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Wettability alteration used for water block prevention in high-temperature gas wells

P.L., Koh and M.K.R., Panga and S.O., Yean and S.C., Keng and P., Enkababian and M., Samuel and P., Cheneviere (2007) Wettability alteration used for water block prevention in high-temperature gas wells. World Oil, 228 (3). pp. 51-58. ISSN 438790

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Abstract

A gas flow analysis was conducted to evaluate the feasibility of a preventive chemical treatment to avoid water block formation with an aim to induce a long term wettability change. The wettability alteration is expected to increase the volume of brine displaced by gas. A mass flow controller was placed upstream of the core to measure the flowrate of the gas, and the core's gas permeability was calculated from the pressure drop across the core and mean gas flowrate in the core and mean gas flow rate in the core using Darcy's law. Three types of experiments- contact angle, imbibition, and core flow tests were conducted to test the wettability alteration produced by the chemical, the stability of the chemicals at high temperatures, and desorption and longevity of the treatment. The results show that the capillary forces are decreased and the clean-up of trapped water at low drawdown pressures is enhanced.

Item Type:Article
Subjects:T Technology > TN Mining engineering. Metallurgy
Departments / MOR / COE:Departments > Geoscience & Petroleum Engineering
ID Code:252
Deposited By: Mr Helmi Iskandar Suito
Deposited On:02 Mar 2010 01:19
Last Modified:19 Jan 2017 08:27

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