本文選題：硫酸鋇垢 + 結(jié)垢機(jī)理　； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：目前,我國(guó)許多油田已進(jìn)入開發(fā)中后期,隨著注水開發(fā)的深入,結(jié)垢問題已嚴(yán)重影響了油田的正常生產(chǎn)。本文在調(diào)研大量文獻(xiàn)基礎(chǔ)上,闡述了硫酸鋇垢結(jié)垢機(jī)理及化學(xué)阻垢機(jī)理,并對(duì)硫酸鹽結(jié)垢預(yù)測(cè)模型進(jìn)行了研究。以上述理論為研究基礎(chǔ),針對(duì)華慶油田硫酸鋇結(jié)垢問題,開展了硫酸鋇垢結(jié)垢影響因素及阻垢效果實(shí)驗(yàn)研究。 根據(jù)華慶油田注入水與地層水離子分析數(shù)據(jù),選擇具有代表性的兩口井,對(duì)硫酸鋇結(jié)垢影響因素及變化趨勢(shì)進(jìn)行理論預(yù)測(cè)及實(shí)驗(yàn)研究,結(jié)果表明：注入水與地層水以3：7混合時(shí),硫酸鋇結(jié)垢量最大；隨著溫度的升高,硫酸鋇結(jié)垢量逐漸減�。粔毫�、pH值的變化對(duì)硫酸鋇結(jié)垢量的影響很��；隨著Ba2+、SO42-成垢離子濃度的增加,硫酸鋇結(jié)垢量也隨之增加；隨著礦化度的升高,硫酸鋇結(jié)垢量呈下降趨勢(shì)。實(shí)驗(yàn)結(jié)果與利用Scalechem結(jié)垢預(yù)測(cè)軟件預(yù)測(cè)的結(jié)果基本一致。 通過阻垢劑篩選及評(píng)價(jià)實(shí)驗(yàn)研究,篩選出了阻垢效果較好的阻垢劑TH-1及復(fù)配阻垢劑(阻垢劑DTPMP、TH-1、TH-607B的復(fù)配比為1:2:1, DTPMP、TH-1復(fù)配比為2：1),阻垢劑濃度均為120mg/L。通過阻垢效果及影響因素實(shí)驗(yàn)研究,得到了各因素對(duì)阻垢效果的影響趨勢(shì)：隨阻垢劑濃度的增加,阻垢率增大；當(dāng)阻垢劑濃度一定時(shí),隨著Ba2+、SO42-離子濃度的升高,阻垢率呈降低趨勢(shì)；隨著礦化度的升高,阻垢率呈先增大再逐漸平穩(wěn)的趨勢(shì)；隨著溫度的升高,阻垢率先明顯增大后逐漸降低；pH值為中性時(shí)阻垢率最大；壓力對(duì)阻垢效果影響甚微。在上述研究成果的基礎(chǔ)上,開展了影響硫酸鋇阻垢效果正交實(shí)驗(yàn)研究,阻垢效果影響因素的大小順序?yàn)椋築a2+濃度礦化度pH值SO42-濃度溫度。 本文綜合各項(xiàng)研究成果,制定了適合華慶油田部分井的阻垢方案并且設(shè)計(jì)出了現(xiàn)場(chǎng)阻垢劑加注工藝方案。
[Abstract]:At present, many oil fields in our country have entered the middle and late development of the development. With the deepening of water injection development, the scaling problem has seriously affected the normal production of oil fields. Based on a large number of literatures, this paper expounds the mechanism of scale scaling and chemical scale inhibition mechanism of barium sulfate scale, and studies the prediction model of sulfate scaling. The above theory is the research base. Based on the problem of barium sulfate scaling in Huaqing oilfield, the influence factors and scale inhibition effect of barium sulfate scaling were studied.
According to the analysis data of the injected water and the formation water ion of the Huaqing oilfield, the representative two wells are selected and the influence factors and the changing trend of barium sulfate scaling are predicted and studied. The results show that the barium sulfate scale is the largest when the injected water is mixed with the formation water with 3:7, and the scale of barium sulfate scaling gradually along with the increase of temperature. The effect of pressure and pH on the scale of barium sulfate scaling is small; with the increase of Ba2+, SO42- scale ion concentration, the scale of barium sulfate scaling increases, and the scale of barium sulfate scaling decreases with the increase of salinity. The result of the experiment is basically consistent with the result of prediction by using Scalechem scaling software.
Through the screening and evaluation of the scale inhibitor, the scale inhibitor TH-1 and the compound scale inhibitor (scale inhibitor DTPMP, TH-1, TH-607B, 1:2:1, DTPMP, TH-1 compound ratio are 2:1) are screened out, and the concentration of the scale inhibitor is 120mg/L. through the scale inhibition effect and the effect of influence on the scale, and the effect of the scale inhibition is obtained. Influence trend: as the concentration of scale inhibitor increases, the scale of scale inhibition increases; when the concentration of scale inhibitor is fixed, the scale of scale inhibition decreases with the increase of Ba2+ and SO42- ion concentration; with the increase of salinity, the scale of scale inhibition increases first and then gradually steadily; as the temperature rises, the scale of scale increases gradually and then decreases gradually; the pH value is the same. On the basis of the above research results, the orthogonal experimental study on the effect of barium sulfate scale inhibition effect was carried out on the basis of the above research results. The size order of the influence factors of the scale inhibition effect was Ba2+ concentration pH SO42- concentration temperature.
Based on the research results, a scale inhibition scheme suitable for some wells in Huaqing oilfield has been worked out, and the on-site scale inhibitor filling process scheme has been designed.

【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE357.61

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本文編號(hào)：1803084