熱塑性塑料管材在油氣田腐蝕介質(zhì)中性能退化規(guī)律研究
發(fā)布時(shí)間：2018-07-20 17:22
【摘要】：近年來出現(xiàn)的各種熱塑性塑料管材不斷應(yīng)用于油氣田集輸環(huán)境。從高分子的角度來研究其合成性能和降解退化性能的研究是很多的。但熱塑性塑料管材在油氣田輸運(yùn)方面的特殊性以及其作為管道運(yùn)輸方面的專業(yè)性的研究較少。本課題以熱塑性塑料管材爆破測試和高溫高壓釜浸泡試驗(yàn)研究熱塑性塑料管材在油氣田腐蝕介質(zhì)中退化規(guī)律。爆破測試應(yīng)用常溫及高溫水壓爆破測試裝置,對熱塑性塑料管材進(jìn)行了不同溫度下的水壓爆破測試,測試數(shù)據(jù)分析處理后,繪制出了相應(yīng)的曲線,對比分析曲線得出熱塑性塑料管材在一定溫度,壓力下的性能退化。高溫高壓釜浸泡試驗(yàn)通過模擬油氣田環(huán)境對熱塑性塑料管材特別是內(nèi)襯層的退化失效規(guī)律進(jìn)行研究。試驗(yàn)表明溫度、壓力、時(shí)間和輸送介質(zhì)對熱塑性塑料在油氣田使用過程中的性能變化有著重要的影響。與原始試樣相比,不同溫度浸泡不同時(shí)間后的樣品隨著試驗(yàn)樣品與輸送介質(zhì)的各種化學(xué)與物理的作用,輸送介質(zhì)與熱塑性塑料發(fā)生滲入,溶脹和腐蝕效應(yīng),使得熱塑性塑料出現(xiàn)開裂、變形、起泡等現(xiàn)象。通過對試驗(yàn)前后的樣品進(jìn)行環(huán)向拉伸測試,體積變化測試,DSC測試研究了PE80、PE100、聚四氟乙烯(PTFE)、超高分子量聚乙烯(UHMWPE)、到聚四氟乙烯(PTFE)等熱塑性塑料在油氣田腐蝕介質(zhì)中的退化規(guī)律。熱塑性塑料原始樣和與油田介質(zhì)作用后的試驗(yàn)樣的環(huán)向拉伸強(qiáng)度從PE80、PE100、聚四氟乙烯(PTFE)、超高分子量聚乙烯(UHMWPE)、到聚四氟乙烯(PTFE)依次增加。并且這五種熱塑性塑料試樣與油田介質(zhì)作用后的拉伸強(qiáng)度值都明顯減小,力學(xué)性能下降。比較五種材料在浸泡前后的重量變化,溶脹率,強(qiáng)度損失率和結(jié)晶率,可見PE80在原油和H2S環(huán)境中的耐腐蝕性能較差。UHMWPE和PTFE表現(xiàn)了較強(qiáng)的原油和H2S環(huán)境適應(yīng)性。它們的材料強(qiáng)度保留率在80%左右,溶脹率符合標(biāo)準(zhǔn)要求,浸泡前后結(jié)晶變化較其他三者為低,材料的退化性能緩慢。
[Abstract]:In recent years, various thermoplastic pipes have been used in gathering and transporting environment of oil and gas fields. There are many studies on the synthetic properties and degradation properties of polymers from the point of view of polymers. However, the particularity of thermoplastic pipe in oil and gas field transportation and its specialty as pipeline transportation are few. The degradation of thermoplastic pipe in oil and gas field was studied by blasting test and immersion test in high temperature and high pressure kettle. The water pressure blasting test of thermoplastic pipe was carried out at different temperatures by using the water pressure blasting test device at room temperature and high temperature. After analyzing and processing the test data, the corresponding curve was drawn. The properties of thermoplastic pipes at a certain temperature and pressure were obtained by comparing and analyzing the curves. The degradation failure law of thermoplastic pipe, especially inner liner, was studied by simulating the environment of oil and gas field in high temperature and high pressure kettle immersion test. The results show that temperature, pressure, time and transport medium have important effects on the performance of thermoplastic in oil and gas fields. Compared with the original sample, the samples soaked at different temperatures for different time had the effect of infiltration, swelling and corrosion of the conveying medium and thermoplastic with the chemical and physical effects of the test sample and the conveying medium. Causes the thermoplastic to appear the crack, the deformation, the foaming and so on phenomenon. The degradation of PE80 PE100, PTFE, UHMWPE, PTFE and PTFE in the corrosion medium of oil and gas fields was studied by means of circumferential tensile test, volume change test and DSC test. The circumferential tensile strength of the original thermoplastic sample and the experimental sample treated with oilfield medium increased successively from PE80 PE100, PTFE, UHMWPE to PTFE. The tensile strength and mechanical properties of the five kinds of thermoplastic samples are obviously decreased after the action of the five thermoplastic samples with the oil field medium. Comparing the weight change, swelling rate, strength loss rate and crystallization rate of five kinds of materials before and after soaking, it can be seen that the corrosion resistance of PE80 in crude oil and H _ 2S environment is poor. UHMWPE and PTFE have strong adaptability to crude oil and H _ 2S environment. The strength retention rate of the materials is about 80%, the swelling rate meets the standard requirements, the crystallization changes before and after soaking are lower than those of the other three, and the degradation properties of the materials are slow.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ320.724;TE983
本文編號：2134221
[Abstract]:In recent years, various thermoplastic pipes have been used in gathering and transporting environment of oil and gas fields. There are many studies on the synthetic properties and degradation properties of polymers from the point of view of polymers. However, the particularity of thermoplastic pipe in oil and gas field transportation and its specialty as pipeline transportation are few. The degradation of thermoplastic pipe in oil and gas field was studied by blasting test and immersion test in high temperature and high pressure kettle. The water pressure blasting test of thermoplastic pipe was carried out at different temperatures by using the water pressure blasting test device at room temperature and high temperature. After analyzing and processing the test data, the corresponding curve was drawn. The properties of thermoplastic pipes at a certain temperature and pressure were obtained by comparing and analyzing the curves. The degradation failure law of thermoplastic pipe, especially inner liner, was studied by simulating the environment of oil and gas field in high temperature and high pressure kettle immersion test. The results show that temperature, pressure, time and transport medium have important effects on the performance of thermoplastic in oil and gas fields. Compared with the original sample, the samples soaked at different temperatures for different time had the effect of infiltration, swelling and corrosion of the conveying medium and thermoplastic with the chemical and physical effects of the test sample and the conveying medium. Causes the thermoplastic to appear the crack, the deformation, the foaming and so on phenomenon. The degradation of PE80 PE100, PTFE, UHMWPE, PTFE and PTFE in the corrosion medium of oil and gas fields was studied by means of circumferential tensile test, volume change test and DSC test. The circumferential tensile strength of the original thermoplastic sample and the experimental sample treated with oilfield medium increased successively from PE80 PE100, PTFE, UHMWPE to PTFE. The tensile strength and mechanical properties of the five kinds of thermoplastic samples are obviously decreased after the action of the five thermoplastic samples with the oil field medium. Comparing the weight change, swelling rate, strength loss rate and crystallization rate of five kinds of materials before and after soaking, it can be seen that the corrosion resistance of PE80 in crude oil and H _ 2S environment is poor. UHMWPE and PTFE have strong adaptability to crude oil and H _ 2S environment. The strength retention rate of the materials is about 80%, the swelling rate meets the standard requirements, the crystallization changes before and after soaking are lower than those of the other three, and the degradation properties of the materials are slow.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ320.724;TE983
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