Advanced Materials Research Vols. 998-999

Abstract: A Modified Cam-Clay Model and finite element methods (FEM) are used in this paper to analyze the deformation and settlement of red clay foundation. The results show: (1)The deformation of oil tank foundation calculated is close to that measured and the effect of geometric nonlinearity is small. (2) Geometry of loading and level of stress have important effects on the deformation behaviors of red clay foundations. In practice the result of elastic-plastic FEM is much better than that of classical calculated methods (CCM).

Abstract: Based on the successful practice of Puguang gas field, in 2006, Well Yuanba 1 was drilled in northeastern Sichuan by SINOPEC, obtaining the gas flow of 503,000 m³ per day in reef-shoal reservoirs in Changxing Formation. This announced the discovery of Yuanba Gasfield. Yuanba Fasfield is a lithologic gas pool with characteristics of: high H₂S content while normal pressure, weak tectonic deformation, deep burial, etc. Yuanba Gasfield is the deepest marine gas fields in Sichuan Basin, the middle of the gas pool reaches the average burial depth of 6,600 m. Reservoirs mainly developed in the Changxing reef-shoal facies with the large scale and good reservoir quality. The reservoir formation was controlled mainly by early meteoric dissolution and dolomitization, while deep dissolution and tectonics contributes a little.

Abstract: Recently, the position of shale gas is more and more important in the world energy structure. The lithology of Xiamaling Formation in Beijing area mainly include siltstone, silty shale and shale. The organic carbon content is relatively high, averaging 2.28%. The kerogen type of organic matter is dominated by II₁ and II₂ types, and thermal evolution level is relatively high, averaging 2.05%. Intergranular micropore is well developed, and most of the micropore diameter is 1-7µm, so the reservoir condition is good. The content of the brittle mineral is relatively high, so it can be easily fractured in production. The content of the clay mineral is relatively high, so it has a good adsorption capacity. Through wild prospecting and geochemical analysis for samples, this paper systematically assesses the Xiamaling Formation shale in Beijing area, which can provide basic stata for further shale gas study in Beijing area.

Abstract: There are good shales well developed in the study area with significant thickness and stable distribution. The study area is estimated to have a big potential for shale gas. However, the study area experienced three major phases of tectonic events and thus developed severe folds and big faults. From the outcrop study and core analysis information of some old geological wells, the thermal maturity of shale is quite high up to 4%. Graphitization is observed in lower Cambrian which acting as another indicator of high maturity. Study released that this may link to the tectonic evolution (volcanic activities) and deep burial depth. Therefore, the preservations conditions of shale gas in the study area would be a key point for the success of exploration.

Abstract: This subject used oxidizing biocide C, non-oxidizing biocide Y, and J for single, compound screening, and studied killing performance of them used in municipal middle water. Results indicated that the Y worked best, followed by the J, and C the worst; synergistic biocide P best formula was: J 10 mg/L, and Y 5 mg/L, as this P could be effective in controlling microbial growth.

Abstract: Soil nutrient level is an important factor affecting the yield of corn, to find out the effect of nitrogen, phosphorus, potassium on maize yield, analysis of bivariate correlation in SPSS based on the relationship between nutrient content, nitrogen, phosphorus, potassium in the plot and each plot yield directly was analyzed, the experimental results show that it doesn't matter: P, K and the yield of corn, corn yield and nitrogen related.

Abstract: As application of gravity platform is increasing rapidly in marginal oilfields, the heat preservation performance of the submarine oil tank is becoming more and more important in offshore oil storage technology. In order to enhance heat preservation performance of the concrete oil tank to reduce energy consumption, three insulation solutions were proposed in this paper. Contrastive analysis shows that polyurethane solution can not only maximize economic benefits but also possess high engineering feasibility and environmental value.

Abstract: This paper select Ezhen Lake and Caohuhu Lake, which are located in the waterway of Wangyu River, as research objects in order to research the interception and decontamination of total nitrogen, dissolved total nitrogen, particle nitrogen, ammonia, nitrate and nitrite in the lakes and their impact factors. The main results are as follows: The two lake wetlands could remove nitrogen from input watercourse by interception and decontamination, especially particle nitrogen and nitrate. Factors like space shape of lake and the area, hydraulic retention time and the distribution of hydrophyte in wetlands affected the removal rates of nitrogen. This study provides theoretical and technical support for the operation and management of the project of “water diversion from Yangtze to Taihu”.

Abstract: The outer space of city, construction space and underground space are city’s material spaces with disaster prevention function and are direct carriers of disasters, this paper propsoses the concepts and approaches to integrate, recombine and share city spaces based on the current situation of city’s disasters and spaces for disaster prevention, puts forward ideas and concepts including “ active disaster prevention”, “comprehensive disaster prevention”, “evacuation center” combining the latest research development of nanjing city’s comprehensive disaster prevention planning, and conducts deeper research in aspects of improving the disaster prevention function of city space and inspring planning and construction of city disaster prevention.

Abstract: Tight sand gas is one of unconventional gas. Under the condition of the gradual depletion of conventional resources, unconventional resource is gradually paid more attention. Tight sand gas is divided into two types: pre-exiting deep gas and subsequent tight sand gas on the foundation of current research. Different types of accumulations having various characteristics, so describing and contrasting reservoir forming characteristics of two types of tight sand gas, analyze reservoir forming rules, can guide the future work of tight sand gas exploration.