因子图解法预测雅克拉构造含油气性及图形数据再处理

雅克拉构造位于中国新疆塔里木盆地东北部，沙雅隆起的中段，为一高断块，地处南北侧两个生油拗陷油气运移指向的聚集地带。布于构造上的沙参２井于奥陶系获高产工业油气流。在油气化探工作中，土壤气体测量法属多指标找矿法。在数学地质领域内，因子分析（Ｒ型或Ｑ型）是一种多元统计方法，是用以进行系统分类和成因分类的重要手段。本文通过对雅克拉工区１９５个土壤样品、１３个气测指标（烃类气体１２个，稀有气体１个）进行Ｒ型因子分析，根据因子图解特征，划分因子得分异常区带。以预测该区含油气性。随着地质资料的日益丰富，为进一步对比研究地表异常划分和异常分布特征，作者于１９９３年再次对图形数据进行处理，采用电子计算机成图，对工区异常区带的划分作了修改。

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,