8589356401

A.Isatayev, V. Bondarenko. RATIONAL CHOICE OF L1QU1DS FOR KILLING OF WELLS

65    70    75    80    85    90

Content of water phase

Fig. 1 - The dependence of the HEC break-down potential on the content of water phase Table 2 presents a composition and electrical stability of the HEC.

Studies of the thermal stability of the emulsion composition were conducted without calcium chloride presence at the temperaturę 80°C depending on the content of water phase and with the addition of calcium chloride. The studies show their aggregative stability in

formation conditions in comparison with the measurement of electrical stability during 1.5-3 days, depending on the content of the water phase (Table 3).

No.	Water phase,% of masses	Concentration of CaCb in water phase , % of masses	Break-down potential, B
1	70	20	63
2	75	20	75
3	75	40	45
4	80	0	92
5	80	10	76
6	80	20	74
7	80	30	71

Table 3 - Thermal stability of the emulsion compositions

Composition of return emulsion, %			Thermal stability at the 80°C, days
Water phase	Diesel fuel	Reactant- emulsifier
30	67	5	2,5
40	57	5	3
50	27	4	2
60	47	3	1,5
70	37	3	1,5
75	22	3	2
80	27	3	2
90	17	3	2.

Journal of Industrial Technology and Engineering, 2012, 2(3): 19 - 24

The addition into the emulsions composition of calcium chloride as a weighting agent showed that its content of morę than 5%

of masses not only increases the density but also the consistency of thermal stability of morę than 20 days (Table 4).