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Measurement method and device for properties of gel plugging agent in reservoirs

A technology of measuring device and measuring method, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of low test cost, inability to compare and analyze, short test time, etc., and achieve short test time, low implementation cost, The effect of reducing shear damage

Active Publication Date: 2015-06-03
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a method and device for measuring the performance of gel plugging agent in the reservoir, so as to realize the basic materials from the viscosity of weak gel to the elastoplasticity of strong gel in the process of plugging the channel of water channeling in the reservoir. Quantitative measurement and characterization of performance and plugging performance fundamentally solve the shortcomings of qualitative observation in previous gel tests and cannot be compared and analyzed under the same device and evaluation standard; and the test cost is low, the test time is short, the operation is simple and accurate Highly Reproducible and Repeatable

Method used

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  • Measurement method and device for properties of gel plugging agent in reservoirs
  • Measurement method and device for properties of gel plugging agent in reservoirs
  • Measurement method and device for properties of gel plugging agent in reservoirs

Examples

Experimental program
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Embodiment 1

[0048] Example 1, the repeatability test of the same kind of gel plugging strength

[0049] In a clean beaker, a number of subterranean polymer cross-linked gels are prepared, sampled with a sampler 2 and placed in the pore-throat simulator 1 having only the first lumen 11 and the second lumen 12, wherein the pore-throat simulator 1 is the first The diameters of the first lumen 11 (corresponding to the pore) and the second lumen 12 (corresponding to the throat) are 4 mm and 2 mm, respectively. After connecting the test device, turn on the pump and inject water at a rate of 1ml / min to push the gel to migrate in the pore throat simulator 1 to monitor the pressure dynamics. The highest pressure value is the breakthrough pressure of the gel, which represents the plugging strength of the gel to the pore throat, and the slope of the curve reflects the elastic properties of the gel material. The experiment was repeated four times under the same conditions, and the pressure dynamics ...

Embodiment 2

[0050] Embodiment 2, the analogy test of different gels

[0051] Three kinds of gels with different properties were configured, and the three kinds of gels with different properties were respectively placed in the pore-throat simulator 1 having only the first lumen 11 and the second lumen 12, and three experiments were carried out under the same conditions. The diameters of the first lumen 11 and the second lumen 12 of the pore-throat simulator 1 are 4 mm and 2 mm, respectively. After connecting the test device, turn on the pump and inject water at a rate of 1ml / min to test its breakthrough pressure. The results of three experiments show that the plugging strength measured by different gels is very consistent with its own properties, indicating that the test method is highly analogous and can measure the plugging characteristics of a series of gel systems with different properties from weak gels to strong gels , with the advantage of quantitative characterization. The test r...

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Abstract

The invention discloses a measurement method and device for the properties of a gel plugging agent in reservoirs. The measurement device comprises a pore throat simulator, wherein the pore throat simulator at least comprises a section of first pipe cavity and a section of second pipe cavity, and a diameter shrinkage part is formed in the connected position of the two pipe cavities. According to the measurement method, a relation curve of pressure and the volume deformation amount of a gel sample is obtained by means of the measurement device; gel elasticity is evaluated according to a linear section of the curve, and a pressure peak represents the plugging strength of the gel to a pore throat; a relation curve of pressure gradient and flow is measured in the second pipe cavity of the device, and the gel viscosity of weak gel is determined. According to the measurement method and device for the properties of the gel plugging agent in the reservoirs, the operation is simple and convenient, the testing time is short, the accuracy is high, the repeatability is good, a series of gel systems with different properties can be quantitatively measured under the same standard, and the analogy is high; and further, the problem of different measurement devices and evaluation standards for quantitatively measuring gel with different properties in the conventional gel testing is solved fundamentally.

Description

technical field [0001] The invention relates to a device and method for quantitatively measuring and characterizing the plugging properties of gel in porous media, in particular to a method and device for measuring the performance of gel plugging regulators in reservoirs. Background technique [0002] At present, most oilfields in China have entered the stage of high water cut, and the most important measure to deal with the rapid rise of water cut and severe water channeling and flooding is to implement profile control and water shutoff. As the most commonly used plugging agent, gel is widely used in major oil fields. Due to the different reservoir conditions of each oilfield, the performance of the gel plugging modifier required is also different. Therefore, it is very necessary to evaluate the basic parameters and performance indicators of gel in the reservoir, and it is also the basis for screening and developing gel plugging modifiers under corresponding reservoir cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
Inventor 岳湘安董利飞苏群秦巍宋伟新
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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