Abstract: Geochemical survey was made in Yakela structure area in 1987. 195 soil samples were taken for measurement and 13 gaseous geochemical indicators were made for R-type, factor analysis. According to the characteristics of factor loading, the author divided the 13 indicators into 4 types and Predicated 4 oil and gas potential zones with 12. high geochemical anomalies. Three producing wells (Shaean-2, Sha-4 and Sha-7) are located within the two geochemical anoma-lies. 10 prospective oil land have been predicated by this method. 8 anomalous zones from these favorable areas have higher factor score than that from well Shacan-2 area. Note that there is a single and circular geochemical anomaly with the coverage about 6km² at the well Shacan-2 area. This is not shown from other geochemical map in the same area, In order to comparing the distribution eharacter of the surface geochemical anomalies determined, the author repro-cessed the diagram data in 1993 by computer mapping procedure and solved rationally the prob-lem of the origin for several higher factor scores resulting in the correction of originakl geo-chemical anomalous zones in the studied area,