| 摘要 |
A method for evaluating a characteristic of a formation adjacent a wellbore comprises emitting a neutron field into the formation from a neutron source, obtaining data comprising a long neutron neutron (LNN), short neutron neutron (SNN), long neutron gamma (LNG) and short neutron gamma data (SNG) from the neutron field emitted into the formation and combining the long data with the short data to reduce error associated with the characteristic to be evaluated. A detector for evaluating a characteristic of a formation includes a neutron source and detectors for detecting LNN, SNN, LNG, SNG. |
