Experimental method for testing slow expansion performance in polymer microsphere rock core

A technology for testing experiments and experimental methods, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as serious retention effects, and achieve the effects of eliminating "bridge blocking" effects, reliable experimental data, and simple experimental operations

Inactive Publication Date: 2017-11-28
NORTHEAST GASOLINEEUM UNIV +1
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AI Technical Summary

Problems solved by technology

In addition, during the process of micro-injection of polymer into the core, the ball tends to form a "bridge plug" stagnation effect on the end face of the core, especially at a lower injection rate.

Method used

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  • Experimental method for testing slow expansion performance in polymer microsphere rock core
  • Experimental method for testing slow expansion performance in polymer microsphere rock core
  • Experimental method for testing slow expansion performance in polymer microsphere rock core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] 1. Experimental conditions

[0029] 1. Medicine and oil and water

[0030] The experimental reagents include 3 kinds of micron-sized polymer microspheres (including polymer microspheres provided by Bohai Oilfield, with an effective content of 100%, code-named "B"; CNOOC Research Institute's polymer microspheres, with an effective content of 100%, code-named "B") Y" and laboratory-made polymer microspheres, with an effective content of 100%, code-named "D").

[0031] The experimental water is simulated injection water in LD10-1 oilfield, and its ion composition is shown in Table 1. Use source water to prepare mother liquor, and dilute to the target concentration with mixed water (mixed water is source water: sewage = 1:1).

[0032] 2. Core

[0033] The experimental core is a quartz sand epoxy resin cemented artificial homogeneous core, the appearance geometric size: width × height × length = 4.5cm × 4.5cm × 60cm, the gas permeability is K g =2000×10 -3 μm 2 .

[0...

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Abstract

The invention belongs to the technical field of petroleum reservoir exploitation, and in particular relates to an experimental method for testing the slow expansion performance in a polymer microsphere rock core. The method comprises the following steps: 1, making an artificial rock core: adopting a quartz sand epoxy resin bonding method to make the artificial homogeneous rock core; 2, pumping out the saturated water of the rock core: measuring the actual outline dimension of the rock core, calculating the overall volume of the rock core, weighing dry weight, pumping out the saturated water, weighing wet weight, and calculating the volume of the saturated water and the porosity; 3, calculating the water permeability of the rock core: establishing a relation curve of injection pressure difference and injection speed, and calculating the water permeability; 4, testing the slow expansion effect of polymer microspheres; 5, evaluating the slow expansion capacity of the polymer microspheres: finding out that the injection speed 0.3mL/min or 0.5mL/min corresponds to the injection pressure difference delta P0 on the water driving relation curve of injection pressure difference and injection speed established in the step 3, and calculating microsphere blocking rates at different moments.

Description

Technical field: [0001] The invention belongs to the technical field of oil reservoir development, and in particular relates to an experimental method for testing the retarding expansion performance in a polymer microsphere rock core. Background technique: [0002] At present, the production of major domestic oilfields has entered the stage of medium-high water cut development, and profile control, water plugging and chemical flooding have become one of the important technical means for oilfields to enhance oil recovery. In recent years, polymer microspheres have been highly valued by oilfield development workers and scientists for their unique seepage characteristics, excellent liquid flow diversion effect and simple injection process. Compared with the field test and application scale of polymer microspheres, the laboratory research of microspheres started relatively late, and the existing experimental methods still mainly use the performance evaluation method of polymer s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
Inventor 卢祥国刘义刚曹伟佳张云宝刘进祥谢坤金玉宝闫冬
Owner NORTHEAST GASOLINEEUM UNIV
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