鄂尔多斯盆地富县地区延长组长7湖相页岩油地质特征及勘探潜力评价

doi:10.3969/j.issn.1672-7703.2018.06.004

摘要/Abstract

摘要： 从页岩的空间展布特征、岩相特征、生烃特征、储集条件及页岩中滞留烃特征等方面，研究鄂尔多盆地富县地区延长组长7湖相页岩油的地质特征，评价页岩油的勘探潜力，优选有利目标区。研究表明，富县地区延长组长7页岩分布广泛，页岩中砂质纹层发育，含粉砂质纹层黑色页岩为页岩油赋存的最优岩相。对页岩的地球化学参数（热解S₁、氯仿沥青“A”含量、TOC值、R_o、游离烃含量等）、储集条件、含油气性等方面进行了系统分析，认为富县地区长7湖相页岩具备页岩油富集和聚集成藏的条件。采用热解参数S₁法计算的页岩油资源量可达12.94×10⁸t。综合评价生油潜力、储集能力、页岩油可动性等方面，优选出勘探有利区452km²。

关键词: 页岩油, 地质特征, 勘探潜力评价, 延长组长7, 鄂尔多斯盆地, 富县地区

Abstract: Based on spatial distribution, petrophysics, hydrocarbon generation, reservoir conditions and hydrocarbon retention, the geological characteristics of the Chang 7 lacustrine shale oil in the Yanchang Formation in the Fuxian area of the Ordo Basin was studied for evaluating the exploration potential, and selecting favorable targets. The study shows that the Chang 7 shale is widely distributed, the sandy laminae in the shale is developed, and the black shale containing silty laminae is the optimal lithofacies for shale oil. The statistics of geochemical parameters (pyrolysis S₁, chloroform asphalt "A", TOC, R_o, free hydrocarbon content, etc.), reservoir conditions, hydrocarbon-bearing properties indicate that lacustrine shale has the conditions for shale oil enrichment and accumulation. The shale oil resource calculated with pyrolysis S₁ is 12.94×10⁸ tons. According to comprehensive evaluation on the oil potential, reservoir capacity, shale oil mobility, etc., the favorable exploration area is up to 452 km².

Key words: shale oil, geological characteristics, exploration potential evaluation, Chang 7 of Yanchang Formation, Ordos Basin, Fuxian area

中图分类号:

孙建博, 孙兵华, 赵谦平, 姜呈馥, 刘刚, 尹锦涛, 高潮, 郭超. 鄂尔多斯盆地富县地区延长组长7湖相页岩油地质特征及勘探潜力评价[J]. 中国石油勘探, 2018, 23(6): 29-37.

Sun Jianbo, Sun Binghua, Zhao Qianping, Jiang Chengfu, Liu Gang, Yin Jintao, Gao Chao, Guo Chao. Geological characteristics and exploration potential evaluation of Chang 7 lacustrine shale oil in Yanchang Formation, Fuxian area, Ordos Basin[J]. China Petroleum Exploration, 2018, 23(6): 29-37.

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