探讨油气化探精查技术在松辽盆地某断陷北部地区的勘探应用

DISCUSSION ON PRECISE GEOCHEMICAL EXPLORATION TECHNIQUEFOR OIL AND GAS APPLIED TO THE NORTH OF A FAULT DEPRESSIONIN THE SONGLIAO BASIN

通过油气化探精查技术在松辽盆地某断陷北部地区的应用,总结出区内地表油气地球化学特征,提出化探精查技术方法和化探指标系列,并运用浓度异常,主成分异常,熵值异常等数据处理与解释技术,提取深部油气藏地表地球化学信息,评价多处化探异常和预测油气聚集的有利圈闭,为后期勘探工作提供钻探部署建议,其成果认识与同期三维地震工作成果认识相一致,为该断陷北部地区油气勘探工作取得阶段性成果作出重要贡献。

Through the application of precise geochemical exploration technique for oil and gas to the north of a fault depression in the Songliao Basin,the authors have summed up the surface geochemical characteristics of oil and gas in the area and given out technical approaches to precise geochemical exploration and geochemical exploration indicator series. Concentration anomaly, major component anomaly,entropy value anomaly and other data processing and interpretation techniques are employed to acquire the surface geochemical information of deep seated oil and gas reservoir, to appraise a number of geochemical exploration anomalies, to forecast the favorable traps for oil and gas accumulation and to give suggestions for late drilling layout scheme. The research results are coincided with synchronous three dimensional seismic work findings, which contribute to the stage accomplishments of oil and gas exploration in the north of the fault depression significantly.