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Quantitative interpretation of pulsed neutron capture logs: Part 1 — Fast numerical simulation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mimoun, Jordan G. Torres-Verdín, Carlos Preeg, William E. |
| Copyright Year | 2011 |
| Abstract | Pulsed neutron capture (PNC) logs are commonly used for formation evaluation behind casing and to assess time-lapse variations of hydrocarbon pore volume. Because conventional interpretation methods for Σ logs assume homogeneous formations, errors may arise, especially in thinly bedded formations, when appraising petrophysical properties of hydrocarbon-bearing beds. There exist no quantitative interpretation methods to account for shoulder-bed effects on Σ logs acquired in sand-shale laminated reservoirs. Because of diffusion effects between dissimilar beds, Σ logs acquired in such formations do not obey mixing laws between the Σ responses of pure-sand and pure-shale end members of the sedimentary sequence. We have developed a new numerical method to simulate PNC rapidly and accurately logs. The method makes use of late-time, thermal-neutron flux sensitivity functions (FSFs) to describe the contribution of multilayer formations toward the measured capture cross section. It includes a correction procedure ... |
| File Format | PDF HTM / HTML |
| DOI | 10.1190/1.3569600 |
| Alternate Webpage(s) | https://faculty.engr.utexas.edu/sites/default/files/5-mimoun-geophysics_part_i.pdf |
| Alternate Webpage(s) | https://doi.org/10.1190/1.3569600 |
| Volume Number | 76 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
