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  本文選題：注水開發(fā)　切入點：碳酸鈣垢　出處：《西南石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著石油天然氣開采速度的加快,注水開發(fā)的深入,產(chǎn)出液中的含水率越來越高,油田水結(jié)垢問題對油田的正常生產(chǎn)造成的影響越來越明顯。本文以酒東油田水分析資料為基礎(chǔ)資料,開展結(jié)垢理論預(yù)測和實驗研究。研究結(jié)果表明,地層結(jié)垢主要為碳酸鈣垢,混配比、pH值及溫度是影響地層結(jié)垢的主要因素,C02含量及礦化度影響次之,壓力對地層結(jié)垢影響較小。 根據(jù)酒東油田注水過程中的結(jié)垢類型,進(jìn)行了阻垢劑類型優(yōu)選實驗研究。實驗結(jié)果可知：注入水與地層水以2：8混合時,TH-607B阻垢效果最好；產(chǎn)出污水與地層水以4：6混合時,DTPMP阻垢效果最好；注入水與產(chǎn)出污水與地層水以0.4：3.6：6混合時,DTPMP阻垢效果最好。由阻垢效果評價實驗結(jié)果得出：隨著阻垢劑濃度升高,阻垢率先升高后降低；伴隨流體溫度的升高,阻垢率降低；壓力對阻垢效果影響較��；pH值在中性時,阻垢劑阻垢效果最佳；隨著C02含量增加,阻垢效果也有所增加但效果不明顯；礦化度在5.5g/L時,阻垢效果最好。綜合上述實驗結(jié)果,得到適用于酒東油田注水開發(fā)過程中的阻垢劑類型及阻垢劑最佳用量。 為了提高阻垢劑的阻垢效果,開展了復(fù)配阻垢劑對阻垢效果的影響研究。通過實驗結(jié)果可知,復(fù)配比例為1：1及濃度為80mg/L時,復(fù)配阻垢劑TH-607B/DTPMP和TH-1/DTPMP優(yōu)于其他復(fù)配類型。不同因素下復(fù)配阻垢劑與單一阻垢劑對阻垢效果影響趨勢一樣,但是阻垢效果要好于單一阻垢劑。在考慮經(jīng)濟(jì)因素的情況下,酒東油田應(yīng)盡量的使用復(fù)配阻垢劑,為酒東油田化學(xué)防垢提供理論及實驗依據(jù)。
[Abstract]:With the acceleration of oil and natural gas production and the deepening of water injection development, the water cut in the output liquid is getting higher and higher. The influence of scaling problem on the normal production of oil field is more and more obvious. Based on the water analysis data of Jiudong Oilfield, the scaling theory prediction and experimental study are carried out. The results show that the formation scaling is mainly calcium carbonate scale. The pH value and temperature are the main factors which affect the formation scaling. The second is the content of C02 and the degree of mineralization, but the pressure has little effect on the formation scaling. According to the scaling types in the process of water injection in Jiudong Oilfield, the optimum selection of scale inhibitor was carried out. The experimental results show that the scale inhibition effect of TH-607B is the best when the mixture of injected water and formation water is 2: 8; The scale inhibition effect of DTPMP is the best when the mixture of produced sewage and formation water is 4: 6, and the effect of DTPMP is the best when the mixture of injected and produced sewage and formation water is 0.4: 3.6: 6. The experimental results of scale inhibition evaluation show that the scale inhibition effect increases with the increase of scale inhibitor concentration. With the increase of fluid temperature, the scale inhibition rate decreased. When the pressure had little effect on the scale inhibition effect, when pH value was neutral, the scale inhibitor had the best scale inhibition effect; with the increase of CO2 content, the scale inhibitor had the best scale inhibition effect. When the salinity is 5.5 g / L, the scale inhibition effect is the best. Based on the above experimental results, the type of scale inhibitor and the optimum amount of scale inhibitor suitable for water injection development in Jiudong Oilfield are obtained. In order to improve the scale inhibition effect of the scale inhibitor, the influence of the compound scale inhibitor on the scale inhibition effect was studied. The experimental results show that when the ratio of scale inhibitor is 1: 1 and the concentration is 80 mg / L, The effect of compound scale inhibitor TH-607B/DTPMP and TH-1/DTPMP on scale inhibition effect is the same as that of single scale inhibitor under different factors, but the scale inhibition effect is better than that of single scale inhibitor. In order to provide theoretical and experimental basis for chemical scale prevention in Jiudong Oilfield, the compound scale inhibitor should be used as far as possible.
【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】：TE357.6

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本文編號：1590596