2 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Smectite"

open access

Shale mineralogy and burial diagenesis of Frio and Vicksburg Formations in two geopressured wells, McAllen Ranch area, Hidalgo County, Texas

Thirty-six shale samples ranging in depth from 1454 ft to 13,430 ft from Shell Oil Company No. 1 Dixie Mortgage Loan well and 33 shale samples ranging in depth from 2183 ft to 13,632 ft from Shell Oil/Delhi-Taylor Oil Corporation No. 3 A.A. McAllen well were examined by x-ray techniques to determine the mineralogical parameters of the geopressured zone in the Vicksburg Fairway. Both wells have the same weight-percent trends with depth for the mineralogy: quartz, calcite, total clay, and potassi… more

Date: January 1, 1981

Creator: Freed, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Reactions of Attapulgite and Sepiolite in High-Temperature Drilling Fluids

The fibrous clay minerals attapulgite and sepiolite have been subjected to hydrothermal reactions between 149 C (300 F) and 427 C (800 F). A 4% suspension of each of these clays was autoclaved for 16 to 24 hours with and without the addition of salts of NaCl and KC1 at 1% concentration. These fibrous clay minerals start to convert at 204 C (400 F) to a smectite with a lamellar morphology. In fact, attapulgite converts more readily than sepiolite, and the attapulgite-to-smectite transformation i… more

Date: January 1, 1981

Creator: Guven, N.; Carney, L. L. & Lee, L-J