Page 180 - Percolation Models for Transport in Porous Media With

10.3 RESULTS OF FIELD STUDIES 177

K
~

f/J 5 0 5 fflr,M
Figure 68: Distribution of the presented permeability factor near the well after
electric treatment

Q,M~

0.1/J

O,M~J-~~~~~~~
fl !4 2! +t l;,dag
Figure 69: Histogram for a typical dependence Q = f(T 0 ) for a well under
electric treatment

after electric treatment is presented in fig. 69. To is the duration of a unit cycle
of electric treatment.
The results of the electric treatment only weakly depend on the location of
the second electrode, since the resistance between the electrodes is a logarithm
function of the distance between them. The resistance Re and consequently, the
current supplied to the reservoir depend more significantly on the lengths of the
electrodes.
Thus the results of the field experiments show that the electric treatment of
wells is an ecologically pure, very effective, and efficient means of the well produc-
tion increase.
Electric treatment of wells with "high-density" currents can be used to increase
the production rates, purify the well filter, de-mud the critical zone of a well after
drilling.
To study the possibility of the pore space structure reconstruction in rocks
(underground leaching), an experiment on a fractured low-permeable ore strata in
Khodgent was conducted. The region is situated in the piedmont part of a crest
composed from granitoid rocks of several phases of magmatism. The most ancient
of these rocks, those dating back to the Upper Carboniferous, are represented
by the fine-grained leucocratic granites, the segments of a porphyritic structure.
Porphyr granites and aplite-like granites of the Lower Permian are examples of the
younger ones. The fractures are covered with attrition clay, quartz, or carbonate.