本文關(guān)鍵詞：杏子川采油廠J55套管腐蝕規(guī)律及緩蝕劑防護(hù)研究　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： J55套管 腐蝕原因 腐蝕規(guī)律 緩蝕劑

【摘要】：杏子川采油廠長期存在著套管腐蝕的問題。近年來,由于油田的持續(xù)開采和注水力度的增大,使得油井產(chǎn)出液綜合含水率逐年升高,部分油井超過90%,井下套管腐蝕現(xiàn)象嚴(yán)重,對油田的正常生產(chǎn)和安全造成了巨大威脅。因此,有必要對杏子川采油廠J55套管的腐蝕因素、腐蝕機(jī)理和腐蝕規(guī)律進(jìn)行全面的分析和研究,并提出適用現(xiàn)場實際的腐蝕防護(hù)措施。 針對杏子川采油廠J55套管腐蝕嚴(yán)重的問題,選取了不同區(qū)塊共13口油井作為研究對象。通過水質(zhì)分析、腐蝕產(chǎn)物形貌和組成分析后發(fā)現(xiàn)CO2和H2S是J55套管腐蝕的主要原因,另外,Cl-、 HCO3-和SRB等對套管腐蝕也有重要影響。因此,對C02、H2S和SRB的腐蝕機(jī)理進(jìn)行了研究,并采用靜態(tài)失重法和電化學(xué)方法研究了溫度、Cl-離子濃度、HC03-離子濃度、Ca2+和Mg2+離子濃度、pH和時間對J55鋼腐蝕的作用規(guī)律,研究發(fā)現(xiàn)不同腐蝕影響因素的作用規(guī)律都有其各自的特征。 結(jié)合杏子川采油廠現(xiàn)場實際,選用了油田常用的10種緩蝕劑進(jìn)行篩選,并對初選劑進(jìn)行了復(fù)配以提高緩蝕效果。實驗發(fā)現(xiàn)油酸基咪唑啉KLYS-A和咪唑啉季銨鹽CRS2-7按體積比3比1復(fù)配后,在投加量120ppm時靜態(tài)失重實驗緩蝕率可達(dá)90%以上,經(jīng)成膜性能和電化學(xué)測試,復(fù)配緩蝕劑都具有良好的緩蝕效果。利用雷諾相似的原理制定了動態(tài)實驗方案,設(shè)計了實驗裝置,研究了動態(tài)條件下溫度和流速對復(fù)配緩蝕劑緩蝕率的影響。研究發(fā)現(xiàn)動態(tài)條件下復(fù)配緩蝕劑的緩蝕率較低,這與動態(tài)時介質(zhì)對試片表面緩蝕劑保護(hù)膜的破壞有關(guān)。對現(xiàn)場王214-5井投加復(fù)配緩蝕劑后,發(fā)現(xiàn)腐蝕速率和鐵離子濃度都明顯減小,J55套管得到了良好的保護(hù)。
[Abstract]:Apricots Sichuan oil extraction plant long-term existence of casing corrosion problems. In recent years, due to the continuous increase oil production and water injection intensity, the oil output liquid water rate increased year by year, more than 90% wells, downhole casing corrosion phenomenon is serious, a huge threat to the safety and normal production of oilfield. Therefore, it is necessary to corrosion the factors of xingzichuan oil production plant of J55 casing, comprehensive analysis and Research on corrosion mechanism and law, and put forward the practical corrosion protection measures for the scene.
The apricots Sichuan oil extraction plant J55 casing corrosion serious problem, select a different block 13 wells as the research object. Through the analysis of water quality, corrosion morphology and composition analysis revealed that CO2 and H2S are the main reasons of casing corrosion in J55, Cl-, HCO3- and SRB on casing corrosion has important effect. Therefore, the C02 corrosion mechanism of H2S and SRB were studied, and the temperature was studied by static weight loss method and electrochemical method, Cl- concentration, HC03- concentration, Ca2+ and Mg2+ concentrations, pH rule and time on the corrosion of J55 steel, the research discovered the law of the effect of different corrosion factors are the features of their own.
Combining with the actual apricots Sichuan oil extraction plant, the oil commonly used 10 kinds of inhibitors were screened, and the primary agent was mixed to improve the inhibition effect. The experimental results showed that oleic acid imidazoline KLYS-A and imidazoline quaternary ammonium salt CRS2-7 according to the volume ratio of 3 to 1 respectively, when the dosage of 120ppm when the static weight loss test corrosion corrosion rate is above 90%, the film-forming properties and electrochemical test, the inhibitor has good corrosion inhibition effect. Using the principle of similar Reynolds developed dynamic experiment scheme, experimental device design, studied under dynamic conditions of temperature and flow rate on the rate of corrosion inhibitor. The study found that dynamic under the condition of the inhibitor the corrosion inhibition rate is low, and the dynamic media on specimen surface corrosion inhibitor film damage. The king of 214-5 wells adding inhibitor, found that the corrosion rate and iron ion concentration are obvious Reduced, the J55 casing has been well protected.

【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】：2015
【分類號】：TE983

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉學(xué)勤;;犧牲陽極保護(hù)技術(shù)在中原油田的應(yīng)用[J];材料保護(hù);1991年12期

2 趙景茂,左禹,熊金平,田連朋;pH值對低碳鋼在高含鹽污水中的腐蝕影響[J];材料保護(hù);2001年07期

3 張軍;趙文軫;來維亞;;油田水中J55鋼的腐蝕行為[J];材料保護(hù);2010年10期

4 宋曰海,郭忠誠,樊愛民,龍晉明;犧牲陽極材料的研究現(xiàn)狀[J];腐蝕科學(xué)與防護(hù)技術(shù);2004年01期

5 李黨國;馮耀榮;白真權(quán);鄭茂盛;;Cl-對N80鋼在CO_2水溶液中腐蝕行為的影響[J];腐蝕科學(xué)與防護(hù)技術(shù);2007年05期

6 陳林;隋新光;陶加勝;李福軍;;大慶油田油水井套管手鐲陽極防腐技術(shù)的應(yīng)用[J];腐蝕科學(xué)與防護(hù)技術(shù);2007年06期

7 嚴(yán)密林,趙國仙,路民旭,龔偉安,趙文;8種J55套管在長慶油田洛河水中的耐蝕性評價[J];腐蝕與防護(hù);1999年06期

8 龍鳳樂,鄭文軍,陳長風(fēng),許振清,韓慶;溫度、CO_2分壓、流速、pH值對X65管線鋼CO_2均勻腐蝕速率的影響規(guī)律[J];腐蝕與防護(hù);2005年07期

9 張學(xué)元,余剛,王鳳平,杜元龍;Cl~-對API P105鋼在含CO_2溶液中的電化學(xué)腐蝕行為的影響[J];高等學(xué)�；瘜W(xué)學(xué)報;1999年07期

10 姜守華;油井套損機(jī)理綜述[J];國外油田工程;2001年12期

，

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