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Abstract
In this paper, the selective blocking ability of double crosslinking gel plugging agent was tested. The parallel core experiment was conducted by using the fractures with different permeability sizes in the chamber. We investigated the injection of gel in simulated fractures, the liquid distribution ratio, the breakthrough of pressure gradient, water plugging rate, oil plugging rate and erosion resistance with different size fractures. The selective plugging mechanism of double crosslinking gel plugging agent was analyzed.
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1 Daqing Fangxing Oilfield Development Co. Ltd, Daqing, Heilongjiang Province 163454, China
2 Research Institute of exploration and development of Daqing Oilfield Company Ltd, Daqing, Heilongjiang Province 163454, China
3 Daqing Oilfield Design Institute Co. Ltd., Daqing, Heilongjiang Province 163454, China
4 The Fifth oil production plant of Daqing Oilfield Company Ltd, Daqing, Heilongjiang Province 163454, China
5 Thermoelectric No.1 company, CNPC Electric Energy Co., Ltd, Daqing, Heilongjiang Province 163453, China