Restoring permeability to clay-containing water damaged formations. [Preprint]
Conference
·
· Soc. Pet. Eng. AIME, Pap.; (United States)
OSTI ID:5291289
This study shows that Ca/sup + +/ ions used to treat hydrated clays in the expanded state do exchange with the other positive ions, but do not cause the clay to shrink while it is wet. The clay must be dried and shrunk as a result of the drying step. Such a clay will not re-expand to its original expanded size when it is rehydrated. With respect to field applications, this fact indicates that a reservoir damaged by fresh water will show little or no benefit from a treatment with calcium ions as long as the clay remains wet. If the clay can be dried by some means, then it is anticipated that upon exposure to fresh water, the dry calcium-treated clay will not swell to its original size. A possible procedure for field treatment is outlined.
- Research Organization:
- Pennsylvania State Univ
- OSTI ID:
- 5291289
- Report Number(s):
- CONF-690997-
- Conference Information:
- Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-2682
- Country of Publication:
- United States
- Language:
- English
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