Subjects Description Hydraulic research is developing beyond traditional civil engineering to satisfy increasing demands in natural hazards, structural safety assessment and environmental research. The conference served as a major forum to promote technological progress and activities, technical transfer and cooperation, and opportunities for engineers and researchers to maintain and improve scientific and technical competence in the field of hydraulic engineering, environment and safety engineering, and other related fields. The selected papers mainly focus on theory and technologies related to hydraulic engineering, ecological structures in hydraulic engineering, stability and risk of hydraulic structures, estuary improvement and shoreline restoration, river engineering and sediment transport, dredging technology and equipment, flood hazards and innovative control measures, complex flow modelling, environmental hydraulics and hydrology, water purification, wastewater treatment, and geotechnical aspects in hydraulic engineering. Hydraulic Engineering V will be of interest to academics and engineers involved in Hydraulic Engineering and Environmental Engineering.
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Abstract Hydraulic fracture propagation characteristics in glutenite formation are studied by a series of servo-controlled triaxial large-scale fracturing experiments. The experimental results show that the fractures extend along the gravel and sandstone cementing face, and fracture geometry in glutenite formation is complex, which is similar to network fractures.
The phenomenon of the gravel being split has not been observed. In the process of the fracture extension, the extension pressure is fluctuating, and the degree of fluctuation is more drastic with the gravel diameter increase.
This paper suggests that using large rate and multislug technology would increase the flow ability of the carrying fluid. The conclusions are significant to hydraulic fracturing in glutenite formation. Introduction Glutenite reservoir is widely distributed in China, such as the Sheng Li oil field and Xinjiang oil field.
Hydraulic fracturing is the key technology used in the exploitation of this kind of reservoir. But the hydraulic fracture extension pressure is influenced by the gravel in glutenite reservoir, which usually leads to the failure of the fracturing treatment.
When the hydraulic fracture meets gravels in the process of propagation, as the lithology mutations, the hydraulic fracture propagation direction and geometry would be altered. Many scholars use large-scale triaxis hydraulic fracturing simulation experiment device to simulate the hydraulic fracture extension and geometry under various reservoir conditions.
They took into account the influence of the natural fracture strike and dip. Bohloli and de Pater [ 4 ] performed a series of large-scale triaxial experiments to study the hydraulic fracturing in soft rocks.
They observed that fractures obtained at high stress were short, branched, and tortuous while those obtained at low stress were mainly longer, straight, and less tortuous.
They observed that the fracture propagation pressure is smooth and steady. This paper conducted a series of hydraulic fracture initiation tests with a large-scale triaxis hydraulic fracturing simulation experiment device and artificial glutenite core with different gravel diameters.
Through the observation and analysis of fracture profile and pressure curve, the characteristics of hydraulic fracture geometry and propagation in glutenite reservoir were analysed, and we can draw some significant conclusions which can be adapted to improve the fracturing response in glutenite formation.
Experimental Setup and Procedure 2. Experimental Setup The experiments are performed in a large-scale triaxial simulation test system. The system is composed of a triaxial assembly, a servo-booster pump, an acoustic emission instrument, a data acquisition system, a laboratory stabilized power supply unit, an oil-water isolating device, and other auxiliary devices Figure 1.
Schematic of a triaxial hydraulic fracturing test system. Cubic blocks of mm on a side are positioned between the pressure plates. In order to simulate the horizontal minimum principal stress, we add pressure, respectively, to the fractured interval and the top and bottom interlayer by three pairs of pressure plates in one horizontal direction.
In the other horizontal and vertical direction, we simulate the vertical stress and horizontal maximum principal stress by a pair of pressure plates, respectively. The multichannel hydraulically voltage stabilizer provides pressure plates hydraulic pressure, and the pressure of every channel could be controlled each channel for the biggest liquid pressure can reach 27 MPa.
The pressure platens are equipped with four square sheets to ensure equal pressure distribution. The fluid injection pressure is provided by a servo-hydraulic pump MTS Natural blocks or artificial blocks could be used for hydraulic fracturing experiment.
Considering the difficulty of obtaining natural rock and the condition of processing, this paper conducts hydraulic fracturing with artificial rock. The experiment blocks were prepared with a special mould Figure 2.
The 10 cm section around the open hole was using the mixture of Chinese cement numberquartz sand, and gravel, and the other parts of the glutenite samples were mixed with Chinese cement number and quartz sand.
The mass ratio of cement to quartz sand was 1: Artificial blocks moulds and bottom board assembly diagram. We mixed a red dye in the fluid to improve detection of the hydraulic fracture. The steps of preparing the glutenite samples are as follows. Firstly, cast a basement about 5 cm with cement and quartz sand at the bottom of the sample.
Secondly, put a wellhole in the center of the sample. Then, the wellhole was perforated along 50 mm with 4 mm diameter perforations at degree phasing, putting a fine screen mesh around the wellbore about a radius of 10 cm thin and casting with cement, quartz sand, and gravel inside the fine screen mesh Figure 3.
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Thirdly, cast 15 cm high outside the fine screen mesh with cement and quartz.Lab Manual (Hydraulics Engineering) - Download as PDF File .pdf), Text File .txt) or read online.
At section lausannecongress2018.comLICS ENGINEERING LAB MANUAL EXPERIMENT # 03 TO STUDY THE FLOW CHARACTERISTICS OVER THE HUMP OR WEIR IN A RECTANGULAR CHANNEL OBJECTIVE To study the variation of flow with the introduction of different types of weirs in the /5(2).
The inverse method was then evaluated by comparing estimated soil hydraulic properties with those determined independently using an equilibrium analysis. The optimized soil hydraulic properties compared well with those determined using equilibrium analysis and steady state experiment.
3. Transitional flow: Transitional flow is a mixture of laminar and turbulent flow, with turbulence flow in the center of the pipe and laminar flow near the edges of the pipe. A hydraulic test system in Fig.4 has been developed for the experiment, with a flowmeter and two pressure sensor installed to measure the flow rate and pressure at both sides of the valve.
The pressure. In this article we will discuss a simple fluid mechanics experiment using Pascals law as principle. Also we will see about the calculation related to the experiment and its one application in the hydraulic steering system that is employed on board the ship for steering the ship either to port side or starboard side.
Also includes a diagram of a ship's rudder system and the flow of pressure. MAHATMA GANDHI MISSION’S JAWAHARLAL NEHRU ENGINEERING COLLEGE, AURANGABAD. (M.S.) In open channel water flows under atmospheric pressure, when water flows in an open channel, resistance A venturiflume is a critical-flow open flume with a constricted flow which causes a drop in the hydraulic grade line, creating a critical depth.