Abstract: Due to the features of super deep, super thick, high temperature, high pressure, high viscosity, high salinity and high content of hydrogen sulfide in the districts ten and twelve of the Ordovician reservoirs in the Tahe Oilfield, it has brought great challenges to dynamic monitoring. In order to solve the problems of pressure monitoring of super deep and thick wells in the Tahe Oilfield, pressure testing technology with capillary is utilized, which transfers all the test components to the ground. Compared to regular pressure testing methods, this technology improves the ability to resist temperature, pressure and adapt inclination greatly, which meets the real-time display and storage of pressure data, and satisfies various kinds of production testing requirement. This technology has been applied successfully in the well TH10315X in the Tahe Oilfield, and has achieved good results.