Formation factor of carbonate rocks with microporosity: model calculations

Influences of variation of porosity at a microscopic level on cementation exponent m are computed using the effective-medium theories. It was found that solution pores or vugs lead to an increase in the cementation exponent m, whereas large grains, such as filled solution pores lead to a decrease in m. Application to data on a set of carbonate rocks from a given field gave reasonable agreement.