Pore compressibility of heterogeneous carbonate rocks in the Asmari formation


1 Research Institute of Petroleum Industry, RIPI, P.O. Box 18745-4163

2 Institute of Geophysics, University of Tehran, P.O. Box 14155-6466, Tehran, Iran

3 Science Department, University of Tehran, P.O. Box 14155-6455


Compressibility of hydrocarbon reservoir rocks is a key parameter, which affects reservoir, seismic and mechanical properties. The objective of the present study is the investigation of pore compressibility with changes on net confining pressure in the carbonate rocks. For this purpose the effects of texture, pore geometry and porosity values on pore compressibility have been analyzed. A total number of 90 samples of Asmari formation carbonates were selected from an oil field in the south of Iran. After geological study and grouping of the samples based on texture and pore geometry, the relation between pore compressibility and net confining pressure has been presented by an equation for each group of rocks.