| US 7,501,818 B2 | ||
| System and methods for T1-based logging | ||
| Ridvan Akkurt, Kingwood, Tex. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Houston, Tex. (US) | ||
| Filed on Mar. 29, 2007, as Appl. No. 11/731,121. | ||
| Application 11/731121 is a division of application No. 10/957406, filed on Oct. 01, 2004, granted, now 7,199,580. | ||
| Claims priority of provisional application 60/508442, filed on Oct. 03, 2003. | ||
| Prior Publication US 2007/0241750 A1, Oct. 18, 2007 | ||
| Int. Cl. G01V 3/00 (2006.01) | ||
| U.S. Cl. 324—303 [324/306] | 12 Claims |
| 1. An NMR method for analyzing geologic formations, comprising the step of:
providing a distribution of NMR T1 relaxation times corresponding to an NMR log of the geologic formation obtained with a maximum wait time Twmax such that Twmax<αT1max, where T1max is the longest component in the T1 spectrum of the NMR signal and α is a constant less than 5; and
computing a correction for insufficient polarization of the NMR log based solely on the provided distribution of NMR T1 relaxation times and acquisition parameters of the NMR log.
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