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Carbonate rocks resistivity determination using dual and triple porosity conductivity models

Petroleum 2020年第1期6卷 35-42页

作者： Zeeshan Tariq Mohamed Mahmoud Hasan Al-Youssef Mohammad Rasheed Khan Department of Petroleum Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia

The rocks may be classified as Archie rocks or Non-Archie rocks,depending on the link between pore structure and resistivity of the *** carbonate rocks,keeping this factor in view,the applicability of Archie's law tends to be unreasonable and employing Archie's equation will ultimately lead to inaccurate estimates of the water *** investigators have reported models that forms a link between laboratory results and field well logs to determine water saturation in intricate pore *** case of complex systems,Archie's law fails to correctly define the resistivity-index *** addition,it is imperative to carry out investigations at lower saturation values in order to elaborate the non-Archie *** brings the dual and triple porosity conductivity models into the *** these models are essential in defining the considerable changes of the resistivity-index curves,both qualitatively and *** linkage between the two models is depicted electrically in series or in ***,it is possible to have a combination of the two *** a result,the experimental results can be modeled accurately using least *** work presents two models to determine water saturation in carbonate rocks,containing dual and triple porosity *** study also investigates the impact of different influential parameters such as saturation exponents,conductivity ratios,and pore volume fraction of each network systems,on the new ***,the effect of each parameter is individually studied and the sensitivity analysis on the RI curves is produced.A new approach to apply these models is also explained which requires the use of NMR log,mercury injection capillary pressure(MICP)measurement,and simple plotting techniques to determine the water *** proposed new models help petrophysicists to estimate water saturation in Non-Archie rocks,containing double and triple porosity network systems.

关键词： Dual porosity triple porosity Carbonate rocks Water saturation models

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