Cementing in HPHT well is approach used by many players in the oil and gas industry nowadays. This is due to most of reserve is situated in deeper location compare with regular well drill before. In order to perform cementing process in this location, it is very challenging. This is because the HPHT well is high in reservoir temperature and pressure and narrow density window. Therefore, details study and analyze of well parameters should be taken into consideration in design and execute cementing process. This paper is objectively to measure the flow rate of slurry when cementing in HPHT well with regards the ECD behavior. This is being obtained through the cement design slurry by using Landmark software. The software used encompasses three module like COMPASS module, WELLPLAN module and OPTICEM module which well trajectory design through COMPASS module and cement design by using WELLPLAN module and OPTICEM module. Pertaining on that, the ECD behavior is tabulated. As a result, the optimum flow rate of the slurry is measured and recorded
