2006•Journal of Oil and Gas TechnologyRequires access

Characteristics of Distribution and Migration of Neutral Nitrogen Compounds in Shuangnan Oilfield of Liaohe Basin

Zhu Cuishan

Abstract

The distribution, composition and concentration changes of neutral nitrogen compounds in crude oil from Shuangnan Oilfield are studied by quantitatively separating and analyzing the nitrogen compounds. The results showed that there are two distribution models of alkylcarbazole series with high and low abundance of C-1 substitutes in those oils, corresponding to Shahejie Formation source rocks from the west depression of Liaohe Basin. Based on the changes of maturity parameters, such as sterane and terpane, the concentrations of neutral nitrogen compounds and migration parameters in the crude oils, and combined with the backgrounds of regional geology, the crude oil in Shuangnan Oilfield is mainly derived from Qingshui Sag. The migration direction of crude oil is from well S201 to Well S110-1 and Well S202.

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Key concepts: Sterane, Nitrogen, Maturity (psychological), Structural basin, Source rock, Geology, Crude oil, Geochemistry