An experimental investigation on the poroelastic response of a water-saturated limestone to hydrostatic compression

This contribution addresses an experimental study on the poroelastic behavior of a water-saturated limestone. Samples come from Sarvak limestone, major hydrocarbon-producing reservoir in Iran. Three back-saturated intact specimens were subjected to hydrostatic compression with different boundary pressure conditions. A coherent workflow testing data interpretation was established efficiently deal possible sources uncertainty and provide accurate results. Obtained results revealed that drained undrained bulk moduli, as well Biot Skempton coefficients, strongly depend applied Terzaghi effective stress. Conversely, calculated values for unjacketed solid modulus $$ {K}_s^{\prime } found be constant range stresses. Variations moduli stress modeled used extract depth-dependent properties studied lithotype along well. Besides, evaluated utilized verify linear theory poroelasticity. The indirectly pore \prime appeared highly variable changes possesses even negative when coefficient is lower than critical value. comparison between deformation main mineral constituents Ks also disclosed they are basically uncorrelated, assumption ideal porous rock, }={K}_s^{\prime }={K}_s , does not hold general examined rock samples. Nevertheless, consideration ideality poroelasticity may result reliable estimates certain circumstances, particularly at high