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Method and system for testing abrasiveness of rock

An abrasive and rock-based technology, applied in measuring devices, soil material testing, particle size analysis, etc., can solve problems such as difficulty in fully reflecting heterogeneous stratum rocks, lack of contrast in data, and difficulty in establishing a continuous section of abrasiveness in regional rocks.

Inactive Publication Date: 2012-10-17
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] These methods are all indoor experimental methods, and there are many problems, such as: ① The obtained results are difficult to reflect the high temperature and high pressure environment of the rock underground; ② It is difficult to fully reflect the change of rock properties in heterogeneous formations; The data measured in areas with large lithological changes may lack contrast; ④ It is difficult to establish a continuous section of abrasive rock in the area; ⑤ It costs a lot of manpower and money

Method used

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  • Method and system for testing abrasiveness of rock
  • Method and system for testing abrasiveness of rock

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no. 1 approach

[0086] Based on the above studies by the inventors, a method for measuring the abrasiveness of rocks has been proposed. The method may generally include the following steps: predetermine the relationship between the internal friction angle of the rock and the particle size fractal dimension of the rock; obtain a rock chip sample on site, and measure its particle size fractal dimension; And the above relational formula, determine the internal friction angle of the cuttings sample.

[0087] Refer below Figure 9 This method will be described in detail. In addition, in the following, duplicate descriptions will be omitted for parts that overlap with the above content.

[0088] First, in step S11, the relationship between the internal friction angle of the rock and the particle size fractal dimension of the rock is determined.

[0089] Specifically, a number of different rock samples are collected from a number of different locations, such as various types of rock samples from ...

no. 2 approach

[0115] The present invention can also be implemented as a method for determining the abrasiveness of rocks as follows. The method may include the following steps: obtaining a rock chip sample on site, and measuring its particle size fractal dimension; determining the The internal friction angle of this rock chip sample.

[0116] In this method, the predetermined relationship between the internal friction angle of the rock and the particle size fractal dimension of the rock can be obtained through the processing of the above step S11.

[0117] Other aspects of the method are the same as those of the above-mentioned first embodiment, so details are not repeated here.

[0118] According to the second embodiment, the same advantages as those of the first embodiment can be achieved. In addition, in the second embodiment, the relationship between the predetermined internal friction angle of the rock and the particle size fractal dimension of the rock can be obtained from others, s...

no. 3 approach

[0120] The present invention can also be implemented as a rock abrasiveness measurement system. Detailed description will be given below.

[0121] like Figure 10 As shown, the rock abrasiveness measurement system of this embodiment may include: a storage unit 21 , a particle size fractal dimension measurement unit 22 and a calculation unit 23 . In addition, an input unit 24 and an output unit 25 may be further included.

[0122] The storage unit 21 stores a predetermined relationship between the internal friction angle of the rock and the fractal dimension of the rock particle size. The relationship may be in the form of a formula, or in the form of a mapping table, and is not limited here. The predetermined relationship between the internal friction angle of the rock and the particle size fractal dimension of the rock can be obtained through the processing of step S11 in the above-mentioned first embodiment, and will not be repeated here.

[0123] The storage unit 21 can...

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Abstract

The invention provides a method and a system for testing the abrasiveness of rock. The method for testing the abrasiveness of the rock comprises the following steps of: predetermining a relation between an inner friction angle of the rock and a granularity fractal dimension of the rock; preparing a filed rock sample and testing the granularity fractal dimension of the field rock sample; and determining the inner friction angle of the field rock sample according to the tested granularity fractal dimension of the field rock sample and the predetermined relation. Therefore, the abrasiveness of the rock can be determined.

Description

technical field [0001] The invention relates to drilling technology, in particular to a method for evaluating rock abrasiveness. technical background [0002] In the fields of oil exploration, extraction, and the like, well drilling is widely performed. Drilling is the process of drilling into rock formations using a drill bit. During the drilling process, the drill bit becomes blunt due to the wear of the rock and needs to be replaced after a period of use. The abrasiveness of the rock is an important factor affecting the wear of the drill bit. Accurately grasping the abrasiveness of rock is of great significance for the selection of drill bits, parameter optimization and formulation of various technical measures in drilling engineering. [0003] The abrasiveness of the rock is the ability of the rock to wear away the material of the cutting edge of the drill bit. Existing methods for determining rock abrasiveness mainly include drilling and grinding methods, grinding m...

Claims

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Application Information

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IPC IPC(8): G01N33/24G01N15/02
Inventor 张辉高德利
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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