Advanced Materials Research Vols. 989-994

Abstract: The pressed powder sample was determined by Epsilon 5 high-energy polarized energy dispersive X-ray fluorescence (EDXRF) spectrometer. The correlation coefficient of the standard curve method is 0.991 0. The precision is 2.98% and the relative deviation of the measurement standard samples is up to 6.40%, which showed that the precision and accuracy of the method were also good. Simultaneous measurement of seven soil samples with this method and γ-spectrometer were carried, the results of two analytical methods was compared using a paired t-test by SPSS program, which showed that there was no significant difference in the two sets of data. The results predicated that EDXRF could be a potential simple method for analyzing ⁴⁰K in soil samples.

Abstract: Being a close bay, vertical settling was the dominant transfer process of Hg Jiaozhou Bay. Based on the investigation data of mercury (Hg) in bottom waters in Jiaozhou bay in 1979 to 1985 (in absence of 1984), this paper tried to analysis both of the settling processes and settling mechanisms of Hg. Results showed that that Hg in Jiaozhou Bay was settling continually over year, therefore a continued accumulation of Hg contents in bottom waters appeared, especially in spring and summer. Sediments in sea bottom could be both of source and sink of pollutants, especially for persistence pollutants such as Hg. Based on the both of the settling processes and settling mechanisms, the improve of recycle rate and the emission reduction of Hg should be the major pollution control strategies in Jiaozhou Bay.

Abstract: In detailed study on sedimentary characteristics of Fu Yang reservoir around Threezhao area, based on the theory of high resolution sequence stratigraphy of the base level cycle isochronous contrast, regard short-term base-level cycle as the minimum isochronous contrast comparing unit, this paper has carried on the fine high-resolution isochronous contrast of the reservoir in the studied area, and the high resolution^[1] sequence division of different orders of base-level cycle of Fuyu oil layer and Yangdachengzi oil layer. The Fuyu reservoir is divided into one complete long-term base-level cycle and three complete medium-term base-level cycle; while Yangdachengzi reservoir is divided into a long-term base-level rise hemicycles and 3 middle-term base-level rise hemicycles. According to mud logging, well logging and core analysis data, the sands group stratified mark of the Fuyu reservoir has been determined.

Abstract: This design adopts the method of horizontal arrangement to set the aerator pipes because it’s more effective than an upright way. The pipes are divided into two vertical levels. Firstly there should be an excavation of foundation pit or grooves to put the pipes in two levels. Then the pipes in two levels can be set at vertical directions. After burying the pipe the earth should be backfilled into the grooves. When backfilling the lower level groove, we put some certain microorganism to help cleaning the organic pollution. While working, the pipes above are mainly used to manufacturing gas phase concentration difference, letting the organic volatilize and goes into the atmosphere. The pipes in lower level are mainly used to provide oxygen to microorganisms in the soil, so that they can decompose organic and make them into inorganic which is no harm to the soil and ground water.

Abstract: In order to rapid discriminate the source of Fructus Lycii origin, Fructus Lycii from five different areas were collected, the content of K, Ca, Na, Mg, Fe, Zn ,Cu and Mn were analyzed with flame atomic absorption spectrometry,and the data was analyzed with Stepwise discriminant analysis method,and the discriminant function was established. The results showed that Fructus Lycii from five different areas was well clustering. The discriminant model was re-discriminated by using the method of mutual test; its discrimination accuracy was 94.4% for the original samples and the unknown samples. The recognition rates for Ningxia, Hebei, Qinghai cultivation regions were all 100%. In conclusion, mineral element combined with chemometrics method was a fast and accurate method to identify the origin source of Fructus Lycii.

Abstract: Porosity and permeability are two important input parameters in formation evaluation. However, It faces a great challenge for formation porosity and permeability estimation in tight sandstone reservoirs in the Ordos basin of northwest China due to the greater contribution of rock matrix and complicated pore structure. In this paper, based on the analysis of conventional log responses and 324 core samples drilled from the target formations in different wells, the estimation models of reservoir porosity and permeability are established, and the reliability of these models are verified by comparing the calculated porosity and permeability by using the established models with core analyzed results. The absolute errors between these two kinds of porosities are all lower than 0.64%, and the relative errors between them are lower than 7.1%, these are coincided with the requirement of reserve estimation.

Abstract: In order to solve the downhole complex issues such as lost circulation, sticking and well collapse during drilling due to the development of coal-bed and coal seam, thick carbonaceous shale, formation is not homogeneous, the inclination is large, well-developed cracks and other reasons, which constraint exploration and development of oilfield in Huoyanshan tectonic belt region. According to the well instability mechanism of this block and the principle of "Materialized blocking, inhibiting surface hydration, effective stress support" multiple collaborative anti-sloughing drilling fluid, we developed a set of new drilling fluid systems suitable for the Huoyanshan tectonic plate through laboratory experiments. Field test application results show that the new drilling fluid system has a strong capability of salt resistance, anti-calcium and anti-poor soil, has excellent ability of anti-collapse, and has better temperature resistance and crack sealing ability. The new drilling fluid meets the needs of drilling under complicated geological conditions completely.

Abstract: Through systematically geologic survey and observation of drills, this paper have a comprehensive research on Vertical zonation in bauxite deposit of Wuchuan-Zheng^,an-Daozhen (WZD) area. Environment of WZD bauxite in penecontemporaneous period can be divided into two parts: vadose zone and phreatic zone. Vadose zone is oxidized and acidic environment. Phreatic zone is reduced and alkalescent environment. Vadose zone is favorable to mineralization, but phreatic zone is not favorable to mineralization.

Abstract: It is hardly to discovery fossil from the bauxite in Wuchuan-Zheng^, an-Daozhen (WZD) area, northern Guizhou, China. But the new study suggests, containing a small amount of plant debris from massive bauxite in the lower part of the ledge. Preservative features of fossils in WZD bauxite indicates: metallogenetic materials experienced a transport process; sedimentary environment is reduced; fossils only preserved in the massive bauxite, that fossils in other types of ores were destroyed in the late oxidation modification. Metallogenic environment of bauxite has experienced two kinds of state-reduction and oxidation. The lack of animal fossils; bauxite, reveal that the metallogenic environment is acidic, resulting in animal fossils are dissolved and hard to save.

Abstract: Through systematically geologic survey and observation of hand specimen this paper have a comprehensive research on the characteristics of interlayers in bauxite deposit of Wuchuan-Zheng^,an-Daozhen (WZD) area. There are two kinds of interlayers in WZD bauxite: black coaly interlayer and brown hematitic interlayer. Black coaly interlayer indicate reduce and inshore environment, brown hematitic interlayer represent oxidized and strong hydrodynamic environment. The appearance of interlayer with contrary feature indicate sedimentary environment of the WZD bauxite is very complex.