为提升铌酸钾钠基无铅陶瓷的透光率,使用传统固相法制备了0.95(K 1/2 Na 1/2)NbO_(3)-0.05Ba(Zn 1/3 Nb 2/3)O_(3)-x mol%LiBiO_(2)(简称0.95KNN-0.05BZN-x%LB)透明陶瓷,对其透光率进行表征。结果发现:当x=1时,陶瓷的透光率最高(65%,780...为提升铌酸钾钠基无铅陶瓷的透光率,使用传统固相法制备了0.95(K 1/2 Na 1/2)NbO_(3)-0.05Ba(Zn 1/3 Nb 2/3)O_(3)-x mol%LiBiO_(2)(简称0.95KNN-0.05BZN-x%LB)透明陶瓷,对其透光率进行表征。结果发现:当x=1时,陶瓷的透光率最高(65%,780 nm);而当掺杂量继续增加时,陶瓷内部气孔开始增多,透光率逐渐下降。结果表明,适量LiBiO_(2)的引入不仅降低陶瓷的气孔率,而且增大晶粒尺寸,减少由气孔和晶界产生的光散射,有效提升陶瓷的透光率。展开更多
The Upper Paleozoic in the north part of Tianhuan depression in the Ordos Basin,NW China has lower hydrocarbon generation intensity and complex gas-water relationship,the main factors controlling the formation of tigh...The Upper Paleozoic in the north part of Tianhuan depression in the Ordos Basin,NW China has lower hydrocarbon generation intensity and complex gas-water relationship,the main factors controlling the formation of tight sandstone gas and the distribution of tight sandstone gas in the low hydrocarbon generation intensity area are studied.Through two-dimensional physical simulation experiment of hydrocarbon accumulation,analysis of reservoir micro-pore-throat hydrocarbon system and dissection of typical gas reservoirs,the evaluation models of gas injection pressure,reservoir physical property,and gas generation threshold were established to determine the features of tight gas reservoirs in low hydrocarbon intensity area:(1)at the burial depth of less than 3 000 m,the hydrocarbon generation intensity ofis high enough to maintain effective charging;(2)tight sandstone in large scale occurrence is conducive to accumulation of tight gas;(3)differences in reservoir physical property control the distribution of gas pool,for the channel sandstone reservoirs,ones with better physical properties generally concentrate in the middle of sandstone zone and local structural highs;ones with poor physical properties have low gas content generally.Based on the dissection of the gas reservoir in the north Tianhuan depression,the formation of tight gas reservoirs in low hydrocarbon generating intensity area are characterized by"long term continuous charging under hydrocarbon generation pressure,gas accumulation in large scale tight sandstone,pool control by difference in reservoir physical property,and local sweet spot",and the tight gas pools are distributed in discontinuous"sheets"on the plane.This understanding has been proved by expanding exploration of tight sandstone gas in the north Tianhuan depression.展开更多
文摘为提升铌酸钾钠基无铅陶瓷的透光率,使用传统固相法制备了0.95(K 1/2 Na 1/2)NbO_(3)-0.05Ba(Zn 1/3 Nb 2/3)O_(3)-x mol%LiBiO_(2)(简称0.95KNN-0.05BZN-x%LB)透明陶瓷,对其透光率进行表征。结果发现:当x=1时,陶瓷的透光率最高(65%,780 nm);而当掺杂量继续增加时,陶瓷内部气孔开始增多,透光率逐渐下降。结果表明,适量LiBiO_(2)的引入不仅降低陶瓷的气孔率,而且增大晶粒尺寸,减少由气孔和晶界产生的光散射,有效提升陶瓷的透光率。
基金Supported by the China National Science and Technology Major Project(2016ZX05047)
文摘The Upper Paleozoic in the north part of Tianhuan depression in the Ordos Basin,NW China has lower hydrocarbon generation intensity and complex gas-water relationship,the main factors controlling the formation of tight sandstone gas and the distribution of tight sandstone gas in the low hydrocarbon generation intensity area are studied.Through two-dimensional physical simulation experiment of hydrocarbon accumulation,analysis of reservoir micro-pore-throat hydrocarbon system and dissection of typical gas reservoirs,the evaluation models of gas injection pressure,reservoir physical property,and gas generation threshold were established to determine the features of tight gas reservoirs in low hydrocarbon intensity area:(1)at the burial depth of less than 3 000 m,the hydrocarbon generation intensity ofis high enough to maintain effective charging;(2)tight sandstone in large scale occurrence is conducive to accumulation of tight gas;(3)differences in reservoir physical property control the distribution of gas pool,for the channel sandstone reservoirs,ones with better physical properties generally concentrate in the middle of sandstone zone and local structural highs;ones with poor physical properties have low gas content generally.Based on the dissection of the gas reservoir in the north Tianhuan depression,the formation of tight gas reservoirs in low hydrocarbon generating intensity area are characterized by"long term continuous charging under hydrocarbon generation pressure,gas accumulation in large scale tight sandstone,pool control by difference in reservoir physical property,and local sweet spot",and the tight gas pools are distributed in discontinuous"sheets"on the plane.This understanding has been proved by expanding exploration of tight sandstone gas in the north Tianhuan depression.
