Universiti Teknologi Malaysia Institutional Repository

Low-sulfate seawater injection into oil reservoir to avoid scaling problem

Merdhah, Amer Badr and Mohd Yassin, Abu Azam (2008) Low-sulfate seawater injection into oil reservoir to avoid scaling problem. Journal of Applied Sciences, 8 (7). pp. 1169-1178. ISSN 1812-5654

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Abstract

This study presents the results of laboratory experiments carried out to investigate the formation of calcium, strontium and barium sulfates from mixing Angsi seawater or low sulfate seawater with the following sulfate contents (75, 50, 25, 5 and 1%) and formation water contain high concentration of calcium, strontium and barium ions at various temperatures (40-90°C) and atmospheric pressure. The knowledge of solubility of common oil field scale formation and how their solubilities are affected by changes in salinity and temperatures is also studied. Results show a large of precipitation occurred in all jars containing seawater while the amount of precipitation decreased when the low sulfate seawater was used. At higher temperatures the mass of precipitation of CaSO4 and SrSO4 scales increases and the mass of precipitation of BaSO4 scale decreases since the solubilities of CaSO4 and SrSO4 scales decreases and the solubility of BaSO4 increases with increasing temperature. It can be concluded that even at sulfate content of 1% there may still be a scaling problem.

Item Type:Article
Uncontrolled Keywords:Scaling problems, low sulfate seawater, high salinity, high barium, temperature
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:6629
Deposited By: Norhani Jusoh
Deposited On:17 Oct 2008 09:18
Last Modified:01 Jun 2010 15:45

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