Fast measurements of capillary pressure using the porous plate method: An alternative to MICP
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| Natura: | Recurso digital |
| Lingua: | inglese |
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Zenodo
2024
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| _version_ | 1866901996630441984 |
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| author | Lenormand, Roland Lenormand, Guillaume |
| author_facet | Lenormand, Roland Lenormand, Guillaume |
| contents | <p>The use of the porous plate method for the measurement of capillary pressure is time consuming, from weeks to months. In this paper we present an apparatus that reduces the duration of such measurements drastically while avoiding the use of toxic mercury. The main applications are the measurements of resistivity index by gas or oil injection, and drainage capillary pressure curves leading to the determination of pore throat size distribution (ptsd), as an alternative to mercury injection (MICP).<br>Our main improvement was to design an equipment allowing the use of very thin samples (3-6 mm) and the measurement of small effluent volumes. The use of 2 porous plates of the same wettability increases the speed of the production by a factor 2. Using a strong spring instead of a rubber sleeve improves the capillary contact and speed-up the mounting of the equipment. For quality control, the experiment is simulated with the two-phase flow simulator CYDAR to verify that the capillary equilibrium has been reached.<br>Instead of step injection, it is preferable to use injection with a continuous pressure increase to obtain a smooth Pc curve. With gas injection, capillary pressure curves up to 15 bar were obtained in one day on 6 mm disks with a large range of permeabilities, leading to ptsdt very close to MICP results. This apparatus can be a good alternative to MICP. Since it is fully automatic, less expensive, and easier to operate, several apparatuses can be run in parallel.<br>Compared to MICP, the main drawback is the limitation in pressure (15 bar with standard porous plates and air-water couple) leading to a minimum pore radius of ~0.05 micron. However, the measured values are in the domain of petroleum reservoir applications.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_16308325 |
| institution | Zenodo |
| language | eng |
| publishDate | 2024 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Fast measurements of capillary pressure using the porous plate method: An alternative to MICP Lenormand, Roland Lenormand, Guillaume 2024 SCA Alternate Oral <p>The use of the porous plate method for the measurement of capillary pressure is time consuming, from weeks to months. In this paper we present an apparatus that reduces the duration of such measurements drastically while avoiding the use of toxic mercury. The main applications are the measurements of resistivity index by gas or oil injection, and drainage capillary pressure curves leading to the determination of pore throat size distribution (ptsd), as an alternative to mercury injection (MICP).<br>Our main improvement was to design an equipment allowing the use of very thin samples (3-6 mm) and the measurement of small effluent volumes. The use of 2 porous plates of the same wettability increases the speed of the production by a factor 2. Using a strong spring instead of a rubber sleeve improves the capillary contact and speed-up the mounting of the equipment. For quality control, the experiment is simulated with the two-phase flow simulator CYDAR to verify that the capillary equilibrium has been reached.<br>Instead of step injection, it is preferable to use injection with a continuous pressure increase to obtain a smooth Pc curve. With gas injection, capillary pressure curves up to 15 bar were obtained in one day on 6 mm disks with a large range of permeabilities, leading to ptsdt very close to MICP results. This apparatus can be a good alternative to MICP. Since it is fully automatic, less expensive, and easier to operate, several apparatuses can be run in parallel.<br>Compared to MICP, the main drawback is the limitation in pressure (15 bar with standard porous plates and air-water couple) leading to a minimum pore radius of ~0.05 micron. However, the measured values are in the domain of petroleum reservoir applications.</p> |
| title | Fast measurements of capillary pressure using the porous plate method: An alternative to MICP |
| topic | 2024 SCA Alternate Oral |
| url | https://doi.org/10.5281/zenodo.16308325 |