1 / 16

Three-Phase Measurements of Non-Wetting Phase Trapping Applied to Carbon Dioxide Storage

Three-Phase Measurements of Non-Wetting Phase Trapping Applied to Carbon Dioxide Storage. Saleh K Al-Mansoori, Stefan Iglauer, Christopher H Pentland, Martin J Blunt. Background. Three-Phase Flow in Literature:.

kennan
Download Presentation

Three-Phase Measurements of Non-Wetting Phase Trapping Applied to Carbon Dioxide Storage

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Three-Phase Measurements of Non-Wetting Phase Trapping Applied to Carbon Dioxide Storage Saleh K Al-Mansoori, Stefan Iglauer, Christopher H Pentland, Martin J Blunt

  2. Background Three-Phase Flow in Literature: • Studied extensively to measure the amount of residual gas saturation during reservoir displacements. • Suggested low oil saturations during gas displacement (oil layers). • Trapping experience: experimentally on water-wet consolidated media. • Pervious work: • a linked the reduction ofSor to Sgt, a = 0 – 1, (a = 0 oil-wet, 0.45 - 0.75 water-wet) • Showed:

  3. Motivation • Principal interest: gas and oil trapping by water with application to CO2 storage Unconsolidated media • Literature data for trapped gas saturation in consolidated systems.

  4. Motivation • Wide scatter in literature S(nw)i versus S(nw)r data. • Trapping Capacity = f S(nw)r

  5. Experimental Set Up • Wetting phase – Brine (5wt% NaCl; 1wt% KCl) • Non-wetting phase – n-octane and air • Oil and brine rate= 5 mL/min (Ncap=10-5, 2x10-5) • Air injection rate = drainage gravity (different amounts of time) • Saturated air with octane for 5 hours • Controlled evaporation using long, narrow tube

  6. Oil-gas-brine experiments - Experimental Procedure • Pack column with sand • Packing ratio used to give reproducible porosity • Fully saturate column with brine (vertically) • Fixed volume of brine and oil injected into the column (500 mL) • Air enters from the top, oil and gas drain from bottom (gravity drainage) • Column is left to drain for different amounts of time (17h, 2h, and 0.5h). • Column is sliced for Sgi/Soi or waterflooded to reach Sgr/Sor. • Column is sliced and sampled. Analysis of saturations in each section done with gas chromatography, GC & mass balance. • Thermal Conductivity Detector (TCD) allows water to be analysed • Sand is carefully recovered and washed with de-ionized water, dry mass of sand is measured, weighed and measured VB each empty clean column section. • Repeat (reproducibility)

  7. Experimental Results: gravity drainage: 17 hour Results: Saturation profiles Initials: Swi/Soi/Sgi saturation curves Residuals: Sw/Sor/Sgr saturation curves– post waterflooding

  8. Experimental Results: gravity drainage: 17 hour Results: Trapping curves • Sgr Vs. Sgi • Sor Vs. Soi • Sor Vs. Sgi • Sor Vs. Sgr • Sgt Vs. Snr • Snr Vs. Sni

  9. Experimental Results: gravity drainage: 2 hour Results: Results: Saturation profiles Initials: Swi/Soi/Sgi saturation curves Residuals: Sw/Sor/Sgr saturation curves– post waterflooding

  10. Experimental Results: gravity drainage: 2 hour Results: Results: Trapping curves • Sgr Vs. Sgi • Sor Vs. Soi • Sor Vs. Sgi • Sor Vs. Sgr • Sgt Vs. Snr • Snr Vs. Sni

  11. Experimental Results: gravity drainage: 0.5 hour Results: Saturation profiles Initials: Swi/Soi/Sgi saturation curves Residuals: Sw/Sor/Sgr saturation curves– post waterflooding

  12. Experimental Results: gravity drainage: 0.5 hour Results: Trapping curves • Sgr Vs. Sgi • Sor Vs. Soi • Sor Vs. Sgi • Sor Vs. Sgr • Sgt Vs. Snr • Snr Vs. Sni

  13. Experimental Results: experiments 1-3 Results: Trapping curves • Compiled Sgr vs. Sgi b. Compiled Sor vs. Soi

  14. Experimental Results – Comparison with Literature Data

  15. Discussion and conclusions For high initial gas saturation, more gas is trapped in the presence of oil than in two-phase flow. The trapped oil saturation, while no higher than the maximum reached in two-phase flow, is higher than expected for low initial saturations. Different from results in consolidated media. Why? In unconsolidated media, in two-phase flow, there is little snap-off and hence little trapping. In three-phase flow, oil layer collapse traps oil easily. Trapped oil prevents direct contact of gas by water except by snap-off and so we see more trapping. Confirm this? Pore-scale modelling; further experiment at reservoir conditions and with consolidated media.

  16. Acknowledgements • ADNOC • Shell-Imperial Grand Challenge on Clean Fossil Fuels Thank you!

More Related