分质工具中注入聚合物表观黏度变化数学模型的建立及应用

Abstract

Abstract:

Aiming at the low production level of the oil layer caused by the reservoirs with low permeability and the large contradiction between oil layers, we commonly use different medium injection tools in the oil fields to realize the match of polymer injection and polymer molecular weight to the oil layer. In order to reflect the effect of shearing on viscosity of polymer solution when it across the interstitial injection tools, a mathematical model about the impact on polymer apparent viscosity affected by shearing was established, and the influence of the structural parameters of interstitial injection tools and injection volume on the apparent viscosity of polymer was analyzed. The results showed that the apparent viscosity of the polymer solution went up when the length of contractile section, radius of cylindrical section, maximum diameter of dilated section and length of dilated section increased, while the apparent viscosity of polymer solution went down when the radius of the contractile section increased. And the length of cylindrical section had no effect on the apparent viscosity of polymer solution. The apparent viscosity of polymer solution decreased when the injection volume of the polymer solution increased. The calculation results can provide a theoretical reference for optimizing the structural parameters of the different medium injection tool.

Key words: polymer flooding, different medium injection tool, polymer molecular weight, apparent viscosity, shearing action

CLC Number:

TE357.6

Bin Huang,Xiaohui Li,Cheng Fu, et al. A mathematical model for the effect of shearing action on the apparent viscosity of polymer injected by a different medium injection tool[J]. Reservoir Evaluation and Development, 2018, 8(5): 48-55.

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References 20

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A mathematical model for the effect of shearing action on the apparent viscosity of polymer injected by a different medium injection tool

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序号	收缩段长度L₂/mm	收缩段半径R/mm	圆柱段半径d/ mm	圆柱段长度L₃/mm	扩张段最大直径D/ mm	扩张段长度L₄/mm	单井注入流量Q/ （m³·d^-1）
1	1	5	4	2	6	2	50
2	1	7.5	4	2	6	2	50
3	1	10	4	2	6	2	50
4	1	12.5	4	2	6	2	50
5	0.5	10	4	2	6	2	50
6	1	10	4	2	6	2	50
7	2	10	4	2	6	2	50
8	4	10	4	2	6	2	50
9	1	10	2	2	6	2	50
10	1	10	3	2	6	2	50
11	1	10	4	2	6	2	50
12	1	10	5	2	6	2	50
13	1	10	4	0.5	6	2	50
14	1	10	4	1	6	2	50
15	1	10	4	2	6	2	50
16	1	10	4	4	6	2	50
17	1	10	4	2	6	0.5	50
18	1	10	4	2	6	1	50
19	1	10	4	2	6	2	50
20	1	10	4	2	6	4	50
21	1	10	4	2	4.5	2	50
22	1	10	4	2	5	2	50
23	1	10	4	2	5.5	2	50
24	1	10	4	2	6	2	50
25	1	10	4	2	6	2	30
26	1	10	4	2	6	2	40
27	1	10	4	2	6	2	50
28	1	10	4	2	6	2	60

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