摘要
针对鄂尔多斯盆地延长组致密油充注、运移、成藏研究中存在的问题,运用原油中性含氮化合物测试技术,研究了志丹油田纸坊区延长组石油充注方向。结果表明:纸坊区延长组原油具有相同的成因和相似的热演化程度;石油总体由中部向西部、东北部发生充注,具体表现为:沿着充注方向,原油中性含氮化合物总量增加、原油成熟度逐渐降低、暴露型化合物相对含量增加。原油充注方向与烃源岩厚度变薄所指示的方向一致,且以短距离充注为主。研究结果对延长组致密油成藏机理研究及勘探选区评价具有积极意义。
Oil charging,migration and accumulation into the tight reservoir of the Yanchang Formation in the Ordos Basin remain controversary.In order to solve the problem,oil charging direction of the Yanchang Formation in the Zhifang area of the Zhidan Oilfield was studied as a case using the neutral nitrogen compounds of crude oil as indicators.Results show that all the crude oil in the Yanchang Formation of the Zhifang area presents the same source and similar thermal evolutionary degree.They were gradually filled from the central part to the west and northeast.Along the direction of oil charging,the total of neutral nitrogen compounds in crude oil increases,the maturity of crude oil decreases,and the relative content of exposed compounds increases.The direction of crude oil charging is consistent with the thinning out of the source rock,and the migration distance is in fact very short.The research results are helpful to the study of the formation of oil fields in tight oil reservoirs of the Yanchang Formation.
作者
李媛
白玉彬
孙昆
LI Yuan;BAI Yubin;SUN Kun(Zhidan Oil Production,Yanchang Oilfield Corporation,Yan’an 717500,Shaanxi Province,China;School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi′an 710065,China)
出处
《海洋地质前沿》
CSCD
2020年第3期51-56,共6页
Marine Geology Frontiers
基金
陕西省教育厅科研计划“鄂尔多斯盆地志丹地区长9、长10致密油形成机理研究”(18JS090)
陕西省自然科学基础研究计划“湖相富有机质页岩储集空间定量表征及含油性研究”(2017JM4014).
