黄土覆盖区有其特殊的地形及地质特点，一些常规的油气勘探方法在该地区的应用受到很大的限制，而油气化探方法凭借自身的特点和优势，在黄土覆盖区的油气勘探中发挥了重要的作用。但随着勘探程度的深入，已有的一些油气化探方法已不能满足油气勘探的需要，而游离烃方法作为目前国内外普遍开展的一种油气化探方法，由于其良好的油气勘探效果，正得到越来越广泛的应用。但由于黄土区地貌特征的制约，游离烃方法在黄土区还没有得到广泛利用。无锡石油地质研究所从采样工具的改进入手，研制开发了便携式游离烃采样装置，并使用该装置在黄土覆盖区开展了油气勘探的试验研究工作，试验取得了良好的效果，展现了游离烃方法在黄土覆盖区的良好应用前景。

It is difficult to apply some normal exploring technologies in areas covered by loess due to peculiar landform and geologic character. Oil and gas geochemical prospecting methods play an important role in these areas. But with the progress of the exploring extent, several oil and gas geochemical prospecting methods at present are not suitable for oil and gas exploration any more. Free hydrocarbons technology, one of the prevalent oil and gas geochemical prospecting technologies at home and abroad, is accepted widely for its effectiveness. Due to relief characteristics, this method is not used in loess areas. Wuxi Institute of Petroleum and Geology improved gathering tools, developed a portable device of free hydrocarbons gathering, and applied the device to areas filled by loess. The study received a good result.