泥页岩岩石物理参数测试与分析
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刘书会(1964—),女,河北栾城人,教授级高级工程师,博士,从事地震地质综合解释方面的研究。联系电话:(0546)8715350, E-mail:guaya1@sina.com。

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国家科技重大专项“渤海湾盆地精细勘探关键技术”(2016ZX05006-003)


Research on measurement and analysis of shale rock physical parameters
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    摘要:

    泥页岩主要由粘土、碳酸盐矿物和有机质构成,其岩石物理参数主要受这3种成分的影响。由于泥页岩岩石特征的复杂性,尚未有较成熟的岩石物理模型描述其岩性与速度的关系。泥页岩岩石物理基础实验是研究其岩性、含油气性与速度关系的有效方法,济阳坳陷在这方面的研究尚处于起步阶段。通过对渤南地区罗69井泥页岩岩心样品的实验室测试,获得相关的物性参数(密度、孔隙度等)、弹性参数(纵、横波速度及泊松比等)、有机地化参数(有机碳含量)和岩石组构参数。通过对这些参数的交会分析,发现弹性参数(P型、S型、C型参数)可用于泥页岩岩性的区分,而有机碳含量和碳酸盐矿物含量是泥页岩密度和纵、横波速度的重要影响因素。不同温度和压力条件下泥页岩岩心样品纵、横波速度的变化规律表明,纵波速度对压力的变化较为敏感,而横波速度对温度的变化较为敏感。研究成果可以为开展泥页岩地球物理特征评价奠定基础。

    Abstract:

    Shale rock is mainly composed of carbonate rock,clay and organic matter,and its rock physical and elastic parameters are mainly controlled by the influence of the three kinds of material. There is no mature rock physics models describing the relationship between lithology and velocity because of the complexity of the rock characteristics of the shale.Basic rock physics experiment of shale is an effective method to study the relationship of the shale lithology,oiliness and velocity,and such research in Jiyang depression is still in its infancy. Shale relevant physical parameters(density,porosity,etc.),the elastic parameters(P-wave velocity and S-wave wave velocity and Poisson’s ratio,etc.),organic geochemical parameters(organic carbon content)and rock fabric parameters were obtained through the laboratory tests on shale samples from Well Luo69. It is found that the elastic parameters(P,S,C type parameters)can be used for identification of shale lithology by analysis of the intersection of these parameters while the organic carbon content and carbonate mineral content are important factors influencing shale density and its P-wave and S-wave velocities. The variations of P-wave velocity and S-wave velocity of shale samples obtained under different conditions of temperature and pressure show that P-wave velocity is more sensitive to the change of pressure,and S-wave velocity is more sensitive to the change of temperature. The research results obtained can lay a foundation for the evaluation of the shale geophysical characteristics.

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刘书会,王长江,罗红梅,汪贺.泥页岩岩石物理参数测试与分析[J].油气地质与采收率,2016,23(6):16~21

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  • 在线发布日期: 2016-10-20