Effects of Acrylamide Copolymer in Fluid Loss Property on Oil Well Cementing

N. J. Maduelosi, F. Chuku
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Abstract

The effects of varying concentration of Acrylamide copolymer (an effective fluid loss control additive) and temperature on fluid loss in oil well cementing was studied. The fluid loss of neat cement (Dyckerhoff Class G), fluid loss property of cement slurry with varying concentration of acrylamide copolymer, and effects of temperature in cement slurry with acrylamide copolymer were investigated at temperature range of 48-82oC bottom hole circulating temperature and pressure of 3500 psi. The concentrations of the copolymer studied were 0.25, 0.50 and 0.75 percentage by weight of cement. Thickening time tests were also carried out. The fluid loss value decreased with increase in concentration of acrylamide irrespective of the temperature. At low concentration of the additive, the activity of the copolymer as a fluid loss additive was influenced by temperature. The findings from the research show that fluid loss of cement with the copolymer is a function of temperature and concentration of the copolymer.
丙烯酰胺共聚物对油井固井失滤性能的影响
研究了不同浓度的丙烯酰胺共聚物(一种有效的降滤失剂)和温度对油井固井滤失的影响。在井底循环温度为48 ~ 82℃、压力为3500 psi的条件下,研究了纯水泥(Dyckerhoff G类)的失滤性能、不同浓度丙烯酰胺共聚物水泥浆的失滤性能以及温度对含丙烯酰胺共聚物水泥浆失滤性能的影响。所研究的共聚物的浓度分别为水泥重量的0.25%、0.50%和0.75%。并进行了增稠时间试验。失液值随丙烯酰胺浓度的增加而降低,与温度无关。在低浓度下,共聚物作为降滤失剂的活性受温度的影响。研究结果表明,掺有共聚物的水泥失液是温度和共聚物浓度的函数。
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