Applied Mechanics and Materials Vols. 580-583

Abstract: This paper recommends the application of acidic fracturing technology for horizontal wells in Yubei region basing on its fractured reservoir’s characteristics, and the numerical simulation method is used to optimize the parameters of acidic fracturing. According to the results of optimization, the proper acid system is selected, and the construction parameters of acidic fracturing are optimized. According to the results of numerical simulation, we recommend the fracture half-length to be 120m, the fracture conductivity to be 30D.cm, and the fracture number to be 5. According to the properties of reservoir in Yubei region and the optimization results of fracture half-length and fracture conductivity, the alternative injection of crosslinked acid and ordinary gelled acid is recommend. The injection rate of crosslinked acid is 5m³/min, with volume 300m³. The injection rate of ordinary gelled acid is 6m³/min, with volume 300m³.

Abstract: This paper mainly studied the influence of starting pressure gradient in CO₂ flooding. The capillary pressure of low permeability reservoir is much larger than the ordinary reservoir, so that the influence of starting pressure gradient can not be ignored. Since CO₂ flooding will be widely used in the development of low permeability reservoirs, it is necessary to study the influence of starting pressure gradient. This paper mainly used Runge Kutta Fehlberg Method and Adams Fourth-order Predictor-Corrector to solve the black oil model, which was founded to study the process of CO₂ flooding. These two methods considered the starting pressure gradient during the CO₂ flooding, and the influence of reservoir permeability and crude oil density were studied by founding black oil model and use these two methods to solve the model. We have compared the production rate with staring pressure gradient and without starting pressure gradient.

Abstract: In order to find out the factors influencing self-suction spraying with pressure gas and water performance, the working principle of the spray was analyzed, orthogonal experiments were conducted, in which influenced of different air flow, bronchia-nozzle distance, nozzle diameter as well as the diffusion angle on the effective rang and spray particle size were tested, the optimal matching of parameters was obtained. The results showed that, the optimal configuration parameters could be obtained by orthogonal test of self-suction spraying with pressure gas and water, to provide data support for the design of efficient spraying device.

Abstract: Analysis of the surface deformation law in mines can provide a significant guide to safety operation of important structures around. For mental mine, field monitoring and simulation are the major methods to study its surface deformation. Chengchao iron mine is a typical mental ore. Taking it as background engineering, the Flac3D is used to simulate its engineering geology condition and mining technology, and study its surface deformation law. It turns out that the simulation results are very close to the field monitoring data. With the mining on, important structures such as ore dressing workshop and new auxiliary shaft will go into the shift line range. It is necessary to adjust the mining program for the safety of the important structures.

Abstract: In the process of polymer flooding in porous media, polymer was detained due to interactions between surface adsorption and polymer molecules, and this could lead to negative effects on oil displacement. For polymer adsorption in Xinjiang conglomerate reservoir, HPLC analysis was adopted to study the static and dynamic laws. Results have showed that the adsorption process could be divided into 3 stages: rapid growth, slow growth and stable state. With the loss of polymer molecular weight, equilibrium adsorption quantity reduces gradually. The adsorption amount is different for the same polymer on four types of oil sands. For equilibrium adsorption, the maximum value is argillaceous sandstone, followed by conglomeratic sandstone.The third is argillaceous gravel, and the minimum is sand gravel. For polymer flooding in conglomerate cores, the dynamic retention amount of seriate conglomerate is much greater than that of fine particle conglomerate. These data have provided reference for project design of polymer flooding in conglomerate reservoir.

Abstract: This article from the permeability condition, half-rigid base type, material requirements, penetrating agent and emulsifier choice, permeation resistance, etc., through the analysis of the factors affecting the permeability of permeable layer of emulsified asphalt, and guided by the factors above, we developed and prepared a new high permeability permeate layer emulsification asphalt, the tests showed that it has good permeability.

Abstract: Based on complex adaptive systems (CAS) theory, using the method of case studies to explore the Shaanxi Province magnesium industry cluster knowledge innovation behavior. Based on the complexity stimulus—response rules, build the knowledge innovation system of metallic magnesium industry cluster main body behavior patterns; Based on complex adaptive - learning, building the overall behavior pattern of magnesium metal industry cluster knowledge innovation system; and based on the complex level—emerge theory, build the magnesium industry cluster evolution behavior pattern of knowledge innovation system. Use CAS theory to solve the problem of knowledge innovation in industrial cluster, which offers a basis for realize the sustainable and health development of industry cluster better.

Abstract: Current specification, does not specify the full construction process. In practice, the majority of construction units according to their own experience, hard to get reliable assurance of construction quality. In the early development of new and the high permeability type layer-penetration oil on the basis of construction of the test section of this article relies on permeable layer, oil on high permeable layer construction process, quality testing, and control indicators complete process was studied, test construction and achieved good results.

Abstract: Domestic and foreign road construction for many years of practical experience shows that pavement early damage and between the base and the surface layer of oil related to the quality of construction, the quality of life of the future road surface layer has a major influence^[1]. In order for the preparation of high-permeable dialysis oils heavy investment in production, combined with permeable layer of oil in the production of enterprises, taking into account the conditions and existing equipment of enterprises, the paper layer on oil production, put forward the requirements for equipment, processing parameters, control indicators.

Abstract: In this paper, the effect of citric acid on the hematite was studied and the mechanism was analyzed. The results indicated that under the condition of the optimal grinding medium, compared with the result without citric acid added, with citric acid added at the mass of 0.10% of the hematite, the content of-0.074mm of grinding production was increased by 7.11%; physical adsorption and chemical adsorption which were on the surface of hematite produced by citric acid can reduce viscosity of grinding pulp, change surface potential of the hematite, and reduce the hardness on the surface of the hematite. Therefore citric acid can improve the grinding efficiency of the hematite.