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Experimental Investigation of Polymer Type and Concentration on the Oil Recovery in Polymer Flooding Process
Bamzad, Vahid | 2010
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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 40870 (06)
- University: Sharif University of Technology
- Department: Chemical and Petroleum Engineering
- Advisor(s): Ramazani Saadatanadi, Ahmad; Masihi, Mohsen
- Abstract:
- Most of Iranian oil reservoirs, usually fractured carbonate, are in the end of primary or secondary recovery. Enhanced oil recovery methods are required for obtaining more performance from these resources. It seems to obtain more oil from reservoirs by flooding polymer after water flooding due to persistence of polymer effect, so the cost remain low. In this project, at the first the theory of water flooding and polymer flooding is described and after that we have done the following steps: •Injection of water into the plugs and calculate secondary recovery •Injection of polymer samples with 700 ppm concentration into the plugs •Injection of polymer samples with 1500 ppm concentration into the plugs num. 2 and 6 •Injection of polymer PAAM 30 with 700 ppm concentration into the plug num. 6 with 3 different rate of injection •Simultaneously injection of oil and water, also oil and polymer PAAM 30 with 700 ppm concentration with injection rate of 0.06 cc/min into the plug num. 6 for comparison of relative permeability diagrams of oil-water and polymer-oil •Plot recovery versus injected pore volume and pressure variation versus injected pore volume for all tests According to experiments results, water flooding attain more oil in plugs with less permeability. Also in polymer flooding process, polymers with hydrodynamic diameter greater than quarter of mean diameter of pore volume can’t inject into the plugs. If the injection is possible, with incretion of polymer concentration more oil will attained and the rate of polymer injection has a direct effect on the ultimate oil recovery.
- Keywords:
- Water Flooding ; Polymer Flooding ; Yeild ; Pressure ; Saturation Exponent ; Water Saturation ; Injection Rate ; Polymer Concentration ; Plug
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