V.V. Belkin

Open joint-stock company "Uralkalii"

Patent office, JSC "Uralkalii", 63 ul. Pyatiletki, Berezniki, Perm region 618426; attn: G.I. Mikhailova

METHOD TO CONTROL THE STATE OF STRESS OF A SEISMIC AREA,

including injection of fluid in deep aquifers occurring at a depth of about 2 kms in seismic areas. The proposed new method differs in that as injected fluid they use specially prepared excess potash production brines and calcium chlorine soda production sewage, and after the beginning of injection they conduct regular measuring of the formation pressure and register earth tremors. Immediately after the tremors of 1 to 2 Richter scale numbers are induced, the pressure at the well head is gradually lowered until the tremors cease. Then the pressure at the well head is again increased until tremors appear, and so on.

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