Programmer, Finite element
    263PDF摘要

    Seepage behavior and control is the focus of earth dam, and is one of the major factors of accidents. In this article, based on the seepage of homogeneous earth dam of Longtouqiao, engineering geology prosperities of dam site area, physical and mechanical prosperities of material filling dam, dam operation and management status were studied. Program of seepage control was made according to the state criterion of earth dam design, and we adopted a technique of blocking in foreside and draining on the back. The works of programs are analyzed and optimized technically and economically, determining the optimal programs. Effect reconstruction is rehabilitated to analyze the seepage control of the dam, and the result shows that the measure is significant. It can be applied and is very important to other projects.

  • Experiential Discrimination of Sandy Soil Liquefac

    HE Xiaoming, GUAN Peng

    Jingzhou Yangtze River Bridge, Venue, Sandy soil liquefaction, Experiential discrimination
    265PDF摘要

    Through analysis, the engineering geological characteristics of the Jingzhou Yangtze River Bridge-site’s foundation, has drawn out the question of which sandy soil liquefies at this kind of location. On this basis, the discrimination method of sandy soil liquefaction has been chosen, and probed into the three experiential methods of sandy soil liquefaction. Evaluations on actual projects were carried out based on these three methods on the Jingzhou Yangtze River Bridge-site's foundation, thus putting forward the basic design of Jingzhou Yangtze River Bridge.

  • Coupling Between Seepage and Stress and Its Effect

    YU Quanfa 1, LI Tao 2

    Tunnel, Seepage, Stress, Coupling, Hydromechanical
    274PDF摘要

    The coupling equation between the seepage coefficient and the stresses is improved. Based on the theory of elasticity and the improved coupling equation, the stresses and displacement in the adjoining rock of the tunnel are derived under stationary seepage condition, and the finite difference method is used to solve the stresses and displacement distribution. The example shows the effect of the coupling on the stresses.

  • Determination of Minimum Submergence Depth of Rod-

    HUANG Youquan

    Polymer flooding, Rod-pump well, Submergence depth, Entrance pressure
    277PDF摘要

    The produced liquid from producing wells of polymer flooding exhibits Non-Newton properties obviously, and the pipe flow and pump inflowing regulation shows a great difference from the general water flooding. It is essential to determine the minimum submergence depth in order to ensure the normal operation of these oil well pumps. In this paper, the calculation methods of pressure drop and pump suction nozzle pressure of the mixture flow in the vertical well bore have been established. According to the pump valve operational principle, the minimum submergence depth determination method has been proposed and the influencing factors have also been analyzed. The research results show that the rheological property of polymer-bearing produced fluid is in accordance with the power-law mode. The polymer concentration and water content of produced fluid present a great influence on the minimum submergence depth of polymer pumping well. The desirable minimum submergence depth bounds increase as the polymer concentration increases. The smaller the pump diameter, the higher is the desirable minimum submergence depth. The greater the polymer concentration, the larger the desirable ascent rate of minimum submergence depth. With the decrease of liquid production, the desirable minimum submergence depth decreases, and the polymer concentration and water content shows a smaller effect.

  • Analysis of Groundwater Seepage in Expansive Soil

    LU Rong 1, HE Xiaoming 1, JI Youjun 2

    Expansive soils, Groundwater seepage, Simulation, Stability of slope
    281PDF摘要

    Water is the main reason for slope failure due to expansive soil. In this paper, the saturated-unsaturated seepage model of the expansive soil was established. We simulated and calculated the slope seepage of a section of Xiangshi highway under rainfall condition. The result was in accordance with the practical observation, which is of significance for realizing the systematic evaluation of slope failure and improving the reliability and security of the expansive soil slope.

  • The Screening of Pour Point Depressant and the Flo

    LYU Xupeng 1, CHEN Xiaoyu 2, ZHU Pan 2, LING Peiwe

    High-pour-point crude oil, Screening of pour point depressant, Flow characteristics, Structure of wax crystal
    285PDF摘要

    Aiming at solving the transportation problems in the waxy crude oil with high pour points in some sea area of China, screening experiments were performed on the pour point depressant. Based on the physical parameters of the crude oil in Formation P14 of Well Y001 of that sea area, studies were carried out on the matched simulated oil. The best pour point depressant and treatment situation was determined, taking the reduction of pour point and viscosity as a breakthrough. Results showed that pour point depression effect became obvious after diluting simulated oil with 30% condensate oil. Pour point depressant YHJN-001with the best pour effect can lower down the pour point of the oil sample to 9℃, meeting the requirement of safe transportation (pour point should be lower than 9.3℃). The best dosage of pour point depressant was 1000 ppm, and the heating temperature for crude oil was 70℃. Anomalistic point of diluted and simulated oil with pour point depressant was 31℃, wax precipitation point was 45.35℃, and the grain sizes of the wax crystal were relatively larger, with the trend of gathering into groups, and symmetry of wax crystal became better.

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