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摘要? 基于超分子自組裝理論,，β-環(huán)糊精,、表面活性劑與黃原膠自組裝締合而成的網(wǎng)狀結(jié)構(gòu)，可對(duì)黃原膠的抗溫,、抗鹽、抗鈣和剪切稀釋性能有較大改善,。本文運(yùn)用透射電鏡分析了自組裝體系的微觀結(jié)構(gòu)，并評(píng)價(jià)了其抗鹽,、抗鈣、抗溫及流變性能,。實(shí)驗(yàn)結(jié)果顯示，黃原膠與自組裝體系的微觀結(jié)構(gòu)有顯著差異,，自組裝體系中有明顯網(wǎng)狀結(jié)構(gòu)形成；自組裝體系的剪切稀釋性和低剪切速率下的流變性均優(yōu)于黃原膠,；自組裝體系90℃下抗NaCl達(dá)飽和(26.5%),、可抗4% CaCl2,、能抗150 ℃高溫,；以自組裝體系為核心的無土相水基鉆井液,，密度為1.6 g/cm3 時(shí),，150 ℃熱滾后,，高溫高壓濾失量為10.2 mL，體系流變性能穩(wěn)定,。研究結(jié)果表明,，超分子自組裝對(duì)黃原膠的抗溫、抗鹽,、抗鈣和剪切稀釋性有明顯改進(jìn)，擴(kuò)大了無土相水基鉆井液的應(yīng)用,。

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關(guān)鍵詞 ：黃原膠,；自組裝體系； β-環(huán)糊精,；抗鹽性,；無土相鉆井液

Abstract：

　　This paper investigated the network system self-assembled by β-cyclodextrin, surfactant and xanthan gum, based on the theory of supramolecular self-assembly, and analyzed the microstructure of the self-assembly system by Transmission Electron Microscopy(TEM), and evaluated the tolerance to temperature, salinity, calcium and its rheological properties. The network system greatly improved shear thinning and resistance to temperature, salt and calcium of xanthan gum. The microstructure difference between xanthan gum and the self-assembled system was evident, and the self-assembly system had obvious reticular conformation. The shear thinning and rheological properties of self-assembly system were superior to xanthan gum alone at low shear rates. The self-assembly system can tolerate saturated sodium chloride(26.5%), 4%CaC12 in 90 ?C and resist high temperature(150 ?C at least). Clay-free water-based drilling fluid with the self-assembly system had excellent rheological properties. The drilling fluid system with density of 1.6 g/cm3 aged at 150 ?C had excellent filtration, and the filtration loss at High Temperature and High Pressure(HTHP) was 10.2 mL. All of the results suggested that supramolecular self-assembly greatly improved tolerance to temperature, salt, calcium and improved the shear thinning properties of xanthan gum, and promoted the application of clay-free water based drilling fluid in oil fields.

Key words： xanthan gum ; self-assembly ; β-cyclodextrin ; salt-resistance ; clay-free drilling fluid

收稿日期: 2018-05-30 ????

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蔣官澄，王凱,，宣揚(yáng)，賀垠博,，宋然然. 黃原膠-β環(huán)糊精自組裝體系在無土相水基鉆井液中的應(yīng)用研究[J]. 石油科學(xué)通報(bào), 2016, 1(2): 279-285. JIANG Guancheng, WANG Kai, XUAN Yang, HE Yinbo, SONG Ranran. Preparation and application of self-assembly system based on xanthan gum and β-cyclodextrin in clay-free water based drilling fluid. 石油科學(xué)通報(bào), 2016, 1(2): 279-285.

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