PREDICATIONS OF OIL AND GAS POTENTIAL BY FACTOR DIAGRAM METHOD AND REPROCESSING DIAGRAM DATA IN YAKELA.STRUCTURAL AREA

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,