vug

A fault zone containing vuggy silica, massive pyrite, barite and patches of sphalerite crosscut the fragmental volcanic and returned an interval of 3 m of 0.18% Cu and 3.22 g/t Au.

The different porosity types on the basis of petrography includes intragranular, intergranular, moldic, vuggy and fractured porosity.

Williams et al., "Waterflood in vuggy layer of a middle east reservoir," Displacement Physics Understood, 2002.

The dolomitic part of K1 is characterized to be mudstone, mudstone to packstone, beige, moderately hard to hard, crystalline to cryptocrystalline, have occasional pelloids, pebbles and shell fragments, have local mudcracks in mudstone, slightly argillaceous in parts, have thin layers of anhydrite and o have good to fair vuggy and intercrystalline porosity.

Very finely to coarse-crystalline dolostones alternate, containing vuggy intervals which often have sucrosic texture (Fig.

A single historic drillhole (AND24) in this area, by BHP in 1992, intersected brecciated gneiss, psammite and granite with matrix of chlorite and vuggy quartz veins containing minor chalcopyrite, hematite and pyrite.

In contrast, in the Moncayo sector it is preceded by a metric sequence of yellowish marls or marly-limestones with centimetric layers of interbedded massive vuggy dolostones.

Many wells locate at certain isolated constant volume vuggy cave (Bo, 1997).

Infill irregular, from vuggy to well filled, with fill lithology differing from that of the host rock.