Журнал биоразнообразия и исчезающих видов

Study of Reduced Formation Damage due to Oil Well Drilling Mud by Barite and Gas Oil Additives

Abstract

Kapil Gaur

This analysis presents study of the impact of drilling muds on the oil reservoir rocks specifications, and also the interactions between the clay minerals existing within the formation with the drilling muds. For minimization and interference of formation harm ensuing from drilling muds, and formation minerals, drilling muds were ready in such some way that they give the muds that are used according to the daily mud report of the South Company. These muds are H2O mud, Ferrochrome Lignosulfonate (FcLs). About a hundred core plugs were ready from seven wells and for 3 fields of the Zubair formation from depths of over (3000) meters. The core plugs were cut in size to regarding one in. (2.54 centimeters) diameter and 3 centimeters length. They were cleansed, dried, and so subjected to petrophysical tests that were (porosity, porousness, saturation, and pore size distribution by the capillary pressure), X-ray diffraction, and also the petrographical analyses. The results of the experimental work showed that the clay minerals in formation increase the formation harm, and reduce the oil permeability. Additionally, the results showed that the treatments of drilling muds might cut back formation impairment. This was accomplished through create bridging system with completely different barytes additions seventy, 140, 200, 280 lb/bbl to H2O mud. This bridging system creates an efficient waterproofing of impervious filter cake, thereby inhibiting continual losses of little solids and dust filtrate into the formation. Finally, relationships for various oil permeability's are obtained for predicting harm in oil permeability's as a result of completely different drilling muds.