The Pan-1 coal mine located in Huainan municipality, Anhui province, is abundant in coal resources. In order to discover the natural conditions of gas in its coal seams, we inverted the burial history of these coal se...The Pan-1 coal mine located in Huainan municipality, Anhui province, is abundant in coal resources. In order to discover the natural conditions of gas in its coal seams, we inverted the burial history of these coal seams using the software of Easy%Ro method and simulated the development process of gas volumes and pressure of the major coal seams using CBM History Simulation Software. Our analysis shows that the devolution of gas volumes and levels of pressure can be divided into four stages: i.e., a biogas stage (P1-P3), a pyrolysis gas stage (T1-T2), an active gas enrichment stage (T3-K1) and a gas dissipating stage (K2-present). Currently, the average amounts of gas and gas pressure in coal seams Nos. 13-1, 11-2 and 8 of the Pan-1 coal mine are 8.18 m3/t and 2.20 MPa; 3.89 m3/t and 2.47 MPa and 6.35 m3/t and 2.89 MPa, respectively. This agrees very well with current mining data.展开更多
It is a lot limitations to survey and design waterway by the CAD technique, due to timely variation of hydrology and ecology in the complicated estuary area, such as Changjing River estuary. In this paper, the advanta...It is a lot limitations to survey and design waterway by the CAD technique, due to timely variation of hydrology and ecology in the complicated estuary area, such as Changjing River estuary. In this paper, the advantages of GIS technique is applied to manage and process the multi kind , multi scale and multi time hydrographic parameters, including water depth, current velocity, tidal, waves, wind speed, temperature and salinity etc., also to deal with different projection, different scale charts. Meanwhile, in the paper, combination techniques of GIS and CAD has been developed for unification of the charts for efficient management, two-way automatic carts conversion between GIS and CAD, automatic cutting and assemble of a number of Charts, flight path of the projection of spatial data and coordinate transformation. This new technique has been applied to survey and design waterway of Changing River estuary. The result shows that the combination technology of GIS and CAD has application potentiality in the waterway survey and design.展开更多
Taking Sichuan Province as an example,by using the overall evaluation function of Sichuan's rural public service equalization development level and rural socio-economic development level,we conduct profound analys...Taking Sichuan Province as an example,by using the overall evaluation function of Sichuan's rural public service equalization development level and rural socio-economic development level,we conduct profound analysis on coordination between public service in Sichuan's rural areas and socio-economic development from 2003 to 2008.The results show that the coordination between rural public service and socio-economic development in Sichuan Province is not high,and the equalization phenomenon of rural public service construction and socio-economic development is very prominent.The equalization development of public service in rural areas of Sichuan Province from 2003 to 2008 lags behind socio-economic development.The coordination between public service equalization system in rural areas of Sichuan Province and socio-economic development system abates continuously;the coordination between infrastructure and socio-economic development increases slowly;the coordination between education and socio-economic development declines sharply;the coordination between public culture and socio-economic development tends to decrease;the coordination between ecological environment construction and socio-economic development decreases continuously with great amplitude;the coordination between public health and socio-economic development decreases continuously;the coordination between science and technology and socio-economic development lingers at low level;the coordination between social security and employment,and socio-economic development increases in fluctuation,but with small amplitude.展开更多
This paper aims to analyze the characteristics of body composition changes of Uygur collegestudents and explore the correlation between their body composition and lifestyle.A cross-sectional investigationwas conducted...This paper aims to analyze the characteristics of body composition changes of Uygur collegestudents and explore the correlation between their body composition and lifestyle.A cross-sectional investigationwas conducted on 526 Uygur students(264 males and 262 females)by using the stratified cluster samplingmethod.Questionnaires were used to study their lifestyles,and bioimpedance analyzers were used to measure thebody composition-related indicators.It was found that there were gender differences in various body compositionindicators of Uyghur college students at different ages,and the average value reached a peak in the 21-year-oldgroup.The average BMI,the average BFP and the average WHR were within normal ranges.Compared withother college student groups recently reported,the obesity rate was relatively lower.The proportion of Uyghurgirls with abnormal BFP was higher than that of boys,and the proportion of boys with abnormal WHR and VAIindexes was higher than that of girls.Exercise status was negatively correlated with fat mass,BFP and WHR,and positively correlated with other indicators.Therefore,Uygur college students'body composition indicatorsvary with gender and age.Exercise has a significant effect on many body composition indicators of Uygur collegestudents,and can effectively improve the proportion of body composition.展开更多
The Longwangmiao Fm group gas reservoirs in the Moxi structure in central Sichuan Basin feature high temperature,high pressure and high H2S content.The thickness of such high permeable reservoirs with great homogeneit...The Longwangmiao Fm group gas reservoirs in the Moxi structure in central Sichuan Basin feature high temperature,high pressure and high H2S content.The thickness of such high permeable reservoirs with great homogeneity is a geologic basis for a high-productivity gas well,and good match of natural fractures and vugs is the key factor to high well productivity.Overbalance drilling is likely to cause the opening-up of natural fractures,which will lead to the leakage of drilling fluid and severe damage to the reservoir.Experimental evaluation results show that the damage rate of the drilling fluid to the rock sample is between 82.2%and 89.2%,which severely restricts the productivity of gas wells.Therefore,it is necessary to deepen the experimental evaluation technologies and methods to promote the design pertinence of technical parameters.The study shows:first,the optimized gelling acid and steering acid are effective in slowing down speed and removing blockage,forming acidizing wormholes and effectively eliminating the blockage effect caused by drilling liquid pollution;second,the self-developed fiber steering agent and soluble temporary blocking ball can divert the acid,increasing the processing pressure at the well bottom by 5-15 MPa,realizing the even stimulation of heterogeneous reservoirs;third,based on experimental evaluation such as the acid penetration and acid rock reaction,it is recommended that the pumping rate be 3.0-3.5 m^(3)/min in acidizing treatment and the acid intensity for blockage removal be 3.0-5.0 m^(3)/m;fourth,the established blockage removal and steering acidizing technology have been applied in more than 20 wells with a remarkable productivity-increase effect,which gives full play to the natural productivity of gas wells and decreases the acid application scale.All these technologies and measures effectively enhance the development quality and profit of the gas reservoir.展开更多
基金Project 2005CB221501 supported by the National Basic Research Program of China
文摘The Pan-1 coal mine located in Huainan municipality, Anhui province, is abundant in coal resources. In order to discover the natural conditions of gas in its coal seams, we inverted the burial history of these coal seams using the software of Easy%Ro method and simulated the development process of gas volumes and pressure of the major coal seams using CBM History Simulation Software. Our analysis shows that the devolution of gas volumes and levels of pressure can be divided into four stages: i.e., a biogas stage (P1-P3), a pyrolysis gas stage (T1-T2), an active gas enrichment stage (T3-K1) and a gas dissipating stage (K2-present). Currently, the average amounts of gas and gas pressure in coal seams Nos. 13-1, 11-2 and 8 of the Pan-1 coal mine are 8.18 m3/t and 2.20 MPa; 3.89 m3/t and 2.47 MPa and 6.35 m3/t and 2.89 MPa, respectively. This agrees very well with current mining data.
文摘It is a lot limitations to survey and design waterway by the CAD technique, due to timely variation of hydrology and ecology in the complicated estuary area, such as Changjing River estuary. In this paper, the advantages of GIS technique is applied to manage and process the multi kind , multi scale and multi time hydrographic parameters, including water depth, current velocity, tidal, waves, wind speed, temperature and salinity etc., also to deal with different projection, different scale charts. Meanwhile, in the paper, combination techniques of GIS and CAD has been developed for unification of the charts for efficient management, two-way automatic carts conversion between GIS and CAD, automatic cutting and assemble of a number of Charts, flight path of the projection of spatial data and coordinate transformation. This new technique has been applied to survey and design waterway of Changing River estuary. The result shows that the combination technology of GIS and CAD has application potentiality in the waterway survey and design.
文摘Taking Sichuan Province as an example,by using the overall evaluation function of Sichuan's rural public service equalization development level and rural socio-economic development level,we conduct profound analysis on coordination between public service in Sichuan's rural areas and socio-economic development from 2003 to 2008.The results show that the coordination between rural public service and socio-economic development in Sichuan Province is not high,and the equalization phenomenon of rural public service construction and socio-economic development is very prominent.The equalization development of public service in rural areas of Sichuan Province from 2003 to 2008 lags behind socio-economic development.The coordination between public service equalization system in rural areas of Sichuan Province and socio-economic development system abates continuously;the coordination between infrastructure and socio-economic development increases slowly;the coordination between education and socio-economic development declines sharply;the coordination between public culture and socio-economic development tends to decrease;the coordination between ecological environment construction and socio-economic development decreases continuously with great amplitude;the coordination between public health and socio-economic development decreases continuously;the coordination between science and technology and socio-economic development lingers at low level;the coordination between social security and employment,and socio-economic development increases in fluctuation,but with small amplitude.
文摘This paper aims to analyze the characteristics of body composition changes of Uygur collegestudents and explore the correlation between their body composition and lifestyle.A cross-sectional investigationwas conducted on 526 Uygur students(264 males and 262 females)by using the stratified cluster samplingmethod.Questionnaires were used to study their lifestyles,and bioimpedance analyzers were used to measure thebody composition-related indicators.It was found that there were gender differences in various body compositionindicators of Uyghur college students at different ages,and the average value reached a peak in the 21-year-oldgroup.The average BMI,the average BFP and the average WHR were within normal ranges.Compared withother college student groups recently reported,the obesity rate was relatively lower.The proportion of Uyghurgirls with abnormal BFP was higher than that of boys,and the proportion of boys with abnormal WHR and VAIindexes was higher than that of girls.Exercise status was negatively correlated with fat mass,BFP and WHR,and positively correlated with other indicators.Therefore,Uygur college students'body composition indicatorsvary with gender and age.Exercise has a significant effect on many body composition indicators of Uygur collegestudents,and can effectively improve the proportion of body composition.
基金Special and Significant Project of National Science and Technology:“Research on Development Techniques of Complex Carbonate Gas Reservoirs”(No.2011ZX05015-003-005).
文摘The Longwangmiao Fm group gas reservoirs in the Moxi structure in central Sichuan Basin feature high temperature,high pressure and high H2S content.The thickness of such high permeable reservoirs with great homogeneity is a geologic basis for a high-productivity gas well,and good match of natural fractures and vugs is the key factor to high well productivity.Overbalance drilling is likely to cause the opening-up of natural fractures,which will lead to the leakage of drilling fluid and severe damage to the reservoir.Experimental evaluation results show that the damage rate of the drilling fluid to the rock sample is between 82.2%and 89.2%,which severely restricts the productivity of gas wells.Therefore,it is necessary to deepen the experimental evaluation technologies and methods to promote the design pertinence of technical parameters.The study shows:first,the optimized gelling acid and steering acid are effective in slowing down speed and removing blockage,forming acidizing wormholes and effectively eliminating the blockage effect caused by drilling liquid pollution;second,the self-developed fiber steering agent and soluble temporary blocking ball can divert the acid,increasing the processing pressure at the well bottom by 5-15 MPa,realizing the even stimulation of heterogeneous reservoirs;third,based on experimental evaluation such as the acid penetration and acid rock reaction,it is recommended that the pumping rate be 3.0-3.5 m^(3)/min in acidizing treatment and the acid intensity for blockage removal be 3.0-5.0 m^(3)/m;fourth,the established blockage removal and steering acidizing technology have been applied in more than 20 wells with a remarkable productivity-increase effect,which gives full play to the natural productivity of gas wells and decreases the acid application scale.All these technologies and measures effectively enhance the development quality and profit of the gas reservoir.
