Drilling fluid represents the most important that must fulfill numerous assignments during drilling operations. Many commercially available additives for water-based fall into category of non-degradable and environmentally hazardous materials. Significant development in this area can be made by using biodegradable materials as fluids. The objective study was to determine whether mandarin peel p...

Wellbore instability is one of the major problems that hamper the drilling speed in Halfaya Oilfield. Comprehensive analysis of geological and engineering data indicates that Halfaya Oilfield features fractured shale in the Nahr Umr Formation. Complex accidents such as wellbore collapse and sticking emerged frequently in this formation. Tests and theoretical analysis revealed that wellbore inst...