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Dissolution/precipitation mechanisms for diagenesis in sedimentary basins

Abstract:

The transformation of hydrated clay minerals (smectite) to anhydrous forms (illite) occurs in the diagenesis of shales in sedimentary basins. The released pore water can lead to excess pore pressures and is of concern in oil drilling operations. Most simply, the process can be modeled as a first-order thermally activated reaction, but an alternative interpretation is that diagenesis occurs via dissolution of smectite in free pore water and subsequent precipitation of illite. We show how such ...

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Journal:
Journal of Geophysical Research B: Solid Earth
Volume:
108
Issue:
10
Publication date:
2003-10-10
ISSN:
0148-0227
URN:
uuid:41f86e0a-84ab-4136-9c89-6fec7cf146eb
Source identifiers:
189308
Local pid:
pubs:189308

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