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• W4231757275 abstract "Implementing New Permeability Selective Water Shutoff Polymer Technology in Offshore, Gravel-Packed Wells M.A. Gruenenfelder; M.A. Gruenenfelder OFPG Inc. Search for other works by this author on: This Site Google Scholar Alain Zaitoun; Alain Zaitoun Inst. Francais du Petrole Search for other works by this author on: This Site Google Scholar Norbert Kohler Norbert Kohler Inst. Francais du Petrole 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 1994. Paper Number: SPE-27770-MS https://doi.org/10.2118/27770-MS Published: April 17 1994 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Gruenenfelder, M.A., Zaitoun, Alain, and Norbert Kohler. Implementing New Permeability Selective Water Shutoff Polymer Technology in Offshore, Gravel-Packed Wells. Paper presented at the SPE/DOE Improved Oil Recovery Symposium, Tulsa, Oklahoma, April 1994. doi: https://doi.org/10.2118/27770-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Improved Oil Recovery Conference Search Advanced Search SPE MembersAbstractA new polymer, previously evaluated in the laboratory, has been successfully tested to shut off water production in two offshore high temperature gravel packed wells in the Gulf Coast. The polymer is shear resistant, thus easy to handle, and, since it maintains good permeability to oil in the zones into which it is injected, it does not require zone isolation during injection into the well. After treatment, a strong reduction in WOR was observed in both wells. The effect lasted over 2 years in one well and for several months in the second well. These treatments show that the polymer is stable in field applications at 190 and 200 F (88 and 93 C).IntroductionIn many reservoirs, heterogeneity and bottom water coning are responsible for early water brealotluough, which reduces total oil recovery and increases operating costs. Over the years these mechanisms have been well documented. When two or more layers of differing permeability are producing together, production is naturally favored by the layers with the highest permeability. After oil has been produced from these layers, water encroachment occurs which hinders oil production from the lower permeability layers. Reservoirs with strong bottom water drive are subjected to breakthrough of this water which reduces the oil production as the water moves into the bottom of the perforated interval. Once the water reaches the perforations, it begins to move up further into the perforations rapidly. This type of mechanism, coning, has been well studied in the literature.Where possible, mechanical zone isolation, cement squeezes, or plugging type gels can be the easiest way to shut off the water corning from watered out layers. However, in many wells the oil and water producing zones are not separated or identifiable, or the completion of the well is not suitable for such workovers. In these cases the only way to reduce the permeability in the watered out zones is by the injection of a polymer or gel with the entire perforated interval open.In most cases this requires a polymer or gel that is a relative permeability modifier in order to reduce the risk of plugging the lower permeability oil saturated zones. These polymers and gels are known to selectively reduce the permeability to water relative to the oil permeability and they can be injected directly into a well without the expense of a major workover to pull the existing completion. The mechanisms of the polymer action are complex - non-Newtonian rheology, unsteady-state effects, adsorption, retention, wettability, etc. - and have been studied both theoretically and in laboratory experiments.The question of gel placement is a key factor for success of any gel system and it has been studied by Seright and co-workers. In practice, polymer and gel technology has been proven to be successful in many areas, thus focusing the interest of operators.P. 387^ Keywords: seright, permeability, relative permeability, water production, flow in porous media, production history, ppm, fluid dynamics, society of petroleum engineers, upstream oil & gas Subjects: Reservoir Fluid Dynamics, Improved and Enhanced Recovery, Flow in porous media This content is only available via PDF. 1994. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4231757275 title "Implementing New Permeability Selective Water Shutoff Polymer Technology in Offshore, Gravel-Packed Wells " @default.
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