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Investigation of Oleate-Diethylamine-Epichlorohydrin Copolymer as a Clay Swelling Inhibitor for Shale Oil/Gas Exploration

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Abstract

Oleate graft copolyammonium (OGCA) was prepared and its performance as a shale inhibitor was evaluated by bentonite linear expansion test, anti-swelling experiments, mud ball experiments in water-based drilling fluid. Anti-swelling results shows that anti-swelling rate of OGCA reaches up to 89.7% and OGCA has strong inhibitive capability to bentonite hydration swelling confirmed by the result of mud ball experiment. From the results it was found that both OGCA and modified starch have an excellent synergetic defiltration effect on the water-based drilling fluid. The good performance of OGCA as a shale inhibitor should be contributed to its good capacity of controlling the particle size of bentonite. The inhibition mechanism of the polyamine salt was analyzed by thermogravimetric analysis and scanning electron microscope.

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Authors and Affiliations

  1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, China

    Yan-Long Wang & Qi-Bin Yan

  2. College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an, 710065, China

    Yan-Long Wang, Zhen Guo, Qiang Deng, Jie Zhang & Gang Chen

  3. Research Institute of Oil and Gas Technology, Changqing Oilfield Company, Xi’an, 710025, China

    Gang Guo

  4. State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing, 102206, China

    Gang Chen

Authors
  1. Yan-Long Wang
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  2. Qi-Bin Yan
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  3. Zhen Guo
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  4. Gang Guo
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  5. Qiang Deng
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  6. Jie Zhang
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  7. Gang Chen
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Correspondence to Qi-Bin Yan or Gang Chen.

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Wang, YL., Yan, QB., Guo, Z. et al. Investigation of Oleate-Diethylamine-Epichlorohydrin Copolymer as a Clay Swelling Inhibitor for Shale Oil/Gas Exploration. Pet. Chem. 58, 245–249 (2018). https://doi.org/10.1134/S0965544118030167

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  • DOI: https://doi.org/10.1134/S0965544118030167

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