Time filter

Source Type

Wang J.,DMTI Spatial Inc. | Wang J.,York University | Cheng Q.,York University | Cheng Q.,China University of Geosciences | Chen J.,Ministry of Land and Resources
Mathematical Geosciences | Year: 2011

Urbanization has been an important component of land use and land cover change. Quantifying land use patterns and their changes is essential for monitoring and assessing the impact of urbanization. Data on existing and changing land use provide crucial clues for future development. Combining the application of remote sensing with geographic information systems (GIS) data, this study accomplishes (i) the creation of time-series land use maps in the core urban area of the city of Hangzhou, China; (ii) the examination of the land use cross-tabulation matrix to assess the transitions between land use types; and (iii) the introduction of a new asymmetric relation analysis method to explore the dependency relationship of different times in land use. The investigation was based on a 12-year time series dataset (1990-2002), compiled from fine-resolution satellite imagery and GIS-based maps. The results of the study showed that, first, there are strong associations between different stages (1990, 1996, and 2002) in land use development, and, secondly, the dependency between land use states was asymmetric in both stages of development. In addition, urbanization in Hangzhou has resulted in notable increases in the surface area of urban land and sharp decreases in the surface area of cropland. © 2011 International Association for Mathematical Geosciences.

Liu C.,China University of Petroleum - Beijing | Zhao W.,China University of Petroleum - Beijing | Zhu J.,Ministry of Land and Resources
Oil and Gas Journal | Year: 2011

Researchers from China University of Petroleum and Ministry of Land and Resource have conducted a study to forecast the production level and oil reserves of 81 China land frontier basins. The study presents two sorts of forecasting methods, the exploration and development rate analog method and the graph analog method, to predict frontier basins' oil and gas reserves and production in the next 20 years. After 2010, with the increase of oil reserves from Class 2 basins, cumulative oil proved reserves of these 81 basins will attain 180.42 million tons from 2011 to 2015. After 2015, discovery speed will quicken and cumulative oil proved reserves of 5 years will gradually go up from 242.34 million tons in 2016-20 to 278.50 million tons in 2026-30. Annual gas proved reserves in the 81 land frontier basins, were forecast to attain 1.13 billion cu m at yearend 2010, when all gas reserves will be from Class 1 basins.

Mu F.,Petrochina | Che C.,Ministry of Land and Resources | Chen Y.,Petrochina | Wang B.,Petrochina
Natural Gas Industry | Year: 2015

Since the environment for the CBM development in China has changed in recent years, it is necessary to re-consider the relevant strategies. Through investigations, surveys, geologic assessment, strategic decision-making and other techniques, the strategies for CBM development in China were discussed in respect to present situations, opportunities, challenges, proved reserves, developed reserves, strategic principles, strategic countermeasures, time-spatial allocation of strategies, risk assessments, and elimination of relevant risks. Relevant research results show that: (1) Still in its initial development stage with fast growth, the CBM industry in China has achieved outstanding achievements in six aspects and faced with challenges in six aspects; (2) Strategic focus can be summarized as constructing six CBM production bases in Qinshui, eastern Hubei province, Southwest China, Changqing, Northwest China, and Northeast China, respectively, according to the principles of “steadily developing high-rank coals, accelerating the development of low-rank coals and strengthening the comprehensive utilization of resources in the well”; it is expected that the cumulative production capacity and peak-production rate will be 3-4 trillion m3 and 35-45 billion m3, respectively; (3) Major strategic risks for CBM development in China include low productivities of individual wells, improper understandings of geologic conditions, decline in investments and lack of technical reserves. To eliminate these risks, it is necessary to reinforce work in the following five aspects, namely, strengthening comprehensive exploration and development of coal-bearing formations, creating favorable environments for the development of private oil companies, expanding spaces for the growth of technical service companies, conducting more researches for the development of innovative techniques in more areas and strengthening law enforcement. ©, 2015, Natural Gas Industry Journal Agency. All right reserved.

Liu C.,China University of Petroleum - Beijing | Zhao W.,China University of Petroleum - Beijing | Zhu J.,Ministry of Land and Resources
Oil and Gas Journal | Year: 2011

According to the China National Petroleum Assessment (2003-07), there are 81 land frontier basins in China (including Qiangtang, Chuoqin, Hetao) where in-place and recoverable oil resources are 10.06 billion ton and 2.13 billion ton, 13.15% and 10.07% of the nationwide estimated resources, respectively. In-place and recoverable gas resources are 3.02 trillion cu m and 1.76 trillion cu m, 8.61% and 8.00% of the total resource in the nation. From 2011 to 2030, oil proved reserves were forecast to be 0.97 billion ton, oil production 0.05 billion ton, gas proved reserves 134 billion cu m, and gas production 10.2 billion cu m in these 81 basins. The future oil and gas reserves and production will come mainly from the basins of Class 1 and Class 2, where the conditions of petroleum geology, resources, and exploration and development are more favorable than those of Class 3 and Class 4. A discussion covers conventional petroleum resources; petroleum geology; resource assessment; synthetic evaluation; discovery and production forecast; and oil and forecast.

Zhang H.-T.,Ministry of Land and Resources | Zhu Y.-H.,Chinese Academy of Geological Sciences
Geological Bulletin of China | Year: 2011

China is the third largest permafrost country in the world with 2.15 × 106 km2 permafrost zones, which are mainly located in the Tibetan Plateau of western China and the Da Hinggan Mountains in northeastern China, where there are fairly good formation conditions and prospects for gas hydrate. The formation conditions and potential of gas hydrate in China's permafrost have been studied since the end of the 1990s. Five projects have been implemented by China Geological Survey, in which geological, geophysical and geochemical investigation, drilling, and remote sensing survey have been performed since 2002. Gas hydrate was discovered in the Qilian Mountain permafrost in 2008, which makes China to be one of the few countries that possess both marine and permafrost gas hydrates. However, there are four problems to be solved, i.e., relatively low exploration level, backward key technique and equipment, low-level basic research and lack of trial production test. Progress of the exploration and research and production test of gas hydrate in permafrost zones will be surely accelerated in China because of the increasing attention and support from Chinese government.

Discover hidden collaborations