高邮凹陷北斜坡戴南组原油运移特征分析

摘要

In Dainan Formation of the research area, the display of oil and gas is very active and the accumulation condition is good. Two oil families ,that is oil from E2f4 and E1f2 respectively, have been recognized according to the oil geochemical characteristics of Hua 24, Hua3, Hual3, Hua6 and Sha49. Migration directions of hydrocarbon are discussed by geochemical parameters such as physical and chemical properties, biomarker compound, and nitrogen compounds. Research results show that oil of E1f4 mainly came from the dark mudstone of E1f4;the oil sources of E1f2 is mainly came from the nearby mature source rock of E1f2, and accumulated through long distance vertical migration.%研究区戴南组油气显示活跃，成藏条件有利。通过对花24块、花3块、花13块、花6块以及沙49块戴南组原油地球化学特征分析，确定了研究区戴南组原油的来源问题，并据不同油源将研究区内戴南组原油分为两种类型，即阜四段原油和阜二段原油。综合研究了原油的物理、化学性质以及生物标志物、含氮化合物等特征，详细分析了原油的运移方向。研究结果表明戴南组原油中阜四段油源主要来自深凹带刘五舍次凹成熟的阜四段烃源岩，阜二段油源主要来自附近成熟的阜二段烃源岩生油．经长距离垂向运移成藏。