本文關(guān)鍵詞：甜菜堿共聚物鉆井液降濾失劑的合成與性能研究　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鉆井液 降濾失劑 合成 性能評(píng)價(jià) 微觀機(jī)理

【摘要】：隨著油氣資源的勘探與開(kāi)發(fā)逐漸向深部地層發(fā)展,這也對(duì)鉆井液的性能提出了更高的要求。針對(duì)這一問(wèn)題,本文設(shè)計(jì)并制備了一種新型的甜菜堿型共聚物作為抗高溫耐鹽鉆井液用降濾失劑。本研究以1,3-丙烷磺內(nèi)酯和1-乙烯基咪唑?yàn)樵?合成了一種甜菜堿單體3-(3丙磺酸)丙基-1-乙烯基咪唑(VPS)。將合成甜菜堿單體VPS與AM、AMPS和DMDAAC采用自由基水溶液共聚的方式制備了一種兩性離子共聚物PVAAD作為鉆井液用降濾失劑。以PVAAD質(zhì)量分?jǐn)?shù)為1%的淡水基漿的API濾失量為評(píng)價(jià)標(biāo)準(zhǔn),采用單因素實(shí)驗(yàn)得出了具有最佳降濾失效果的合成條件。通過(guò)紅外光譜法和核磁氫譜法對(duì)PVAAD的結(jié)構(gòu)進(jìn)行了表征,結(jié)果表明合成產(chǎn)物的分子結(jié)構(gòu)與目標(biāo)產(chǎn)物一致。采用烏氏粘度計(jì)法及凝膠滲透色譜法(GPC)測(cè)試了 PVAAD的特性黏數(shù)和分子量分布。結(jié)果顯示,PVAAD的特性黏數(shù)為143.4 mL/g,其分子量主要分布在6918 g/mol到4466385 g/mol之間。性能評(píng)價(jià)實(shí)驗(yàn)表明,合成的PVAAD具有良好的降濾失性及耐溫抗鹽性能,PVAAD質(zhì)量分?jǐn)?shù)為1.25%時(shí),淡水基漿、飽和鹽水基漿及復(fù)合鹽水基漿的API濾失量分別為4.8 mL、4.0 mL和5.6 mL。考慮到PVAAD加量達(dá)到1.25%后,基漿API濾失量的下降幅度較小,故確定PVAAD作為鉆井液降濾失劑的最佳加量為1.25%。PVAAD-淡水基漿體系經(jīng)200℃老化16 h后的API濾失量為19.2 mL。PVAAD-淡水基漿體系中分別加入質(zhì)量分?jǐn)?shù)為36%的NaCl和74%的CaCl2后,二者的API濾失量分別為4.0 mL和9.0 mL,且PVAAD能有效改善基漿體系的流變性能。與6種常用的降濾失劑相比,合成的PVAAD表現(xiàn)出了更好的降濾失性及耐溫性能。PVAAD同時(shí)具有良好的抑制性能,在其質(zhì)量分?jǐn)?shù)為2.0%的淡水基漿中,四川紅土和普通泥頁(yè)巖的一次回收率分別為72.20%和92.80%。與其它降濾失劑的復(fù)配實(shí)驗(yàn)表明,JT-888、FT-1、SMC與PVAAD具有良好好的協(xié)同增效作用。復(fù)配體系研究實(shí)驗(yàn)證明,PVAAD與磺化瀝青(FT-1)、重鈣和輕鈣復(fù)配使用后的基漿體系具有較好的失水造壁性、耐溫性及流變性能,具有較好性能的配方為:1%重鈣+2%輕鈣+1.25%PVAAD +2%FT-1。適應(yīng)性能評(píng)價(jià)實(shí)驗(yàn)表明,合成的降濾失劑PVAAD與新疆油田常用的3種鉆井完井液體系都具有良好的適應(yīng)性能。且采用PVAAD等量替換3種鉆井液體系中的同類產(chǎn)品后,3種基漿體系都表現(xiàn)出了更好的降濾失及流變性能。采用掃描電鏡法和粒度分析法研究了 PVAAD作降濾失劑的微觀機(jī)理。掃描電鏡測(cè)試顯示,在淡水基漿中加入1.25%的PVAAD后,淡水基漿濾餅的表面變得更加均勻及致密。粒度分析實(shí)驗(yàn)表明,在淡水基漿中加入質(zhì)量分?jǐn)?shù)為1.25%的PVAAD后,體系中的大黏土顆粒減少,其粒度分布曲線又單峰變?yōu)殡p峰,同時(shí)0.1μm～1μm之間的小顆粒變多,這種廣泛的粒徑分布使得基漿體系中的顆粒分配趨于合理化。
[Abstract]:With the exploration and development of oil and gas resources gradually to the deep stratum development, the performance of the drilling fluid has put forward higher requirements. To solve this problem, this paper presents the design and preparation of a novel betaine type copolymer as high temperature resistant and salt drilling fluid filtrate reducer based on the 1,3-. Propane sultone and 1- vinyl imidazole, a betaine monomer to synthesize 3- (3 propane sulfonic acid) -1- propyl vinyl imidazole (VPS). The synthesis of betaine monomer VPS and AM, AMPS and DMDAAC in aqueous solution by radical copolymerization was a zwitterionic copolymer prepared by PVAAD as the drilling fluid loss agent with filtrate. Filter API of 1% fresh water base slurry to the mass fraction of PVAAD loss as evaluation standard, using the single factor experiment the synthesis condition has the best filtration effect. By infrared spectroscopy and 1H NMR spectrum structure of PVAAD was characterized, The results showed that the molecular structure of the target product with favorable synthetic product. Permeation chromatography by Ubbelohde viscometer method and gel (GPC) PVAAD characteristic viscosity and molecular weight distribution were tested. The results showed that the PVAAD characteristic viscosity is 143.4 mL/g, its molecular weight is mainly distributed in the 6918 g/mol to 4466385 g/mol show that the performance evaluation. The synthesis of PVAAD has excellent filtration property and temperature resistance and salt tolerance, PVAAD mass fraction was 1.25%, the water base slurry, filter API saturated brine mud and compound salt water base slurry loss were 4.8 mL, 4 mL and 5.6 mL. taking into account the PVAAD amount reached 1.25% after radical API slurry filtration decreased to a lesser extent, so as to determine the PVAAD fluid loss agent the optimum amount of 1.25%.PVAAD- water base slurry system by 200 c API 16 h after aging the filter loss of mass fraction were added to 19.2 mL.PVAAD- water base slurry system 36% NaCl and 74% CaCl2, API of the two filter loss were 4 mL and 9 mL, and PVAAD can effectively improve the rheological properties of slurry system. And 6 kinds of filtration reducing agent compared to synthetic PVAAD showed better filtrate loss and heat resistance.PVAAD also has good inhibiting properties, in the mass fraction of water base slurry 2%, a recovery of Sichuan clay and ordinary shale respectively show that the compound experiment 72.20% and 92.80%. and other filtration reducing agent JT-888, FT-1, SMC and PVAAD have good synergistic effect of complex ligands. Department of experimental studies show that PVAAD and sulfonated asphalt (FT-1), medium slurry were used after calcium and light calcium has good filtration properties, heat resistance and rheological properties, which has better performance of the formula is: 1% +2% +1.25%PVAAD to +2%FT-1. TSP light performance evaluation experiments indicated that the synthesis of Have to adapt to the good performance of the filtrate of 3 kinds of drilling fluid system in Xinjiang oilfield and agent PVAAD used by PVAAD. And the equivalent substitution of 3 kinds of drilling fluid system in similar products, 3 kinds of slurry system showed better fluid loss and rheological properties of scanning electron microscopy and particle size analysis. PVAAD method is used to study the microscopic mechanism of filtration reducing agent. By using scanning electron microscopy showed that the addition of 1.25% PVAAD in fresh water mud after surface fresh water mud cake becomes more uniform and compact. The grain size analysis experiments show that in fresh water mud containing 1.25% PVAAD after reduction in the system of clay particles, the particle size distribution curve is unimodal into Shuangfeng, while the small particles between 0.1 M ~ 1 m number, the particle distribution in the matrix slurry system to rationalize this broad particle size distribution.

【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】：2017
【分類號(hào)】：TE254.4

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