Pseudo 2.5 D simulation method for resistivity logging-while-drilling response
The invention discloses a pseudo 2.5 D simulation method for resistivity logging response while drilling. The pseudo 2.5 D simulation method comprises the following steps: establishing a stratum coordinate system; geologic body boundary coordinates are obtained; determining rock physical parameters...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a pseudo 2.5 D simulation method for resistivity logging response while drilling. The pseudo 2.5 D simulation method comprises the following steps: establishing a stratum coordinate system; geologic body boundary coordinates are obtained; determining rock physical parameters of geologic body categories so as to build a two-dimensional stratum model; determining coordinates of a current logging point; determining the range of a computational domain, and determining the distribution of electrical parameters in the computational domain; determining a dimension reduction window; using a dimension reduction window to extract a formation interface position and a formation interface slope in the two-dimensional formation model to establish a one-dimensional model; one one-dimensional model is correspondingly established for each dimension reduction window; respectively calculating the logging response of each one-dimensional model; and performing weighted average processing on the resistivity |
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