Research and Application of High-temperature and High-density Water-based Drilling Fluid System
In the Luzhou block of Sichuan Province,due to high formation pressure,high formation temperature gradient,and deep gas reservoir burial,the bottom hole temperature and density in the area are high.In order to save costs,water-based drilling fluid is used for drilling straight sections.However,previous water-based drilling fluids cannot meet the requirements of the area.To solve this problem,based on previous experiments and orthogonal experiments,the author has developed a high-temperature and high-density water-based drilling fluid system formula.The system has good ability to carry rock debris and seal pores in the range of 1.6～2.2 g/cm3 has good inhibitory properties,strong lubricity,good sealing properties,and good temperature resistance.The ability to resist rock debris pollution reaches 8%.This system has been successfully applied on the Lu 203H123 platform,with stable drilling fluid performance,wellbore stability,normal sand carrying,and low friction during tripping,demonstrating excellent performance.
high temperaturehigh pressuredrilling fluid systeminhibitionlubricity
NETL
NSTL
万方数据
