Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs
According to the investigation argument between Chinese researchers and oversea scholars on threshold pressure gradient characteristics in ultra-low permeability reservoirs，with full diameter from Triassic outcrop by means of fully-automatic flooding system of AFS300TM provided by Core Lab in USA，an...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
2011
|
| Online Access: | http://hdl.handle.net/20.500.11937/39861 |
| _version_ | 1848755709652500480 |
|---|---|
| author | Xie, Sam He, S. Jiao, C. Zhu, H. Fu, C. Lei, G. |
| author_facet | Xie, Sam He, S. Jiao, C. Zhu, H. Fu, C. Lei, G. |
| author_sort | Xie, Sam |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | According to the investigation argument between Chinese researchers and oversea scholars on threshold pressure gradient characteristics in ultra-low permeability reservoirs，with full diameter from Triassic outcrop by means of fully-automatic flooding system of AFS300TM provided by Core Lab in USA，an unsteady approach to test the threshold pressure gradient of saturated and unsaturated flow in the ultra-low permeability cores is proposed. The threshold pressure gradient in the saturated and unsaturated flows are analyzed with the investigation on the pressure variation from downstream and upstream of the rock cores. The experimental results indicate that the threshold pressure gradient doesn′t exist in the ultra-low permeability rocks with saturated flow of normal brine and kerosene. And the capillary force caused in the interfaces of the fluids in the unsaturated flow is the basic reason of obvious threshold pressure gradient. Moreover，the dynamic effect of capillary pressure is observed in the unsteady state flow experiments from ultra-low permeability rocks. |
| first_indexed | 2025-11-14T09:00:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-39861 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:00:37Z |
| publishDate | 2011 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-398612017-01-30T14:37:49Z Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs Xie, Sam He, S. Jiao, C. Zhu, H. Fu, C. Lei, G. According to the investigation argument between Chinese researchers and oversea scholars on threshold pressure gradient characteristics in ultra-low permeability reservoirs，with full diameter from Triassic outcrop by means of fully-automatic flooding system of AFS300TM provided by Core Lab in USA，an unsteady approach to test the threshold pressure gradient of saturated and unsaturated flow in the ultra-low permeability cores is proposed. The threshold pressure gradient in the saturated and unsaturated flows are analyzed with the investigation on the pressure variation from downstream and upstream of the rock cores. The experimental results indicate that the threshold pressure gradient doesn′t exist in the ultra-low permeability rocks with saturated flow of normal brine and kerosene. And the capillary force caused in the interfaces of the fluids in the unsaturated flow is the basic reason of obvious threshold pressure gradient. Moreover，the dynamic effect of capillary pressure is observed in the unsteady state flow experiments from ultra-low permeability rocks. 2011 Journal Article http://hdl.handle.net/20.500.11937/39861 restricted |
| spellingShingle | Xie, Sam He, S. Jiao, C. Zhu, H. Fu, C. Lei, G. Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs |
| title | Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs |
| title_full | Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs |
| title_fullStr | Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs |
| title_full_unstemmed | Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs |
| title_short | Experimental Investigation of the Threshold Pressure Gradient on Saturated/Unsaturated Flow in the Ultra-low Permeability Reservoirs |
| title_sort | experimental investigation of the threshold pressure gradient on saturated/unsaturated flow in the ultra-low permeability reservoirs |
| url | http://hdl.handle.net/20.500.11937/39861 |