Soil adsoption wire method consists of two sampling styles, field wire insertion sampling (from intact fresh soil) and indoor wire insertion sampling (from preliminarily processed soil). An experimental research of this two sampling styles has been conducted in Linnan area, Bohai Bay Basin to investigate the effects of different sampling styles. The results show that different sample styles have different influences on the adsorption hydrocarbon indicators, although the anomaly distribution characteristics of a number of effective indicators such as C_2-8, C_9-19, and total hydrocarbons have not been influenced by the sampling styles. A field study of wire insertion sampling in Junggar Basin indicates that the indicators C_4-5 can well reflect the subsurface oil and gas reservoir of Well Chaican 1. And an indoor wire\|insertion sampling study in Well Yingnan 2, Tarim Basin shows that the surface anomaly distribution characteristics of the geochemical indicators C_2-8 and C_15-19 can also well indicate the existing oil and gas reservoir in the subsurface. The wire adsorbed hydrocarbon indicators of the above three basins obtained by two sampling styles all respond truly to the underlying existing oil and gas reservoirs, indicating that the sampling style is a kind of external influencing factor of the effective wire adsorbed hydrocarbon indicators, while the geochemical characteristics of the indicators is the internal influencing factor.  And the vertical hydrocarbon microseepage from the reservoir is the direct influence factor of the effective wire adsorbed hydrocarbon indicators, which is the real cause for the effective wire adsorbed hydrocarbon indicators to respond to the underground oil and gas reservoir.