... that the fluidity of guar gum residue rises. Bacillus aerius has the fastest degradation ability from 86.5 mPa·s to about 3.0 mPa·s for 48 h with the decrease of average molecular weight from 5.19×10 5 to about 4.53×10 4 . Furtheremore, the thickness of filter cake was reduced by average 0.46 mm showing...

... Abstract Hydroxypropyl guar (HPG) fluid, which is widely used in San Jorge Basin due to it is inexpensive and able to carry high concentration proppants, has more residue to damage matrix. As the permeability of tuffstone is very low, fracturing fluid that are low-damaging to the proppant pack...

... immovable contaminants were discharged from the dummy core holder. After disassembled to check on the inside, a little amount of residue was observed around the outlet cap. Moreover, the residue was not sticky and easily removed. According to visual inspection of dissolved contaminants in effluent...

... for fracturing applications grows, there is further damage expected from scale/precipitate deposition into the proppant pack. Past studies in the literature focus on impairment of proppant pack permeability from broken polymer gel residue, but precipitation of scale from source water is not considered...

... by the fracturing fluids. The damaging mechanisms are believed to include fluid invasion, proppant embedment, gel filter cake at the fracture face, and the gel residue in the proppant pack. The relative significance of the formation damage due to each of the mechanisms is not clear. This paper presents result...

... Abstract Removal of oil-based drilling fluid (OBM) residue from the wellbore is critical to help prevent costly contamination of clear completion brines. Completion brine contaminated with OBM can adversely affect reservoir producibility. OBM residue may be present as a thin film that coats...

... enzyme drilling fluid chemistry flowrate filtration drilling fluids and materials procedure cleanup brine residue concentration diameter drilling fluid selection and formulation upstream oil & gas control screen drill-in fluid geology geologist fluid dynamics formation damage sand...

... laboratory measured values. This damage was attributed to residual polymer damage. The well was monitored for one year. During this time, the gravel permeability increased. A multirate test and pressure buildup test were performed one year after treatment, and analysis showed that all damage to the gravel...

... was that breaking the treating fluid to a non-viscous state was sufficient to provide for the proppant-pack clean-up upon flowback. Recent studies have illustrated that the permeability is significantly impaired by the polymer residue even though sufficient breaker concentrations have been added to effectively...

... the efficiency of MHF operations, With this thermally stable fluid, treatments may be designed using 20% less polymer than conventional fluids. The lower polymer loading helps lower costs and reduces the possibility of damage due to polymer residue. drilling fluid selection and formulation drilling fluids...

... derivatized cellulose (0% w/w residue), derivatized guar gum (1-2% w/w residue), intermediate residue guar gum (5-6% w/w residue) and guar gum (8-10% w/w residue). The relative residue volumes for these polymers were determined and compared to their actual flow impairment values. The effect of polymer loading...

... Abstract The relative reduction in both formation permeability and fracture flow capacity caused by the residue remaining after water based fracturing fluids are broken is often very important in the final selection of a fracturing fluid. Therefore, it is important to understand some...

... Possible damage due to the stimulation fluid can exist from residue, fluid retention, or formation-fluid incompatibility. During recent years, a major emphasis has been placed on the development of fluid systems to minimize these possible sources of damage. By utilizing low-residue gelling agents...