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矿物学报 2009年第S1期29卷 70-70页

作者： LIU Yong-kun1,ZHOU Jia-xi2.HUANG Zhi-long2.WANG Jing-song1,YANG De-zhi1,3.DING wei2.CHEN Yuan-xing1,BAO Guang-ping2.1. The 102.geological Team,Guizhou Bureau of Exploration and Development of Geology and mineral Resources,Zunyi 563.03.{2. 2. State key Laboratory of Ore Deposits Geochemistry,Institute of Geochemistry,chinese Academy of Science,Guiyang 550002.{2. 3. china University of Geosciences(Wuhan) ,Wuhan 43.074,{2.)

The Zaibian mafic-ultramafic rock is located in the transitional zone of the Yangtze craton and south china fold system,where is the southwest of Jiangnan orogenic belt(Zeng et al.,2.03.Wang et al.,in press).

关键词： Pb rock Lead Isotope and rock Geochemistry of Zaibian Mafic-Ultramafic rock,Southeast Guizhou Province,{2.

Discussion on the exploration strategy of Developing china's Natural gas

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天然气工业 1996年第1期16卷 101-105页

作者： Kang zhulin~* Zhai Guangming (Consulting center of china {2. Petroleum Corporation) Liao Siwei

Gas resources in china arequite abundant,on the basis of 2.dround nation-wide oil-gas re-sources’ estimation result,the to-tal gas resources amount is 58.04trillion m~3. ranking in the 10thplace of the world ,in which the to-tal resouces amount on land is2..9 trillion m~3. that off shore is8.14 trillion m~3. But the gasproved degree in china is quite low at present. Emphasis is put on the elucidation of strategyin expanding our exploration from certain geologi-cal aspects and gas exploration in some new re-gions is approached in this paper.

关键词：天然气工业能源工业 rock

Observation of ultra-microtexture of fault rocks in shearing-sliding zones

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Progress in Natural Science:Materials International 2005年第5期15卷 430-434页

作者： SUN Yan1*, LU Xiancai1, SHU Liangshu1, GU Lianxing1, ZHU Wenbin1, GUO Jichun1 and LIN Aiming2.1. State Key Laboratory of mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 2.0093.{3. 2. Department of Geosciences, Shizuoka University, Shizuoka 83., Japan) State Key Laboratory of mineral Deposits Research Department of Earth Sciences Nanjing University Nanjing 210093 China Department of Geosciences Shizuoka University Shizuoka 836 Japan

Based on scanning electronic microscopic observation of three fault rocks in ductile-brittle shearing-sliding zones (including one palimpsest mylonite sampled from deep bore cores of Cajon Pass, California, two flowing-structured carbargillites sampled from Shaancan Well 1 located in north Shaanxi, and Well NH located in Huanghai, respectively), micron- and nanometer-scaled ultra-fine grinding grain texture of fault rocks is discovered in this study. And the {2. significance of grinding grain texture is discussed in terms of its particulate organization, rheology of particulate slipping, laminar petrography and micro dynamics including dynamothermal metamorphism, fluid transferring, particulate autorotation, and so on. In addition, the remaining problems to be solved and broad prospects in this new study field are also discussed.

关键词： ductile-brittle shearing zone fault rock texture of grinding grain rheology of particulate slipping.

Clay rocks around Permian-Triassic Boundary at Daxiakou Section in Hubei Province,china

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Journal of Earth Science 2009年第6期20卷 909-920页

作者：张素新袁鹏赵来时童金南杨浩于吉顺史玉芳 State Key Laboratory of geological Processes and mineral Resources China University of Geosciences Faculty of Earth Sciences China University of Geosciences State Key Laboratory of geological Processes and mineral Resources China University of Geosciences

We studied the clay rocks around the Permian-Triassic boundary at the Daxiakou （大峡口） Section in Xingshan （兴山）, Hubei （湖北） Province, china. All clay rocks are predominated by illitemontmorillonite （I/M） mixed-layer {3.s, and high-temperature hexagonal bipyramid （HB） quartz and pyrite are contained in different abundances. Clay microspheres are even found in some beds. The results show that volcanic activity was very frequent in this area or in the neighboring areas during the Permian-Triassic transition though the intensity of eruption and the position of the eruption center might have varied during the period. The frequent volcanic activity should be at least one of the leading events to cause the momentous turnover of biota and the ecosystem during the great Permian-Triassic transition.

关键词： volcanic activity Permian-Triassic boundary Daxiakou Section Hubei Province.

The Forecasting and Warning System of geological Disasters in china

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Engineering Sciences 2004年第3期 30-35+47页

作者： Yao Xuexiang 1,2. , Xu Jing 1,3. (1.Nanjing Institute of Meteorology,Jiangsu Nanjing 2.0044 2.Tianjin Meterological Bureau,Tianjin 3.0074 3.{3. Meteorological center,Beijing 100081)

geological disasters such as landslide and mudslide can be caused by many factors. Collaborations among different governmental agencies and multi-disciplines are necessary to establish a forecasting and warning system of geological disasters (FWSGD). A FWSGD in{2. has been in operation since June 1, 2.03.as a joint project between the{2. Meteorological Administration (CMA) and the Ministry of Land and Resources (MLR). This system has successfully shown very good social and economic benefits. The temporal-spatial distribu- tions of{2. geological disasters and their causes have been analyzed in this paper. The FWSGD is described and its possible existing issues are also discussed. Authors suggest a new approach to study these disasters from interactions of the earth systems. Finally, a monitoring, forecasting, warning and preventing system for geological disasters in{2. is proposed.

关键词： geological disasters mudslide landslide forecasting and warning system

Moment tensor analysis of the acoustic emission source in the rock damage process

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Progress in Natural Science:Materials International 2005年第7期15卷 609-613页

作者： YU Huaizhong, ZHU Qingyong, YIN Xiangchu and WANG Yucang ( State Key Laboratory of Earthquake Dynamics, Institute of Geology, china Earthquake Administration, Beijing 10002., china State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, {2. Academy of Sciences, Beijing 100080, china School of Mathematics and Computational Science, Zhongshan University, Guangzhou 5102.5, china center for analysis and Prediction, china Seismological Bureau, Beijing 10003., china Quakes, Department of Earth Science, University of Queensland, Brishbane, Austrialia) State Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing 100029 China. State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China. School of Mathematics and Computational Science Zhongshan University Guangzhou 510275 China. center for analysis and Prediction China Seismological Bureau Beijing 100036 China. Quakes Department of Earth Science University of Queensland Brishbane Austrialia

To further investigate the mechanism of acoustic emission (AE) in the rock fracture experiment, moment tensor analysis was carried out. The AE sources characterized by crack sizes, orientations and fracture modes, are represented by a time-dependent moment tensor. Since the waveforms recorded by AE monitors correlate to the moment tensors, we prefer to select the P wave amplitude from the full-space Green's function of homogeneous and isotropic materials to determine the six independent components of the moment tensor. The moment tensor analysis was used to investigate the AE sources recorded in the experiment, and three types of micro-cracks were found, which are tensile mode, shear mode and mixture of the tensile and shear mode. In addition, the motion of micro-cracks was decided by eigenvectors of moment tensor. Results indicate that the moment tensor analysis may be used as a measurement to reflect the damage evolution of rock specimen.

关键词： moment tensor acoustic emission rock fracture.

Constraints on the Archean atmospheric oxygen and sulfur cycle from mass-independent sulfur records from Anshan-Benxi BIFs, Liaoning Province, china

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Science china Earth Sciences 2007年第10期50卷 1471-1478页

作者： HOU KeJun1,2. LI YanHe1,2. & WAN DeFang1,2.1 Key Laboratory of Metallogeny and {3. Resource Assessment, Institute of {3. Resource, {2. Academy of geological Sciences (CAGS), Beijing 10003., china 2.Key Laboratory of Isotope Geology, CAGS, Beijing 10003., china 1. Key Laboratory of Metallogeny and mineral Resource Assessment Institute of Mineral Resource Chinese Academy of Geological Sciences (CAGS) Beijing 100037 China 2. Key Laboratory of Isotope Geology CAGS Beijing 100037 China

The Archean atmospheric oxygen concentration and sulfur cycle was long debated. The banded iron formation (BIF) is a special type of the sedimentary formation, which has truly recorded the atmospheric and oceanic conditions at that time. In this study, the composition of multiple sulfur isotope (δ 3.S/δ 3.S/δ 3.0}) for sulfides bedded in the Archean (~2.7 Ga) BIFs, in Anshan-Benxi area of Liaoning Province has been measured. The value of △3.S varies from -0.89‰ to +1.2.‰, which shows very obvious mass-independent fractionation (MIF) signatures. These non-zero △3.S values indicate that the Archean sulfur cycles are different from what it is today, which have been deeply influenced by gas phase photochemical reactions. Algoma-type BIFs which are closely related to the volcanic activity have negative △3.S value, however, Superior-type BIFs which are far away from the volcanic {3. have positive △3.S value. The δ 3.S varies in a large range from -2..0‰ to +11.8‰, which indicates that the bacteria reduction activity has already existed at that time, and that the oceanic sulfate concentration has at least reached 1 mmol/L in local areas. Combined with the contemporaneous existence of the hematite, magnetite and the occurrence and preservation of the sulfur MIF, it can be inferred that the Archean atmospheric oxygen level must be at 10-2.10-3.of the present atmospheric level (PAL).

关键词： sulfur mass-independent fractionation, Anshan-Benxi area, BIF, Archean atmospheric oxygen level, Archean sulfur cycle

THE PRESSURE TRANSIENT analysis OF DEFORMATION OF FRACTAL MEDIUM

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Journal of Hydrodynamics 2008年第3期20卷 306-313页

作者： ZHANG Yi-gen TONG Deng-ke Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Research Institute of geological Sciences Shengli Oilfield Company Sinopec Dongying 257015 China School of Mathematics and Computational Sciences China University of Petroleum （East China） Dongying257061 China

The assumption of constant rock properties in pressure-transient analysis of stress-sensitive reservoirs can cause significant errors in the estimation of temporal and spatial variation of pressure. In this article, the pressure transient response of the fractal medium in stress-sensitive reservoirs was studied by using the self-similarity solution method and the regular perturbation method. The dependence of permeability on pore pressure makes the flow equation strongly nonlinear. The nonlinearities associated with the governing equation become weaker by using the logarithm transformation. The perturbation solutions for a constant pressure production and a constant rate production of a linear-source well were obtained by using the self-similarity solution method and the regular perturbation method in an infinitely large system, and inquire into the changing rule of pressure when the fractal and deformation parameters change. The plots of typical pressure curves were given in a few cases, and the results can be applied to well test analysis.

关键词： stress-sensitive reservoir fractal permeability modulus pressure analysis

Effect of stress sensitivity on displacement efficiency in CO_2.flooding for fractured low permeability reservoirs

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Petroleum Science 2009年第3期6卷 277-283页

作者： Wang Rui Yue Xiang＇an Zhao Renbao Yan Pingxiang Dave Freeman Key Laboratory of Petroleum Engineering Ministry of Education China University of Petroleum Beijing 102249 China SINOPEC Exploration ＆ Production Research Institute Beijing 100083 China china Power Complete Equipment Co. Ltd. Beijing 100011 China Edwy R. Brown Department of Petroleum Engineering Marietta College U.S.A.

Carbon dioxide flooding is an effective means of enhanced oil recovery for low permeability reservoirs. If fractures are present in the reservoir, CO2.may flow along the fractures, resulting in low gas displacement efficiency. Reservoir pore pressure will fluctuate to some extent during a CO2.flood, causing a change in effective confining pressure. The result is rock deformation and a reduction in permeability with the reduction in fracture permeability, causing increased flow resistance in the fracture space. Simultaneously, gas cross flowing along the fractures is partially restrained. In this work, the effect of stress changes on permeability was studied through a series of flow experiments. The change in the flowrate distribution in a matrix block and contained fracture with an increase in effective pressure were analyzed. The results lead to an implicit comparison which shows that permeability of fractured core decreases sharply with an increase in effective confining pressure. The fracture flowrate ratio declines and the matrix flowrate ratio increases. Fracture flow will partially divert to the matrix block with the increase in effective confining pressure, improving gas displacement efficiency.

关键词： Stress sensitivity flowrate distribution matrix fracture CO2.flooding displacement efficiency