The Reseach About Nano-materials DNF Application In Oil Well Cement

With oil wells exploration and development more intensified,geological condition has changed greatly. It is becoming more obvious that the current oil well cement limited to cementing operation. The cementing quality related directly to the life and recovery of Wells. In order to increase efficiency of oilfield,cementing quality must be developed. Therefore,it is very importent to increase cement stone macroscopical performance and improve cement paste microstructure by nano-materials to improve cementing quality.70% of the cement hardened slurry is the nanoscale hydration calcium silicate gel(C-S-H). There exists a nanometer level of gelation pore,so nano-materials modified oil well cement existing objectively possibility based on particle gradation theory. Through the indoor experiment,the theme analysis the impact of nanometer materials on oil well cement performanceby testing the various performance of nanometer water slurry and nano cement paste. Through pretreating the nanometer material surface,the nanometer material overcomes differences of mixed default and dispersing uneven in slurry,making the added the nanometer material amount raised to 10% in cement. The nanometer materials slurry system has good flowing property and low water loss. Nano-materials cement has high compressive strength,low permeability and good corrosion resistance. Therefore nanometer material of slurry system has good macroproperties. By XRD,XRF,SEM experiments founding that nano-materials cement paste with compact structure,low porosity has good microstructure. Therefore, nano-materials modified on oil well cement and overcomed the disadvantage of traditional cement faults. Nano-materials cement slurry can enhance the cement performance and solve the problems of well cementing.