| 摘要 |
A method for preparing a plugging liquid for plugging of a zone of a subterranean formation around a bore hole, consisting of an emulsion comprising a continuous phase based on a hydrophobic liquid and a discontinuous phase based on a hydrophilic liquid, which emulsion contains an emulsifier, a polysaccharide and a cross-linking agent for said polysaccharide. The emulsifier and the cross-linking agent for the polysaccharide are introduced into and mixed with the hydrophobic liquid in any desired sequence, whereupon the hydrophilic liquid is introduced gradually into the prepared mixture under agitation, and the polysaccharide is then introduced, whereby a stable emulsion is obtained.
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