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4.1.3 Indexes of heterogeneity of operational objects of deposit Uzen

In work as [42 one of the indexes characterising heterogeneity of horizons, is factors peschanistosti and raschlenennosti.

Statistical an index on factors peschanistosti and raschlenennosti are resulted in table 4.3

Table 4.3

Statistics of the basic properties of collectors

X Horizons Quantity

Chinks used

For definitions Factor peschanistosti Factor raschlenennosti

Compare znach Koeff.

var. Compare znach Koeff. var. 1 XIII 1151 0,34 0,66 5,6 0,1 2 XIV 594 0,55 0,75 8,2 0,32 3 XV 461 0,7 0,44 5,6 0,61 4 XVI 227 0,8 0,63 2,6 0,4 5 XVII 152 0,5 0,66 3,5 0,28 6 XVIII 100 0,66 0,72 5,8 0,98 J

4.1.4Fiziko-chemical properties and composition of the sheet

Liquids and gases Studying of physical and chemical properties of oil and gas has special value for knowledge not only processes of formation oil, deposits, but also the subsequent geochemical changes occurring in them

As a result of oxidising processes in a zone of water oil contact and tektogeneza, led to change of hypsometric position of deposits and a phase condition of hydrocarbons, etc. especially considerably change of physical and chemical properties neftej, in particular viscosity, density, quantity of gas in solution and saturation pressure, in large oil pools. These changes should be considered at drawing up of flow diagrammes and designs of working out of oil deposits. Still the big importance is got by studying of influence of forcing in ocean water layers, and also zakachka PEAHENS, solvents, an oil emulsion) physical and chemical properties of oil, gas and water, etc.

On the properties of oil at saturation pressure 8,0-11,0 MPa are malosernistymi, pitchy, with the maintenance of paraffin to 29 % that causes very much a heat of its congelation +32С. With centre viscosity in sheet conditions 3-4 mpa-with. Oil of these productive horizons differ from each other a little.

Unlike the majority neftej the deposits of Kazakhstan having in some cases the similar characteristic, sheet oil of deposit Uzen have essential feature consisting that saturation temperature of oil paraffin is practically equal to layer temperature. It demands the special approach to designing of working out of the deposit which basis is creation of the conditions excluding possibility of wax precipitation from oil in a layer, i.e. along with maintenance of sheet pressure it is necessary poderzhanie sheet temperature and it should be considered at working out designing.

In table 4.4 average values of parametres sheet neftej for each productive horizon of deposit Uzen in initial sheet conditions are resulted.

Characteristics Productive horizons

XIII XIV XV XVI XVII XVIII Center depth zaleganija, m 1050 1300 1350 1350 1420 1450 Center effective thickness, m 9,9 25,9 15 16,8 20,7 12,6 Center petrosated thickness, m 7,8 18 11,5 13,8 21,1 15,7 Center petrosaturation, % 63 64 61 63 63 57 Porosity, % 27 25 24 25 23 23 Sheet pressure, MPa 10,4 10,9 p, z 11,7 12,4 12,5 Rnas., MPa 7,2 7,8 8,0 8,2 8,3 9,2 Viscosity of sheet oil, mpas 4,2 3,6 3,4 3,5 3,7 3,5 Viscosity of petroleum crude, mpas 9,2 9,1 8,3 7,4 9,5 9,1 Density of sheet oil, kg/m3 of petroleum crude of 777 767 763 768 770 766 Density in reference conditions, kg/m3 884 853 852 855 859 852 Reference temperature of a layer, s 57,2 59,1 62,6 65 66,1 68 Gazosoderzhanie oil, m3/t 56 57,2 59,3 56,7 56,5 61,8 Temperature of occurrence of paraffin, s 57,0 60,5 58,5 - - 59,5 Maintenance in oil, % weight: Paraffin 24 29 28,4 19,5 23,5 16 are grey 0,17 0,13 0,16 0,19 0,24 0,2 o asphaltenes 1,64 1,0 1,28 3,58 2,52 - Resins silikagelevyh 13,4 12,8 14,8 15,8 - 14,7 Cokability 2,5 2,24 2,51 4,61 4,24 3,8 Basic characteristics oil zalaezhej

Arithmetic-mean values of density of oil change from horizon to horizon in small limits: from 763 to 777 kg/m3 (in sheet conditions) and from 852 to 884 kg/m3 (in superficial conditions). Change of density of oil on the area of a deposit the small.

Apparently from table 2.4 sheet oil of XIII horizon is characterised by higher viscosity (4,2 mpa-c) in comparison with viscosity neftej other horizons.

On the rests (XIV-XVIII) arithmetic-mean values of viscosity of oil in sheet conditions are close to horizons among themselves and make 3,43,7 mpas.

On all horizons the tendency of increase in viscosity of sheet oil in a direction from the arch to wings is observed.

One of the major factors affecting on size of saturation temperature of oil by paraffin, the maintenance in oil of the high-molecular hydrocarbons (paraffin) which quantity vpervonachalnyj for a deposit as a whole made the period of working out about 29 % is. The maintenance of asfaltovo-pitchy substances of order of 20 %. Set point of oil superficial conditions is equal 28 - 32С. That also is feature of deposit Uzen. This originality of oil causes the big complications at inside trade assembly of oil and its main transportation.

The cited data allow to classify oil of deposit Uzen as easy, highly paraffinaceous, pitchy and malosernistuju.

Componental composition of dissolved-gas is resulted in table 4.5.

Table 4.5

Componental petroleum composition on horizons

The maintenance of components, pier. % horizons X

And X

(N

And X

go

And About

~h and

1 N-butane i-pentane N-PENTANE Nitrogen Uglekisly j gas, % Gas density, g/l XIII 50,20 20,00 16,79 3,10 4,65 1,55 1,45 2,26 Traces 1,305 XIV 57,60 19,15 12,65 2,47 3,66 1,33 U2 2,02 - 1,206 XV 62,98 17,55 10,35 2,10 3,31 1,04 0,88 1,72 - 1,100 XVI 67,81 13,83 8,61 1,86 3,22 1,24 1,10 2,33 - 1,097 XVII 69,97 14,47 6,92 1,52 2,53 1,05 0,96 2,58 - 1,049 Apparently from table 4.5 the methane maintenance in gas naturally increases from XIII to XVII horizon. If in XIII horizon it averages 50 % it is equal in XVII horizon of 70 %.

Gas density as well as its chemical composition, changes with depth. It is possible to notice, that on such important parametres for working out as saturation pressure and viscosity, oil of deposit Uzen it is close to most often met neftjam.

On chemical composition sheet waters of deposit Uzen it is accurately divided on two groups: 1 group - water of cretaceous depositions, 2 group-jurskih depositions. Waters of cretaceous horizons concern basically to sulfatono-natrievomu to type with a mineralization to 10 g/l. Sheet waters jurskih productive horizons are presented monotonous on composition hlorkaltsievymi by pickles with a mineralization 130-170 g/l. Waters practically bessulfatnye with the industrial maintenance of bromine (to 500 ml/l), iod (to 20 mg/l) and other valuable components. The volume gas factor of waters does not exceed 0,5-0,9 m3/m3. The water-soluble gas is presented on 80-90 % by methane, on 4-8 % heavy hydrocarbons, on 3,2-13,5 % nitrogen and on 0,5-7,3%о carbonic gas. Serovodord is absent.

The physical properties of sheet waters defined for water with a mineralization 140 g/l, sheet pressure 11,4 MPa and temperature 62 With make: viscosity - 0,6 mpa-with, volume factor - 1,015, a compressibility factor - 32 MPa.

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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

More on topic 4.1.3 Indexes of heterogeneity of operational objects of deposit Uzen:

  1. 4.2 Condition of working out of XIII horizon of deposit Uzen
  2. CHAPTER 4 the SHORT GEOLOGO-PHYSICAL CHARACTERISTIC And the ANALYSIS of WORKING out of XIII HORIZON of DEPOSIT UZEN
  3. 2.6. Laboratory researches of possibility doizvlechenija micro-residual oil after zavodnenija for conditions of layers of XIII horizon of deposit Uzen
  4. 3.2 Acid composition "HIMEKO ТК-2" for increase in productivity of chinks nizkopronitsaemyh terrigennyh collectors of deposit Uzen
  5. Kozhabergenov Murat Mokanovich. the 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
  6. 4.1.2 Specification of key parametres of layers of operational objects
  7. 4.1 Short geologo-physical characteristic of a deposit
  8. ways of creation of heterogeneity
  9. 4.3.3 Analysis of efficiency of methods of influence on productive layers of the Uzensky deposit
  10. 2.3.1.1 Dynamics of market indexes
  11. classification of currency time series by average values of indexes Penga
  12. 1.2 Quantitative distribution of residual oil on the deposit area
  13. 1. A parity obespechitelnogo payment and the deposit
  14. graphic heterogeneity
  15. construction of function of heterogeneity
  16. yield Indexes
  17. morphological heterogeneity endotelija the person
  18. 3.4.2 Definition of factor of heterogeneity of a received mix.