Petroleum Science >2017,??Issue 2:??412-423 DOI: https://doi.org/10.1007/s12182-017-0152-7
Drag reduction behavior of hydrolyzed polyacrylamide/xanthan gum mixed polymer solutions Open?Access
文章信息
作者：Mehdi Habibpour and Peter E. Clark
作者單位：
School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, US;School of Chemical Engineering, Oklahoma State University, Stillwater, OK 74078, US
投稿時(shí)間：2016-10-06
引用方式：Habibpour, M. & Clark, P.E. Pet. Sci. (2017) 14: 412. https://doi.org/10.1007/s12182-017-0152-7
文章摘要
Partially hydrolyzed polyacrylamide (HPAM) as the main component of slickwater fracturing fluid is a shear-sensitive polymer, which suffers from mechanical degradation at turbulent flow rates. Five different concentrations of HPAM as well as mixtures of polyacrylamide/ xanthan gum were prepared to investigate the possibility of improving shear stability of HPAM. Drag reduction (DR) measurements were performed in a closed flow loop. For HPAM solutions, the extent of DR increased from 30% to 67% with increasing HPAM concentration from 100 to 1000 wppm. All the HPAM solutions suffered from mechanical degradation and loss of DR efficiency over the shearing period. Results indicated that the resistance to shear degradation increased with increasing polymer concentration. DR efficiency of 600 wppm xanthan gum (XG) was 38%, indicating that XG was not as good a drag reducer as HPAM. But with only 6% DR decline, XG solution exhibited a better shear stability compared to HPAM solutions. Mixed HPAM/XG solutions initially exhibited greater DR (40% and 55%) compared to XG, but due to shear degradation, DR% dropped for HPAM/XG solutions. Compared to 200 wppm HPAM solution, addition of XG did not improve the drag reduction efficiency of HPAM/XG mixed solutions though XG slightly improved the resistance against mechanical degradation in HPAM/ XG mixed polymer solutions.
關(guān)鍵詞
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Slickwater, Polyacrylamide, Xanthan gum, Drag reduction, Shear stability