返砂 的英文怎麼說

中文拼音 [fǎnshā]
返砂 英文
sand return
  • 返 : 動詞（回） return
  • 砂 : 名詞（沙子） sand; grit
  1. They also impede backmixing of sand.

    同時也可防止砂子的返混。
  2. Setenaly according to the analyses from selected profiles, we know that, it is cold and dry in this region during the early holocene when east asian winter monsoon ' s influence is obvious, so, it is a transition period from sand deposit to sandy soil deposit, when the layers become thinner gradually from north to south. during middle holocene, it is warm and humid, influenced evidently by east asian summer monsoon, so, it is an obivious pedogenesis, when there are generally well - developped holecene palaeosol ( so ) from north to south, and the pedogenesis in the south is better than that in the north, the soil is also thicker than that of the north. from late holocene to now, the climate changes to be dry and cold, but its changing scope is smaller than that of last glacial period

    2 、就所選剖面分析來看，本區在全新世早期氣候回返，相對較寒冷乾燥，東亞冬季風影響較明顯，此時為沙層堆積向砂質土壤過渡，自北至南堆積的沙粒漸細；全新世中期氣候溫暖濕潤，東亞夏季風影響顯著，此時為明顯的成壤期，表現在自北至南普遍可見發育較好的黑壚土層，且南部的成壤作用比北部好，土壤的厚度也要大；全新世晚期至今，氣候向乾冷方向轉化，但變化幅度遠小於末次冰期。
  3. To ascertain how to produce differential pressure reasonably during the course of high temperature and pressure gas well testing, we must consider synthetically the following situations : both liquid in well bore and solid phase particles of mud in strata can be carried out through airflow ; we must avoid sand production out of borehole walls and make the selected differential pressure meet the demands of the testing instrument capability ; the calculation of differential pressure when no sand comes out of strata covers the calculation of strength of rock of borehole walls and airflow velocity, etc

    摘要高溫高壓氣井測試中合理生產壓差的確定需要綜合考慮使氣流能夠在井筒中攜液、返排侵入地層中的泥漿固相顆粒、避免井壁出砂、滿足測試工具性能要求等；地層不出砂壓差計算還涉及到井壁巖石的強度計算、氣流流速計算等。
  4. Aiming at characteristics of serious conflict among layers, thin layers developed and scattered distribution of remaining oil, this paper introduces techniques of non - gel fracturing, multi - fractures fracturing, large discharge capacity and large sand amount fracturing, thin layer fracturing and high effective return discharge

    摘要針對大慶油田薩南開發區三類油層層間矛盾突出、油層發育薄及剩餘油分佈零散等特點，根據油藏精細地質研究成果，通過個性化壓裂設計，在試驗區三類油層聚驅挖潛過程中，應用了非凝膠壓裂、多裂縫壓裂、大排量及大砂量壓裂、薄隔層壓裂以及高效返排壓裂等配套的工藝技術。
  5. Testing study on diving dry - vibrated compacted and anti - pull stone column

    球應力往返作用下飽和砂土變形特性的試驗研究
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