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Résumé
Well Bore Hydraulics in a SAGD Well Pair Swapan Kumar Das Swapan Kumar Das ConocoPhillips Co Search for other works by this author on: This Site Google Scholar Paper presented at the SPE International Thermal Operations and Heavy Oil Symposium, Calgary, Alberta, Canada, November 2005. Paper Number: SPE-97922-MS https://doi.org/10.2118/97922-MS Published: November 01 2005 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Das, Swapan Kumar. "Well Bore Hydraulics in a SAGD Well Pair." Paper presented at the SPE International Thermal Operations and Heavy Oil Symposium, Calgary, Alberta, Canada, November 2005. doi: https://doi.org/10.2118/97922-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE International Thermal Operations and Heavy Oil Symposium Search Advanced Search AbstractIn SAGD process a pair of horizontal wells is drilled at the base of a heavy oil and bitumen reservoir, vertically one above the other. Steam is injected into the upper well and the heated and mobilized bitumen drains to the bottom producer and is withdrawn either by natural lift or artificial lift. Uniform distribution of steam along the entire length of the well bore is very important for the uniform growth of the steam chamber. This is very important to make the entire length of the well productive.Pressure drop along the length of the injector and producer may cause steam break through in one segment and build up of liquid level between the wells. Generally steam is injected at the heel and the toe of the well and is distributed along the entire length primarily through slotted liner. It is expected that this will provide a higher quality steam at the toe end of the well. However, with out proper design the counter current heat transfer between the two streams may result in delivering a poor quality to the toe. In the producer it is necessary to withdraw fluid from the toe and heel. In a concentric design this may cause serious lifting problem if the tubulars are not designed properly and the split between the streams is not right. This paper presents the issues related to SAGD well bore design.IntroductionWell bore plays the second most important role in a SAGD operation, just next to the reservoir quality. The injector well bore needs to be large enough to deliver the injected steam uniformly along the length of the horizontal well bore. The producer well bore should be capable of draining all the fluids (reservoir deliverability) and efficiently produce it to the surface. It is most desirable to produce the fluids without any artificial lift. However, with the larger volume of production some form of artificial lifts may be necessary.Most of the commercial SAGD wells are expected to produce in the range of 600 - 1500 m3/d of total fluid under normal operating conditions after the initial ramp up period. The corresponding injector well should have the capacity of 400–1200 m3/d CWE (cold water equivalent) of steam injection. In addition to this requirement for the normal operating condition, these well bores should be suitable for handling the smaller volumes of fluids encountered during the circulation start up phase. Some times these start up volumes are an order of magnitude lower than the normal production rates. The production ramp up period ranges from 12 - 24 months period, where the injection and production rates go from a small volume to the normal operating range. Keywords: injection, surface pressure, flow rate, injector, liner, sagd, vertical section, circulation rate, producer well, pressure drop Subjects: Drilling Operations, Improved and Enhanced Recovery, Directional drilling, Thermal methods This content is only available via PDF. 2005. SPE/PS-CIM/CHOA International Thermal Operations and Heavy Oil Symposium You can access this article if you purchase or spend a download.
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| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
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| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
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| Études des sciences et des technologies | 0,000 | 0,000 |
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| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
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