Calculation of Water Saturation of Dolomite Reservoir Based on Multi-Pore Structure Model
The accurate calculation of water saturation is an essential foundation for effective reservoir evaluation and oil and gas exploration. In the face of complex dolomite reservoirs in the M area, the saturation accuracy calculated using conventional logging methods often fails to meet expectations. Th...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
GeoScienceWorld
2025-06-01
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| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/gsa/lithosphere/article-pdf/doi/10.2113/2025/lithosphere_2024_255/659216/lithosphere_2024_255.pdf |
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| Summary: | The accurate calculation of water saturation is an essential foundation for effective reservoir evaluation and oil and gas exploration. In the face of complex dolomite reservoirs in the M area, the saturation accuracy calculated using conventional logging methods often fails to meet expectations. Therefore, based on the analysis of existing logging data and rock physics experiments, research on saturation calculation methods using rock electrical experimental data has been conducted. A calculation model for the saturation of dolomite reservoirs in the M area has been established to provide key parameters for reserve calculation. In the M area, the stratigraphic composition is divided into small pore throat matrix pores, connected bedrock pores, fracture pores, and mudstone. The total conductivity of the rock is established by the parallel combination of the effective components to establish the porous structure response equation, the equation is fitted by the rock electrical experimental data, and the parameters such as the fracture porosity index (mj) and the interconnected void porosity (ml) are calculated. The above method is applied to dolomite reservoir saturation interpretation and reservoir evaluation. The coefficient of correlation for the nonlinear regression model is 0.668. |
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| ISSN: | 1941-8264 1947-4253 |