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Improve the effect of high water cut of water flooding of reservoir engineering

:. , 0) of a 0,0) - Cl0) - C,) where c0) for the period fuel the profit increase, per} () for block profile prince Yu 3, plugging the design cost of the overall box prince Yu agent , Un I () for the cost of the construction work, Un} is a decision variable. Using this model, the South West courtyard oilfield block 3 'layer, Shengli Oilfield as three layers, etc. Dagang oil Tianzhou Qing Zhuang design experiments. The results showed that the amount of blocking agent to determine the nature and high permeability layers blocking agent type and experience on the field, Ji concluded that the experience should be based on empirical relationships derived. 4 improve performance evaluation method - improve performance should be considered for block up, on a block, the following conditions are valid. (1) increasing oil precipitation; (2) steady increase of oil in water, (3) stabilize oil precipitation. To this end, taking the full amount of potential in the dynamic data block basis. Curves with oil production and water drive curve to evaluate the South West of Chengdao oilfield block 3 'to illustrate an example layer. The block area 2kin *, reserves of 540 × 1O,, the average effective thickness of reservoir 6.6m, the depth of the central reservoir 1123m. The block was put into production in June 1976, June 1977 by nine area 500m spacing anti-Arab water injection wells, infill drilling in succession to the 1980,1985, daily oil production reached a peak, followed by declining production. 1987 block profile, started in 1991 to block a large channel-based, integrated governance (including the whole extract). . Collected in January 1986 ~ December 1991 received production data on the block, including the daily oil production (. 0), Nissan water (mouth w), cumulative oil production (Ⅳ.), The cumulative water production ( ,) the water cut (where). Table 5 gives the half-year by half a decline of 6 120 * data block production data. . Ⅳ - years (c / d) (m. / D) (I )()() 1986 - 062B'Ol1S6l ship ship l0l35 Bo ¨ 80.3l986 a l230 plate O1304. Il068ll3l59l92S81.2l987-0623 & 0128Oll32 delete 181899887l9 nail l2m0l5.0ll Debate 208938784.3l9 medullary vessels - 06 75 Chou Ol63 & Ol Ding love d3 basket basket 8I1988 - 12 Divination & 017 ● nOl193527656l688. ● 1989-06l6 & O1054.0l3l1411293846788.7l9 Zhao a l2 tablets n02: 82 arc Ol3537l6 Pao Wei Ji 489l99O a 0624 02701. Xiu Ju 370997491.6l9 birds Ol core 0 ∞ 0l a l2 Park 9 ∞ l41881o291.1l99l a 063. O'3】 71.0l twist delete delete a light 490-9_l991 l234L0339O15tl652B snake 4690.94.1 water drive curve Ⅳ. For the abscissa. The vertical axis on the number and draw the water displacement curves. Figure 4. We know from the theory of water displacement curves, from which water is a linear relationship between the start of; lgw, ~ A + BXN. 'Were obtained. 1987 and 1991 before and after plugging block to block large pore-based comprehensive treatment before and after, B value. Can be calculated and predicted oil recovery and increase the moisture content of the resultant increase in speed. Chengdong oil shutoff pilot area has gone through three stages. 1987 to the end of 1988 for overall profile I1989 to 1990 for the extension of the work on the stage. Profile in a few operations {Inoue for the year 1991, large pores were blocked. Work through these three stages, so that the maximum cumulative production test area Ⅳ. Continues to increase. Ultimate recovery increase. Displacement curves obtained from water results in Table 6.4.2,MBT schuhe preise, asked production decline curve as the abscissa. Daily oil production for the vertical axis, draw Ⅳ. / L prince Yu I crossed the line wrapped 6 waterflood displacement curve calculation assembled parameters commitment Ⅳ D-. - (104t) canthus (), l5 & 7.8 Phoenix before plugging Tan system anhydride paragraph 4 l8 & 6734.1 road closure extended phase 195.7136.2,1 223.96, IL4'7 system out of production decline curve, Figure 5. Can be exponential decline curve or double r song to fit the law of diminishing. Can be calculated on this basis that the validity of net production profile. . Considering the decline. Increase in cumulative production for the: r △ Ⅳ, = J. [FfJ a