| In - Depth Colloidal Dispersion Gels Improve Oil Recovery Efficiency |
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| 作者单位： | Daqing Petroleum Administrative Bureau，Daqing 163453 P. R. China |
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| 摘 要： | Princinple of colloidal dispersion gels technologyColloidal dispersion gels are made of low concentrations of POlymer and crosslinker. Polymer concentrations normally range from 100 to 1200 ppm.In this concentration range, there is not enoughpolymer to fo…
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In - Depth Colloidal Dispersion Gels Improve Oil Recovery Efficiency |
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| Authors: | Luo Jiangtao Yang Haibo Wu Tianhu and Xiao Long |
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| Abstract: | Daqing Oilfield has carried out the production of polymer flooding was promoted since in 1996. Presently, polymer flooding is very successful in several production plants of Daqing Oilfield, and getting into industrialization production. It has played a very important role in maintaining the oilfield stable production of over 50 million tons of oil. But the high permeability variation is serious, resulting in polymer production in some production wells recylingly and production concentration increasing slowly, which adversely affects polymer flooding efficiency. Chlloid dispersion gels (CDG) is a unique in - depth permeability modification process. It can reduce in - depth reservoir permeability variation by moving into highly permeable, water saturated zones and providing high resistance to subsequent water injection in those zones, so that oil can be produced from tighter rock. So CDG can enlarge volumetric sweep, and improve oil recovery efficiency. We had a CDG pilot programme in Daqing Oil Field in 1999, now this pilot has been entering into effective period with produing more oil and less water. Introduction |
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| Keywords: | Polymer flooding Colloid dispersion geis(CDG) Oil reco |
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