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地表轻烃通量是指单位时间内通过地面单位面积的轻烃克分子数.本文探讨了将其作为石油化探新指标的基本原理,设计了测量方法,并在酒西盆地作了探索性的应用.在老君庙已知油田区附近发现了明显的C_1—C_4通量异常,C_5以上较重的烷径可能是地面原油污染所致.在北祁连逆冲带前缘青面凹陷未知区,根据异常图推断出两组构造线方向,圈出了若干有利区块,并对油气运移趋势提供了新的证据.该方法可望成为一种油气勘探的有效手段.
The surface light hydrocarbon flux refers to the number of light hydrocarbon molecules that pass through the ground per unit area in a unit time.This paper discusses the basic principle of using it as a new index of petroleum geochemical exploration and designs a measuring method and makes exploratory The obvious C_1-C_4 flux anomaly was found in the oilfield area known as Laojunmiao, and the heavier carbon diameter above C_5 may be caused by the crude oil pollution in the ground.On the front of the North Qilian thrust belt, In the unknown area, two sets of tectonic lines are inferred from the anomaly map, and several favorable blocks are excavated, and new evidence is provided for the trend of hydrocarbon migration. This method is expected to become an effective means of oil and gas exploration.