19-02-2014 дата публикации
Номер: CN103590803A
Принадлежит:
The invention relates to a solid acid fracturing method. The solid acid fracturing method comprises the steps of first using non-reactive aqueous viscous liquid to press a target layer open, pumping the aqueous viscous liquid where water-insoluble solid acid powder or particles are suspended, then pumping acid fluid, and finally replacing a production layer with the acid fluid. The mass concentration of the water-insoluble solid acid powder or particles is 3-40%, and the grain size of the solid acid powder or particles is selected from 5-500 mesh; and the non-reactive aqueous viscous liquid is natural polymer, modified vegetable gum, artificially synthesized polymer or thickened aqueous solution of the mixture of the natural polymer, the modified vegetable gum and the artificially synthesized polymer. The method is suitable for deep well acidizing fracturing operation of a crack type or dissolution pore type carbonate reservoir with the stratum temperature of 120-180 DEG C, leak-off of ...
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