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Post-stack reservoir inversion characterization technique
2021-03-29The properties of amplitude, phase and frequency of the full stack seismic data mainly reflect the information of the reflective interface, and the properties of the reflective interface are used to interprete the lithology, physical properties and oil-bearing properties of the real underground formation. Even the most basic structural layer interpretation is also misjudged in some cases. Post-stack seismic inversion converts seismic reflection information into elastic information such as acoustic impedance of formations, from qualitative to quantitative, and interprete formations under the guidance of physical meaning, including tectonic amplitude, lithology, porosity and oil and gas content, so as to achieve quantitative and fine characterization of reservoirs.
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Precise structural interpretation techniques
2021-03-05Fracture interpretation is the top priority of structural interpretation, and the development of three-dimensional visualization technology has greatly improved the efficiency and accuracy of structural interpretation. In the fracture interpretation, the section matched with the plane, the waveform matched with the attribute, and the three-dimensional body matched with flat section, which truly achieves the full three-dimensional fracture interpretation. It ensures the efficiency and accuracy of the interpretation and lays a solid foundation for the fracture model and reservoir research of subsequent reservoir prediction.
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Prestack reservoir inversion technique
2021-03-05In addition to the acoustic impedance, the prestack inversion based on the gather data introduces a series of processes such as Vp/Vs ratio and density parameters, accurate curve correction, petrophysical modeling and analysis, gather optimization processing quality control, speed optimization, and stack of prestack gather, laying a solid foundation for the pre-stack inversion. The combined interpretation of the acoustic impedance and the Vp/Vs ratio guided by rock physics study can effectively distinguish lithology, rock properties and even fluid properties.
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