Preparation of fluidized catalytic cracking slurry oil-in-water emulsion as anti-collapse agent for drilling fluids

Abstract

Fluidized catalytic cracking slurry oil-in-water emulsion (FCCSE) was prepared by using interfacial complexes generation method that was simple and versatile. The critical factors influencing the sample preparation process were optimized, for instance, the optimum value of the mixed hydrophile-lipophile balance of compound emulsifier was 11.36, the content of compound emulsifier was 4 wt%, the emulsification temperature was 75 °C, the agitation speed was 200 rpm, and the emulsification time was 30-45 min. The performance as a drilling fluid additive was also investigated with respect to rheological properties, filtration loss and inhibition of FCCSE. Experimental results showed that FCCSE was favorable to inhibiting clay expansion and dispersion and reducing fluid loss. Furthermore, it had good compatibility with other additives and did not affect the rheological properties of drilling fluids. FCCSE exhibited better performance than the available emulsified asphalt. It has a promising application as anti-collapse agent in petroleum and natural gas drilling.

Keywords

Anti-collapse agent / Fluidized catalytic cracking slurry oil-in-water emulsion / Fluidized catalytic cracking slurry / Borehole stability / Emulsified asphalt

Acknowledgements

The Authors gratefully acknowledge the financial support of Geological Survey project of Ministry of Land and Resources (NO. 12120113097400).

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