Method for evaluating shale oil reservoir water self-absorption oil-displacement effect and oil-displacement time
The invention discloses a method for evaluating shale oil reservoir water self-absorption oil-displacement effect and oil-displacement time. The method comprises preparing simulated experimental formation water having a formation water mineralization degree, placing rock cores in saturated hydrogen...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a method for evaluating shale oil reservoir water self-absorption oil-displacement effect and oil-displacement time. The method comprises preparing simulated experimental formation water having a formation water mineralization degree, placing rock cores in saturated hydrogen nucleus-free fluorocarbon oil, detecting nuclear magnetic resonance T2 spectrums, carrying out statistics on an area formed through the nuclear magnetic resonance T2 spectrum and an X axis, carrying out a water self-absorption oil-displacement test on the rock cores, respectively standing the rock cores for different time periods, detecting nuclear magnetic resonance T2 spectrums, carrying out statistics on an area formed through the nuclear magnetic resonance T2 spectrum and the X axis, drawing the nuclear magnetic resonance T2 spectrums of the rock cores stood for different time periods on the same graph, calculating the difference of the areas formed through the nuclear magnetic resonance T2 spectrums in differe |
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