Open Access

ARTICLE

Effect of Gas-wetting on Dispersing Properties of Clay Minerals in Condensate Gas Reservoir

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1 State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, China.
2 MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, China.

Structural Longevity 2013, 10(1), 11-17. https://doi.org/10.3970/sl.2013.010.011

Abstract

The condensate gas reservoir output could be enhanced significantly with the gas-wetting reversal FC-1. However, changes in the wettability have been shown to affect dispersion properties of clay minerals in condensate gas reservoir. With the gas-wetting realized on the montmorillonite (MMT), zeta potential and cation exchange capacity (CEC) change with wettability reversion were studied in this paper, and the mechanism of it was also analyzed. The zeta potential of 100 ∼ 200 mesh MMT reached to -17.27mV and gradually approached to nondispersion condition; with FC-1 concentration increased, CEC decreased sharply from 2.14 to 0.2. The microstructure of MMT was analyzed by SEM and TEM, and conclusions were drawn that fluorocarbon chain FC-1 had been attached on the surface of MMT particles and formed a gas-wetting reversal film which maintains their stability.

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Keywords

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