本文關(guān)鍵詞：塔中地區(qū)鷹山組碳酸鹽巖酸巖反應(yīng)規(guī)律研究　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： 膠凝酸 溫控變黏酸 傳質(zhì) 流變 酸巖反應(yīng)

【摘要】：酸化壓裂是塔中地區(qū)儲層改造的重要技術(shù)手段。該地區(qū)常用膠凝酸和溫控變黏酸提高酸蝕距離,溝通儲集空間。但目前國內(nèi)外學(xué)者對于膠凝酸和溫控變黏酸酸巖反應(yīng)規(guī)律的研究并不深入,不能為酸壓設(shè)計(jì)提供有效數(shù)據(jù),嚴(yán)重影響了施工效果,因此有必要深入研究膠凝酸、溫控變黏酸與灰?guī)r的酸巖反應(yīng)規(guī)律。 本文在廣泛調(diào)研國內(nèi)外關(guān)于酸巖反應(yīng)理論與實(shí)驗(yàn)研究現(xiàn)狀的基礎(chǔ)上,通過引用Mitschka旋轉(zhuǎn)圓盤對流擴(kuò)散速度場模型,在酸巖反應(yīng)受傳質(zhì)控制的條件下,考慮了酸液剪切稀釋性對傳質(zhì)的影響,建立了反應(yīng)表面酸液的H+傳質(zhì)模型,得到了反應(yīng)表面酸液剪切速率、H+有效擴(kuò)散系數(shù)、酸巖反應(yīng)動力學(xué)參數(shù)和反應(yīng)活化能的理論計(jì)算方法。 流變性能測試發(fā)現(xiàn),膠凝酸與溫控變黏酸普遍表現(xiàn)為非牛頓剪切稀釋性流體。溫度、酸濃度對膠凝酸的表觀黏度影響不大。隨著稠化劑濃度的增大,膠凝酸表觀黏度增大。而溫控變黏酸的表觀黏度受其交聯(lián)度的控制,溫度越低、酸濃度越小時,溫控變黏酸的交聯(lián)度越小,可能會出現(xiàn)未交聯(lián)現(xiàn)象；溫度越高、酸濃度越大時,溫控變黏酸的交聯(lián)度越大,可能會出現(xiàn)過交聯(lián)、破膠現(xiàn)象。 酸巖反應(yīng)動力學(xué)實(shí)驗(yàn)發(fā)現(xiàn),酸巖反應(yīng)速率與剪切速率的關(guān)系均可以用二項(xiàng)式表示,可以預(yù)測表面反應(yīng)速率,溫度、酸濃度影響溫控變黏酸H+傳質(zhì)速率的主要原因是其影響溫控變黏酸的黏度。而溫度、酸濃度影響膠凝酸酸巖反應(yīng)速率的主要原因是其對H+活躍程度的直接影響。最后計(jì)算得到了不同實(shí)驗(yàn)條件下膠凝酸和溫控變黏酸的H+有效擴(kuò)散系數(shù)、酸巖反應(yīng)動力學(xué)參數(shù)；得到了膠凝酸與灰?guī)r的反應(yīng)活化能為18.0357kJ/mol,溫控變黏酸與灰?guī)r的反應(yīng)活化能為22.1656kJ/mol。 研究表明,對于酸巖反應(yīng)規(guī)律,必須結(jié)合酸液黏度變化來分析才能得到準(zhǔn)確的認(rèn)識。酸壓施工時,應(yīng)該結(jié)合該工區(qū)的酸巖反應(yīng)規(guī)律,這樣才能設(shè)計(jì)出有效的施工程序,保證酸壓工藝效果。
[Abstract]:Acid fracturing is an important technical means for reservoir in Tazhong area. The commonly used gelling acid and temperature control in the area of variable viscosity acid acid to improve the communication distance, reservoir space. But the research scholars at home and abroad for gelled acid and temperature controlled variable viscosity acid rock reaction rules are not deep, cannot provide effective data for acid fracturing the design, has seriously affected the construction effect, it is necessary to study the law of gelled acid, acid rock reaction temperature variable viscosity acid and limestone.
Based on the extensive research at home and abroad on the acid rock reaction theory and experimental study on the basis of the status quo, by referencing the Mitschka rotating disc convection diffusion velocity model in acid rock reaction by mass transfer controlled conditions, considering the effect of acid fluid shear thinning on mass transfer, established the H+ model of mass transfer surface acid reaction. The surface acid reaction H+ shear rate, effective diffusion coefficient, calculation of acid rock reaction kinetic parameters and reaction activation energy theory method.
Rheological properties test found that gelled acid and temperature variable viscosity acid generally showed non Newtonian shear thinning fluid. Temperature, acid concentration on the apparent viscosity of gelled acid has little effect. With the increase of thickener concentration, the apparent viscosity increases gelled acid. And the temperature controlling variable viscosity and apparent viscosity by acid control of the cross-linking degree, the lower the temperature, acid concentration decreased, temperature controlled variable viscosity acid crosslinking degree is small, there may be no cross-linking phenomenon; the higher the temperature is, the greater the acid concentration, temperature and variable viscosity acid crosslinking degree bigger, there may be cross, gel breaking phenomenon.
It is found that the dynamic experiment of acid rock reaction, acid rock reaction rate and shear rate all can use the binomial that can predict the surface reaction rate, temperature, acid concentration mainly affect the temperature control of variable viscosity acid H+ transfer rate is the influence of temperature variable viscosity acid viscosity. While the temperature, acid concentration of main factors affecting the gelling acid rock reaction rate was the most direct influence degree of H+. The final calculation of gelled acid and temperature under different experimental conditions of variable viscosity acid H+ effective diffusion coefficient is obtained. The kinetic parameters of acid rock; the gelled acid and limestone reaction activation energy is 18.0357kJ/mol, temperature controlled variable viscosity acid and limestone the reaction activation energy is 22.1656kJ/mol.
Research shows that for acid rock reaction law, we must combine acid viscosity analysis to get accurate understanding. When acid fracturing is applied, we should combine the acid rock reaction rule in this area, so as to design effective construction procedures and ensure the effect of acid fracturing process.

【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】：TE357.2

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