Preparation an Optimal Hydrogel of Water Shutoff for Iranian Oil Field

Presenting a suitable hydrogel for water shutoff in Iranian oil field is based on gelation time and gel strength. Rheological behavior of was the main purpose this research. To determine time, thermal stability strength plan bottle tests were conducted by using central composite design method with two factors. The hydrogels composed AN125VLM chromium triacetate as copolymer crosslinker, respectively recorded 8 weeks. Furthermore, consistency modulus gels measured amplitude sweep Paar-Physica universal spectrometer, model MCR501. A 26,339 ppm concentration 0.12 ratio crosslinker/copolymer also 2 days selected optimal one. Also, it showed maximum value 31,900 Pa among other samples, tremendously, which highest resistance against external stress. ensure different effective parameters porous media, rheological experiments carried out. 12 Run Plackett-Burman used screening eight NaCl, CaCl2, KCl MgCl2 concentrations, temperature, pH, sodium lactate nanoclay while keeping component constant. Finally, found that temperature most parameter to control pH had negligible effect gel.