AU705843B2 - Method and equipment for recording and processing digital images of drill cores - Google Patents
Method and equipment for recording and processing digital images of drill cores Download PDFInfo
- Publication number
- AU705843B2 AU705843B2 AU57060/96A AU5706096A AU705843B2 AU 705843 B2 AU705843 B2 AU 705843B2 AU 57060/96 A AU57060/96 A AU 57060/96A AU 5706096 A AU5706096 A AU 5706096A AU 705843 B2 AU705843 B2 AU 705843B2
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- Australia
- Prior art keywords
- light
- drill
- drill core
- recording
- images
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- Ceased
Links
- 238000000034 method Methods 0.000 title claims description 22
- 238000012545 processing Methods 0.000 title claims description 16
- 230000005855 radiation Effects 0.000 claims description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims 1
- 238000005286 illumination Methods 0.000 description 9
- 239000004576 sand Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000007619 statistical method Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000011496 digital image analysis Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Image Processing (AREA)
- Drilling And Boring (AREA)
Description
WO 96/35941 PCT/NO96/00108 1 Method and equipment for recording and processing digital images of drill cores The present invention concerns a method and equipment for recording and processing digital images of drill cores taken from subterranean geological formations. Recording and processing should here be understood as digital photographing and recording, together with handling, showing and statistical analysis of such images by means of suitable data equipment and software.
While performing drilling operations for oil and gas, there are frequent taken up samples such as drill cores from formations that may contain oil- and/or gas. The drill cores are subjected to different investigations to determine the petro-physical properties of the formations from which the cores are collected, that will say petro-physical properties related to porosity, permeability, grain size and grain size distribution, sand and clay relations, together with the quantification of main minerals in sand stone.
Previously it has been known to take ordinary colour pictures in scale 1:5, 1:4 and some times 1:2, of slabbed drill cores under the influence of visible and ultraviolet light.
To ease the handling of such pictures, that usually are taken in a large number of samples, they have been scanned by means of a hand scanner and stored in electronic data registers (digitalised).
Meanwhile, today there are no methods or techniques available that make use of the pictures or the stored data to calculate (predict) properties of drill cores. The disadvantage concerning such photographing and hand scanning is that the digitalised pictures made by a hand scanner are not of an unlimited length, and they are usually -2present in one fixed format (scale). In addition, the quality of film and developing process vary because commonly a plurality of service companies are involved in the handling drill cores. Different companies have different types of cameras, film qualities and illumination conditions. In addition, the picture quality deteriorates in course of time. Reprinting (making new reports) will lead to reduced picture quality. Further, digitalisation of pictures in this manual manner will in addition be dependent of: Equipment (scanner type/resolution) Picture quality (positive or negative) The format of the picture 1:4, 1:2) The quality of a hand scanned digital picture is therefore unsatisfactory for image analysis and prediction of petro-physical parameters. In addition, hand scanning 0000 015 represents one additional and work consuming intermediate step.
According to the present invention, there is provided a method and apparatus that may make it possible to predict petro-physical parameters of drill cores sampled while drilling for oil or gas, based upon digital image analysis.
According to one aspect of the present invention there is provided method for S recording and processing digital images of slabbed drill cores, wherein the images are recorded directly off the drill core by means of a high resolution, digital camera and the digital recorded data are transferred to a computer for further *D processing and storing, and wherein the digital camera is moved in equal intervals along the drill core and the drill core is illuminated by constant light at an angle with respect to the surface of the drill 0:00% core when the records are taken.
According to a further aspect of the present invention there is provided apparatus for recording and processing digital images of slabbed drill cores said apparatus including a framework with a table for fastening the slabbed drill core, a digital 4/ 4 MJP C:XWINWORD\MARIE\GABNODEL\57060C.DOC 2a camera, sources of light and a computer for automatic positioning of the camera, digitalisation, processing and storing of the digital data, wherein the digital camera is movably provided above the table in conjunction with an upper part of the framework, along the drill core together with the sources of light for constant radiation of light at an angle with respect to the drill core.
0 *0 S0 0000 0* 0 *0 0 0000 MJP C:\WINWORD\MARIE\GABNODEL\57060C.DOC WO 96/35941 PCT/NO96/00108 3 Meanwhile, until present it has been regarded as impossible to make use of the implicit information according to the invention because of its enormous complexity if a method for quantifying should be based upon a deductive model for generating light/shadow pattern out of physical "first principles". The invention is based upon the inverted problem definition. As the light/shadow pattern is characterised empirically, that will say this complicated 2-dimensional pattern is transformed to other forms of simpler 1-dimensional vectorial expressions being much easier to incorporate in statistical calibration techniques (PLS-multivariate calibration), it will now be possible to calibrate known petro-physical parameters from sand stones directly with these new implicit expressions. One central and critical factor of success for this composed method will be represented by a sequential application of traditional image analytic texture operators with new implemented methodology for characterising complex measuring sequences, AMT (Angle Measurement Technique). The AMT-method is described in the literature, but until present it has just been employed in geomorphologous works that differs totally from this new field of application, Formation Evaluation Workstation (FEW). The possibility of direct video image correlation and thereby Video based Petro-physical Parameter Predictor (VPPP) prediction facility of the FEW concept, is related directly to this innovative new combination of special illumination of the surface of the sand stone, texture derivation of the resulting light/shadow pattern, linearisation of the resulting texture image for AMT analysis, accompanied by a final empirical PLS multivariate calibration vis-a-vis laboratory measurements for the desired types of sand stone parameters.
In the following, the invention shall further be described by example with references to the drawings where: Fig. 1 shows a recording rig according to the invention for digital core images in a frontal view, Fig. 2 shows the same in a side view.
The recording rig according to the invention consists mainly as shown in Fig. 1 and 2 of a framework 1 with a table 2 for fastening a slabbed drill core 10, a movable position system 3, 4 including camera 9 and illumination 7, 8, together with an automatically control and operation system comprising a computer 6 and a control-/switch cabinet WO 96/35941 WO 9635941PCT/N096/00108 4 The framework 1 may advantageously be made out of aluminium profiles, but its dimensions must be sufficient to secure a stable and vibration free function. The table 2 is fixed to the framework 1 and is, as previously mentioned, adapted to fasten a slabbed drill core 10 at a distance that is constant with respect to the camera 9. It should be dimensioned lengthways to handle drill cores at minimum 3 meters.
The camera 9 is a high resolution digital video camera of the so called "frame capture" type and is arranged in a carriage 11 that is movably supported along a rail (not further shown) by means of a rail system (not shown either) in an upper frame part 3. The screw is driven by a step motor 4 that advantageously may have 200 steps in one revolution. If the screw is provided with a screw pitch of 5 millimetres per one revolution, this will give a movement ("linear resolution") of 0,025 millimetres per step.
The carriage is, in addition to the camera, provided with two day-light lamps 8 and two armatures for ultraviolet light 7 adapted for illuminating the core sample while recording the images. The illuminating sources are thereby moved together with the camera as the images are recorded. In this manner, the illuminating conditions are held constant along the drill core. It should be pointed out that each and one of the light sources 8 and the light sources 7 is arranged and controlled in such a manner that the drill core may be illuminated symmetrically or non-symmetrically at different angles of incidence of the incoming light. When recording images that just have the purpose to show the drill cores, symmetrical illumination at an angle of 20-600 will be employed. Images recorded for use in statistical analysis, are taken by the use of asymmetric illumination where the angle of incidence is 5-300, to achieve the best possible light-/shadow pattern while recording the images.
All functions are controlled by means of a computer (the PC) 6 that is provided with a program for positioning the camera, calibration, recording functions, data storage and image splicing etc. All electric components, such as relays, fuses and electric junctions, between the PC and the hardware part of the equipment (motor and illumination) are arranged in the switch cabinet The operation of the equipment is as follows; the carriage 11 together with the camera 9 and the illumination 7, 8 is moved along the rail in the above fixed frame part 3 in a WO 96/35941 PCT/N096/00108 stepwise manner, as the camera records one image a step of the drill core 11 fastened in the table 2 below.
The camera, that may have a resolution up to 4400 x 3400 points, records the images digitally and transfers them electronically through the cable 12 to the PC 6. A self-developed software for the PC, that will not be further described here, handles and synchronises the control of the motor together with operation of camera and light. On the basis of the data that are recorded in this manner with respect to the position of the camera and the illumination conditions, the images of the drill core are put together (spliced) electronically to a long image that, per se, together with records of plural core samples may represent the geological structure for a complete well. The composed images are stored in the PC and may be distributed/given to users/customers on hard disc, magnetic tape or optical discs.
In addition to the software for recording, processing and storing the digital images as mentioned above, it has been developed software for visualising images of drill cores on a data monitor, together with software for statistical analysis of digitalised images.
The software for monitoring images is a self-developed program used to show 24-bits digital core images on a data monitor. The program may handle images of both TIFFand BMP-format. The images may be spliced electronically and may be monitored as an unlimited, continuous image (for instance a complete well). Showing images in this manner is based upon a novel technique named segmented file-reading that is a method for fast visualising of digital images that extend beyond the place available. on the data monitor. Segments of images are read from file to memory-buffers by means of background processing. This type of loading is controlled on basis of the user's latest movements in the image. The method implies that in approximately 90% of the cases there will be a sufficient amount of image segments in the memory to cover the part of the image that the user wants to see. This results in a substantial faster visualisation of the images compared to ordinary methods based upon reading of data directly from file.
The program may in addition show data logs from file, depth correlated and scaled correctly, at the side of the digitalised image. The logs will be scaled automatically to the image as the image changes.
WO 96/35941 PCT/N096/00108 6 The program may operate in 4 modus: 1 image 3 logs 2 images 2 logs 3 images Zooming of one image in scale 4:1 and 8:1 As concerns the software for statistical analysis, due to the application of small-angle, asymmetric illumination of the drill cores, there is now possible to obtain a light-/shadow pattern in the images that by means of the software may be employed to calculate/predict: Averaged grain size and grain size distribution Porosity Permeability Main mineralogy Quantification of the properties will depend upon the reflection of visible light and/or that there will be originated a light/shadow pattern in a diagnostic and quantifying manner.
Claims (11)
1. Method for recording and processing digital images of slabbed drill cores, wherein the images are recorded directly off the drill core by means of a high resolution, digital camera and the digital recorded data are transferred to a computer for further processing and storing, and wherein the digital camera is moved in equal intervals along the drill core and the drill core is illuminated by constant light at an angle with respect to the surface of the drill core when the records are taken.
2. Method according to claim 1, characterised in that the drill core is illuminated by the use of white and ultraviolet light.
3. Method according to claim 1 or 2, characterised in that the drill core is S" 15 illuminated by asymmetrically provided light sources at an angle of incidence between 20-600.
4. Method according to claim 1 or 2, characterised in that the drill core is •illuminated by asymmetrically provided light sources at an angle of incidence between 5-100.
5. Apparatus for recording and processing digital images of slabbed drill cores said apparatus including a framework with a table for fastening the slabbed drill core, a digital camera, sources of light and a computer for automatic positioning of the camera, digitalisation, processing and storing of the digital data, wherein :se the digital camera is movably provided above the table in conjunction with an upper part of the framework, along the drill core together with the sources of light for constant radiation of light at an angle with respect to the drill core.
6. Apparatus according to claim 5, characterised in that the light sources comprise sources radiating white light and ultraviolet light. MJP C:WINWORD\MARIE\GABNODEL\57060C.DOC
7. Apparatus according to claim 6 characterised in that the white light has a Kelvin grade number greater than 3200.
8. Apparatus according to claim 5, characterised in that the camera and the light source(s) are arranged in a common carriage that is adapted for movements along rails arranged in the upper part of the framework.
9. Apparatus according to claim 8, characterised in that the carriage is movable by means of a screw driven by a stepmotor whereby said stepmotor is controlled by a computer.
Method for recording and processing digital images of drill cores substantially as herein described with reference to the accompanying drawings.
11. Apparatus for recording and processing digital images of drill cores substantially as herein described with reference to the accompanying drawings. 0 DATED: 15 March, 1999 PHILLIPS ORMONDE FITZPATRICK Attorneys for: NORSK HYDRO ASA 6. w0 0 MJP C:\WINWORD\MARIE\GABNODEL\57060C.DOC
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO951824A NO302433B1 (en) | 1995-05-09 | 1995-05-09 | Method and equipment for recording and processing digital images of cores |
NO951824 | 1995-05-09 | ||
PCT/NO1996/000108 WO1996035941A1 (en) | 1995-05-09 | 1996-05-03 | Method and equipment for recording and processing digital images of drill cores |
Publications (2)
Publication Number | Publication Date |
---|---|
AU5706096A AU5706096A (en) | 1996-11-29 |
AU705843B2 true AU705843B2 (en) | 1999-06-03 |
Family
ID=19898189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU57060/96A Ceased AU705843B2 (en) | 1995-05-09 | 1996-05-03 | Method and equipment for recording and processing digital images of drill cores |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0824685A1 (en) |
AU (1) | AU705843B2 (en) |
BR (1) | BR9608426A (en) |
CA (1) | CA2220344A1 (en) |
NO (1) | NO302433B1 (en) |
RU (1) | RU2201589C2 (en) |
WO (1) | WO1996035941A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100450152C (en) * | 2005-10-28 | 2009-01-07 | 中国水电顾问集团中南勘测设计研究院 | Geologic digital image eliting and recording system and its use method |
DE102010051861A1 (en) * | 2010-11-22 | 2012-05-24 | Tec-Corim Gmbh | Method for detecting cores |
CN102297832A (en) * | 2011-07-12 | 2011-12-28 | 长安大学 | Testing method for pavement concrete pore structure based on digital image technique |
RU2501046C1 (en) * | 2012-05-10 | 2013-12-10 | Ильнар Ильясович Хасанов | Mine rock core survey method |
CN104964978A (en) * | 2015-07-08 | 2015-10-07 | 大连理工大学 | Simulation method for base structure in soil body and movement visualization of soil body under earthquake action |
SE539697C2 (en) | 2016-03-05 | 2017-10-31 | Minalyze Ab | System and method for analyzing drill core samples. |
RU2667342C1 (en) * | 2017-12-29 | 2018-09-18 | федеральное государственное автономное образовательное учреждение высшего образования "Казанский (Приволжский) федеральный университет" (ФГАОУ ВО КФУ) | Device for recording and digital processing of images of drill cores |
CN108982320B (en) * | 2018-07-10 | 2021-03-02 | 中国海洋石油集团有限公司 | Method for calculating permeability of reservoir with complex pore structure by using particle size parameters |
CN111693428A (en) * | 2019-03-15 | 2020-09-22 | 中国石油化工股份有限公司 | Visual experimental device and method for measuring rock imbibition under stratum condition |
CN110018510B (en) * | 2019-04-28 | 2024-04-09 | 核工业北京地质研究院 | Uranium ore core beta-gamma automatic cataloging and image scanning device |
WO2021008638A1 (en) * | 2019-07-18 | 2021-01-21 | Ecopetrol S.A. | Interactive system for displaying objects on screens in real time and operating method thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0126492A2 (en) * | 1983-05-24 | 1984-11-28 | Automation Engineering, Inc. | Circuit board inspection apparatus and method |
EP0317650A1 (en) * | 1987-06-05 | 1989-05-31 | POPOV, Nikolai Pavlovich | Asynchronous motor |
EP0456217A2 (en) * | 1990-05-11 | 1991-11-13 | Orbot Systems, Limited | Optical inspection apparatus and illumination system particularly useful therein |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5083867A (en) * | 1988-11-28 | 1992-01-28 | Allegheny Ludlum Corporation | Slab surface contour monitor |
-
1995
- 1995-05-09 NO NO951824A patent/NO302433B1/en unknown
-
1996
- 1996-05-03 BR BR9608426A patent/BR9608426A/en not_active Application Discontinuation
- 1996-05-03 RU RU97120231/28A patent/RU2201589C2/en not_active IP Right Cessation
- 1996-05-03 AU AU57060/96A patent/AU705843B2/en not_active Ceased
- 1996-05-03 EP EP96915240A patent/EP0824685A1/en not_active Withdrawn
- 1996-05-03 CA CA 2220344 patent/CA2220344A1/en not_active Abandoned
- 1996-05-03 WO PCT/NO1996/000108 patent/WO1996035941A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0126492A2 (en) * | 1983-05-24 | 1984-11-28 | Automation Engineering, Inc. | Circuit board inspection apparatus and method |
EP0317650A1 (en) * | 1987-06-05 | 1989-05-31 | POPOV, Nikolai Pavlovich | Asynchronous motor |
EP0456217A2 (en) * | 1990-05-11 | 1991-11-13 | Orbot Systems, Limited | Optical inspection apparatus and illumination system particularly useful therein |
Also Published As
Publication number | Publication date |
---|---|
MX9708596A (en) | 1998-06-28 |
EP0824685A1 (en) | 1998-02-25 |
WO1996035941A1 (en) | 1996-11-14 |
RU2201589C2 (en) | 2003-03-27 |
NO951824L (en) | 1996-11-11 |
AU5706096A (en) | 1996-11-29 |
NO302433B1 (en) | 1998-03-02 |
BR9608426A (en) | 1999-06-15 |
CA2220344A1 (en) | 1996-11-14 |
NO951824D0 (en) | 1995-05-09 |
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