Crosshole EM for oil field characterization and EOR monitoring: Field examples
- Lawrence Livermore National Lab., CA (United States)
- Schlumberger-Doll Research, Ridgefield, CT (United States)
- Univ. of California, Berkeley, CA (United States)
Crosshole and surface-to-borehole electromagnetic (EM) imaging is applied to reservoir characterization and steam flood monitoring in a central California oil field. Steam was injected into 3 stacked eastward dipping unconsolidated oil sands. EM measurements were made from two fiberglass-cased observation wells straddling the steam injector on a northeast-southwest profile. Field data were collected before the initiation of a steam drive to map the distribution of the oil sands and then six months after the steam was injected to monitor the progress of the steam chest. Resistivity images derived from the collected data could clearly delineate the distribution and dipping structure on the target oil sands. Difference images from data collected before and after steam flooding indicate that the steam chest has developed only in the deeper oil sands and it has preferentially migrated eastward.
- OSTI ID:
- 93138
- Report Number(s):
- CONF-941015--
- Country of Publication:
- United States
- Language:
- English
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