Simulation of Single Fracture Propagation which is Based on Mesh Free Method 应用无网格法对单裂纹扩展的数值模拟
NMR and MRI Study on Reservoir Rock and Application to Porous Flow Mechanics and Petroleum Engineering; Permeability of single fracture under coupled hydrological – mechanical – chemical action 岩石核磁共振及其在渗流力学和油田开发中的应用研究渗流-应力-化学耦合作用下单裂隙渗透特性
This is a single fracture that is very small, like the width of a hair. 这是一个单一的骨折,这是非常小的像头发的宽度。
The animals in Group A, Group B and Group C represented respectively single fracture, multiple fractures and severe maxillofacial injury associated with brain and eye injury. 形态学改变A组为单纯局部损伤,B组为较严重的多发性骨折,C组为局部粉碎性骨折、骨缺损合并眼和脑组织损伤。
Based on analyzing the micro critical seepage phenomena of gas-liquid two-phase flow in a single fracture, a random and compound mathematical model was constructed to describe this phenomenon. 通过对裂缝中气液二相流体临界渗流现象的分析推理,建立描述这一现象的随机混合渗流数学模型。
Firstly, the advantages and disadvantages of present measurement and determination methods of unsaturated hydraulic parameters for a single fracture are commented upon. 首先,评述了现有的测定和确定单裂隙非饱和水力参数的几种方法的优缺点,为单裂隙非饱和水力参数的确定提供了理论依据。
Permeability of single fracture under coupled hydrological – mechanical – chemical action Introgression may take place in such situations. 渗流-应力-化学耦合作用下单裂隙渗透特性在这种情况下可能发生渐渗现象。
A discrete air-water interface is used to separate the saturated zones from the drained zones within each single fracture of fracture network. 非饱和带裂隙中的饱和区和排干区可以用一个离散的气-水界面分隔开。
A single fracture is when a bone is broken in just one place. 单一骨折是指骨头在一个部位破裂。
Results Both single fracture or complex multiple fractures could clearly be showed in detail on3D-SSD imaging. 结果无论是单发骨折还是复杂的多发骨折均能在3D-SSD成像上对其细节清晰显示。
An analysis of finite element model on nuclide migration in single fracture rock 单裂隙岩体中核素迁移行为的有限元分析
Review of the research on solute transport in a single fracture 单裂隙介质中的溶质运移研究综述
Review of hydraulic fracturing on a single fracture of rock and concrete materials 岩石混凝土类材料单裂纹水力劈裂研究述评
Testing Study on seepage characteristics of single fracture with sand under shearing displacement 充填砂裂隙在剪切位移作用下渗流规律的实验研究
The method of the equivalence of the mechanical parameter is also given based on the deformation regularity of the normal and shear fracture of the single fracture. 在单一裂隙法向变形和剪切变形规律的基础上,给出其力学参数等效方法。
To derive and built the three-dimensional mathematical model of single fracture extension, and give out the solution method of model base on the correlation literary both here and abroad; 在参考国内外相关文献的基础上,推导和建立了多层压裂中单裂缝的三维延伸数学模型,并给出了模型的求解方法;
So based on the postulation that single fracture is an incompressible plane of isotropy multi-porous media, the Boundary Element Method of single fracture is derived by using the Weighted Residual Method. 本文基于将单个裂隙看作为一个不可压缩的二维各向同性多孔介质的假定,运用加权剩余法,推导了单裂隙渗流的边界单元法公式。
Finally, several problems of hydraulic fracturing on a single fracture to be studied are forwarded. 最后,提出单裂纹水力劈裂需研究的几个问题。
Based on the stress-sensitivity curve of single fracture and the in-situ stress state, the stress-sensitivity of subsurface fracture can be analysised, including prediction of fracture aperture and permeability. 根据单缝的应力敏感曲线和地下裂缝的受力状态可对地下裂缝的应力敏感性进行分析,包括预测裂缝开度和裂缝渗透率随应力的变化。
Multilayer fracture model usually make up of flow distribution model and single fracture extension model. 多层压裂裂缝延伸模拟模型主要是由流量分配模型和单裂缝延伸模拟模型两部分组成。
Single fracture space distribution equation is sometimes needed to determine the distribution of fractures in a reservoir. 在地质和油藏工程研究中,有时为了确定裂缝在三维油藏空间中的分布位置,需要获得单裂缝的空间分布方程。
Based on the theory of porous flow in a horizontal well with a single fracture, this paper presents mathematics models for a horizontal well with multiple infinite conductivity fractures by using superposition principle of potency. 论文在建立并求解水平井单裂缝系统渗流模型的理论基础上,应用势的叠加原理,建立了多裂缝系统压裂水平井的渗流模型。
A summary was made of the fundamental properties, experimental research results, hybrid models of fracture intersection, and mathematical models and simulation methods of solute transport in single fracture and network fracture scales. 总结了单裂隙尺度和网络裂隙尺度中溶质运移的基本特点、试验研究成果、裂隙交叉处的混合模式、数学模型以及模拟方法等。
A narrow parallel plates model is used to test and analyze oil migration process in a single fracture. 利用狭窄平行板裂隙模型来模拟和分析单个裂隙内油运移的过程。
In the modeling, both the single fracture model and compound fracture model are studied respectively. It is found that the Youngs modulus of rocks has a strong influence on the variation of rock stresses in the case of compound fracture model. 分别研究了单一断裂和复合断裂模型,在复合断裂模型中,断裂两侧岩石的弹性模量对应力变化的影响最大。
Models and Parameters Evaluation of Solute Transport in a Single Fracture 单裂隙中溶质运移模型和求参方法综述
The study is aimed at mainly single fracture mechanics and crack propagation based on the hydraulic cracks now. 以往的水力裂缝研究主要基于断裂力学基础上的单一裂缝扩展和延伸。
In terms of simulation results, fractal theory can reflect randomness of single fracture and complexity of fracture system and it is an effective modeling method. 4. 模拟结果证明,分形方法能很好地描述单一裂缝的随机性和整体裂缝系统的复杂性,是裂缝性储层建模的有效方法。
Why the single fracture extendibility and expandability in the hydraulic fracturing process studied by use of fracture mechanics exist errors compared with practical engineering is explained in this paper. 本论文的研究解释了运用断裂力学研究水力压裂单一裂缝扩展和延伸与实际工程存在误差的根本问题。
Fracture intersection points are acted as nodes, and fractures between nodes are regarded as linear element. According to cubic law of single fracture and mass conservation principle in fracture network, the seepage mathematics model for discrete fractured network is developed in fractured rock mass. 以裂隙交叉处作为节点,节点与节点之间的裂隙当作线单元,根据单裂隙立方体定律和质量守恒原则,建立了裂隙网络中水流运动的数学模型,并推导了数学模型的数值解法。