Predicting high-quality volcanic reservoirs is one of the key issues for oil and gas exploration in the Songnan gas field.Core,seismic,and measurement data were used to study the lithologies,facies,reservoir porosity,...Predicting high-quality volcanic reservoirs is one of the key issues for oil and gas exploration in the Songnan gas field.Core,seismic,and measurement data were used to study the lithologies,facies,reservoir porosity,and reservoir types of the volcanic rocks in the Songnan gas field.The primary controlling factors and characteristics of the high-quality volcanic reservoirs of the Yingcheng Formation in the Songnan gas field were investigated,including the volcanic eruptive stage,edifice,edifice facies,cooling unit,lithology,facies,and diagenesis.Stages with more volatile content can form more high-quality reservoirs.The effusive rhyolite,explosive tuff,and tuff lava that formed in the crater,near-crater,and proximal facies and in the high-volatility cooling units of large acidic-lava volcanic edifices are the most favorable locations for the development of the high-quality reservoirs in the Songnan gas field.Diagenesis dissolution,which is controlled by tectonic action,can increase the size of secondary pores in reservoirs.Studying the controlling factors of the high-quality reservoirs can provide a theoretical basis for the prediction and analysis of high-quality volcanic reservoirs.展开更多
Exploration for oil and deep gas in northern Songliao Basin,complex rift basin—Hailaer Basin,and Yi-Shu Graben in peripheral basin has technical challenge.Researches on supporting technology including seismic acquisi...Exploration for oil and deep gas in northern Songliao Basin,complex rift basin—Hailaer Basin,and Yi-Shu Graben in peripheral basin has technical challenge.Researches on supporting technology including seismic acquisition,processing and interpretation,logging and drilling are performed to establish high resolution 3D seismic technology for lithologic reservoir,deep volcanic rock and complex rift basin,reservoir evaluation and stimulation technology for low permeability reservoir,volcanic reservoir and complex rift reservoir,and drilling technology for deep volcanic rock,providing technical support for reserves increase in northern Songliao Basin,large gas reservoirs discovery in deep volcanic rock and exploration progress in complex rift basin.Next-step development trend of exploration technology is proposed to meet the demand of more technical challenges in the future.展开更多
The change of pine scale (Hemiberlesia pitysophila Takagi) population density on pine forest in urban park between treatment (tending operations) and CK (no tending operations) was researched in this paper. The result...The change of pine scale (Hemiberlesia pitysophila Takagi) population density on pine forest in urban park between treatment (tending operations) and CK (no tending operations) was researched in this paper. The results were shown as follows: population density declined to 0.63 head per bundle from 2.61 heads per bundle when crown density of pine in urban park had become 0.5 or so by means of cultivation activities such as felling, pruning and thinning and so on, and drop got to 75.86 percent. The pinewoods would soon get revived once using these cultivation activities, so tending operations was main measures controlling over harm of pine scale in urban park; At the same time, population density of pine scale on pinewoods in the sunny slope was more than that in the somber slope and it had become less and less from sunny slope to somber slope. Therefore, tree species must be chosen in the planning and design of urban park for preventing harm and happening of pine scale.展开更多
基金Project(2009CB219306)supported by the National Basic Research Program of ChinaProject supported by the Key-Lab for Evolution of Past Lift and Environment in Northeast Asia,Ministry of Education,China+1 种基金Project supported by the third-phase Project 211 at Jilin University,ChinaProject supported by the Basic Research Fund of the Ministry of Education in 2009(Innovation Team Development Program,Jilin University)
文摘Predicting high-quality volcanic reservoirs is one of the key issues for oil and gas exploration in the Songnan gas field.Core,seismic,and measurement data were used to study the lithologies,facies,reservoir porosity,and reservoir types of the volcanic rocks in the Songnan gas field.The primary controlling factors and characteristics of the high-quality volcanic reservoirs of the Yingcheng Formation in the Songnan gas field were investigated,including the volcanic eruptive stage,edifice,edifice facies,cooling unit,lithology,facies,and diagenesis.Stages with more volatile content can form more high-quality reservoirs.The effusive rhyolite,explosive tuff,and tuff lava that formed in the crater,near-crater,and proximal facies and in the high-volatility cooling units of large acidic-lava volcanic edifices are the most favorable locations for the development of the high-quality reservoirs in the Songnan gas field.Diagenesis dissolution,which is controlled by tectonic action,can increase the size of secondary pores in reservoirs.Studying the controlling factors of the high-quality reservoirs can provide a theoretical basis for the prediction and analysis of high-quality volcanic reservoirs.
文摘Exploration for oil and deep gas in northern Songliao Basin,complex rift basin—Hailaer Basin,and Yi-Shu Graben in peripheral basin has technical challenge.Researches on supporting technology including seismic acquisition,processing and interpretation,logging and drilling are performed to establish high resolution 3D seismic technology for lithologic reservoir,deep volcanic rock and complex rift basin,reservoir evaluation and stimulation technology for low permeability reservoir,volcanic reservoir and complex rift reservoir,and drilling technology for deep volcanic rock,providing technical support for reserves increase in northern Songliao Basin,large gas reservoirs discovery in deep volcanic rock and exploration progress in complex rift basin.Next-step development trend of exploration technology is proposed to meet the demand of more technical challenges in the future.
文摘The change of pine scale (Hemiberlesia pitysophila Takagi) population density on pine forest in urban park between treatment (tending operations) and CK (no tending operations) was researched in this paper. The results were shown as follows: population density declined to 0.63 head per bundle from 2.61 heads per bundle when crown density of pine in urban park had become 0.5 or so by means of cultivation activities such as felling, pruning and thinning and so on, and drop got to 75.86 percent. The pinewoods would soon get revived once using these cultivation activities, so tending operations was main measures controlling over harm of pine scale in urban park; At the same time, population density of pine scale on pinewoods in the sunny slope was more than that in the somber slope and it had become less and less from sunny slope to somber slope. Therefore, tree species must be chosen in the planning and design of urban park for preventing harm and happening of pine scale.
