Kaolinite-to-dickite reaction in sandstone reservoirs

$14.96 plus tax (Refund Policy)

Buy Article:

Abstract:

The SEM, XRD, FTIR and DTA analyses of different size-fractions of clay material from sandstone reservoirs which have experienced a large range of burial conditions have been used to examine the different steps of the depth-related kaolinite-dickite reaction. Dickite progressively replaced kaolinite within a range of burial depths estimated between about 2500 m and 5000 m. The kaolinite-to-dickite reaction proceeds by gradual structural changes concomitant to crystal coarsening and change from booklet to blocky morphology. The crystallization of dickite proceeds by two distinct paths: (1) Accretion of new material from either dissolution of smaller unstable kaolinite crystals and/or detrital minerals (chiefly feldspars), on early-formed coarser metastable kaolinite crystals which exert extended morphological control on the growing crystals. (2) Neoformation of ordered dickite which will continue to grow by a dissolution-crystallization process. The kaolinite-todickite reaction is kinetically controlled and anomalies in the kaolinite/dickite ratio observed in certain sandstone reservoirs may be used to assess the timing of invasion by hydrocarbons.

Document Type: Research Article

DOI: http://dx.doi.org/10.1180/000985598545499

Affiliations: 1: CNRSUMR 6532, Université de Poitiers 40Av. du Recteur Pineau 86022 Poitiers Cedex 2: LGITIRIGM, Universite J. Fourier, CNRS- BP53, 38041 Grenoble Cedex 9 3: Laboratoire de Géochimie, UMR 5563 CNRS Université 4: Laboratoire de Géochimie, UMR 5563 CNRS Université

Publication date: June 1, 1998

More about this publication?
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
UA-1313315-23
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more