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Test method for compressive strength of rigid leakage plugging materials

A technology of rigid plugging and compressive strength, applied in the direction of applying stable tension/pressure to test material strength, analyzing materials, strength characteristics, etc., can solve problems such as quantitative measurement of compressive strength of materials that cannot be rigidly plugged, and achieve judgment Scientific process, strong operability, reliable and accurate data

Active Publication Date: 2022-03-08
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these methods can quantitatively measure the compressive strength of rigid leakage plugging materials.

Method used

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  • Test method for compressive strength of rigid leakage plugging materials
  • Test method for compressive strength of rigid leakage plugging materials
  • Test method for compressive strength of rigid leakage plugging materials

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In this example, rigid calcium carbonate particle experimental material, which is a rigid plugging material commonly used in oil and gas reservoirs, is selected. First, the following steps are required to determine its optimal loading displacement:

[0035] A, select many grains of rigid calcium carbonate particles at random, and divide it into groups, determine the particle size distribution and average equivalent diameter of each group of rigid calcium carbonate particles by graphical analysis method,

[0036] b. Select one group of rigid calcium carbonate particles and put them on the panel of the pressurized instrument, load them at a constant speed of 0.2mm / min, the loading displacement is 1 / 10 of the average equivalent diameter, and test the rigidity after pressurization by graphic analysis Calcium carbonate particle size distribution, and calculation of D90 degradation rate of rigid calcium carbonate particles before and after pressurization,

[0037] c. The inve...

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Abstract

The present invention relates to a method for testing the compressive strength of rigid leak-stopping materials and its application, and belongs to the technical field of drilling leak-stopping materials. The cross-sectional area Si and equivalent diameter Di (i=1~X) of each grain of rigid leakage plugging material; 3. The rigid leakage plugging material in step 1 is tested for compressive strength, and its maximum is tested according to D90 degradation rate. Optimum loading displacement; repeat the above operations until all the tests of the X grains of rigid plugging materials in step 1 are completed; 4. According to the aforementioned test results, calculate the arithmetic mean value to obtain the compressive strength of the rigid plugging materials. This method repeats the test many times to eliminate the error caused by the test material itself. The method can determine the compressive strength of the rigid plugging material, has strong operability, and the data is reliable and accurate, and the optimal loading displacement can be judged according to its D90 degradation rate, making the judgment process more scientific and reliable.

Description

technical field [0001] The invention belongs to the technical field of drilling plugging materials, in particular to a method for testing the compressive strength of rigid plugging materials. Background technique [0002] Lost circulation refers to the phenomenon that drilling fluid or other working fluid fluid in the wellbore leaks into the formation pores and fracture spaces under the pressure difference during various downhole operations such as drilling, cementing, testing or well repairing, which will lead to various Engineering problems bring great difficulties to the exploration and development of oil and gas resources. Therefore, it is necessary to improve the leakage prevention and plugging ability of drilling fluid for formations prone to leakage. At present, bridging plugging materials are generally used to enter the formation loss channel, and under the action of pressure, temperature or chemical reaction, the plugging layer with certain mechanical strength is f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0019
Inventor 康毅力郭昆许成元游利军李潮金杨斌张洪琳杨杏林
Owner SOUTHWEST PETROLEUM UNIV
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