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• W4236690546 abstract "DOWS (Downhole Oil-Water Separation) Cross-Waterflood Economics S.A. Jokhio; S.A. Jokhio Wood Group ESP, Inc. Search for other works by this author on: This Site Google Scholar M.R. Berry; M.R. Berry Wood Group ESP, Inc. Search for other works by this author on: This Site Google Scholar Y.K. Bangash Y.K. Bangash Wood Group ESP, Inc. Search for other works by this author on: This Site Google Scholar Paper presented at the SPE/DOE Improved Oil Recovery Symposium, Tulsa, Oklahoma, April 2002. Paper Number: SPE-75273-MS https://doi.org/10.2118/75273-MS Published: April 13 2002 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Jokhio, S.A., Berry, M.R., and Y.K. Bangash. DOWS (Downhole Oil-Water Separation) Cross-Waterflood Economics. Paper presented at the SPE/DOE Improved Oil Recovery Symposium, Tulsa, Oklahoma, April 2002. doi: https://doi.org/10.2118/75273-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 Improved Oil Recovery Conference Search Advanced Search AbstractDownhole oil-water separation (DOWS) provides the ability to conduct a cross-waterflood using a single wellbore that penetrates stacked waterflood zones. In this application of DOWS technology, production from one waterflooded zone is used as the inlet stream to the separation process. The oil-rich stream is produced to the surface while the water stream is injected into the second zone as shown in Fig.5.Potential benefits include reduced well count, reduced lifting costs, reduced expenditures for surface water handling facilities, reduced treating costs, smaller surface footprint and reduced environmental risk. Potential disadvantages include DOWS installation costs, more expensive workovers, more difficult and costly monitoring and larger wellbore requirements.DOWS technology is widely viewed as a potentially highly valuable technology with a high price tag and a high risk of failure. A major failure node for DOWS installation is the injection zone. Injection into a water flooded zone reduces the injectivity problems, and provides a benefit from the work required to inject the water stream. If a DOWS installation can economically be justified on its own merits anywhere, it will be in a cross-water flood application. The question remains; Can a DOWS cross-water flood be economically justified?This paper is divided in four parts. First, DOWS technology in general and cross-waterflood application in particular are briefly described. Second, the operational advantages and disadvantages of this application of DOWS technology are briefly discussed. Thirdly the parameters of economic model are reviewed in some detail. Lastly, the characteristics of a waterflood operation that can benefit economically from this technology are summarized.IntroductionMany oil producing wells in the world are completed in stacked reservoirs where multiple producing formations are encountered. Such zones some times are also heavily supported by nearby aquifers. With time these wells produce water quantities to a level where they have to be either artificially lifted or abandoned due to high water lifting, treating, handling, and disposal costs. Often these volumes are in tens of thousands of barrels a day, which require great deal of effort and equipment in handling them. Large investments are done in artificial lift deployment in such wells to unload them. Such investments are unattractive in a sense that they do not provide additional production instead they are done to lift the water.Many times such multiple zones are marginal producers and are either not produced or delayed for the production when economic conditions allow produce them. These zones like any other waterflood candidate, may be considered for water injection. The timing of the waterflood project may play a crucial role in the production of such zones economically. To be specific, when the major producing zone in such a stacked reservoir is considered for water flooding, the marginal zone that would otherwise be plugged may also be considered as a candidate at the same time with a fraction of additional cost. This may also reduce the extra rig and labor costs that otherwise would be applicable if the zones are considered for waterflooding at different times.Many areas are either prohibited to oilfield water production and disposal activities, or may not be preferred due to environmental concerns. Such areas may be considered for this kind of application. Keywords: separator, payout time, injection zone, application, installation, efficiency, discount rate 15, operation, separated water, waterflooding Subjects: Improved and Enhanced Recovery, Waterflooding This content is only available via PDF. 2002. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4236690546 title "DOWS (Downhole Oil-Water Separation) Cross-Waterflood Economics" @default.
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