华庆地区长8原油含氮化合物及运移研究

发布时间：2018-02-24 22:26

本文关键词： 鄂尔多斯盆地华庆地区含氮化合物油气运移油藏地球化学　出处：《中国矿业大学学报》2017年04期 　论文类型：期刊论文

【摘要】：为了认识华庆地区长8油层组原油成藏过程,首次应用含氮化合物组成,结合该油层组剩余压力和流体包裹体特征,研究了原油充注点和运移方向、原油充注的动力特征、期次和时间,认为华庆地区长8油层组原油中咔唑类化合物的运移分馏效应显著,储层包裹体均一温度分布特征反映原油经历了3次运移期和充注期.研究结果表明:在横向上,原油样品中咔唑类化合物的绝对含量由南向北和由东向西减小,而咔唑类化合物异构体比值则由南向北和由东向西增加,反映了长8原油具有2个充注点和运移方向,即从研究区南部和东部充注,向北部和西部方向运移;在纵向上,从长7至长8、长10油层组,咔唑类化合物的绝对含量逐渐减小,而咔唑类化合物异构体比值则逐渐增大,反映了原油由上向下运移,即从长7油层组向长8运移.华庆地区长8原油这种充注点和运移方向与长7油层组和长8油层组之间的剩余压力差以及长8油层组剩余压力分布特征相一致.储层包裹体均一温度分布表现为3个显著的主峰温度,即80℃,100℃和120~130℃.根据盆地埋藏史和热史,推测原油注入长8储集层的地质时间为侏罗世末期-早白垩世晚期.
[Abstract]:In order to understand the oil accumulation process of Chang 8 formation in Huaqing area, nitrogen compounds were used for the first time. Combined with the residual pressure and fluid inclusion characteristics of the formation, the filling point and migration direction of crude oil and the dynamic characteristics of oil filling were studied. The migration and fractionation effect of carbazole compounds in Chang8 formation crude oil of Huaqing area is significant. The homogeneous temperature distribution of reservoir inclusions shows that the crude oil has experienced three migration periods and charging periods. The results show that the absolute content of carbazole compounds in crude oil samples decreases from south to north and from east to west. The ratio of isomers of carbazole compounds increased from south to north and from east to west, indicating that Chang8 crude oil has two filling points and migration directions, that is, from the south and east of the study area to the north and west. From Chang 7 to Chang 8 and Chang 10, the absolute content of carbazole compounds decreases and the ratio of isomers of carbazole compounds increases, which reflects the migration of crude oil from top to bottom. The filling point and migration direction of Chang8 crude oil in Huaqing area are consistent with the residual pressure difference between Chang7 reservoir and Chang8 reservoir and the distribution characteristics of residual pressure in Chang8 reservoir. The homogeneous temperature distribution of reservoir inclusions shows three significant main peak temperatures. According to the burial history and thermal history of the basin, the geological time of oil injection into Chang 8 reservoir is estimated to be the late Jurassic to the late early Cretaceous.
【作者单位】：中国石油长庆油田公司;甘肃政法学院经济管理学院;甘肃省油气资源研究重点实验室中国科学院西北生态环境资源研究院;长安大学地球科学与资源学院;中国科学院大学;西南油气田分公司勘探开发研究院;中国石油勘探院西北分院;中国矿业大学资源与地球科学学院;
【基金】：国家自然科学基金项目(41272125,41472121)
【分类号】：P618.13

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