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4.3.1 Features of working out of XIII horizon

-*- Weighted mean-o - In a selection zone

-L - In a zone of forcing X Komp.otbora.zak, %

Mid-annual obvodnennost production-o - the Center gas factor

Fig. 4.2 Dynamics of sheet pressure on XIII horizon

Dynamics of sheet pressure on XIII horizon with 1987-2004г.г.

It is shown on fig. 4.2. On dynamics of sheet pressure on horizons the increase in sheet pressure in a forcing zone, in a selection zone, mid-annual obvodnennost production, the centre gas factor and accordingly the average sheet pressure in deposits of the basic arch of the Uzensky deposit is observed.

In table 4.8 the yielded workings out of XIII horizon for the first 10 years [43] are cited.

Table 4.8

The yielded workings out of XIII horizon for first ten years

Years It is finished on oil, thousand t. Obvodnennost

% Zakachka waters, thousand м3

Annual gain, %/year

Annual a gain, %/year 1965 67 0 0 0 0 1966 293 77,1 0 0 0 1967 646 54,6 0,3 0 0 1968 1040 37,9 0 94 0 1969 1248 16,7 0,2 416 77,4 1970 2069 39,7 0,9 944 55,9 1971 2290 9,7 2,3 3485 72,9 1972 2574 11,0 6,3 6246 44,2 1973 2929 12,1 10,7 7648 18,3 1974 3292 11,0 17,8 8683 11,9 1975 3715 11,4 24,3 9644 10,0

From the table it is visible, that the anhydrous period of extraction lasted 2 years. On the third year there was a water in a small amount, despite an essential gain of an annual oil recovery. On the fourth year has begun zakachka waters, but this year water occurrences it has not been fixed. The next years obvodnennost sluggishly accrued till 1970, and then rate of its growth increased. In 1975 the oil recovery has reached a maximum at constant decrease in annual rate of a gain. Thus obvodnennost made 24,3 %. Zakachka waters quickly grew and in 1976 has reached a maximum as it is visible from resulted below drawing.

Let's consider graphs of change of the basic indexes of working out XIII

The horizon, presented in drawing 4.3. It is visible, that changes annual

Oil recovery will be co-ordinated with respective alterations the annual

114 zakachki waters. But at the initial stage growth of annual extraction occurred only at the expense of increase in fund of chinks at insignificant obvodnennosti against falloff of diurnal extraction by one

Graphs of working out of XIII horizon of deposit Uzen

1965 1970 1975 1980 1985 1990 1995 2000 2005

Years

' the Annual oil recovery, thousand t/year Annual chakachka waters, mz/year-o - Annual extraction of a liquid t/year - "- the Daily average oil recovery, t/sut o Center obvodnennost on weight, % the-*-flowing factor of petroextraction, % ° Gas the factor mZ/mZ

Sheet pressure, MPa

Fig. 4.3. Graphs of working out of productive layers of XIII horizon of deposit Uzen

Chinks. We will notice, that last index reflects only sheet conditions. Characteristicly that this index after the period of sharp falling has started to increase since 1971 against growth zakachki waters. As soon as zakachka the beginnings sharply to decrease after maximum achievement in 1971 centre debit one chink also began to fall. Increase zakachki waters since 1980 has led to stabilisation not only daily average debita on oil, but also annual dob'chi to oil. During the period since 1987 on 1998 zakachka has dropped, fluctuating more than in 2 times. Apparently, during the same period of working out an annual oil recovery and daily average debit on oil also decreased. Since 1998 the increase in annual extraction and daily average debita against sharp growth zakachki waters has begun. Sharp growth obvodnennosti has begun since 1972 with backlog from growing zakachki waters approximately for 5 years. Then since 1980 obvodnennost fluctuated, remaining about centre size approximately 60 % ("shelf" was formed) up to 1995 then with fluctuations it has reached 74 %> in 2004

Thus, the analysis of graphs of working out of XIII horizon shows, that zakachka waters is the defining factor in change of the basic indexes. The increase or reduction zakachki result ins to corresponding increase or reduction of an annual oil recovery and a liquid, sheet pressure. Reacts and obvodnennost, but with shift in time and are observed sometimes opposite change of these indexes. The anhydrous period very short, obvodnennost constantly grows kolebatelno. The gas factor increased the first 5-8 years, and then has fallen and since 1985 remained to constants. And this falling of the gas factor coincides with growth of sheet pressure above initial on 1 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 4.3.1 Features of working out of XIII horizon:

  1. 4.2 Condition of working out of XIII horizon of deposit Uzen
  2. 4.3 Analysis of dynamics of indexes of working out of XIII horizon and work of chinks
  3. CHAPTER 4 the SHORT GEOLOGO-PHYSICAL CHARACTERISTIC And the ANALYSIS of WORKING out of XIII HORIZON of DEPOSIT UZEN
  4. 4.3.2 Features of behaviour of an oil recovery and obvodnennosti layer production on chinks of XIII horizon in comparison with chinks of the North Salymsky deposit
  5. 2.6. Laboratory researches of possibility doizvlechenija micro-residual oil after zavodnenija for conditions of layers of XIII horizon of deposit Uzen
  6. 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
  7. 1.3. Branch features of formation of a working capital
  8. the Thesis 2. Zolotorudnaja salinity is localised on the average horizon pattuma, concerns to nizkotemperaturnomu to hydrothermal type malosulfidnoj zolotokvartsevon formations. A deposit of the given type, despite formation conditions, are not zhilnymi and on structural features of localisation remind "stratiformnye" more likely.
  9. 1.2. Features of working out and adaptation of mechanisms of functioning ­ of the various branch integrated structures
  10. Cultural horizon ZB