On the basis of the stratigraphy introducing stratum general situation of the Dongying Formation of Paleogene in Tanggu of Tianjin,Stratigraphy-lithofacies -paleogeography of the Dongying Formation are analyzed.The Do...On the basis of the stratigraphy introducing stratum general situation of the Dongying Formation of Paleogene in Tanggu of Tianjin,Stratigraphy-lithofacies -paleogeography of the Dongying Formation are analyzed.The Dongying Formation appears in proper order deposition array of delta plain and delta leading edge from dry land to lake basin in this area.According to a synthetic results展开更多
In order to construct a newly developed green area, the Tanggu urban area as the core part of Binhai new area,needs more and more clean energy year by year. This area is abound in geothermal resources endowed by the g...In order to construct a newly developed green area, the Tanggu urban area as the core part of Binhai new area,needs more and more clean energy year by year. This area is abound in geothermal resources endowed by the grand Nature.Based on the estimation of展开更多
Based on observed data from Tanggu District in Tianjin, a back-propagation neural network (BPNN) model was introduced to predict possible land subsidence due to exploitation of groundwater. According to model estimati...Based on observed data from Tanggu District in Tianjin, a back-propagation neural network (BPNN) model was introduced to predict possible land subsidence due to exploitation of groundwater. According to model estimation under various hypothetical extraction scenarios, patterns of land subsidence at Tanggu District were studied and discussed.The predicted average background land subsidence rate of Tanggu is 9.47 mm/a.The significance of contribution of aquifers to land subsidence descends in order of units Ⅳ,Ⅲ,Ⅴ,Ⅱ.Land subsidence tends to deteriorate with the increase in total extraction rate.展开更多
Based on introducing geological structure of Tanggu area,the authors analyzed the sedimentary environment of Paleogene Dongying Formation,and further analyzed its geothermal occurrence. The studied area spans two gra...Based on introducing geological structure of Tanggu area,the authors analyzed the sedimentary environment of Paleogene Dongying Formation,and further analyzed its geothermal occurrence. The studied area spans two grade Ⅳ tectonic units which are Beitang depression and Banqiao depression. The studied area is mainly located in the Tanggu nose-like structure which is the secondary structure of Beitang depression. Its existence affects the sedimentary distribution of the part strata of Paleogene. The depositions of Dongying Ⅲ( SQEd3) and DongyingⅡ( SQEd2) are mainly delta front facies and lake sand bars which are propitious to the geothermal fluid enrichment. The favorable enrichment region of geothermal fluid is located in south HetouTanggu. Most of DongyingⅠ( SQEd1) changes into swamp plain deposition,only the northeast part of this area is the distributary riverway facies with developed sand layers. There is the favorable enrichment region of geothermal fluid. The hydraulic connection is weak among the geothermal reservoirs of Dongying Formation and its overlying Guantao and Minghuazhen formations. The underlying Shahejie Formation geothermal reservoir provides a steady stream of fluid supply and ground pressure protection for Dongying Formation geothermal reservoir.展开更多
文摘On the basis of the stratigraphy introducing stratum general situation of the Dongying Formation of Paleogene in Tanggu of Tianjin,Stratigraphy-lithofacies -paleogeography of the Dongying Formation are analyzed.The Dongying Formation appears in proper order deposition array of delta plain and delta leading edge from dry land to lake basin in this area.According to a synthetic results
文摘In order to construct a newly developed green area, the Tanggu urban area as the core part of Binhai new area,needs more and more clean energy year by year. This area is abound in geothermal resources endowed by the grand Nature.Based on the estimation of
基金Supported by Tianjin Land Subsidence Controlling Office(No.kJ/095).
文摘Based on observed data from Tanggu District in Tianjin, a back-propagation neural network (BPNN) model was introduced to predict possible land subsidence due to exploitation of groundwater. According to model estimation under various hypothetical extraction scenarios, patterns of land subsidence at Tanggu District were studied and discussed.The predicted average background land subsidence rate of Tanggu is 9.47 mm/a.The significance of contribution of aquifers to land subsidence descends in order of units Ⅳ,Ⅲ,Ⅴ,Ⅱ.Land subsidence tends to deteriorate with the increase in total extraction rate.
基金Supported by Project of Dongying Geothermal Resources Survey in Tanggu area of Tianjin(Tianjin Land and Housing Task[2008]No.003)
文摘Based on introducing geological structure of Tanggu area,the authors analyzed the sedimentary environment of Paleogene Dongying Formation,and further analyzed its geothermal occurrence. The studied area spans two grade Ⅳ tectonic units which are Beitang depression and Banqiao depression. The studied area is mainly located in the Tanggu nose-like structure which is the secondary structure of Beitang depression. Its existence affects the sedimentary distribution of the part strata of Paleogene. The depositions of Dongying Ⅲ( SQEd3) and DongyingⅡ( SQEd2) are mainly delta front facies and lake sand bars which are propitious to the geothermal fluid enrichment. The favorable enrichment region of geothermal fluid is located in south HetouTanggu. Most of DongyingⅠ( SQEd1) changes into swamp plain deposition,only the northeast part of this area is the distributary riverway facies with developed sand layers. There is the favorable enrichment region of geothermal fluid. The hydraulic connection is weak among the geothermal reservoirs of Dongying Formation and its overlying Guantao and Minghuazhen formations. The underlying Shahejie Formation geothermal reservoir provides a steady stream of fluid supply and ground pressure protection for Dongying Formation geothermal reservoir.
