Parameters of Connected Conducting Model and Its Application in Dolomite Reservoir Evaluation

doi:10.7657/XJPG20220114

Abstract

Abstract:

Based on reservoir physical properties and the data of rock electricity, CT scan, nuclear magnetic resonance and thin slices, a method for determining the parameters of a connected conducting model is proposed for studying dolomite reservoirs, including the critical water-filled porosity, critical water saturation and critical conductivity index. Then the calculated critical water saturation is compared with the T₂ cut-off value, permeability, CT scan photos and thin slice analysis results, the critical conductivity index is compared with the cementation index, and the physical meanings of critical water saturation, critical water-filled porosity and critical conductivity index are discussed. The theoretical saturation curves from connected conduction is compared with the theoretical saturation curves from Archie’s formula, and the difference between them is discussed. Finally, according to the determined parameters of the connected conducting model, the water saturations of the dolomite reservoir in two wells are calculated using the connected conductance formula and the calculated results are consistent with formation test results.

Key words: dolomite reservoir, connected conducting model, Archie model, critical conductivity index, critical water-filled porosity, critical

CLC Number:

TE311

XIE Fang, CAI Deyang, LIU Ruilin, ZHANG Chengsen, FENG Cheng. Parameters of Connected Conducting Model and Its Application in Dolomite Reservoir Evaluation[J]. Xinjiang Petroleum Geology, 2022, 43(1): 92-101.

Figures/Tables 10

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Table 1

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