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A spatial reconstruction method of formation fractures based on core measurement

A technology of spatial reconstruction and core, applied in the field of description and formation fracture analysis, to achieve the effect of reducing human error, high precision, feasibility and practicability

Inactive Publication Date: 2015-09-30
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although surface shape is measured to micron accuracy, there are still cross-scale issues in this method

Method used

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  • A spatial reconstruction method of formation fractures based on core measurement
  • A spatial reconstruction method of formation fractures based on core measurement
  • A spatial reconstruction method of formation fractures based on core measurement

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Experimental program
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Embodiment

[0052] like figure 1 As shown in , a spatial reconstruction method of formation fractures based on core measurement, it includes the following steps:

[0053] S1. Select the experimental formation cylinder fractured core, such as figure 2 shown;

[0054] S2. Use the non-contact measurement system to scan and process the fractured core, after calibrating the non-contact measuring instrument, place the two sections of the selected fractured core on the same reference plane successively for measurement, and obtain the overall surface of the fracture Morphological surface plots, such as image 3 shown;

[0055] S3. Use 3D point cloud data reverse engineering software to process point data, and obtain the overall shape data of the scanned crack surface;

[0056] S4, export the data after measuring instrument scans in step S3, carry out denoising processing, and generate point cloud file, point cloud file is opened with TXT format, scan data is discrete point form, with (X, Y, ...

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Abstract

The invention discloses a formation fracture space reconstruction method based on rock core measure. The formation fracture space reconstruction method based on the rock core measure comprises the following steps: step 1 of selecting fracture rock core, step 2 of scanning and processing a fracture rock sample through non-contact type measure system and obtaining a surface chart, step 3 of acquiring form data through a three-dimensional point cloud data reverse engineering software, step 4 of exporting the form data, generating a point cloud file, step 5 of generating the point cloud file to a fracture space grid chart by using a matrix laboratory ( MATLAB), step 6 of drawing contour lines, step 7 of processing and generating a space height map, and step 8 of conducting necessary rotation and move to the space height map, and obtaining a reconstruction fracture space model. The formation fracture space reconstruction method based on the rock core measure has the advantages that the height of the reconstruction fracture space model acquired through reconstruction is the same as an actual fracture form, precision is improved significantly, feasibility and practicability are achieved, digital simulation research of mesomechanics can be well satisfied, and necessary reference for further research of reservoir network fracture plane, output volume prediction and pressure sensitivity test is served.

Description

technical field [0001] The invention relates to a method for analyzing and describing formation fractures in the field of oil and gas development, in particular to a method for spatial reconstruction of formation fractures based on core measurement. Background technique [0002] With the gradual deepening of oil and gas exploration and development, the proportion of fractured oil reservoirs and oil and gas reservoirs affected by fractures in the discovered oil and gas reserves is increasing, and the proportion of proven reserves and production is also gradually increasing. Research on reservoir fractures increasingly receiving attention. Fractures are a common feature of oil and gas reservoirs. During drilling and development, most reservoirs are affected by fractures. However, due to the deep burial of fractured reservoirs, the safety density window is narrow and the wellbore pressure fluctuates greatly during the drilling process, so problems such as coexistence of spilla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 李皋段慕白孟英峰魏纳刘佳洁赵强
Owner SOUTHWEST PETROLEUM UNIV
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