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sand controlling effect
相关语句
  相似匹配句对
     On Sand
     论砂
短句来源
     Controlling F.
     因此控制F.
短句来源
     THE THINKING OF CONTROLLING WATER AND SAND IN DONGTING RIVER
     关于洞庭湖水、沙治理的思考
短句来源
     A New Thinking of Controlling Sand Storm
     沙尘暴源头控制的新思路
短句来源
     Effect of fluid property on sand production and controlling measures
     流体性质对出砂的影响及控制
短句来源
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There is a close relation among sand control technique, sand controlling effect and completion technique. Four types of sand control completions are analyzed. If open hole gravel pack is used, a better flow conductivity for oil and gas and thicker gravel packing zone can be obtained. and a large-diameter screen will be suitable for sand control wells. If sanding tendency for perforated well is forcasted, the large-diameter casing is taken as the production casing, so as to complete holes with...

There is a close relation among sand control technique, sand controlling effect and completion technique. Four types of sand control completions are analyzed. If open hole gravel pack is used, a better flow conductivity for oil and gas and thicker gravel packing zone can be obtained. and a large-diameter screen will be suitable for sand control wells. If sanding tendency for perforated well is forcasted, the large-diameter casing is taken as the production casing, so as to complete holes with high perforation dencity and large perforation diameter. It is suggested to make a permeable artifical borehole wall if the pay bed is formed by unconsolidated sandstone.

防砂工艺和效果与完井方式有密切的关系,提出并分析了四种完井方式.在条件允许的情况下,采用裸眼砾石充填进行先期防砂完井,可以获得较好的油、气流通能力和较厚的砾石层,可下入大直径的滤砂管,这种完井方法有利于防砂.对于用射孔方式完成的井,如果预测有出砂倾向,则应采用大直径套管作为生产套管,以高密度射出大直径的孔.对于胶结差的疏松产层则建议采用渗透性人工井壁完井.

The photosynthesis、water use efficiency、biomass、nutrition、soil improving effect and wind-sand controlling effect of Caragana microphylla、C.intermedia、C.korshinskii、as well as Hedysarum leave、H.scopariumand H.fruticosumwere analyzed.Results showed that the three speciesof Hedysarum have obviously more eco-economy value thanthat ofthree ones of Caraganagenus.

通过分析小叶锦鸡儿(Caragana microphylla Lam)、中间锦鸡儿(Caragana in-termedia Kuang)、柠条锦鸡儿(Caragana korshinskii Kom)、塔落岩黄芪(Hedysarumleave Maxim)、细枝岩黄芪(Hedysarum scoparium Fisch)和山竹岩黄芪(Hedysarum fruti-cosum Pall)的光合作用、水分利用效率、生物量、营养成分、土壤改良作用和防风固沙作用,结果表明,岩黄芪属3种植物的生态经济价值明显优于锦鸡儿属3种植物。

In order to evaluate the effect of vegetation recovering measurements for the east sandy land of Yellow River in Ningxia,we conducted experiment on dustfall at different height and different distance from tuyere,and on sand trap at different height in May 20-23,2004.The applied instruments are the Horizontal Dustfall Acceptor at five heights designed by ourselves and the Vertical Sand Interceptor produced by the Agriculture and Stockbreeding College of Inner Mongolia.The underlying surfaces for experiment include...

In order to evaluate the effect of vegetation recovering measurements for the east sandy land of Yellow River in Ningxia,we conducted experiment on dustfall at different height and different distance from tuyere,and on sand trap at different height in May 20-23,2004.The applied instruments are the Horizontal Dustfall Acceptor at five heights designed by ourselves and the Vertical Sand Interceptor produced by the Agriculture and Stockbreeding College of Inner Mongolia.The underlying surfaces for experiment include bared sand dune,low-covered natural grassland,closed rehabilitating grassland,ecological controlled grassland compounding with straw-checkerboard and air seeding measurements,and recultivated farmland.Results show that the most serious wind erosion occurred on bared sand dune,the best sand controlling effect on the enclosed grasslands and the second effect on straw-checkerboard areas;the recovered farmland and the moving dunes are ready for wind erosion.

为了评价宁夏河东沙地不同生态破坏与植被恢复措施的防沙治沙效果,利用自行设计的5个高度降尘接沙仪和4台内蒙古农牧大学生产的水平输沙接沙仪,通过人工吹风的方式,于2004年5月20—23日在不同植被覆盖度的下垫面上,开展不同垂直高度和不同距离的降尘试验和不同垂直高度的沙尘粒子截留试验。植被类型为自然裸露沙丘、低覆盖度天然草场、围栏禁牧的自然恢复草场、人工草方格沙丘治理结合飞播的生态恢复治理草地及原退耕还牧的复垦农田。结果表明,裸露沙丘土壤风蚀最严重,防沙治沙以围栏禁牧效果最好,其次为草网格治理,复垦农田和流动沙丘均容易起沙。

 
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