Artificial physical modelling of Organic-rich shale and its similarity evaluation with natural shale

来源 :EAGE-SCA International Symposium on Digital Rock Physics and | 被引量 : 0次 | 上传用户:aiminis
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  Theoretical rock-physical models and experimental measurement in natural organic-rich shale tend to be restricted to specific lithologies and quantity,thus resist generalization.An alternative approach to overcome such challenge is to work with well-controlled analogs where it is possible to accurately quantify desired factors and investigate their effect separately.This study propose a novel hot-pressing technique to create realistic synthetic organic-rich shale that take into account both diagenetic pressure and temperature,for which we design an automatic thermoregulatory and pressure-controlled system.Quartz,calcite,illite powders(more than 4000 mesh)and organic matter as well as the associated ranges of percentage are predesigned for modelling,temperature and pressure were calculated and calibrated based on the buried depth of target shale layer.The model exhibits P-wave and S-wave anisotropy(ε,γ)with magnitude of 23%and 16%,porosity of less than 5%,permeability of less than 0.1mDa,density of more than 2.1g/cc,bulk modules of 15.4Gpa,Young modules of 28.3Gpa,Poissons ratio of 0.194.Furthermore,microstructural features of organic matter and non-organic composition in the synthetic shale by SEM imaging shows similar spatial distribution with natural shale.
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