Modular β‐cyclodextrin and polyoxyethylene ether modified water‐soluble polyacrylamide for shale hydration inhibition |
| |
| Authors: | Wenchao Jiang Zhongbin Ye Shaohua Gou Xiangjun Liu Lixi Liang Wan Wang Zewen Song |
| |
| Institution: | 1. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan, China;2. State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan, China;3. Drilling Fluid Branch, Greatwall Drilling Company of CNPC, Beijing, China |
| |
| Abstract: | A novel water‐soluble copolymer was prepared from acrylamide (AM), acrylic acid (AA), mono‐2‐O‐(allyloxy‐2‐hydroxyl‐propyl)‐β‐cyclodextrin (O‐β‐CD) and allyl alcohol polyoxyethylene ether (APEG), which was characterized with infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, 13C‐nuclear magnetic resonance spectrometry and static light scattering. This new copolymer combining polyglycols and the massive hydroxyl groups and cavity structure of β‐CD was investigated for inhibiting shale hydration. Based on the salt‐tolerance test, thermogravimetric‐differential scanning calorimetry‐mass spectrometer analyses, copolymer AM/AA/APEG/O‐β‐CD has made progress in the salt and temperature resistances. Moreover, the remarkable inhibiting‐hydration performance of copolymer was found as evidenced by the reduction of interlayer spacing of sodium montmorillonite and the high retention rates of indentation hardness of shale cores. Copyright © 2015 John Wiley & Sons, Ltd. |
| |
| Keywords: | polyacrylamide β ‐cyclodextrin polyoxyethylene ether shale‐hydration inhibition |
|
|
