本文選題：巖瀝青 + 低溫等離子體�。� 參考：《西南石油大學(xué)》2017年碩士論文

【摘要】：針對油井水泥環(huán)易脆裂,抗沖擊能力差的問題,本文擬將具有粘彈性的巖瀝青顆粒摻入油井水泥漿中來改善油井水泥石的力學(xué)性能。但是,巖瀝青是一種難以分散于油井水泥漿內(nèi)的憎水物質(zhì),而且其對油井水泥石性能的影響會隨著溫度的改變而改變。因此,本文首先使用低溫等離子體技術(shù)來改善巖瀝青顆粒表面的憎水性,然后探究在不同的養(yǎng)護(hù)溫度下改性巖瀝青對油井水泥石的力學(xué)性能的影響。通過紅外光譜分析和接觸角測試分別探討了等離子體處理時間、等離子體處理功率和氧氣氣體流量對低溫等離子體改性前后巖瀝青顆粒表面基團(tuán)和表面潤濕性的影響。然后研究0-4%摻量的改性巖瀝青對油井水泥漿漿體性能的影響。再研究不同養(yǎng)護(hù)溫度(30℃、60℃和90℃)下改性巖瀝青對油井水泥石力學(xué)強(qiáng)度的影響。通過測試純油井水泥石和摻有4%改性巖瀝青的油井水泥石在30℃、60℃和90℃下楊氏模量和泊松比的發(fā)展變化,研究改性巖瀝青對油井水泥石形變能力的影響。通過對純油井水泥石試樣和摻有4%改性巖瀝青的油井水泥石試樣進(jìn)行X射線衍射分析、紅外光譜分析和熱重分析來探究改性巖瀝青對油井水泥水化程度的影響。通過掃描電子顯微鏡觀察改性巖瀝青顆粒與油井水泥水化產(chǎn)物的界面粘結(jié)情況以及改性巖瀝青對裂紋發(fā)展的影響。改性結(jié)果表明:經(jīng)低溫等離子體改性后巖瀝青表面生成的磺酸基團(tuán)(-SO3H)使巖瀝青的憎水性得到明顯改善。當(dāng)處理時間、處理功率和氧氣氣體流量分別為3分鐘、100W和40Sccm時改性效果較佳,巖瀝青與水的接觸角由107°降低至32.48°。改性巖瀝青對油井水泥石抗壓強(qiáng)度的影響結(jié)果表明:改性巖瀝青的加入降低了油井水泥石的抗壓強(qiáng)度。摻有4%改性巖瀝青的油井水泥石在30℃、60℃和90℃下養(yǎng)護(hù)28天的抗壓強(qiáng)度較純油井水泥石分別降低了 11.65%、12.35%和13%。改性巖瀝青對油井水泥石抗拉強(qiáng)度的影響結(jié)果表明:改性巖瀝青對油井水泥石抗拉強(qiáng)度的影響因溫度的不同而不同。摻有4%改性巖瀝青的油井水泥石分別在30℃和60℃下養(yǎng)護(hù)28天的抗拉強(qiáng)度較純油井水泥石分別降低了 26.3%和24.8%,在90℃下改性巖瀝青摻量為4%的油井水泥石的抗拉強(qiáng)度較純油井水泥石提高了 33.1%。改性巖瀝青對油井水泥石形變能力的影響結(jié)果表明:改性巖瀝青對油井水泥石形變能力的影響因溫度的不同而不同。摻有4%改性巖瀝青的油井水泥石分別在30℃和60℃下養(yǎng)護(hù)7天的泊松比較純油井水泥石分別降低了 7.69%和3.73%,7天楊氏模量較純油井水泥石分別提高了 10%和8%;在90℃下改性巖瀝青摻量為4%的油井水泥石7天的泊松比較純水泥石提高了 7.14%,7天楊氏模量較純水泥石降低了 7.3%。改性巖瀝青對油井水泥水化程度的影響結(jié)果表明:改性巖瀝青的加入延緩了油井水泥的水化。微觀結(jié)構(gòu)分析表明:改性巖瀝青顆粒與油井水泥水化產(chǎn)物膠結(jié)良好。在30℃和60℃下,改性巖瀝青的加入不利于提高油井水泥石的形變能力;在90℃下,改性巖瀝青的加入有利于提高油井水泥石的形變能力。
[Abstract]:In view of the brittle crack and poor impact resistance of the oil well cement ring, this paper intends to mix the viscoelastic bitumen particles into the oil well cement slurry to improve the mechanical properties of the oil well cement. However, the rock bitumen is a kind of hydrophobic material which is difficult to disperse in the oil well cement slurry, and its effect on the performance of the oil well cement stone will be with the temperature. Therefore, this paper first uses low temperature plasma technology to improve the hydrophobicity of the surface of rock asphalt particles, and then explores the effect of the modified rock bitumen on the mechanical properties of the oil well cement rock at different curing temperatures. The plasma treatment time and plasma are discussed by infrared spectrum analysis and contact angle test. The effect of body treatment power and oxygen gas flow on the surface groups and surface wettability of rock bitumen before and after plasma modification at low temperature. Then the effect of Modified Rock bitumen with 0-4% content on the performance of oil well cement slurry is studied. The mechanical strength of Modified Rock bitumen under different curing temperatures (30, 60 and 90 C) is studied. By testing the development and change of the young's modulus and Poisson's ratio at 30, 60 and 90, the influence of the modified rock asphalt on the deformation capacity of the oil well cement stone by testing the cement stone of pure oil well cement and 4% Modified Rock bitumen. The effect of Modified Rock Asphalt on the hydration degree of oil well cement was investigated by X ray diffraction analysis, infrared spectrum analysis and thermogravimetric analysis. The interfacial bond between the modified rock asphalt particles and the hydration products of oil well cement and the effect of Modified Rock Asphalt on the crack development were investigated by scanning electron microscope. The results showed that the modified rock bitumen had the effect of low temperature and so on. The sulfonic group (-SO3H) generated by the surface of the modified bitumen on the surface of the bitumen made the bitumen hydrophobicity improved obviously. When treatment time, the treatment power and oxygen gas flow rate are 3 minutes respectively, the modified effect of 100W and 40Sccm is better, the contact angle of rock bitumen and water is reduced from 107 degrees to 32.48 degrees. The compressive strength of modified rock asphalt to oil well cement stone The results show that the addition of Modified Rock Asphalt reduces the compressive strength of the oil well cement stone. The compressive strength of the oil well cement stone with 4% Modified Rock bitumen at 30, 60 and 90 C reduces 11.65%, 12.35% and 13%. modified rock asphalt to the tensile strength of the oil well cement stone, respectively. The effect of the modified rock asphalt on the tensile strength of the oil well cement stone varies with the temperature. The tensile strength of the oil well cement mixed with 4% Modified Rock bitumen at 30 and 60 degrees centigrade is 26.3% and 24.8% lower than the pure oil well cement stone respectively. The tensile strength of the oil well cement stone with the modified rock asphalt content of 4% at 90 centigrade. The results of the effect of 33.1%. modified rock asphalt on the deformation capacity of oil well cement stone show that the effect of Modified Rock Asphalt on the deformation capacity of oil well cement stone varies with temperature. The oil well cement stone with 4% Modified Rock bitumen at 30 and 60 centigrade for 7 days is compared with pure oil well cement. Don't reduce 7.69% and 3.73%, and the young's modulus of the 7 days is 10% and 8% higher than that of the pure oil well cement stone. At 90 C, the cement stone with the modified rock asphalt content of 4% is 7.14% in 7 days, and the young's modulus is less than that of the pure cement. The effect of the 7.3%. modified rock asphalt on the hydration degree of the oil well cement is reduced in 7 days. The addition of Modified Rock Asphalt postponed the hydration of oil well cement. The microstructure analysis showed that the modified rock bitumen particles were cemented well with the hydration products of oil well cement. At 30 and 60 C, the addition of Modified Rock bitumen was not conducive to the improvement of the deformation ability of the oil well cement. The addition of Modified Rock bitumen at 90 C was beneficial to the improvement of oil well cement. The deformation capacity of stone.

【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ172.75

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本文編號：1788149