HYDROCARBON PRESERVATION CONDITIONS IN LONGMEN MOUNTAIN, WEST SICHUAN BASIN
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摘要: 在对国内外推覆带油气研究现状调研的基础上,从构造形变、盖层及油水与油气保存关系等方面,对龙门山逆冲推覆带油气保存进行深入研究,总结油气成藏主控因素。在区带评价的基础上,指出江油—都江堰断裂以东保存条件好,有利于油气成藏。建立了龙门山逆冲推覆带构造形变保存模式,以及适应本区特征的评价技术方法和指标。据此预测石板滩背斜、鸭子河背斜为龙门山前有利勘探目标。Abstract: Based on researches of hydrocarbon in thrust nappe belt at home and abroad,from aspects such as tectonic deformation,cover,and relationship between hydrocarbon and preservation,studies of oil-and-gas preservation have been carried out in the Longmen Mountain thrust nappe belt.Main controlling factors of accumulation have been summarized.On the basis of zone evaluation,it has been pointed out that,the east to the Jiangyou-Dujiangyan fracture is favorable for hydrocarbon preservation and accumulation.Tectonic deformation preservation model of the Longmen Mountain thrust nappe belt has been set up.Evaluation methods and index adapted to the study area have been concluded.The Shanbantan and Yazihe anticlines have been predicted as favorable exploration targets.
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