微米化重晶石濃漿用梳型聚合物分散劑的合成及應用
發(fā)布時間：2018-10-05 07:14
【摘要】：目前全世界范圍內中淺層的石油資源已基本枯竭,現(xiàn)在石油勘探的趨勢逐步往陸地深層、海洋深層以及環(huán)境惡劣的區(qū)域發(fā)展,所以對高密度鉆井液的研究提出了更高的要求。高密度鉆井液研究中最突出的問題是如何調控流變性與沉降穩(wěn)定性之間的矛盾。常規(guī)API重晶石在使用過程中常常會出現(xiàn)因流變性難以控制和固相沉降導致卡鉆等嚴重問題。為了解決這些難題可以使普通API重晶石微米化改性,使其平均粒徑小于10μm,這種微米化改性的新型重晶石可以解決深井、大位移井和斜井中出現(xiàn)的重晶石沉降與流變性難以控制之間的矛盾。由于石油鉆井過程中常常會遇到鹽膏層,電解質污染是不可避免的,所以研發(fā)一種既能很好地分散重晶石又能有很好的抗鹽能力(耐鹽NaCl含量大于30%)的新型分散劑是十分迫切的。所以本論文通過水溶液自由基聚合的方法合成了一種不僅分散效果好,又能抗鹽的梳型聚合物重晶石分散劑,并用行星球磨機濕磨API重晶石的方式制備出了聚合物包覆的微米化重晶石濃漿體系。本論文的主要內容包括：1.梳型聚合物的合成及表征本文通過取大單體異戊烯醇聚氧乙烯醚(TPEO)或烯丙醇聚氧乙烯醚(APEO)溶于水中,再配以丙烯酸(AA)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)兩種單體,采用水溶液自由基聚合法得到梳型聚合物分散劑。紅外光譜、核磁分析表征了聚合物結構中存在各單體官能團,證實了梳型結構；利用元素分析法確定了聚合物中元素比例,進而計算各結構單元所占比例；利用凝膠色滲透譜儀測試的梳型聚合物分子量在1-2萬左右。2.微米化重晶石濃漿的制備及濃漿性能的測試本文利用行星球磨機濕磨API重晶石的方式制備出了固含量高達80%的(2.5g/cmm3)聚合物包覆的微米化重晶石濃漿體系,并用光學顯微鏡證實了顆粒平均粒徑已小于2μm。將濃漿體系用Haake流變儀測試流變性,并與使用直鏈型重晶石分散劑制備出來的濃漿體系的流變性進行了對比,證實了梳型聚合物分散劑的超強的分散能力和極強的抗鹽能力。M-I公司水基鉆井液用微米化重晶石濃漿體系最高密度為2.2g/cm3,并且表觀粘度為100 mPa.s,而本論文研制的微米化重晶石濃漿體系密度高達2.5g/cm3,表觀粘度僅為35 mPa.S。本論文還提供了使用流變儀來預測重晶石濃漿體系沉降趨勢的方法及思路,為我們進一步在高密度水基鉆井液中更理想地使用微米化重晶石提供了一些理論依據(jù)。3.梳型聚合物與重晶石的相互作用研究本文通過吸附、Zeta電勢以及流變學等表征手段,研究不同支鏈密度、長度的梳型聚合物對重晶石分散體系的影響。聚合物通過羧酸與磺酸基團與重晶石顆粒表面鋇離子(Ba2+)以形成配位鍵的方式吸附在重晶石表面,同時側鏈向外伸展在水溶液中。隨聚合物濃度的增加,聚合物在粘土表面的吸附量增加,顆粒的Zeta電勢絕對值也相應增加。對照體系流變實驗結果,發(fā)現(xiàn)側鏈長度的增加,對顆粒表面Zeta電位絕對值的增加貢獻不大,并且長的側鏈能使重晶石分散體系粘度降低,同時使其體系結構強度降低,即梳型聚合物對重晶石體系具有良好的分散特性。
[Abstract]:At present, the shallow petroleum resources in the world have dried up basically, and now the trend of oil exploration has gradually developed to the deep, deep and bad regions of the land, so the research of high-density drilling fluid has put forward higher requirements. The most prominent problem in the research of high density drilling fluid is how to regulate the contradiction between rheological property and settlement stability. In the process of use, the conventional API Barite often has serious problems such as difficult control of rheological property and settlement of solid phase. In order to solve these problems, it is possible to make the average particle size smaller than 10. m As the salt paste layer is often encountered during petroleum drilling, electrolyte pollution is inevitable, so it is very urgent to develop a new type of dispersant which has good salt resistance (salt tolerance NaCl content greater than 30%). In this paper, an aqueous solution free radical polymerization method is used to synthesize a kind of comb-type polymer Barite dispersing agent with good dispersion effect and anti-salt, which is prepared by wet milling API Barite with planetary ball mill. The main contents of this thesis include: 1. The synthesis and characterization of comb-type polymers is characterized by taking macromonomer isoamylene alcohol polyoxyethylene ether (TPEO) or allyl alcohol polyoxyethylene ether (APEO) in water, and mixing with acrylic acid (AA), 2-propynyl-2-methylpropanic acid (AMPS) monomers, A comb-type polymer dispersant was obtained by free radical polymerization of aqueous solution. The IR spectrum and nuclear magnetic analysis characterize the monomer functional groups in the polymer structure, confirm the comb-type structure, determine the proportion of elements in the polymer by elemental analysis, and then calculate the proportion of the structural units. The molecular weight of comb polymer tested by gel-color penetration spectrometer is about 1-20,000. In this paper, the preparation and slurry properties of micron Barite thick slurry were studied. Using the method of wet milling API Barite of planetary ball mill, the paper prepared a micron-sized Barite thick slurry system with high solid content up to 80% (2.5g/ cmm3). The results show that the average particle size of the particles is less than 2. m The strong dispersing ability and extremely strong salt resistance of the comb-type polymer dispersing agent are confirmed. The highest density of M-I water-based drilling fluid for water-based drilling fluid is 2.2g/ cm3, and the density is 100 mPa.s. The density of the micron-sized Barite concentrate system developed in this paper is up to 2.5g/ cm3, and the density is only 35mPa.s. This paper also provides a method and a train of thought for predicting the settlement tendency of a Barite thick slurry system using a rheometer, which provides some theoretical basis for the more ideal use of micro barytes in high density water-based drilling fluid. The effect of comb-type polymer with different branch density and length on the dispersion system of Barite was studied by means of adsorption, Zeta potential and rheology. The polymer is adsorbed on the surface of the Barite by ionic (Ba2 +) with the surface of the sulfonic acid group and the particle surface of the Barite particles, while the side chains extend outward in the aqueous solution. As the concentration of the polymer increases, the amount of adsorption of the polymer on the surface of the clay increases, and the absolute value of the Zeta potential of the particles also increases accordingly. According to the rheological experiment results of the control system, the increase of the length of the side chain is found, the increase of the absolute value of the Zeta potential of the particle surface is not large, and the long side chain can reduce the viscosity of the Barite dispersion system, and meanwhile, the structure strength is reduced, that is, comb-type polymer has good dispersing property on the Barite system.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE254.4
本文編號：2252488
[Abstract]:At present, the shallow petroleum resources in the world have dried up basically, and now the trend of oil exploration has gradually developed to the deep, deep and bad regions of the land, so the research of high-density drilling fluid has put forward higher requirements. The most prominent problem in the research of high density drilling fluid is how to regulate the contradiction between rheological property and settlement stability. In the process of use, the conventional API Barite often has serious problems such as difficult control of rheological property and settlement of solid phase. In order to solve these problems, it is possible to make the average particle size smaller than 10. m As the salt paste layer is often encountered during petroleum drilling, electrolyte pollution is inevitable, so it is very urgent to develop a new type of dispersant which has good salt resistance (salt tolerance NaCl content greater than 30%). In this paper, an aqueous solution free radical polymerization method is used to synthesize a kind of comb-type polymer Barite dispersing agent with good dispersion effect and anti-salt, which is prepared by wet milling API Barite with planetary ball mill. The main contents of this thesis include: 1. The synthesis and characterization of comb-type polymers is characterized by taking macromonomer isoamylene alcohol polyoxyethylene ether (TPEO) or allyl alcohol polyoxyethylene ether (APEO) in water, and mixing with acrylic acid (AA), 2-propynyl-2-methylpropanic acid (AMPS) monomers, A comb-type polymer dispersant was obtained by free radical polymerization of aqueous solution. The IR spectrum and nuclear magnetic analysis characterize the monomer functional groups in the polymer structure, confirm the comb-type structure, determine the proportion of elements in the polymer by elemental analysis, and then calculate the proportion of the structural units. The molecular weight of comb polymer tested by gel-color penetration spectrometer is about 1-20,000. In this paper, the preparation and slurry properties of micron Barite thick slurry were studied. Using the method of wet milling API Barite of planetary ball mill, the paper prepared a micron-sized Barite thick slurry system with high solid content up to 80% (2.5g/ cmm3). The results show that the average particle size of the particles is less than 2. m The strong dispersing ability and extremely strong salt resistance of the comb-type polymer dispersing agent are confirmed. The highest density of M-I water-based drilling fluid for water-based drilling fluid is 2.2g/ cm3, and the density is 100 mPa.s. The density of the micron-sized Barite concentrate system developed in this paper is up to 2.5g/ cm3, and the density is only 35mPa.s. This paper also provides a method and a train of thought for predicting the settlement tendency of a Barite thick slurry system using a rheometer, which provides some theoretical basis for the more ideal use of micro barytes in high density water-based drilling fluid. The effect of comb-type polymer with different branch density and length on the dispersion system of Barite was studied by means of adsorption, Zeta potential and rheology. The polymer is adsorbed on the surface of the Barite by ionic (Ba2 +) with the surface of the sulfonic acid group and the particle surface of the Barite particles, while the side chains extend outward in the aqueous solution. As the concentration of the polymer increases, the amount of adsorption of the polymer on the surface of the clay increases, and the absolute value of the Zeta potential of the particles also increases accordingly. According to the rheological experiment results of the control system, the increase of the length of the side chain is found, the increase of the absolute value of the Zeta potential of the particle surface is not large, and the long side chain can reduce the viscosity of the Barite dispersion system, and meanwhile, the structure strength is reduced, that is, comb-type polymer has good dispersing property on the Barite system.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE254.4
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