Univrsity of Tehran Press Geopersia 2228-7817 1 1 2011 03 01 The effect of rock types on pore volume compressibility of limestone and dolomite samples The effect of rock types on pore volume compressibility of limestone and dolomite samples 37 82 22163 10.22059/jgeope.2011.22163 EN Hesam Al Vaki Aloki Bakhtiari Institute of Petroleum Industry Amin Moosavi Tarbiat Modares University Ezatollah Kazemzadeh Institute of Petroleum Industry Kamran Goshtasbi Tarbiat Modares University Mohammad Reza Esfahani Institute of Petroleum Industry Jafar Vali nstitute of Petroleum Industry Journal Article Determination of porosity, permeability, and pore volume compressibility of reservoir rocks and those variations with effective stress changes are of great interest in petroleum engineering. This paper has studied the influence of pore types of carbonate reservoir rocks on pore volume compressibility as well as Klinkenberg permeability and porosity at different stress values. In the current study pore volume compressibility tests have been done on 38 limestone and 8 dolomite samples. The experiments show the importance of rock type description of the reservoir rocks. Carbonate rocks with touching vug pores have different behavior from the other studied carbonates in this paper. This complex behavior is related to the role of connecting paths closure on the characteristics of hydraulic conductivity of the rock while there is no more changes in porosity or volume change. It means that the planar connecting paths have more effect on hydraulic conductivity of this rock type, while it has not more effect on porosity. Also, in all rock types excluding touching vuggy pores limestone, increasing the initial porosity leads to increase the permeability at the same effective stress value. Determination of porosity, permeability, and pore volume compressibility of reservoir rocks and those variations with effective stress changes are of great interest in petroleum engineering. This paper has studied the influence of pore types of carbonate reservoir rocks on pore volume compressibility as well as Klinkenberg permeability and porosity at different stress values. In the current study pore volume compressibility tests have been done on 38 limestone and 8 dolomite samples. The experiments show the importance of rock type description of the reservoir rocks. Carbonate rocks with touching vug pores have different behavior from the other studied carbonates in this paper. This complex behavior is related to the role of connecting paths closure on the characteristics of hydraulic conductivity of the rock while there is no more changes in porosity or volume change. It means that the planar connecting paths have more effect on hydraulic conductivity of this rock type, while it has not more effect on porosity. Also, in all rock types excluding touching vuggy pores limestone, increasing the initial porosity leads to increase the permeability at the same effective stress value. https://geopersia.ut.ac.ir/article_22163_554b4a990f21efe6f39dfbec92d0f057.pdf