A new drilling fluid technology based on supramolecular chemistry

被引：0
|
作者：
Jiang G. [1 ,2 ]
Wang K. [1 ,2 ]
He Y. [1 ,2 ]
Dong T. [1 ,2 ]
Luo X. [1 ,2 ,3 ]
Zhao L. [3 ]
Wu Y. [3 ]
机构：
[1] State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing
[2] College of Petroleum Engineering in China University of Petroleum (Beijing), Beijing
[3] Drilling Fluid Branch of CNPC Xibu Drilling Engineering Company Limited, Karamay
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2020年 / 44卷 / 04期
关键词：
Oilfield application; Polymer drilling fluids; Rheological properties; Salt-responsive polymer; Supramolecular chemistry;
D O I：
10.3969/j.issn.1673-5005.2020.04.013
中图分类号：
学科分类号：
摘要：
The theory of supramolecular chemistry was introduced to make electrolyte ions (Na+ and Cl-) in the saline environment to promote the extension of polymer molecular chains through the electrostatic attraction between electrolyte ions and the anionic and cationic groups of polyelectrolytes. In this way, brine becomes a good solvent for polymers, which changes the research approach from salt resistant polymer to salt-responsive polymer. Then the supramolecular rheological modifier and supramolecular filtrate reducer were developed, and a supramolecular drilling fluid system was formed mainly based on these two additives. The results show that the supramolecular drilling fluid maintains excellent recovery performance after high shear. Compared with common polymer drilling fluids, the supramolecular drilling fluid exhibits lower viscosity at extremely high shear rate, and its rheological properties are closer to the ideal range. Additionally, the permeability recovery value of supramolecular drilling fluid reaches above 90%, showing good high temperature resistance and tolerance to bentonite. The field application tests of supramolecular drilling fluid were conducted in 5 wells of Xinjiang oilfield. In these 5 wells, the reduction rate of downhole complex conditions is 97.66%, and the average rate of penetration is increased by 1.08-1.75 m/h.The decrease rate of well diameter expansion in the reservoir interval is between 18.29%-32.20%, compared with other wells in this region. Consequently, the supramolecular drilling fluid system plays an important role in solving the resistance to salt invasion of drilling fluids, improving the rheology of drilling fluids, and increasing the efficiency of jet drilling, which could become a new direction for the development of drilling fluids. © 2020, Editorial Office of Journal of China University of Petroleum(Edition of Natural Science). All right reserved.
引用
收藏
页码：111 / 120
页数：9
相关论文
共 28 条
  • [1] MA Xinhua, XIE Jun, The progress and prospects of shale gas exploration and development in southern Sichuan Basin, SW China [J], Petroleum Exploration and Development, 45, 1, pp. 172-182, (2018)
  • [2] LI Yong, TANG Dazhen, WU Peng, Et al., Continuous unconventional natural gas accumulations of Carboniferous-Permian coal-bearing strata in the Linxing area, northeastern Ordos Basin, China [J], Journal of Natural Gas Science and Engineering, 36, pp. 314-327, (2016)
  • [3] ZOU Caineng, Dazhong DONG, WANG Yuman, Et al., Shale gas in China: characteristics, challenges and prospects (II) [J], Petroleum Exploration and Development, 43, 2, pp. 182-196, (2016)
  • [4] SUN Jinsheng, HUANG Xianbin, LU Kaihe, Et al., Methods, technical progress and research advance of improving hightemperature stability of water based drilling fluids, Journal of China University of Petroleum (Edition of Natural Science), 43, 5, pp. 73-81, (2019)
  • [5] LEHN J M., Supramolecular chemistry:scope and perspectives molecules, supermolecules, and molecular devices [J], Angewandte Chemie International Edition, 27, 1, pp. 89-112, (1988)
  • [6] LEHN J M, SANDERS J K., Supramolecular chemistry: concepts and perspectives [J], Angewandte Chemie International Edition, 34, 22, (1995)
  • [7] SHEN Jiacong, SUN Junqi, The progress of supramolecular chemistry [J], Bulletin of Chinese Academy of Sciences, 19, 6, pp. 420-424, (2004)
  • [8] ZHOU Gongdu, Supramolecular structure chemistry, University Chemistry, 17, 5, pp. 1-12, (2002)
  • [9] YAN Xuzhou, WANG Feng, ZHENG Bo, Et al., Stimuli-responsive supramolecular polymeric materials [J], Chemical Society Reviews, 41, 18, pp. 6042-6065, (2012)
  • [10] APPEL E A, BARRIO J D, LOH X J, Et al., Supramolecular polymeric hydrogels[J], Chemical Society Reviews, 41, 18, pp. 6195-6214, (2012)
123