Advanced Materials Research Vols. 1092-1093

Abstract: Remote sensing image interpretation is one of the commonly methods to extract saline-alkali land. But it can only extract saline-alkali land of unused land, can not divide the types of slightly saline-alkali land, moderately saline-alkali land and severely saline-alkali land. On the basis of remote sensing image interpretation of 2010, the paper calculated the relationship between saline-alkali land degrees and the normalized difference vegetation index (NDVI), elevation, soil type, groundwater, river, urban expansion. Use AHP and Delphi to assign weights, calculate values, and overlay the layers, then concluded the degrees of saline-alkali land.

Abstract: Along with the development of tourism, regional choice of traveling activities turns out to be diversified. Rural tourism has become more and more popular among the tourist mainly from urban area and affect the land use in rural area obviously. Due to the coarse and incomplete data limitations, traditional GIS technique such as RS analysis cannot play a very good role in rural land use research. Based on the explanation as series of interrelationships between spatial entities with the characteristics of social relations, network analysis is considered as a useful method to describe the change and structure of land use affected by tourism in rural area.

Abstract: This paper uses Qishan National Forest Park as a sample to apply step analysis and cluster analysis on 14 attractions in this park by GIS spatial analysis function. To be more exact, based on planar space theory, visibility, continuity, clarity, comfort and other six factors were selected to be analyzed. Results provide that one attraction has the best landscape resource, six attractions own better landscape resource, two attractions is general and five spots are poor. The results are used to verify the feasibility of landscape visual assessment model which is based on GIS technology. Furthermore, this would also provide technical support for the visual landscape assessment of forest park.

Abstract: This paper introduce a new method for extracting internal wave parameters from SAR image. The surface current induced by the internal wave is simulated according to the KDV equation. Then the radar cross section induced by the internal wave can be calculated. The wind speed and pycnocline depth are modified using the dichotomy method step by step which causes the simulation radar cross sections close to those measured from the SAR image. Finally, both the wind speed and pycnocline depth can be obtained. This method is tested on the example of an SAR image. The simulated internal wave signal is consistent with the radar cross sections of SAR images. Their correlation coefficient is up to 90%, which indicates that this method is convergent and applicable.

Abstract: As 2# and 3# coal in Baoxin coal mine are close distance coal seams, combined mining is adopted to ensure the production, and reasonable staggered distance needs to be determined between the upper and lower adjacent workfaces. Calculated on the influence of strata movement, there is a empirical formula for the coal’s alternate distance.It is necessary to analyze the factors in the formula

Abstract: The evaluation of inter-well correlation is an important basis which can instruct engineers to analyze reservoir water-flooding effect, propose the adjustment suggestion. To solve the difficulties of water-flooding evaluation of carbonate reservoir, a new method is proposed based on inter-well connectivity and unascertained math. Firstly, an independent evaluation index system is established before calculating the comprehensive evaluation index weights by the analytic hierarchy process and similarity weight method. Then the Uncertainty measure model is established to evaluate water-flooding effect of well group. This method has been applied in the X oilfield, and good results are gained. The results show that different adjustments should be taken to improve water-flooding effects in different units.

Abstract: The actual tailings dam as an object, analyzes on tailings dam of the different slope ratio, which under earthquake dynamic response characteristics and stability. The results show that, with the increase of the tailings dam slope than the maximum relative displacement becomes larger, the absolute acceleration amplification factor decreases. In the same slope ratio, the tailings dam displacement and maximum acceleration dam piled high with increased accumulation becomes larger. Sand soil absorption of seismic waves of high frequency, low frequency component.

Abstract: Shale gas exploration and development in alleviating energy supply pressure, and low carbon economy development and adjusting and optimizing the energy structure has the effect which cannot ignore. As the north American shale gas exploration and development of the huge success, the domestic study of shale gas is also rapidly developed. So to understand shale gas geology difference at home and abroad, from accumulation mechanism, geological characteristics, the exploration method of shale gas geological theory has carried on the summary and analysis of the system. Contrast the research progress of north American shale gas, and the problems existing in the analysis in the study of shale gas in China, to select the most conducive to China's shale gas exploration and development methods. In this way it can make the success of shale gas development in China become a reality as early as possible.

Abstract: JI006 block is a key blocks of improve productivity in the JI7 well area. This blocks development of well after fracturing,the fracturing effect are different. To further improve the block after the fracturing effect,should focus on the analysis of influence factors of productivity after fracturing. But have different influence factors and influence degree. In order to analyze the influence of various factors on the Fracturing effect influence degree. This paper uses the grey correlation analysis method to the JI 006 block 15 fracturing Wells formation parameters and fracturing parameters influence after the pressure effect is analyzed,To determine the factors influencing the Fracturing effect. Analysis results is more accurate, the method to choose well layer and the fracturing design and construction has certain guiding significance.

Abstract: The Ordovician fissure-cavern carbonate reservoirs of Tarim Basin have relatively large production thickness, long completion intervals and serious heterogeneity problems, former studies about physical parameters for fractured intervals of acid fracturing cannot be well presented through mean algorithm method. This paper uses mean square deviation method to acquire the values of the main influencing factors of acid fracturing, then optimizes the physical characteristics of the fractured intervals. The BP neural network simulation has been adopted to get the optimal BP neural network structure model. In Tarim, this study has simulated 20 wells before acid fracturing using the decision software which compiled by the optimum neural network construction. Comparative analysis has been made through application examples, the coincident rate of mean algorithm is 75%, compared with the 90% of mean square deviation method. Therefore, during the target selection for acid fracturing of heterogeneous carbonate reservoirs with long open hole intervals, it’s significant to use mean square deviation method to optimize physical parameters of reservoirs.