Water Control Method for Stimulation by Inducing Salt Precipitation in Gas Reservoir

Abstract

Abstract: In this paper, a method for plugging high permeability zones by salt precipitation is presented for the purpose of enhancing gas recovery. The effects of NaCl concentration, ethyl alcohol augmentation, induction agent and additive on the salt precipitation property are tested under normal temperature. The physical modeling experiment shows that when the water production rates are 47.0% and 84.0%, respectively, the injection of salt precipitation system into sand packing tube allows the water control rate to reach 6.0% and 4.0%, gas production rate to be 6.0% and 4.0% , correspondingly. It is proved that the salt precipitation system can effectively plug the water producing zones, hence keeping the gas production stable in a certain condition.

Key words: gas pool, profile modification, salt, crystallization

CLC Number:

TE375
TE377

WU Kai, PU Wan-feng, ZHANG Chao-ping, JIN Fa-yang. Water Control Method for Stimulation by Inducing Salt Precipitation in Gas Reservoir[J]. Xinjiang Petroleum Geology, 2010, 31(6): 657-658.

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Water Control Method for Stimulation by Inducing Salt Precipitation in Gas Reservoir

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