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利用储层岩石抽提物的饱和烃色质总离子图的指纹特征判识储层的流体（油、气）类型。油层或油饱和的储层，饱和烃色质总离子流图的特征是正构烷烃碳数分布宽，碳数分布在Ｃ１５～Ｃ３８之间，与原油样品的正构烷烃碳数分布相似；凝析气层的正构烷烃碳数分布略窄一些，碳数分布在Ｃ１５～Ｃ３５之间，低碳数（小于Ｃ２１）的正构烷烃相对于油层富集，高碳数（大于Ｃ２１）的正构烷烃丰度明显低于油层；干气层的正构烷烃碳数分布最窄，碳数分布在Ｃ１５～Ｃ２８之间，只有低碳数的正构烷烃，高碳数的正构烷烃丰度极低。据此可用来识别油层、凝析气层和干气层，也可用于一些测井资料不全或测井质量差的老井的油气层复查、测井难以识别的火成岩油气层的识别，还可用于地层评价，为油气酸化层位的优选提供科学依据。
The fluid (oil and gas) types of reservoirs are identified by the fingerprint features of the saturated hydrocarbon colorimetric total ion map of reservoir rocks. The characteristics of the oil-saturated or saturated oil-gas chromatographic-mass total ion chromatogram are that the n-alkane has a wide carbon number distribution and a carbon number distribution between C15 and C38, similar to the carbon number distribution of n-alkanes in the crude oil sample. The carbon number distribution of n-alkanes in the gas-bed is slightly narrower, the carbon number distribution is between C15 and C35, the n-alkanes with low carbon number (less than C21) are enriched with respect to the oil layer, and the carbon with higher carbon number (greater than C21) The abundance of alkanes is obviously lower than that of the oil layer. The dry matter has the narrowst carbon number distribution of n-alkanes, and the carbon number distribution is between C15 ~ C28. Only the n-alkanes with low carbon number and the n-alkanes with high carbon number Very low. According to this, it can be used to identify reservoirs, gas condensate reservoirs and dry gas reservoirs. It can also be used for oil and gas reservoir reexamination of old wells with poor logging data or well logging, well-recognizable identification of igneous reservoirs, and also In the evaluation of the strata, it provides a scientific basis for the optimization of the strata of oil and gas acidification.