化探在油气勘查中的作用与意义

EFFECT AND SIGNIFICANCE OF GEOCHEMICAL EXPLORATION IN OIL AND GAS PROSPECTING

建立在烃类垂向微运移理论基础上的化探技术是用先进仪器设备检测痕量的油气组分,不同级次的异常均具有重现性好、稳定性高的特点。区域异常可预测盆地的含油气远景,区带异常指出了油气富集的有利区带;局部异常为评价圈闭或圈闭钻探先后排序提供了依据;矿置异常显示了油气田扩边外缘的方向。井中化探能随钻预测油气层,提供试油层位。文中以实践探例论述了化探的上述功能,指出了当今油气化探存在的混淆勘查阶段、急功近利、忽视应用基础研究以及队伍技术力量不足等制约油气化探技术发展的问题。

Based on the vertical micromigration theory of hydrocarbons, the geochemical exploration technology detects trace hydrocarbon components by advanced instruments and devices. Different grades of anomalies all have the character of good reproducibility and high stability.Regional anomalies forecast the petroleum prospects of a basin, zone anomalies point out the favorable zones of hydrocarbon enrichment, local anomalies provide basis for trap evaluation or the arrangement of trap drilling, and mineral distribution anomalies indicate the extension outsideborder direction of oil and gas fields. Downhole geochemical exploration can predict hydrocarbon reservoirs while drilling and give oiltesting horizons.All above functions of geochemical exploration were discussed by practical exploration examples. It was considered that confusing prospecting stages,being eager for quick success and instant benefit,ignoring applied basic research and insufficient personnel technical forces which existed in hydrocarbon geochemical exploration at present were questions restricting the development of hydrocarbon geochemical exploration technologies.