Quantitative Evaluation Of Shale Pore Connectivity Using Spontaneous Imbibition And Mercury Intrusion Capillary Pressure Methods
P. Zhang and J. Li
Event name: EAGE Conference on Reservoir Geoscience 2018
Session: Session 9: Unconventional Reservoirs
Publication date: 03 December 2018
Info: Extended abstract, PDF ( 797.88Kb )
Price: € 20
Shale oil and gas can be recovered from the shale matrix through the interconnected pore networks. The migration of hydrocarbon molecules within the shale matrix is controlled by the pore connectivity. However, few studies have been done on pore connectivity of shale matrix. In this study, spontaneous imbibition and mercury intrusion capillary pressure methods were selected to quantitatively evaluate the pore connectivity of shale matrix. The pore connectivity should be characterized by the slope in the first imbibition stage and the small spontaneous imbibition slope values (mean 0.3963) indicate the poor pore connectivity of shale matrix. The permeability, effective and geometrical tortuosity obtained from MICP can quantitatively evaluate the pore connectivity, which agrees well with the spontaneous imbibition slope. Therefore, shale matrix pore connectivity can be effectively characterized by the spontaneous imbibition and MICP methods.