Quick quantitative wellsite log evaluation with the R/sub xo/R/sub t/ curve
Journal Article
·
· Log Anal.; (United States)
OSTI ID:5982727
The R/sub xo/R/sub t/ method for wellsite interpretation was offered in 1972 as a qualitative means of locating producible hydrocarbons from open hole logs. The technique depends on the existence of adequate invasion (not too deep nor too shallow). The method does not require the knowledge of porosity and can, therefore, be used in complex lithologies. It does not require the knowledge of R/sub mf/ nor of R/sub w/, and can therefore be used where formation waters are highly variable. The method works equally well in shaly sands provided it is known for certain that such sands are shaly and not just fresh water bearing. The quantitative approach to the R/sub xo/R/sub t/ interpretation gives directly water saturation based on Archie's equation using an appropriate saturation exponent. For further evaluation of productivity, other formation parameters are needed but these are generally not required for quick-look at the well-site decision making when the R/sub xo/R/sub t/ curve is available.
- OSTI ID:
- 5982727
- Journal Information:
- Log Anal.; (United States), Journal Name: Log Anal.; (United States) Vol. 19:6; ISSN LGALA
- Country of Publication:
- United States
- Language:
- English
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