Completion and workover fluids

Application of High-Density Brines in Drilling and Completion Fluids: Current Insights and Future Perspectives

“…The fluid must also have low viscosity to allow for easy circulation and must be nondamaging to the formation to prevent the loss of productivity in the well. The composition of completion brines varies depending on the specific requirements of the drilling operation. , The salts used in the composition of completion brines are typically chosen for their ability to increase the density of the fluid without significantly increasing the viscosity. The salts utilized for the formation of completion brines are as follows: NH 4 Cl, KCl, NaCl, sodium formate (NaCOOH), CaCl 2 , NaBr, potassium formate (KCOOH), CaBr 2 , ZnBr 2 , and cesium formate (CsCOOH) .…”

“…Due to the higher fluid density, the efficiency of the well simulation process increases prominently. 9,10 The high-density brines modify the viscosity of the oil, which affects its mobility in the reservoir. This feature of HDBs improved the enhanced oil recovery (EOR).…”

“…The HDBs are also especially important in the completion operations for well-stimulation and acidizing. Due to the higher fluid density, the efficiency of the well simulation process increases prominently. , The high-density brines modify the viscosity of the oil, which affects its mobility in the reservoir. This feature of HDBs improved the enhanced oil recovery (EOR). − The formation evaluation is done by employing HDBs in the wireline logging and well testing which could be utilized to create a contrast between the formation and the drilling fluid, which helps to easily interpret the data …”