Advanced Materials Research Vols. 734-737

Abstract: The Guangyuan area is located in the northern section of the Longmenshan fault zone, with strong tectonic activity, complex and changeable strata, low level of exploration and complex development status of shale. Through such means as field sample collections, section measurements and indoor organic geochemical experiments, gas content tests and physical characteristics test of Shale, critical data, such as the depth (1000-2000m), thickness (30-50m), organic geochemical indicators and gas content (1.55 m³/t) of shale in the study area, have been determined. Based on the study of tectonic movements and depositional environment in the region, combined with the rule of shale gas reservoirs formed by rich aggregation, favorable area for shale development in the study area has been identified with the method of multi-factors superposition.The favorable area is located in southeast of Guangyuan area and the area is approximate 300km² .

Abstract: The potash resource in China is in shortage for a long time and the production of potassium salt fertilizer is insufficient. In order to fulfill the demand of potash, the scale of prospecting should be enlarged and the saline lakes are important resources for potash. In this paper, potash resource situations in China was analyzed and Yiliping saline lake was taken as an example to analyze the area characteristic, potash resource reserves and economic benefit prospects. With contrasting and analyzing all relative data, the results show that more potash resources should be developed to meet the demand and the reserve of potash resource of Yiliping saline lake is huge and the market environment is reliable and comparatively stable, which means Yiliping saline lake can be invested and developed in large scale.

Abstract: Aimed at difficulty of conglomerate in Ying-4 Section of Xingcheng Gas Field, Songliao Basin, which it is impossible to be carried out, using routine granularity analysis methods, and the iconic grain-size analysis is carried out. According to iconic two-dimension grain-size analysis, and contacting to fundamental sedimentary characteristics of conglomerate, sedimentary environment analysis is carried out. It is thought that this area is Shallow gravel-bed braided fluvial fan deltas, to braided fluvial delta transition, which supported an important geological foundation for the next disposition of exploration in Xingcheng Gas Field.

Abstract: In order to extend the life of enterprise, solve conflicts about mine connection and promote the sustainable development of coal enterprise，paste filling is adapt to the mine under buildings in Jiaozuo coal group zhucun and the observation station of ground movement is laid out. Through the analysis of observational data, the regular of the movement and deformation of the surface is found under the geological and mining conditions, which provides the technical basis for coal mining under other similar conditions. It has the important theoretical value and practical significance.

Abstract: The target layer of study area belongs to delta front and shallow shelf deposition, and the sedimentary formation is sandstone and mudstone thin interbed, the limy developed in sand layer. To make the inversion data reflect the characteristics of reservoir accurately, the methods of limy separation analysis by drilling and forward modeling have been used in this paper, and removed the limy from seismic data according to the characteristics of wave impedance（limestone hollow-out）. According to the research of limestone hollow-out Inversion, delta front sand bodies developed in the J2 formation of H district, and the J2 formation of H district where it is in the west of the study area, a gravity flow channel in the center, shallow shelf sand ridge sand bodies mainly developed in the eastern; delta front sand bodies developed in the J1 formation of HD district, which includes underwater branch channel sand body. A number of lithologic traps have been found and optimized by the research of Retrieval data near the large fault and ramp region, and also have achieved the intended purpose. This inversion method is a kind of reservoir prediction method based on seismic, geological and logging, which added in forward modeling techniques, and is an extension of Model seismic inversion method, and also Provided a new approach for reservoir prediction of the special lithological developed zone.

Abstract: This paper reviews research on assessment of rare earth (RE) supply and demand relationships in recent decade from four study fields: (i) criticality assessment of RE supply risk, (ii) RE projects risk assessment and effect on the global RE supply-demand pattern, (iii) RE international pricing power, and (iv) China's RE trade policies. The study results serve as a stepping stones for the additional research on this issue. At last, some research agendas are proposed respectively from study fields, objects, and assessment methods.

Abstract: In waveform classification for which abundant seismic data are fully used, neural network algorithm is applied to compare and classify the actual seismic waveforms by traces for one specific formation, so as to delineate the lateral variation of seismic signal in details and thus acquire the seismic facies maps corresponding to geologic characteristics. Moreover, through analysis of drilling data, logging data and depositional facies, the depositional facies belts are further divided for formation and lithologic reservoir prediction. Carbonate reservoir in the Central Block in the east margin of Pre-Caspian Basin is discussed as an example to introduce the application of waveform classification and depositional facies demarcation in the Carboniferous Carbonate reservoir. Favorable reservoir beds are also predicted, contributing to a big breakthrough for risk exploration in this area.

Abstract: The main ore structure of the deposit include: disseminated structure, emulsion droplet-like structure, banded structure, vein-like structure, the massive structure, brecciated structure, etc.; The main ore texture include: crystalline granular texture, the replacement texture, solid solution separation texture, interstitial texture, etc. According to the ore fabric characteristics and metal minerals and gangue mineral combination, type and shape since the degree and mineral in space analysis of characteristics of the relationship, the mining area can be roughly divided into three periods: sedimentary diagenesis stage, the initial formation of the sources, hydrothermal reformation metallogenic stage and supergene stage. It was considered that Luziyuan Pb-Zn polymetallic deposit is the hydrothermal deposits for early deposition, the late hydrothermal transformation.

Abstract: The Ordos Basin is the richest area of coal resources in China, which has an important position in China's coal resources prospecting and exploitation. Through the application of coalfield geology and geodynamics, this paper analyzes the distribution of coal resources of the Ordos Basin. It carries out the research in coalfield tectonic zoning, and the coal-bearing area is divided into five coal-bearing areas and four coal tectonic belts. The study of coal resources and tectonic division will contribute to the new understanding of the prediction and evaluation of coal resources of the Ordos Basin.

Abstract: Currently, with a sharp increase in demand for natural gas and a strict energy supply circumstances, the development of tight sand gas becomes a pressing need for the rapid development of Chinas society and economy. At the end of 2010, the reserves and annual production of tight sand gas in China accounted for 39.2 percent and 24.6 percent of national natural gas, respectively, and the proportions are expected to increase. Compared with other unconventional gas such as shale gas and coal bed methane, the techniques of tight sand gas are relatively mature and development costs of it are relatively low. So tight sand gas should be considered in priority in the exploration and exploitation of unconventional gas in China. The total reserves of tight sand gas in China are 12 trillion cubic meters. Tight sand gas in China possesses the rich reserves and enormous potential to develop, which can ease the current shortage of energy. Besides, China has mastered a series of key techniques such as the well drilling and completion protection supporting technique; well completion and staged fracturing technique of horizontal well, which guarantees the technical feasibility of the development of tight sand gas reservoirs. From the perspective of market, social and environmental meaning, reserves, technique and economic feasibility, this paper presents a systematical analysis about the importance of developing tight sand gas in China.