Well sand fracturing sand blocking factors

Sand plug is the most direct cause of the failure of fracturing , especially tight clastic gas reservoir maide fracturing sand in the Sichuan region , the higher the chance of blocking sand , sand blocking factors affecting and more complex , including the formation factors, the fracturing fluid factors , engineering factors , design factors , how to effectively prevent sand blocking the generation of design and construction has been a fracturing operation was tricky puzzles . For large tower farm wells constructed TX-7 complex engineering geological characteristics and sand blocking characteristics, according to the results of the test and the main fracturing fracturing and curve data analysis and processing , analysis and evaluation of multiple fractures of the wells produce sand blocking the wellbore and the effects of different levels of near wellbore friction ,maide oil well fracking fluid efficiency and other factors, and for a large stretch of sand tower field structure for the ultra-low permeability reservoirs interbedded thin , high near wellbore friction , fluid loss coefficient and other complex geological and engineering features , proposed preferred perforation intervals , slug down friction , silt temporary blocking , filtering and other recommendations viscous liquid down a number of important technical measures , the conclusions and recommendations of the Sichuan region of dense gas reservoir rocks the fracturing of important guiding significance.