Dolomitization of Ekofisk Oil Field reservoir chalk by injected seawater

被引：0

作者：

Petrovich, R ^{[1
]}

Hamouda, AA ^{[1
]}

机构：

[1] Phillips Petr Co, Res & Serv Div, Geosci Branch, Bartlesville, OK 74004 USA

来源：

WATER-ROCK INTERACTION | 1998年

关键词：

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Seawater that is being injected into the fractured chalk reservoir of the Ekofisk Oil Field is reacting with it at 131 degrees C and 28-34 MPa and being produced again, after some months, from a few wells. Changes in its composition, modeled with SOLMINEQ.88, show that very slow dolomitization is occurring in the reservoir and the precipitated dolomite is very disordered. Also, brine chemistry shows that the very sparse indigenous dolomite in the Ekofisk reservoir chalk is partially ordered. Our observations provide direct evidence of dolomitization of CaCO3 rocks by seawater, such as is inferred to occur within the endo-upwellings of atolls.

引用

页码：345 / 348

页数：4

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