Enhanced carbon-oxygen log interpretations using supplemental log curves
Supplemental measurements from induced nuclear spectrometry tools are examined to demonstrate what additional information they provide about the well and reservoir conditions. Logs in shut-in wells from Indonesia provide examples of oxygen activation measurements showing cross-flow from one reservoir to another via open perforations. Leaking squeezed perforations were also observed. An example from Alaska shows radioactive scale build-up in the casing which spectral analysis identifies as a mixture of uranium and thorium salts. Another log, where the casing fluid was replaced with crude oil, demonstrates a technique for identifying cement channels. Logs from Nigeria comparing oil saturation estimates before and after a squeeze operation illustrate the effect of casing fluid flushing of the formation through open perforations. Understanding the diagnostic character of these curves leads to higher confidence in the overall log interpretation process.
- OSTI ID:
- 113413
- Report Number(s):
- CONF-941131-; TRN: IM9544%%373
- Resource Relation:
- Conference: Asia Pacific oil and gas conference: regional growth - meeting the change, Melbourne (Australia), 7-10 Nov 1994; Other Information: PBD: 1994; Related Information: Is Part Of Asia Pacific oil and gas conference: Proceedings; PB: 715 p.
- Country of Publication:
- United States
- Language:
- English
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