Preparation and Performance Evaluation of W/O Emulsion Plugging Agent Based on Cottonseed Bottom Oil

doi:10.11885/j.issn.1674-5086.2019.01.10.01

Abstract

Abstract: Cottonseed oil is a by-product of cottonseed oil press. Waste cottonseed oil will cause serious environmental pollution and waste of resources. In this paper, emulsified cottonseed oil is first used as a selective plugging agent. The W/O emulsion of cottonseed bottom oil with high water content was prepared by using suitable compound emulsifier and its performance was evaluated. The viscosifying interval of emulsion was studied by rheometer. The results show that the maximum viscosifying interval can reach 80%. The stability of the emulsion was studied by oil fraction. The stability of the emulsion increased with the increase of water content. The temperature and salt resistance of the cottonseed oil emulsification system was evaluated. The cottonseed oil emulsion could withstand high temperature at 110℃ and 2×10⁴ mg/L. Calcium ion; Newtonian properties of emulsions with different water content were studied by flow behavior index. The results showed that the higher water content, the weaker pseudoplasticity; sand-filled tube displacement experiment showed that the water and oil plugging rates of cottonseed oil emulsions were 98% and 15%, respectively, with good plugging performance and oil-water selectivity.

Key words: cottonseed wasted-oil, W/O emulsion, selectivity, oil well plugging water, rheology

CLC Number:

DONG Ruiqiang, ZHI Keke, GUO Lianghui, HE Long, LI Entian. Preparation and Performance Evaluation of W/O Emulsion Plugging Agent Based on Cottonseed Bottom Oil[J]. 西南石油大学学报(自然科学版), 2020, 42(2): 182-188.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2019.01.10.01

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