The established mathematical model thinks the oil or gas reservoir exploitation system as study object looking into the dynamic behavior and differential seepage laws of the reservoir production system.

But there are not any reports of achievements in studying fluid flow laws through porous media and productivity analysis of snaky wells. So the chief work in this dissertation aims at studying seepage laws and productivity analysis of snaky wells.

Study on the basic seepage laws under different working heads, with zippered plastic pipes as percolation irrigation pipe embedded at different depths underground in the shelf.

In order to exactly understand the diffusion behavior and seepage laws during gas injection in a fractured reservoir, this paper makes a theoretical study on this process, based on geology, fluid dynamics, diffusion physics, reservoir engineering and numerical simulation theories.

For a full well excavated down to the impervious stratum, the penetrating pattern could be considered as a model of canal network according to the seepage laws of vertical flow.

Based on the relationship between sections and discharge,the seepage laws are analyzed according to the need of water resources real-time regulation and long series allocation. Meanwhile channel seepage laws considering the short term effects of water regime and average seepage laws of long series water resources allocation are achieved.

Rock mass hydraulics is a new discipline for studying the interaction between seepage forces and stress with variable geotemperature in rock mass and effects of those coupled forces on stability of rock mass or engineering.In order to describe hydromechanical characteristic of rock mass,some basic concepts are defined. According to site investigation,the void structure of rock mass can be classified as six types,namely pore structure,sparse fracture network structure,dense fracture network structure,structure...

Rock mass hydraulics is a new discipline for studying the interaction between seepage forces and stress with variable geotemperature in rock mass and effects of those coupled forces on stability of rock mass or engineering.In order to describe hydromechanical characteristic of rock mass,some basic concepts are defined. According to site investigation,the void structure of rock mass can be classified as six types,namely pore structure,sparse fracture network structure,dense fracture network structure,structure combining sparse fracture network with pore solid,structure combining dense fracture network with sparse fracture network,and structure combining fractures with conduits in karst.On the basis of hydromechanical characteristic of rock mass,the rock mass structure can be conceptualized as five types,namely quasi-pore continuum,fracture network medium,double porosity media,conduit network medium in karst,and fracture and conduit media in karst.Based on structural types of rock mass,the seepage laws of pore rock mass,fractured rock mass and conduit in karst rock mass are presented,in which the laws take into account the effects of changing stress and temperature,From practical application point view,the models of coupled stress,seepage and temperature fields in rock mass can be classified as two types,that is lumped parameter model and distributed parameter model.The former includes multi-variable auto-regression model,artificial neutral network model, and nonlinear chaos dynamical model. The latter includes continuum model, equivalent continuum model,fracture network model, double porosity media model,and generalized double porosity media model.

It was founded that a large permeable soil-body would be formed when the ant-nest system located in an air-saturated zone of dyke body had been connected with desiccation cracks and cavities, and the cement grout penetrated usually in vertical directions. The grout of awl exploration grouting began a horizontal penetration only after the vertically penetrated soil-body had become saturated. For a full well excavated down to the impervious stratum, the penetrating pattern could be considered as a model of canal...

It was founded that a large permeable soil-body would be formed when the ant-nest system located in an air-saturated zone of dyke body had been connected with desiccation cracks and cavities, and the cement grout penetrated usually in vertical directions. The grout of awl exploration grouting began a horizontal penetration only after the vertically penetrated soil-body had become saturated. For a full well excavated down to the impervious stratum, the penetrating pattern could be considered as a model of canal network according to the seepage laws of vertical flow. During managing ant risks, special precautions should be taken to the pattern of ant-nest development and rational design of awl grouting holes. A synthetic control has to be made for grouting flow and pressure, transversal horizontal displacements, opening de cracks, etc. At the same time, testing work must be well done to insure the construction quality for the purposes of eliminating ant calamities and strengthening dyke (structures.)

The river courses in the lower Heihe River are all natural ones with irregular cross sections and great seepage,belonging to broad-shallow type of sandy riverbed.The channel seepage is of great significance to ecosystems in the lower reaches which supply groundwater to sustain natural vegetation.However the seepage situation of river courses in the lower Heihe River has not been monitored and investigated for a long time.The usual percolation coefficient method thus cannot be used for calculation.At present,...

The river courses in the lower Heihe River are all natural ones with irregular cross sections and great seepage,belonging to broad-shallow type of sandy riverbed.The channel seepage is of great significance to ecosystems in the lower reaches which supply groundwater to sustain natural vegetation.However the seepage situation of river courses in the lower Heihe River has not been monitored and investigated for a long time.The usual percolation coefficient method thus cannot be used for calculation.At present, the amount of seepage is mostly estimated with relatively simple ways.Based on the relationship between sections and discharge,the seepage laws are analyzed according to the need of water resources real-time regulation and long series allocation.Meanwhile channel seepage laws considering the short term effects of water regime and average seepage laws of long series water resources allocation are achieved.