Synthesis of a Bio-Polymer Nanocomposite Fracturing Fluid for HTHP Application

摘要

The global energy demand has been amplified significantly in the last two decades and the Oil & Gas industry turns to harsh operating conditions of high pressure high temperature (HPHT) and brine. The present study proposes biopolymer nanocomposite as a solution to these challenges in fracturing application as the resultant fracturing fluid possess synergetic and hybrid properties of polymer and nanoparticles which offers unique mechanical and thermal properties. Nano composites formed with biodegradable polymers have high rewards and opportunities in the future for the applications in the design of environmental friendly materials. The developed nanocomposite fluid can solve the breaking residue problem associated with guar and can give viscosities similar to guar with benefits of bio-degradability. The nanocomposite fluid provided viscosities above 100cP at 100s ~(?1) shear rate upto 150°C at 1.75% polymer concentration with 0.5% SiO2 nanoparticle. The oscillatory study reveals true gels characteristics with G/G ratio >3. The elastic behavior was dominated by viscous behavior which supports proppant suspension capability. The nanocomposite fluid was easily breakable using oxidative breaker-Ammonium per Sulfate and residue generated was less as compared to guar gum due to lower molecular weight without compromising on viscosity. The static proppant suspension test showed satisfactory performance making it suitable for HTHP conditions.