摘要 :
The probability volume method is a relatively ideal method for reserves evaluation. Taking the Upper Ordovician Wufeng Formation and the lower part of the Lower Silurian Longmaxi Formation in well block X of Fuling shale gas field...
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The probability volume method is a relatively ideal method for reserves evaluation. Taking the Upper Ordovician Wufeng Formation and the lower part of the Lower Silurian Longmaxi Formation in well block X of Fuling shale gas field for example, the authors established three—dimensional geological models of the work area by stochastic modeling technique, analyzed five categories of uncertain parameters which influence the shale gas reserves calculation result, and set three levels: pessimistic, possible and optimistic for each parameter. Furthermore, 18 groups of simulation programs were devised and calculated individually by the method of orthogonal experimental design, and the simulation results were analyzed with intuitive and variance analysis methods. Those uncertain parameters which influenced the shale gas reserves were quantitatively evaluated. Ultimately, the probability distribution of the shale gas reserves was gotten. This method reduces the experiment times and improves the evaluation efficiency.
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摘要 :
Based on ascending and descending tracks of the Sentinel—1A satellite IW model, combined with the precision orbit data provided by ESA, the differential interferogram is obtained by removing the terrain phase from the ASTEM GDEM ...
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Based on ascending and descending tracks of the Sentinel—1A satellite IW model, combined with the precision orbit data provided by ESA, the differential interferogram is obtained by removing the terrain phase from the ASTEM GDEM V2 data with 30 m grid spacing. The differential interferogram is unwrapped by minimum cost flow algorithm in order to derive the precise coseismic surface displacements of the Menyuan Mw 5. 9 earthquake occurred on January 21, 2016.
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摘要 :
The Kuqa Depression is filled by the Mesozoic terrestrial sediments with a thickness of 4 000 — 5 000 m and can be up to 6 000 m thick locally. On the geological outcrops at the northern margin of the depression, the Mesozoic str...
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The Kuqa Depression is filled by the Mesozoic terrestrial sediments with a thickness of 4 000 — 5 000 m and can be up to 6 000 m thick locally. On the geological outcrops at the northern margin of the depression, the Mesozoic strata angular unconformaly overlie the strongly deformed and metamorphosed Paleozoic sequences.
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Shallow geothermal energy has been greatly developed and publicized as an affordable mineral resource that is worthy to research under today '' s economic environment and technological conditions. The application of ground source ...
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Shallow geothermal energy has been greatly developed and publicized as an affordable mineral resource that is worthy to research under today '' s economic environment and technological conditions. The application of ground source heat pump system using buried pipelines is advancing especially rapidly. However, the underground water — source based heat pump system has attracted much less research and attention.
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摘要 :
Geomorphological, geological and engineering geological information is used as the base data to characterize the subsurface condition and for sustainable urban planning and development of the rapidly expanding Mymensingh city. Ext...
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Geomorphological, geological and engineering geological information is used as the base data to characterize the subsurface condition and for sustainable urban planning and development of the rapidly expanding Mymensingh city. Extensive field work has been completed to get the realistic scenario, data and samples have been collected from surface and subsurface with auguring and geotechnical boring. The laboratory tests have been performed following standard laboratory procedures. Geomorphologically the area is broadly classified into Older Floodplain or Mymensingh Terrace and Younger Floodplain. These two flood plains are separated by Old Brahmaputra River. Geologically the area is mainly covered by the recent alluvial flood plain deposits which are underlain by the Pleistocene Madhupur clay deposits. The Younger Flood Plain deposit consists of mainly unconsolidated fine to medium sands with some silt and clay whereas the Older Flood Plain deposits are mainly consisting of silty clay and fine to medium sand. Moderately compacted sediments of older flood plain deposit are suitable for urban development. Based on geotechnical characteristics and the N values (blow counts of Spontaneous Penetration Test, SPT) of the subsurface sediments, the study area is classified into four Engineering Geological Units. Unit I indicates loose soil and is suitable for shallow foundation. Unit II is indicating compact soil packing;N value of these two units increase with depth and would be good for heavy foundation. Unit III is suitable for shallow structures. Unit IV, which is composed of mostly clay, silty clay and sand with highly compressive organic clay, is recommended to avoid any heavy construction and could be used as open place, water retaining zone etc. Beside the geological and engineering geological study details hydrology and hydrogeological and a systematic study on seismic hazards are strongly recommended before planning of urban area.
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