收稿日期: 2007-07-27
修回日期: 2007-09-29
网络出版日期: 2008-06-20
基金资助
国家自然科学基金项目(编号:40602016)；中国石油科技风险创新研究项目联合资助.
FORMATION OF H2S DURING THERMAL RECOVERY FOR VISCOUS OIL BY STEAM
Received date: 2007-07-27
Revised date: 2007-09-29
Online published: 2008-06-20
张静岩;朱光有;田建波;文志刚 张水昌 . 注蒸汽开采稠油过程中H2S的形成[J]. 天然气地球科学, 2007 , 18(6) : 798 -802 . DOI: 10.11764/j.issn.1672-1926.2007.06.798
Steam soak and steam flood are popular thermal recovery techniques for viscous oil. But when they are used for production, some H2S will form for heating oil sand by steam. The formation of H2S is complex when geologic conditions and recovery methods are varied. The H2S formed during thermal recovery are secondary. Through research we think that the reasons for the formation of secondary H2S are thermal decomposition of sulfides (TDS) and thermo\|chemical sulphate reduction (TSR). Examples of thermal recovery for viscous oil abroad have proved that the quantity of H2S formed is in direct proportion to sulfur content of crude oil. Moreover, if there are sulfate ions in the layer, the high temperature will favor the TSR. In fact, the formation of H2S has something to do with both reasons above, and the reasons are connected to each other. Since H2S is harmful, something must be done to prevent H2S from forming.
Key words： Viscous oil; Steam flood; Steam soak
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