羟丙基胍胶在高岭土上的吸附性质研究
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摘要
胍胶压裂液是油田上应用最广泛的压裂液,但压裂后需要破胶返排,会对地层造成伤害,破胶液吸附是造成地层伤害的一个重要因素。本研究选取羟丙基胍胶(HPG),建立了胍胶破胶液含量的测定方法,在此基础上研究其在高岭土上的吸附行为。利用胍胶与纤维素结构相似的特性,建立了HPG含量的测定方法。HPG在高岭土上的吸附量为7.1 mg/g,吸附行为符合Langmuir吸附等温线。傅里叶变换红外光谱(FTIR)表征说明HPG吸附在高岭土上发生的是物理吸附; X-射线衍射(XRD)证实了吸附过程中HPG进入了高岭土的内部,说明了HPG在高岭土上的吸附行为是物理吸附、内部吸附、Langmuir吸附。对不同的影响因素(温度,p H值,盐类,醇类,聚合物)进行了考察。结果表明,HPG在高岭土上的吸附量随着p H值的增加而增大,但是不随温度的升高而变化; MgCl2和Ca Cl2能够降低吸附量,Na Cl、KCl、Na2SO4和Na3PO4能够使吸附量增加,其中KCl对吸附量的影响最大;一元醇的加入不改变吸附量,而多元醇能够使吸附量增加;聚合物的加入使吸附量降低。
Guar gum fracturing fluid is most widely used fracturing fluid in oilfield,but it needs gel breaking and flowback after fracturing,which causes damage to the formation. The adsorption of gel-breaking solution is an important aspect of formation damage. In this work,hydroxypropyl guar gum( HPG) was selected for determining the concentration of guar gum solution. The adsorption behavior of HPG on the kaolin was studied.The determination method of HPG concentration was established by the similar structure of guar gum and cellulose. The result showed that the adsorption amount of HPG on kaolin was 7.1 mg/g,and the adsorption behavior followed the Langmuir adsorption isotherm. FTIR results showed that the HPG adsorption on kaolin was physical adsorption. XRD characterization confirmed the adsorption of HPG into kaolin inside. In summary,the adsorption of HPG onto kaolin was physical adsorption,inside adsorption and monolayer adsorption. Finally,different influencing factors( temperature,p H,salts,alcohols,polymers) were studied.The results showed that the adsorption of HPG on kaolin increased with the increase of pH value. Desorption amount of HPG on kaolin did not increase with the increase of temperature. MgCl2 and CaCl2 decreased the adsorption capacity. NaCl,KCl,Na2 SO4 and Na3 PO4 could increase the adsorption capacity,in which KCl had the greatest impact. The addition of monobasic alcohol did not change the amount of adsorption,while polybasic alcohol could increase the amount of adsorption. The addition of the polymer decreased the amount of adsorption.
Guar gum fracturing fluid is most widely used fracturing fluid in oilfield,but it needs gel breaking and flowback after fracturing,which causes damage to the formation. The adsorption of gel-breaking solution is an important aspect of formation damage. In this work,hydroxypropyl guar gum( HPG) was selected for determining the concentration of guar gum solution. The adsorption behavior of HPG on the kaolin was studied.The determination method of HPG concentration was established by the similar structure of guar gum and cellulose. The result showed that the adsorption amount of HPG on kaolin was 7.1 mg/g,and the adsorption behavior followed the Langmuir adsorption isotherm. FTIR results showed that the HPG adsorption on kaolin was physical adsorption. XRD characterization confirmed the adsorption of HPG into kaolin inside. In summary,the adsorption of HPG onto kaolin was physical adsorption,inside adsorption and monolayer adsorption. Finally,different influencing factors( temperature,p H,salts,alcohols,polymers) were studied.The results showed that the adsorption of HPG on kaolin increased with the increase of pH value. Desorption amount of HPG on kaolin did not increase with the increase of temperature. MgCl2 and CaCl2 decreased the adsorption capacity. NaCl,KCl,Na2 SO4 and Na3 PO4 could increase the adsorption capacity,in which KCl had the greatest impact. The addition of monobasic alcohol did not change the amount of adsorption,while polybasic alcohol could increase the amount of adsorption. The addition of the polymer decreased the amount of adsorption.
引文
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14 Grzadka E,Wisniewska M.J.Surfactants Deterg.,2015,18(3):445-453
15 Dange C,Phan T,Andre V,Rieger J,Persello J.J.Colloid Interface Sci.,2007,315(1):107-115
16 Ma X,Pawlik M.J.Colloid Interface Sci.,2005,289(1):48-55
17 Lin K,Wu C,Jochems A P.J.Mol.Liq.,2017,232:269-276
18 Saien J,Kharazi M.J.Mol.Liq.,2016,220:136-141
19 Mhlanga S,O'Connor C,McFadzean B.Miner.Eng.,2012,36-38:172-178
2 Thomas H,Johann P.Energy Fuels,2015,26(6):3601-3608
3 XU Lin-Jing,ZHANG Shi-Cheng,MA Xi-Fang.Xinjiang Petroleum Geology,2016,37(4):456-459徐林静,张士诚,马新仿.新疆石油地质,2016,37(4):456-459
4 GUO Jian-Chun,HE Chun-Ming.Acta Petrolei Sinica,2012,33(6):1018-1022郭建春,何春明.石油学报,2012,33(6):1018-1022
5 Ma X,Pawlik M.J.Colloid Interface Sci.,2007,313(2):440-448
6 Li K,Jing X,He S.Energy Fuels,2016,30(11):9089-9096
7 Kroon-Batenburg L.,Kroon J.Glycoconjugate J.,1997,14(5):677-690
8 Lv Y,Wang X,Yu X,Zheng S,Wang S,Zhang Y,Du H.Phys.Chem.Chem.Phys.,2017,19(10):7054-7061
9 Lunkenheimer K,Geggel K,Prescher D.Langmuir,2017,33(39):10216-10224
10 Zhang L,Zhang B,Wu T,Sun D,Li Y.Colloids Surf.A,2015,484:118-129
11 LI Bai-Chuan,WANG Wei-Jie,XU Shu-Han,CHEN Xiao-Mei,CHEN Xi.Chinese J.Anal.Chem.,2018,46(8):1208-1214李百川,王伟杰,许书翰,陈晓梅,陈曦.分析化学,2018,46(8):1208-1214
12 LI Dong-Xiang,HOU Wang-Guo,HAN Su-Hua.Journal of Shandong University(Natural Science),2003,38(1):86-88李东祥,侯万国,韩书华.山东大学学报(理学版),2003,38(1):86-88
13 Kondo S,Ishikawa T,Abe I.Adsorption Science,Translated by LI Guo-Xi,Beijing:Chemical Industry Press,2005:168-172近藤静一,石川达雄,安部郁夫.吸附科学(第二版).李国希译.北京:化学工业出版社,2005:168-172
14 Grzadka E,Wisniewska M.J.Surfactants Deterg.,2015,18(3):445-453
15 Dange C,Phan T,Andre V,Rieger J,Persello J.J.Colloid Interface Sci.,2007,315(1):107-115
16 Ma X,Pawlik M.J.Colloid Interface Sci.,2005,289(1):48-55
17 Lin K,Wu C,Jochems A P.J.Mol.Liq.,2017,232:269-276
18 Saien J,Kharazi M.J.Mol.Liq.,2016,220:136-141
19 Mhlanga S,O'Connor C,McFadzean B.Miner.Eng.,2012,36-38:172-178