Downhole PVT sampling is difficult to be conducted in a certain exploration well of Bohai Sea Oilfield because of
the characteristics of high temperature, containing H2S and condensate oil. To ensure the successful acquisition of downhole fluid samples, the
advantages and disadvantages of RD sampling valve, RD singlephase sampler, P.D.S (Positive Displacement Sampler), S.P.S (Single Phase Sample)
and ground touch sampler were analyzed in this paper. In view of the characteristics of the test well, the S.P.S singlephase sampler produced by
Proserv Company was selected to sample the highpressure physical properties of the well. During the operation, the sampler was installed on the
sampler bracket and run in hole with the drill pipe. During the flowing stage of well opening, the rupture disk was broken through by the annulus
pressure so as to trigger sampling and obtain reservoir fluid sample. Laboratory analysis showed that the flash GOR of the sample was 1413 m
3/m3, the oil density in the tank was 08024 g/cm3, and the H2S content of the single flash gas component was 573 ppm. Based on the
component analysis of flash oil and flash gas, the calculated components of the well flow classification were as follows: C1+N2 was 7162%, C
2～C6+CO2 was 2109%, and C7+ was 729%. Therefore, the sample was considered to be the condensate gas reservoirs. S.P.S can be applied
to acidic and corrosive oil (gas) fields containing H2S and CO2. It can hold the reservoirpressure and has a better anticorrosion ability,
thus it can be widely used in similar oil and gas fields.