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Cross-scale broad-spectrum particle size plugging formula granularity analysis method

A particle size analysis, cross-scale technology, applied in particle size analysis, particle and sedimentation analysis, analysis of materials, etc., can solve problems such as being unsuitable for large particle size plugging materials, and achieve the effect of improving accuracy

Active Publication Date: 2019-07-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the particle size analysis of plugging formula is generally carried out by laser particle size analyzer. However, the particle size range of laser particle size analyzer is below 1mm, which is not suitable for plugging materials with large particle size.
Therefore, there are large limitations

Method used

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  • Cross-scale broad-spectrum particle size plugging formula granularity analysis method
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  • Cross-scale broad-spectrum particle size plugging formula granularity analysis method

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Embodiment 1

[0038] The composition and dosage of granular plugging materials in the plugging formula are as follows: 3%A 1 +1%A 2 +3%A 3 +3%A 4

[0039] Granular plugging material A1, the mass volume ratio addition is 3% (3g / 100ml), converted into volume ratio addition is 3% / ρ A1 .

[0040] Granular plugging material A2, the mass volume ratio addition is 1% (1g / 100ml), converted into volume ratio addition is 1% / ρ A2 .

[0041] Granular plugging material A3, the mass volume ratio addition is 3% (3g / 100ml), converted into volume ratio addition is 3% / ρ A3 .

[0042] Granular plugging material A4, the mass volume ratio addition is 3% (3g / 100ml), converted into volume ratio addition is 3% / ρ A4 .

[0043] A cross-scale broad-spectrum particle size plugging formula particle size analysis method, the specific implementation steps are as follows:

[0044] 1. Classify the granular plugging materials in the plugging formula according to their size, A 4 micron scale, A 2 、A 3 mm and A 1...

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Abstract

The invention discloses a cross-scale broad-spectrum particle size plugging formula granularity analysis method, and relates to the field of plugging formula granularity analysis of well completion engineering in well drilling. The method disclosed by the invention comprises the following steps: performing size classification on plugging materials in a plugging formula, obtaining the granularity distribution of granular plugging materials by using a laser granularity analysis method and an imaging granularity analysis method according to the size difference, and performing weighted summation according to the granularity intervals and adding amounts of the granular plugging materials to obtain the granularity distribution of the plugging formula. By adoption of the cross-scale broad-spectrum particle size plugging formula granularity analysis method disclosed by the invention, the problem that the granularity distribution of the plugging formula across multiple scale ranges cannot be effectively obtained is solved, granularity analysis can be performed on the broad-spectrum particle size plugging formulas spanning the micrometer, millimeter, centimeter and above scales, thereby effectively evaluating the crack plugging capability of the plugging formula and providing a reference for researchers to optimize the plugging formula.

Description

technical field [0001] The invention relates to the field of particle size analysis of plugging formulations in drilling and completion engineering, in particular to a particle size analysis method for plugging formulations with cross-scale and broad-spectrum particle sizes. Background technique [0002] The matching relationship between the particle size distribution of the plugging formula and the fracture width directly affects the plugging pressure bearing capacity and plugging efficiency of fractured formations. In order to achieve the optimal filling effect, it is necessary for the plugging material to closely cooperate with particles of different sizes when forming a bridge plugging plugging, and different types of materials such as rigidity, resilience, and fibrous materials cooperate with each other to improve the formation efficiency and pressure bearing capacity of the plugging layer. , more effectively protect the reservoir from the erosion and harm of working fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/0205G01N15/0227G01N2015/0046G01N2015/1029G01N15/1433
Inventor 许成元张敬逸康毅力游利军闫霄鹏姜超周贺翔杨斌刘川
Owner SOUTHWEST PETROLEUM UNIV