双河油田高耗水条带影响因素及治理对策可行性研究

doi:10.13809/j.cnki.cn32-1825/te.2020.06.015

Abstract

Abstract:

For the oilfields in east China with long-term water injection development, the water injection efficiency is gradually reduced due to the developed high water consumption strip in reservoir. In order to define the influence factors of development of the high water consumption strip, taking northern Shuanghe block in Nanyang as the research object, the influences of injection rate, permeability ratio, permeability variation coefficient and formation coefficient on the development of high water consumption strip have been analyzed respectively. Combined with orthogonal experiment, the relative influence level of the four factors is compared. The results show that high permeability, low injection rate, high permeability variation coefficient and high permeability ratio are more likely to cause the problems. With a certain formation coefficient and injection amount, high permeability is in major. Through the orthogonal test, the permeability variation coefficient influences most, followed by permeability ratio and formation coefficient, and the injection rate influences least. This study provides some reference for the adjustment in the later stage of oilfield production.

Key words: high water consumption strip, numerical simulation, orthogonal experiment, influencing factor analysis

CLC Number:

TE341

LIU Bo,ZHANG Rongda,ZHANG Yilin,LU Yunxia,WANG Ting. Influencing factors and countermeasures feasibility of high water consumption strip in Shuanghe Oilfield[J].Reservoir Evaluation and Development, 2020, 10(6): 96-102.

Figures/Tables 12

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References 15

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地质参数			流体参数
初始含油饱和度/%	平面渗透率/ 10^-3 μm²	原始地层压力/MPa	密度/ （kg·m^-3）		黏度/ （mPa·s）		体积系数/ （m³·m^-3）
初始含油饱和度/%	平面渗透率/ 10^-3 μm²	原始地层压力/MPa	油	水	油	水	油	水
71.5	673	14.7	869	1 000	8.2	1	0.988	1

组号	试验因素
组号	注入速度A	渗透率级差B	渗透率变异系数C	地层系数D
1	800	3	0.2	k×h
2	1 200	5	0.4	0.5k×2h
3	1 600	7	0.6	0.4k×2.5h
4	2 000	9	0.8	0.2k×5h

试验号	试验因素				采出程度/ %
试验号	A	B	C	D	采出程度/ %
1	800	3	0.2	k×h	45.87
2	800	5	0.4	0.5k×2h	43.24
3	800	7	0.6	0.4k×2.5h	41.26
4	800	9	0.8	0.2k×5h	40.59
5	1 200	3	0.4	0.4k×2.5h	49.81
6	1 200	5	0.2	0.2k×5h	48.64
7	1 200	7	0.8	k×h	41.28
8	1 200	9	0.6	0.5k×2h	42.86
9	1 600	3	0.4	0.2k×5h	49.37
10	1 600	5	0.8	0.4k×2.5h	47.92
11	1 600	7	0.2	0.5k×2h	48.26
12	1 600	9	0.6	k×h	39.57
13	2 000	3	0.8	0.5k×2h	45.65
14	2 000	5	0.4	k×h	42.25
15	2 000	7	0.6	0.2k×5h	45.56
16	2 000	9	0.2	0.4k×2.5h	46.28

计算参数	因素号
计算参数	A	B	C	D
K₁	170.96	189.70	190.05	168.97
K₂	181.59	183.05	176.18	180.01
K₃	186.12	176.36	169.25	183.27
K₄	179.74	169.30	175.44	186.16
m₁	42.74	47.425	47.5125	42.242 5
m₂	45.397 5	45.762 5	44.045	45.002 5
m₃	46.53	44.09	42.312 5	45.817 5
m₄	44.935	42.325	43.86	46.54
级差R	3.79	5.1	5.2	4.297 5
主次顺序	C>B>D>A

Influencing factors and countermeasures feasibility of high water consumption strip in Shuanghe Oilfield

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