Advanced Materials Research Vols. 356-360

Abstract: To solve the problem of huge investment and high difficulty of individually treating landfill leachate, the experiment adopted A²O simulated wastewater treatment plant to treat landfill leachate combined with municipal sewage.Under the conditions of 11h HRT, 1.0-2.0mg/L DO concentration, 200% mixture reflux proportion, 80% sludge reflux proportion and 20d sludge age, adding langdfill leachate to municipal sewage with the proportion of 1:1500, 1:1000 and 1:600, the effluent concentration can achieve the first order A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. When the proportions come to 1:400 and 1:200,the effluent quality can’t reach the standard. After a comprehensive consideration of water quality and landfill leachate treatment amount in practice, we can draw a conclusion that the 1:600 proportion is the most suitable one of adding landfill leachate to municipal sewage.

Abstract: The pollen–ovule ratios, pollen fertility rate, pollen viability and longevity, pollen histochemistry of Calligonum mongolicum flowers were determined in the field by the middle reaches of Heihe River. The main results were as follows: Calligonum mongolicum is completely fertile and has starchy pollen. Anthers matured heterotypically. The pollen longevity was about 10h. The pollen viability was higher than 70% at the beginning of anthesis on sunny days. No difference in the pollen production of single anther was found between different flower morphes, but significant difference was in that of single flower. The pollen-ovule ratios of different morph flowers were 1625±125, 1750±177, 1500±102, 1563±120, 1875±72. Pollen–ovule ratios (P/O) reveal that C. mongolicum is facultative autogamous.

Abstract: Based on the background of construct the national grain strategy project of Henan province core and construct Zhongyuan Economic Zone, considering the Henan province's cultivated land resources use efficiency and food security, using multiple linear regression model to analyze the cultivated land resources’s use efficiency between 1999-2008 of Henan province, drew this decade, cultivated area remain basically stable, cultivated land utilization overall efficiency is high, and established the food production, even in successive years grain output reached a high yield, population density, urbanization rate, per capita GDP, multiple crop index, per hectare fertilizer rate is the greatly influenced factors of influence cultivated land resource utilization efficiency. Finally, proposed to improve the cultivated land resource utilization efficiency of Henan province and rational utilization of cultivated land resources countermeasures.

Abstract: Abstract. Beizhong Oilfield is one of the hydrocarbon enrichment zones in Hailar Basin, whose key layer Nan1 Formation mainly develops fan delta sedimentary type. On the basis of fine stratitraphic framework, this paper firstly analysized the petrologic characteristics of fan delta, and through observing and describing of coring wells, combined with the features of logging and sesmic facies, then identified and illustrated the main sedimentary microfacies characteristics of fan delta front of Nan1 Formation in study area. Based on the above, the sedimentary model of fan delta in study area was established. Finally, the reservoir characteristics of fan delta was analysized and summarized from the study of reservoir space type, sandstone patterns and superimposed styles.

Abstract: On Lower Yangtze region source rocks of Permian and the Lower Triassic activation energy distribution suggests that source rocks experienced some hydrocarbon generation reaction, generally high activation energy mainly because of high maturity, the weighted average activation energy has good positive correlation with maturity. The time of hydrocarbon generation in Huang Qiao area is short, and it’s speed is fast; the time in Ju Rong area is longer, characteristics is prone to early and multi-period; source rocks in Chao Hu region been uplifted to surface, the thermal evolution is lowest of all, and the time is longest. Source rocks secondary hydrocarbon generation exists in many area in Lower Yangtze region, the degree of hydrocarbon generation is mainly depend on sedimentary burial history.

Abstract: Based on the identification of rock slice and cast thin sections, the observation of scanning electron microscopy, the technology of high pressure Hg injection and X-ray diffraction analysis of clay minerals, the Siegenian Formation reservoir in Devonian, X block, was evaluated and classified. The reservoir is a tight sandstone reservoir with relatively poor porosity and low permeability and it is divided into three types: mesopore-ultra low permeability reservoir (type I), low-middle porosity-ultra low permeability reservoir (type II) and low porosity-ultra low permeability reservoir (type III). The type II is the main reservoir in this area. The conclusions are useful for the petroleum exploration in future.

Abstract: The diversity of coal basins and the late intensive reformation of coal regulations are the remarkable characteristics of Chinese coalfield geology. These largely determine the searching orientation and value of coal exploitation and utilization. The coalfield structure research is one of the basic works and core contents in potential evaluation of national coal resources. In this paper, new thought of carry out coalfield structures research in potential evaluation of coal resources is introduced. The main research contents can be summarized in several aspects, including regional geological setting, structural shape and distribution regularity, tectonic origin and evaluation, structural control of coal. It briefly summarizes the working emphasis of coalfield structures research in different occurrence region of coal in our country.

Abstract: With comprehensive utilization of drilling, logging and seismic data, research was conducted on the sequence stratigraphic models of Jiufotang Formation, Lower Cretaceous in the Luxi Sag, Kailu Basin. It was revealed that Jiufotang Formation could be divided into one three-order sequence, which including lowstand systems tract (LST), transgressive systems tract (TST), highstand systems tract (HST) and regressive systems tract (RST). Within the sequence, it developed five types of sedimentary facies, which were nearshore subaqueous fan, braided river delta, meandering river fan, turbidite fan and lacustrine facies, respectively. The LST mainly developed nearshore subaqueous fan, the TST mainly developed meandering river deltas while the HST and RST mainly developed meandering river delta, braided river delta and nearshore subaqueous fan. In addition, turbidite fan developed in all four systems tracts. Two types of sequence stratigraphic models developed: short-axis model and long-axis model.

Abstract: Abstract. Domestic oil-gas fields are almost approaching production tail, and an increasing number of non-traditional oil-gas reservoirs are encountered during the process of exploratory development, which leads to a urgent requirement for an advanced method in that conventional methods, such as cross plot and multiple linear regression cannot precisely describe such complex oil-gas reservoirs. Thus, the main purpose of this paper is to come up with method of Decision Tree as final model for identification of reservoir fluid based on the comparison of advantage and disadvantage of fours methods, including Decision Tree, Support Vector Machines, Artificial Neural Network and Bayesian Network. In sum, data mining is a prospective applied method in oil reservoir geology.

Abstract: Crack universally existing underground is an important kind of pores. In order to study the elastic wave propagation in fractured medium through experiment, a new method to make artificial core with certain cracks using oil well cement and camphor sheet or thin steel sheet is put forward. Geometric parameters of the crack, such as shape, size and aspect ratio, are approximately equal to that of camphor sheet or thin steel sheet. Using the thin steel sheet to make crack can be more easy and accurate to control the crack angle than using camphor sheet. The crack opening scales at millimeters. The aspect ratio of cracks formed by camphor sheet ranges from 1.4 to 8, and aspect ratio of cracks formed by thin steel sheet ranges from 2.5 to 70. This method is proved simple and feasible by experiment practice, which can provide artificial cores with certain crack for acoustic wave propagation study.