Formation Factor Relationships of Western Canada


Brian C. Mahood, Amax Petroleum of Canada Inc.,
Douglas A. Boyd, Core Laboratories

SPWLA 34th Annual Logging Symposium, June 13-16, 1993



Archie’s formation resistivity factor and saturation exponent equations are the basis of quantitative log analysis. Canadian practitioners of formation eval- uation in Alberta are fortunate that formation factor measurements are catalogued and made available to the public under Section 11.040 of the Alberta Oil and Gas Conservation Regulations. Access to this information presented the opportunity to evaluate the ‘a’, ‘in’ and ‘n’ terms with respect to overburden stress dependency, the variability of the values, lithology dependence and the possible interdependence of these three parameters.