Carbazoles are polar compounds in oils, and they are useful indicators for study of hydrocarbon migration.
咔唑类化合物是原油中极性较大的化合物，是研究油气运移的有效指标。
The absorbed hydrocarbon is one of the major indicators in the oil gas geochemical exploration. it can directly reflect the hydrocarbon gas transmited out from oil gas accumulation.
吸附烃是油气化探的主要指标之一，它直接反映从油气藏运移出来的烃类气体。
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