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Method for determining microsphere plugging performance

A technology of plugging performance and microspheres, which is applied in the direction of measuring devices, suspension and porous material analysis, instruments, etc., can solve the problems of low efficiency and time-consuming, etc., and achieve simple and convenient simulation, long experiment cycle, and reduce experimental consumables cost effect

Inactive Publication Date: 2019-12-10
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core displacement test method takes a lot of time and is inefficient. The vacuum breakthrough method can only conduct qualitative analysis on the plugging capacity and the results have certain limitations.

Method used

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  • Method for determining microsphere plugging performance
  • Method for determining microsphere plugging performance
  • Method for determining microsphere plugging performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Experimental parameters: polymer microsphere type II (purchased from Gu'an Guokan Petroleum Technology Co., Ltd.) concentration 3000 mg / L, filter membrane pore size 600 mesh (converted to exactly 23 μm, consistent with reservoir conditions), filter membrane Density is 10 6 / cm 2 , the filtration time is 180min, and the microspheres with the hydration time of 0d, 3d, 7d, 14d and 21d are respectively filtered, and the obtained image 3 .

Embodiment 2

[0038] Polymer microsphere type I (purchased from Gu'an Guokan Petroleum Technology Co., Ltd.), select the same experimental conditions as polymer microsphere type I, and the experimental results are as follows figure 2 .

[0039] Table 1 The particle size parameters of polymer microspheres I and II

[0040] Types of Particle size (primary particle size) Particle size (hydration 20d) Polymer Microsphere I 300-1500nm 11μm-19μm Polymer Microsphere II 10~200nm 5μm-9μm

[0041] From figure 2 and image 3 It can be seen that at the same time, image 3 The quality of filtered polymer microsphere solution was significantly higher than figure 2 . The quality of the solution filtered out per minute, the more the quality of the filter membrane, the worse the blocking ability. The mass of liquid filtered out by polymer microsphere type II under the same hydration days and time is obviously greater than that of polymer microsphere I (it can als...

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PUM

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Abstract

The invention discloses a method for determining plugging performance. The method comprises the following steps: preparing a polymer microsphere solution; wetting a microfiltration membrane with deionized water; applying pressure to the polymer microsphere solution, so that the polymer microsphere solution passes through the microfiltration membrane, and recording the mass of the polymer microsphere solution passing through the microfiltration membrane. The method has the advantages that the detection speed is high; the matching performance of the microspheres and a porous medium is visually displayed; reservoir condition simulation is simple and convenient; the filter membrane can be reused for multiple times.

Description

technical field [0001] The present application relates to the field of petroleum, in particular to a method for measuring the plugging performance of microspheres. Background technique [0002] Polymer microsphere control and flooding technology has the characteristics of high construction success rate, remarkable effect of oil stabilization and water control, and long validity period. It is the main means of offshore oilfield control and flooding. The main reason for the remarkable effect of this technology is that after the microspheres go deep into the formation, they block the high-permeability channels to divert the liquid flow and activate the remaining oil in the reservoir to a greater extent. At present, there are many kinds of microspheres with different performances, and the plugging performance evaluation experiment cycle is long. Therefore, a method that can quickly and accurately measure the plugging performance of microspheres is needed. [0003] At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 鞠野李翔刘丰钢徐国瑞刘光普刘文辉庞长廷贾永康王冠华
Owner CHINA NAT OFFSHORE OIL CORP
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