特高含水期油田新型水驱特征曲线公式推导

doi:10.11743/ogg20200616

Abstract

Abstract:

Many oil reservoirs stimulated by water flooding in China have entered the ultra-high water-cut stage.Using the relative permeability ratio versus water saturation curve in the performance prediction of these reservoirs often yields up-warping curves and misleading results.Based on a fitting analysis of the up-warping curves of different oilfields, this study obtained a new expression for the relationship between relative permeability ratio and water saturation.New equations were then deduced to characterize the performance of high water-cut reservoirs.Applications of the equations to oilfields verified their effectiveness in the production prediction of ultra-high water-cut reservoirs.

Key words: water flooding characteristic curve, curve fitting, ultra-high water-cut stage, water flooding development, recoverable reserve

CLC Number:

TE321

Yingsheng Wang, Chengfang Shi, Jiqiang Wang. New equations for characterizing water flooding in ultra-high water-cut oilfields[J]. Oil & Gas Geology, 2020, 41(6): 1282-1287.

Figures/Tables 8

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Table 1

Table 2

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Table 3

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Fig.5

References 21

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曲线	上翘后拟合表达式	相关系数
1	ln$\frac{{{K_{{\rm{rw}}}}}}{{{K_{{\rm{ro}}}}}}$=103.26S_wd^13.011	0.991
2	ln$\frac{{{K_{{\rm{rw}}}}}}{{{K_{{\rm{ro}}}}}}$=956.56S_wd^15.755	0.987
3	ln$\frac{{{K_{{\rm{rw}}}}}}{{{K_{{\rm{ro}}}}}}$=797.3S_wd^14.262	0.977
4	ln$\frac{{{K_{{\rm{rw}}}}}}{{{K_{{\rm{ro}}}}}}$=331.4S_wd^11.588	0.972
5	ln$\frac{{{K_{{\rm{rw}}}}}}{{{K_{{\rm{ro}}}}}}$=341.95S_wd^11.086	0.978
6	ln$\frac{{{K_{{\rm{rw}}}}}}{{{K_{{\rm{ro}}}}}}$=110.03S_wd^7.9074	0.988

累计产油量/(10⁴ t)	累计产水量/(10⁴ t)	含水率/%
36.130	38.770	54.51
45.021	52.912	63.99
55.974	77.770	75.19
66.874	119.046	80.89
78.487	168.082	81.42
91.075	224.639	79.23
112.748	323.435	86.70
132.585	487.499	92.32
145.495	629.021	90.18
156.473	696.680	86.27
167.028	785.458	91.78
175.297	862.522	90.77
178.489	904.996	92.05
182.054	961.163	95.12
185.704	1 030.860	94.77
189.535	1 100.029	94.42
193.759	1 171.939	94.69
196.686	1 230.038	95.29
202.072	1 358.356	96.33
205.934	1 480.184	96.96
208.895	1 606.369	97.71
211.897	1 711.787	96.99
216.829	1 930.118	98.17
218.969	2 045.629	98.25

地面累积产油量/(10⁴ t)	水油比WOR	含水率/%
34.168 7	1.39	58.14
36.178 6	1.65	62.33
37.741 9	1.92	65.78
39.081 8	2.45	70.99
40.198 5	2.45	71.04
42.655 0	3.24	76.41
44.218 3	3.24	76.44
45.781 6	3.77	79.03
48.461 5	4.30	81.12
50.694 7	4.62	82.22
53.374 6	4.83	82.84
55.607 9	4.84	82.87
57.394 5	5.63	84.91
59.627 7	5.37	84.31
62.307 6	6.16	86.04
63.647 6	6.69	86.99
65.210 9	7.22	87.83
66.327 5	7.48	88.21
67.890 8	8.01	88.90
69.454 0	9.06	90.06
70.124 0	10.37	91.20
71.687 3	11.15	91.77
72.803 9	12.20	92.42
73.920 6	13.51	93.11
75.483 8	15.08	93.78
76.153 8	16.12	94.16
77.270 4	17.43	94.57
77.940 4	19.00	95.00
78.833 7	20.05	95.25
79.503 7	21.88	95.63
79.950 3	23.18	95.86
80.843 6	24.75	96.12
79.503 7	26.32	96.34
79.950 3	27.88	96.54
80.843 6	29.97	96.77
81.290 3	32.06	96.98
81.736 9	33.63	97.11
82.183 6	35.46	97.26
82.406 9	36.76	97.35
82.406 9	38.33	97.46
82.630 2	40.15	97.57
83.076 9	42.24	97.69
83.076 9	43.81	97.77
83.300 2	45.89	97.87
83.746 0	47.98	97.96
83.970 2	49.55	98.02
84.193 5	51.37	98.09
84.193 5	52.94	98.15
84.416 8	55.03	98.22
84.640 0	56.85	98.27

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New equations for characterizing water flooding in ultra-high water-cut oilfields

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