In common practice in the oil fields,the injection of water and gas into reservoirs is a crucial technique to increase production.The control of the waterflooding front in oil/gas exploitation is a matter of great con...In common practice in the oil fields,the injection of water and gas into reservoirs is a crucial technique to increase production.The control of the waterflooding front in oil/gas exploitation is a matter of great concern to reservoir engineers.Monitoring the waterflooding front in oil/gas wells plays a very important role in adjusting the well network and later in production,taking advantage of the remaining oil po-tential and ultimately achieving great success in improving the recovery rate.For a long time,micro-seismic monitoring,numerical simulation,four-dimensional seismic and other methods have been widely used in waterflooding front monitoring.However,reconciling their reliability and cost poses a significant challenge.In order to achieve real-time,reliable and cost-effective monitoring,we propose an innovative method for waterflooding front monitoring through the similarity analysis of passive source time-lapse seismic images.Typically,passive source seismic data collected from oil fields have extremely low signal-to-noise ratio(SNR),which poses a serious problem for obtaining structural images.The proposed method aims to visualize and analyze underground changes by highlighting time-lapse images and provide a strategy for underground monitoring using long-term passive source data under low SNR conditions.First,we verify the feasibility of the proposed method by designing a theoretical model.Then,we conduct an analysis of the correlation coefficient(similarity)on the passive source time-lapse seismic imaging results to enhance the image differences and identify the simulated waterflooding fronts.Finally,the proposed method is applied to the actual waterflooding front monitoring tasks in Shengli Oilfield,China.The research findings indicate that the monitoring results are consistent with the actual devel-opment conditions,which in turn demonstrates that the proposed method has great potential for practical application and is very suitable for monitoring common development tasks in oil fields.展开更多
We report the results from systematic studies of Shengli lignite coal-solvent slurries. Solvent type, temperature, coal to solvent ratio, particle granularity, shear rate and shear time were investigated. The viscosit...We report the results from systematic studies of Shengli lignite coal-solvent slurries. Solvent type, temperature, coal to solvent ratio, particle granularity, shear rate and shear time were investigated. The viscosity of the solvents is time independent. However, the slurries are thixotropic. A change from pseudo-plastic to Newtonian behavior occurs as the temperature, or as the solvent to coal ratio, increases. The solvent used in the slurry affects the point at which the rheology changes from pseudo-plastic to Newtonian. The REC slurry changes at 1:1.2 coal to solvent ratio and at 40 °C. The HAR slurry changes at a 1:1.5 ratio and at 60 °C. The rheology of the slurries is pseudo-plastic at low shear rates but Newtonian at high shear rates.展开更多
Abstract: Types of polymerized molecular network structure and degree of bond breakdown for glass phases of magmatic inclusions and glassy matrix in volcanic rocks from the Shengli oilfield have been defined by the la...Abstract: Types of polymerized molecular network structure and degree of bond breakdown for glass phases of magmatic inclusions and glassy matrix in volcanic rocks from the Shengli oilfield have been defined by the laser Raman spectroscopic investigation. There are significant differences in types of polymerized molecular network structure and degree of bond breakdown of the magmatic glass phases between the non-CO2 and CO2 gas pools: magmatic glass phases of fluid inclusions and matrix in volcanic rocks from the CO2 gas pool contain more sheet network molecules and have a greater degree of bond beakdown than those from the non-CO2 gas pool; and when gas bubbles occur in evolving magma, magma saturated with volatile components has more sheet network molecules. The results suggest the magmadegassing mechanism of the formation of CO2 gas pools in the Shengli oilfield.展开更多
The Shengli body-building appliances developed by the Zhejiang Shengli Group Co. in recent years cover ten categories and more than forty items. Shengli has become a "well-known trade mark of Zhejiang Province&qu...The Shengli body-building appliances developed by the Zhejiang Shengli Group Co. in recent years cover ten categories and more than forty items. Shengli has become a "well-known trade mark of Zhejiang Province". The main categories of the Shengli body-building appliances cover a comprehensive training machine, weight-lifting bed, jogging instrument, jogging machine, rowing machine, cycling machine, walking machine, massager and tramping machine. The product series are developing towards intelligent, computerized and multi-functionaltypes. There are both multi-functional展开更多
The Shengli brand sanitary wareproduced by the TangshanMunicipality Building CeramicsFactory under the Tangshan Shengli Ceramics(Group) Corporation are fine quality productsnominated by the Ministry and have beenaward...The Shengli brand sanitary wareproduced by the TangshanMunicipality Building CeramicsFactory under the Tangshan Shengli Ceramics(Group) Corporation are fine quality productsnominated by the Ministry and have beenawarded the honourary certificate for exportproducts by the Ministry of Foreign Tradeand Cooperation. The factory is of advanced technicalprocess in production, and boasts an importedvertical casting production line for展开更多
China completed the construction of the world's longest expressway tunnel through snow⁃covered mountains in the Xinjiang Uygur Autonomous Region,marking a significant milestone in its infrastructure development.On...China completed the construction of the world's longest expressway tunnel through snow⁃covered mountains in the Xinjiang Uygur Autonomous Region,marking a significant milestone in its infrastructure development.Once operational,the 22.13⁃km Tianshan Shengli Tunnel will reduce the travel time through the Tianshan Mountains-one of the longest mountain ranges in the world-from 3 hours to about 20 minutes.展开更多
基金supported by the CNPC-SWPU Innovation Alliance Technology Cooperation Project(2020CX020000)the National Natural Science Foundation of China(42022028)+1 种基金the Natural Science Foundation of Sichuan Province(24NSFSC0808)the China Scholarship Council(202306440144)。
文摘In common practice in the oil fields,the injection of water and gas into reservoirs is a crucial technique to increase production.The control of the waterflooding front in oil/gas exploitation is a matter of great concern to reservoir engineers.Monitoring the waterflooding front in oil/gas wells plays a very important role in adjusting the well network and later in production,taking advantage of the remaining oil po-tential and ultimately achieving great success in improving the recovery rate.For a long time,micro-seismic monitoring,numerical simulation,four-dimensional seismic and other methods have been widely used in waterflooding front monitoring.However,reconciling their reliability and cost poses a significant challenge.In order to achieve real-time,reliable and cost-effective monitoring,we propose an innovative method for waterflooding front monitoring through the similarity analysis of passive source time-lapse seismic images.Typically,passive source seismic data collected from oil fields have extremely low signal-to-noise ratio(SNR),which poses a serious problem for obtaining structural images.The proposed method aims to visualize and analyze underground changes by highlighting time-lapse images and provide a strategy for underground monitoring using long-term passive source data under low SNR conditions.First,we verify the feasibility of the proposed method by designing a theoretical model.Then,we conduct an analysis of the correlation coefficient(similarity)on the passive source time-lapse seismic imaging results to enhance the image differences and identify the simulated waterflooding fronts.Finally,the proposed method is applied to the actual waterflooding front monitoring tasks in Shengli Oilfield,China.The research findings indicate that the monitoring results are consistent with the actual devel-opment conditions,which in turn demonstrates that the proposed method has great potential for practical application and is very suitable for monitoring common development tasks in oil fields.
基金Project 2004CB217601 supported by the National Basic Research Program of China
文摘We report the results from systematic studies of Shengli lignite coal-solvent slurries. Solvent type, temperature, coal to solvent ratio, particle granularity, shear rate and shear time were investigated. The viscosity of the solvents is time independent. However, the slurries are thixotropic. A change from pseudo-plastic to Newtonian behavior occurs as the temperature, or as the solvent to coal ratio, increases. The solvent used in the slurry affects the point at which the rheology changes from pseudo-plastic to Newtonian. The REC slurry changes at 1:1.2 coal to solvent ratio and at 40 °C. The HAR slurry changes at a 1:1.5 ratio and at 60 °C. The rheology of the slurries is pseudo-plastic at low shear rates but Newtonian at high shear rates.
基金This research was supported by the National Natural Science Foundation of China grant 49573186.
文摘Abstract: Types of polymerized molecular network structure and degree of bond breakdown for glass phases of magmatic inclusions and glassy matrix in volcanic rocks from the Shengli oilfield have been defined by the laser Raman spectroscopic investigation. There are significant differences in types of polymerized molecular network structure and degree of bond breakdown of the magmatic glass phases between the non-CO2 and CO2 gas pools: magmatic glass phases of fluid inclusions and matrix in volcanic rocks from the CO2 gas pool contain more sheet network molecules and have a greater degree of bond beakdown than those from the non-CO2 gas pool; and when gas bubbles occur in evolving magma, magma saturated with volatile components has more sheet network molecules. The results suggest the magmadegassing mechanism of the formation of CO2 gas pools in the Shengli oilfield.
文摘The Shengli body-building appliances developed by the Zhejiang Shengli Group Co. in recent years cover ten categories and more than forty items. Shengli has become a "well-known trade mark of Zhejiang Province". The main categories of the Shengli body-building appliances cover a comprehensive training machine, weight-lifting bed, jogging instrument, jogging machine, rowing machine, cycling machine, walking machine, massager and tramping machine. The product series are developing towards intelligent, computerized and multi-functionaltypes. There are both multi-functional
文摘The Shengli brand sanitary wareproduced by the TangshanMunicipality Building CeramicsFactory under the Tangshan Shengli Ceramics(Group) Corporation are fine quality productsnominated by the Ministry and have beenawarded the honourary certificate for exportproducts by the Ministry of Foreign Tradeand Cooperation. The factory is of advanced technicalprocess in production, and boasts an importedvertical casting production line for
文摘China completed the construction of the world's longest expressway tunnel through snow⁃covered mountains in the Xinjiang Uygur Autonomous Region,marking a significant milestone in its infrastructure development.Once operational,the 22.13⁃km Tianshan Shengli Tunnel will reduce the travel time through the Tianshan Mountains-one of the longest mountain ranges in the world-from 3 hours to about 20 minutes.
