Advanced Materials Research Vols. 347-353

Abstract: The essential oil was obtained at yield of 0.30% by hydrodistillation from fresh leaf tissue of Solidago canadensis L. collected from Zhejiang Province, China. GC and GC/MS analysis identified 46 components, representing 94.6% of the leaf oil. The main components were (-)germacrene D (28.4%), bornyl acetate (9.2%), D-Limonene (5.0%). The essential oil was tested for cytotoxic activities against three tumor cell lines. The inhibitory concentrations of the essential oil at 50% effect level (IC50) were 68.1 μg/ml for SMMC-7721, 71.4 μg/ml for SGC-7901, and 156.9 μg/ml for Hala, respectively.

Abstract: Block B of South Buir Oilfield is located in the Eastern Province of the People’s Republic of Mongolia. Main oil reservoir is pay zoneⅡof L.L.Z (K1n1 II), followed by pay zone Ⅲ of L.L.Z (K1n1III) and pay zone I of L.L.Z (K1n1I). For the purpose of studying the petrological characteristics, physical properties and pore structures of the reservoir of pay zone Ⅱ and Ⅲ of Lower part of Lower ZuunBayan, a large numbers of scanning electron microscopes, thin sections, casting thin sections and well logging data were analyzed. Pyroclastic rock is the main lithology of this area, pores in the L.L.Z are mainly complete intergranular pores, dissolved pores, the formation is a reservoir of lower porosity and permeability to intermediate porosity and medium permeability. Classified evaluation shall be carried out to reservoirs, according to standard of reservoirs classified evaluation, porosity and permeability data of ordinary physical property analysis and mercury injection data analysis, and corresponding mercury injection parameters. Comprehensive evaluation of reservoirs at pay zone Ⅲ is type Ⅲ, reservoirs of pay zoneⅡ is type Ⅱ.

Abstract: This study reviews the current status of the understanding and development of laser shock peening(LSP) on various metals. The influence of processing parameters on residual stresses, microstructure and properties are discussed. Special emphasis is placed on analyzing their underlying interrelationship between the LSP induced modifications. Finally, recommendations for further study are listed. Results indicate that the combination of uniquely flexible process and excellent performance makes the laser shock peening an attractive candidate for surface optimization applications.

Abstract: The flexible metallic cloth was made of mixed powder consisting of WC and organic blend. A brazing coating was obtained through the high temperature brazing of the metallic cloth in vacuum furnace. The anti-corrosion of the brazing coating was investigated by weight-loss method and electrochemical measurements. The surface morphology observation was conducted by the scanning electron microscopy (SEM). The results show that the composite coating has superior corrosion resistance compared with 316L stainless steel.

Abstract: South Buir Sag is located in Tamsag Basin of Mongolia, which is a Mesozoic faulted basin. South Buir Sag shows the distinct characterization of faulted structure: many uplifts and many depressions, depressions alternated with many uplifts. This special structure framework results in the characteristic of multi-provenances, multi-depocencers. South Buir Sag experienced the whole process of Cretaceous basin development. South Buir Sag formed fan deltas-lacustrine system in the period of Tsagaantsav Formation, Lower Zuunbayan Formation which occurred in rifting stage. It developed deltas-lacustrine system during the period of Upper Zuunbayan Formation，Sainshand Formation，Bayanshire Formation which is in rifting-downwarping stage. From the period of Bayanshire Formation to present, South Buir Sag underwent downwarped and developed fluvial system. The sandstone of fan deltas front can provide favorable reservoir for hydrocarbon accumulation. Some regions of structure and deposition matching well can form lithology-structure petroleum reservoir.

Abstract: Longdong Jurassic reservoir is a typical severe heterogeneous reservoir. Water flooding in this area is ineffective owing to water breakthrough and water flush. Laboratory experiments and field application of air foam flooding are described in this paper. Firstly, the air foam agent formula that suitable for Longdong Jurassic reservoir is selected as 0.5wt%HD-6 + 0.15wt%HD-Y by studying the foaming ability, stability and interfacial tension between oil and surfactant solution. The oil displacement results indicate that air foam flooding is more effective than the usage of surfactant waterflooding and air injection considering the amount of acquired recovery factor. In addition, process parameters of air foam flooding are determined by core flooding tests. The gas/liquid ratio is set to 3:1 and the chemical slug size is set to 0.9PV. Based on the experiments, air foam flooding is applied in Maling Block, the performance indicates that this technique can increase injection pressure, improve the injection profile of reservoir, decrease the water cut and improve the oil production.

Abstract: Germany announced on 30 May 2011 that it will shut down all of its 17 nuclear power stations by 2022 (8 of them immediately, the others step by step), which makes Germany become the first developed country in the world that totally give up the nuclear power and fulfill the change of energy structure after the Fukushima nuclear accident in Japan. The paper analyses the political, economic, social and technical aspects of this decision and its consequences for Germany and its possible impact worldwide.

Abstract: Formation damage is prone to occur during drilling into the formations with medium/high permeability in Jabung Oilfield, Indonesia. To prevent formation damage and enhance productivity of oil wells, a novel low-damage drilling fluid was developed on the basis of the modification of currently used KCl polymer drilling fluid using a special technology. By virtue of the synergistic effect of ideal packing agents and film-forming agents, a sealing layer with high pressure bearing capability can be formed on the rock surface of borehole, so as to prevent drilling fluids from invading into formations effectively. It is shown from the results of numerous experiments that this drilling fluid has excellent rheological properties, very low filtration rates (API filtration rate<4mL and HTHP filtration rate≤12.5mL), good lubricity, and strongly inhibitive character to shale. Also, it exhibits remarkable effectiveness of formation protection indicated by the returned permeability as high as 88.11% and extremely low dynamic filtration rate lower than 4mL.

Abstract: A calculation is made for certain Supercritical Water Cooled Reactor (SCWR) using UO₂ fuel and MOX fuel respectively. The results indicate that MOX fuel has a simple power distribution with UO₂ fuel, but there is a larger power uneven factor when using MOX fuel, and using MOX fuel including weapon grade Pu has larger power uneven factor than using MOX fuel including reactor grade Pu. However, in the case of same power distribution, the fuel rod using MOX fuel has a higher temperature than the one using UO₂ fuel. Therefore with the more uneven power distribution, the fuel in SCWR using MOX fuel has a higher temperature. This will result in a big security issue when using MOX fuel in original design of SCWR. Through analyzing the result of power distribution, an improved assembly of SCWR is presented. It can reduce the power uneven factor and increase the security of fuel rod using the improved assembly of SCWR.

Abstract: The presence forms of sulfur in High-sulfur petroleum coke and high temperature transfer was studied in this paper. It was found that a part of sulfur escape in the form of gaseous compounds through heating coke without air. The present structure of sulfide is inferred to be thiophene according to XPS spectra. The scientific calculation for amount of high sulfur petroleum coke can be continued according to the sulfur content of petroleum coke, sulfur transfer agent and permissible content of sulfur in the coke. The gaseous sulfur caused by the high sulfur petroleum coke which is directly used as boiler fuel and coal blending can be recycled through the original sulfur purification recovery system, meanwhile, the purification load rises.