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Neutron count in time interval
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| body | \tau = [\tau_1, \, \tau_2] |
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Neutron Porosity
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N_{near}[\tau] = \int_{\tau_1}^{\tau_2} N_{near}(t) dt |
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\phi_T = N2F[\tau] + \Delta_{\tau}(\phi_N) |
Neutron Sigma
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N_{near}(t) = N_{near}(0) \exp ( - t \, \Sigma_{near} ) |
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\Sigma_{far} = \Sigma_{frm} + \Delta_{far}(\phi) |
Neutron Saturation
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\Sigma_{frm} = (1-\phi) \, \Sigma_m + \phi \, ( \Sigma_w \, s_w + \Sigma_o \, s_o +\Sigma_g \, s_g) |
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\Sigma_m = (1-V_{sh}) \, \Sigma_{lms} + V_{sh} \, \Sigma_{sh} |
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TSCN, TSCF, NPHI, SIGMA
References
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SPE162074 – Memory Pulsed Neutron-Neutron Logging
