Capillarity and rapid flow effects on gas condensate well tests
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| Natura: | Artículo científico |
| Lingua: | en |
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ECOPETROL S.A.
2006
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| _version_ | 1876430658560065536 |
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| author | Oscar-Fernando Muñoz |
| author_facet | Oscar-Fernando Muñoz |
| contents | Capillarity and rapid flow effects on gas condensate well tests Oscar-Fernando Muñoz Freddy-Humberto Escobar José-Humberto Cantillo Ingeniería nondarcy flow interfacial tension capillary phenomenon gas condensate reservoir The state-of-the-art of gas condensate well tests for pressures below the dewpoint are basically basedupon a two-zone composite radial model, which consists of a near-wellbore region having liquidcondensation and a monophasic flow zone with no gas condensate saturation.Information obtained from laboratory tests suggests the presence of three zones having different fluid mobilities:(1) a far region from the well with initial liquid condensate saturation of zero, (2) a near wellborezone having an increased condensate saturation and a reduced gas mobility, and (3) an intermediate zonefrom the well with both high capillary and increasing gas relative permeability which leads to gas mobilityrestoring due to condensate blocking. The gas condensate saturation is higher than its critical value, thenthe condensate phase is mobile.In this study, both the rapid flow and capillary number effects on gas condensate reservoirs from well pressuretest data are dealt with. We observed that the nondarcy effect originates additional pressure drop whichis proportional to the flow rate while, the capillary number causes a reduction of condensate saturation inthe near wellbore area and the reservoir providing a negative skin factor which contributes to fluid mobility,and therefore, production. Besides that, we also included the possitive coupled effect, defined here asthe simoultaneous action of nondarcy flow and capillary number; which is more relevant at relatively lowgas rates. We found out that the capillary number dominates the nondarcy effect leading to a reduction incondensate saturation 2006 artículo científico 0122-5383 https://www.redalyc.org/articulo.oa?id=46530205 en http://www.redalyc.org/revista.oa?id=465 CT&F Ciencia, Tecnología y Futuro application/pdf ECOPETROL S.A. CT&F Ciencia, Tecnología y Futuro (Colombia) Num.2 Vol.3 |
| format | Artículo científico |
| id | redalyc_46530205 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | ECOPETROL S.A. |
| spellingShingle | Capillarity and rapid flow effects on gas condensate well tests Oscar-Fernando Muñoz Ingeniería nondarcy flow interfacial tension capillary phenomenon gas condensate reservoir Capillarity and rapid flow effects on gas condensate well tests Oscar-Fernando Muñoz Freddy-Humberto Escobar José-Humberto Cantillo Ingeniería nondarcy flow interfacial tension capillary phenomenon gas condensate reservoir The state-of-the-art of gas condensate well tests for pressures below the dewpoint are basically basedupon a two-zone composite radial model, which consists of a near-wellbore region having liquidcondensation and a monophasic flow zone with no gas condensate saturation.Information obtained from laboratory tests suggests the presence of three zones having different fluid mobilities:(1) a far region from the well with initial liquid condensate saturation of zero, (2) a near wellborezone having an increased condensate saturation and a reduced gas mobility, and (3) an intermediate zonefrom the well with both high capillary and increasing gas relative permeability which leads to gas mobilityrestoring due to condensate blocking. The gas condensate saturation is higher than its critical value, thenthe condensate phase is mobile.In this study, both the rapid flow and capillary number effects on gas condensate reservoirs from well pressuretest data are dealt with. We observed that the nondarcy effect originates additional pressure drop whichis proportional to the flow rate while, the capillary number causes a reduction of condensate saturation inthe near wellbore area and the reservoir providing a negative skin factor which contributes to fluid mobility,and therefore, production. Besides that, we also included the possitive coupled effect, defined here asthe simoultaneous action of nondarcy flow and capillary number; which is more relevant at relatively lowgas rates. We found out that the capillary number dominates the nondarcy effect leading to a reduction incondensate saturation 2006 artículo científico 0122-5383 https://www.redalyc.org/articulo.oa?id=46530205 en http://www.redalyc.org/revista.oa?id=465 CT&F Ciencia, Tecnología y Futuro application/pdf ECOPETROL S.A. CT&F Ciencia, Tecnología y Futuro (Colombia) Num.2 Vol.3 |
| title | Capillarity and rapid flow effects on gas condensate well tests |
| topic | Ingeniería nondarcy flow interfacial tension capillary phenomenon gas condensate reservoir |
| url | https://www.redalyc.org/articulo.oa?id=46530205 |