非近海河流相层序地层学探讨 ——以济阳坳陷新近系为例
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房煦,男,在读硕士研究生,从事沉积学、层序地层学研究。联系电话:15589821151,E-mail:slytfx@163.com。

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国家“973”计划“深部油气储层综合地球物理探测和评价方法”(2013CB228605)


Discussion on non-coastal fluvial facies sequence stratigraphy: an example from the Neogene in Jiyang depression
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    摘要:

    目前中国对于河流相层序的研究大多套用国外近海冲积平原环境下的河流相层序地层学模式,该模式认为海平面升降为河流相层序发育的主要控制因素。对于中国陆相盆地中发育的不受海平面升降影响的河流相地层来说,应用以海平面变化作为主要控制因素的近海河流相层序地层学模式解释其层序发育不具备客观前提。借鉴中外河流相层序地层学研究成果,遵循层序地层学及沉积学基本原理,在掌握层序形成机制的基础上,分析了非近海河流相层序发育的主控因素,同时结合济阳坳陷新近系河流相地层沉积模式,探讨并建立了非近海河流相层序地层学模式,指出了可能存在的资源分布。研究结果表明,非近海河流相层序形成的主控因素为构造沉降、沉积物供给、地形坡度和气候,存在初始体系域、发展体系域、衰退体系域,若基底发生差异性抬升,还可发育抬升体系域。

    Abstract:

    The sequence of non-coastal fluvial facies stratum which developed in continental basin of China is not controlled by the sea level eustacy. Therefore the cosatal fluvial facies sequence stratigraphic model is no longer applicable. This calls for a new fluvial facies sequence model which is not affected by sea level eustacy. This paper, with references to the domestic and foreign research results of fluvial facies sequence stratigraphy, combining with spatial combination styles of fluvial sedimentary system and the controlling factors of river types, following the principles of sequence stratigraphy and sedimentology,summarized the major controlling factors of non-coastal fluvial sequence. Considering the study of the sedimentary patterns of the Neogene in Jiyang depression, the non-coastal fluvial facies sequence stratigraphic model was discussed and established and its potential resources distribution was pointed out. The development of non-coastal fluvial sequence is mainly controlled by tectonic subsidence, sediment supply, topographic slope and climate. Non-coastal fluvial facies sequence may exist initial system tract,growth system tract and decline system tract. When differential uplift of the basin basement occurs,uplifting system tract may also occur.

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房煦.非近海河流相层序地层学探讨 ——以济阳坳陷新近系为例[J].油气地质与采收率,2014,21(6):10~14

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  • 在线发布日期: 2015-06-04