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3.3 Laboratory researches of efficiency of acid composition HIMEKO ТК-2

Results of laboratory research of influence of influence of an acid composition "HIMEKO ТК-2" on filtratsionno-capacitor properties of a collector of XIII horizon of deposit Uzen are more low resulted.

Experiment was made on filtration installation of high pressure HP-CFS with use of bulk model of a layer. The installation elementary diagramme is resulted above.

The porous medium of bulk model represented not ekstragirovannyj a milled core from chinks of 2352 XIII horizon of the Uzensky deposit. After saturation of model by water with a sheet mineralization have defined a permeability coefficient. Then after endurance of model at ambient temperature within 48 hours have iterated zakachku waters. After stabilisation of indexes, have again defined a permeability coefficient which has appeared in 2 times less initial. Permeability coefficient falling testifies to influence of inturgescence of a clay making porous medium on its filtratsionno-capacitor properties. For combined water creation through model under pressure 2,0 MPa zakachivalas petroleum crude of deposit Uzen.

At the subsequent replacement of oil by water at sheet temperature 60С value of factor of replacement has been fixed at level of 54 %. After endurance of model at ambient temperature within 15 hours zakachka waters it has been iterated with bolshej in the speed that has led to additional selection of oil. Thus the factor of replacement of oil has increased by 2 % and has reached 56 %. These data supplement data and confirm a conclusion about display of properties partially gidrofobizovannogo a collector which model is ground not ekstragirovannyj a core from hard currency. 6602.

In table 3.6 data about model, physical properties of liquids and kollektorskih properties of a layer are presented.

Table 3.6

Filtratsionno-capacitor properties of model of a collector and

Composition of an acid composition:

10 ml. neftenol NZ with fosfolom 3 ml. СаС12 32 %

87 ml. Sheet water (bg/l NaCl + 2g/l СаС12) the Investigated reagent:

1. Acid composition HIMEKO ТК-2 (the commodity form), diluted with concerning 1: 5 soft water.

2. Slurry viscosity ТК-2 at temperature 60С - 0,92 about experiment Stages:

Zakachka sheet water for the purpose of definition of initial permeability.

Endurance of the sample 24 hours for the purpose of revealing of inturgescence of a clay component in a core. A filtration of sheet water after endurance. Definition of permeability after inturgescence.

Zakachka the devolatilised oil of the Uzensky deposit at temperature t=60C and backpressure АР=2,4 MPa for combined water creation.

Replacement of oil by sheet water. Definition of factor of replacement КВЬ1Т.

Zakachka a buffer solution of solution NH4C1 of 3 % before pressure drop stabilisation. Permeability to phase definition on 3 % to solution NH4CI.

Endurance of model 24 hours with tsel^opredelenija stable value of permeability after contraction of clay.

Zakachka a dilute solution (1:5) an acid composition "Himeko ТК-2". A filtration of an acid composition before pressure stabilisation. Endurance of model 24 hour for the purpose of interaction of an acid composition with breed.

Zakachka 3 % of solution NH4C1. Endurance of model 24 hour. Definition of permeability and a permeability coefficient of restitution, the river of sheet water. Permeability and factor definition

Permeability reductions, the river On fig. 3.5 are resulted graphs of change of relative permeability of bulk model depending on relative zakachki waters.

Change of permeability of model concerning permeability to phase on water in the presence of residual oil (0,036 мкм2), taken over for unit (backpressure R "= 1,4 MPa, Temperature 60С)

9

7 8 9 10 11 12 13 14 15 16 17 18 19

The relative saved up volume zakachki, V, 1k/\/,

Fig. 3.5. Change of relative permeability of model in process zakachki a buffer liquid and after influence by a solution of the acid

Compositions HIMEKO ТК-2.

After replacement of oil by water zakachali buffer solution NH4C1. Then after endurance of model within 15 hours at ambient temperature have defined permeability to phase factor on a solution. Apparently from the resulted drawing the subsequent zakachka composition HIMEKO ТК-2 which has been diluted with with soft water in the relation 1:5, has led to sharp growth of permeability. Then again zakachali 3 % solution NH4C1 and after endurance of model within 15 hours, sheet water.

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A source: Kozhabergenov Murat Mokanovich. Substantiation of effective technologies doizvlechenija residual oil from obvodnennyh layers on an example of XIII horizon of deposit Uzen: Dis.... A Cand.Tech.Sci.: 25.00.17. - M: RGB, 2006. 2006

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