CN104181089A - Equipment for scanning facial porosity of rock and method thereof - Google Patents
Equipment for scanning facial porosity of rock and method thereof Download PDFInfo
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- CN104181089A CN104181089A CN201310192414.4A CN201310192414A CN104181089A CN 104181089 A CN104181089 A CN 104181089A CN 201310192414 A CN201310192414 A CN 201310192414A CN 104181089 A CN104181089 A CN 104181089A
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Abstract
The invention puts forward equipment for scanning facial porosity of rock and belongs to the field of chronology. Pores of rock are filled with a fluorescent material. The equipment comprises an object stage, an objective lens, a polariscope, a focusing lens, a laser scanning unit, a fluorescence incident pore-plate, a photoelectric signal amplifier and a control processing unit. The object stage can move up and down along the vertical direction. The objective lens, the polariscope and the focusing lens are successively arranged from bottom to top above the object stage. The laser scanning unit is arranged at one side of the polariscope and can move. The fluorescence incident pore-plate and the photoelectric signal amplifier are successively arranged from bottom to top above the focusing lens. The photoelectric signal amplifier can receive a fluorescence signal from a laser-activated fluorescent material and convert the fluorescence signal to an electrical signal. The control processing unit can control up-down movement of the object stage, control operation of the laser scanning unit and receive and process the electrical signal from the photoelectric signal amplifier. The invention also puts forward a corresponding method. According to the equipment and the method, facial porosity of rock can be observed accurately and conveniently.
Description
Technical field
The present invention relates to a kind ofly for scanning the equipment of rock face porosity, belong to field of oil drilling.The invention still further relates to a kind of for scanning the method for rock face porosity.
Background technology
In the prior art, in the time of test rock face porosity, conventionally adopt ordinary optical microscope to observe petrographic thin section, then by general camera imaging or macroscopic mode, within the scope of defined area, determine the area of hole, then through calculating the face rate of observation rock sample.
The result that this method obtains is subject to instrument and people's impact, and error is larger; Meanwhile, the mensuration of the pore throat characteristic parameter in rock reservoir can only adopt the mode of indirect measurement to carry out, and cannot obtain real pore throat characteristic parameter in rock.
Summary of the invention
The object of the invention is to solve existing rock face porosity measuring error greatly and cannot obtain the problem of real pore throat characteristic parameter in rock.The invention provides equipment and relevant method.
In order to realize object of the present invention, the present invention proposes a kind of equipment that is exclusively used in rock specimens observation, this equipment utilization LASER Light Source excites the fluorescent material that is placed in rock interior hole, by making the confocal in rock sample inside of the object lens of this equipment and convergent lens, realize the blur-free imaging of rock sample internal point; By the flat scanning of design LASER Light Source, can complete the complete image in the inner section of rock sample, view data is through the processing of computer software, accurate calculating that can finished surface porosity.
The present invention proposes and a kind ofly in the hole of wherein said rock, be filled with fluorescent material for scanning the equipment of rock face porosity, described equipment comprises: the objective table that can vertically move up and down, for placing rock sample; Objective lens, polariscope and the condenser lens above objective table, arranged from bottom to up successively, in the observation section of a focal plane of objective lens in rock sample inside; Be arranged in the laser scan unit that can move of polariscope one side, the laser of laser scan unit transmitting can project on the observation section of rock sample through polariscope and objective lens; Fluorescence incident orifice plate and the photoelectric signal amplifier above condenser lens, arranged from bottom to up successively, a focus of condenser lens is arranged in the hole of fluorescence incident orifice plate, and photoelectric signal amplifier can receive from by the fluorescence signal of the fluorescent material of laser active and be converted into electric signal; Controlled processing unit, it can control moving up and down of objective table, controls the work of laser scan unit, receives and process the electric signal from photoelectric signal amplifier.
In one embodiment, the displacement of objective table is in 10
-1micron dimension.So can ensure the precision of measuring.
In one embodiment, laser scan unit can move and make laser to scan the whole observation section of rock sample.
In one embodiment, converting digital signal to from the electric signal of photoelectric signal amplifier is stored in controlled processing unit.
In one embodiment, controlled processing unit can carry out by the image of the observation section of drafting rock sample the value of computing rock face rate.
Wherein, the micromotion mechanism of the above-below direction by design rock sample objective table, can change the aspect of laser scanning, obtain the complete image of rock sample different aspects, realize three-dimensional imaging by the combination of Computerized three-dimensional imaging software afterwards, by analysis software, the three-dimensional imaging obtaining is analyzed again, just can be obtained pore throat characteristic parameter in real rock sample.
Another aspect of the present invention, has proposed a kind of method that scans rock face porosity, comprising: step 1: the hole that fluorescent material is placed in to rock sample; Step 2: rock sample is placed in according on the objective table of equipment of the present invention, regulates the distance of rock sample to objective lens by controlled processing unit, in the observation section of the focal plane that makes objective lens in desired rock sample; Step 3: by the work of controlled processing unit control laser scan unit, make laser focus on the focus place of the observation section that is arranged in rock sample of described objective lens through polariscope, objective lens; Step: 4: if the rock sample at described focus place is hole, incident laser fluorescence excitation material sends fluorescence signal, receive described fluorescence signal by described photoelectric signal amplifier, described photoelectric signal amplifier converts obtained fluorescence signal to electrical signal transfer to controlled processing unit; Step 5: the whole observation section that makes incident laser scanning rock sample by the motion of described laser scan unit; Step 6: obtain needed face rate data and rock reservoir pore throat characteristic parameter after controlled processing unit is processed.
In one embodiment, in step 1, after being dissolved in epoxy resin, fluorescent material puts into container, then rock sample to be measured being put into described container makes it immerse epoxy resin completely, realizing internal pressure rising by changing the internal volume of container after seal of vessel, the epoxy resin that is dissolved with fluorescer is filled in the hole of rock sample, then takes out rock sample for imaging test.
In one embodiment, fluorescent material is rose.
In one embodiment, move up and down objective table by the vertical direction, obtain the image of different observation sections of rock sample, by controlled processing unit by the image combining of different observation sections to obtain the three-dimensional imaging of rock sample.
In one embodiment, in step 4, gather in the hole of fluorescence incident orifice plate through condenser lens after seeing through objective lens, polariscope from the fluorescence of fluorescent material, and enter photoelectric signal amplifier by the hole of fluorescence incident orifice plate.
Inventive method according to the present invention is compared with equipment with existing rock face porosity method of testing with equipment, measures accurate, simple to operate.Objective table, generating laser and three mechanisms of photoelectric signal amplifier cooperatively interact by controlled processing unit, can accurately carry out rock sample three-dimensional imaging, and accurate description rock reservoir pore throat characteristic.
Above-mentioned technical characterictic can various technical feasible modes combine to produce new embodiment, as long as can reach object of the present invention.
Brief description of the drawings
Hereinafter by based on only for the embodiment of indefiniteness and with reference to accompanying drawing, the present invention is described in more detail.Wherein:
Fig. 1 schematically illustrates according to of the present invention for scanning the equipment 50 of rock face porosity, wherein also schematically illustrates the propagation of light;
Fig. 2 schematically illustrates the effect of the aperture of fluorescence incident orifice plate 6.
In the drawings, identical member is indicated by identical Reference numeral.Accompanying drawing is not according to actual scale.
Embodiment
Carry out below with reference to accompanying drawings at length to introduce the present invention.
Fig. 1 schematically illustrates according to of the present invention for scanning the equipment 50 of rock face porosity.
Equipment 50 comprises objective table 1, and for placing rock sample 2, objective table 1 in the vertical direction can be realized upper and lower fine motion.This can realize by micromotion mechanism being set for objective table 1.
With reference to Fig. 1, above objective table 1, be furnished with from the bottom to top objective lens 3, polariscope 4 and condenser lens 5.In order to observe, make the focus of objective lens 3 in rock sample 2 inside, the focal plane of objective lens 3 is observed section.
Fluorescence incident orifice plate 6 keeps at a certain distance away and is installed on condenser lens 5 tops.And the focus of condenser lens 5 is arranged in the light hole of fluorescence incident orifice plate 6.
Photoelectric signal amplifier 7 is installed on fluorescence incident orifice plate 6 tops, and the printing opacity aperture of fluorescence incident orifice plate 6 aligns with the light entrance of photoelectric signal amplifier 7.
With reference to the left-hand side of Fig. 1, the left side of polariscope 4 is provided with laser scan unit, and laser scan unit comprises laser incident orifice plate 9, scanning mechanism 10 and generating laser 11.Laser incident orifice plate 9 and scanning mechanism 10 are all connected in generating laser 11.Scanning mechanism 10 can drive generating laser 11 and laser incident orifice plate 9 to move, and makes incident laser scan the observation section of whole rock sample 2.
The laser that generating laser 11 produces is incident upon on polariscope 4 by the aperture on laser incident orifice plate 9, laser reflexes to objective lens 3 by polariscope 4, and after converge to through objective lens 3 objective lens 3 that is positioned at rock sample 2 inside focus 14(see Fig. 2) locate.
Equipment 50 according to the present invention also comprises that computer system 8(is controlled processing unit).Power is controlled and provided to direction of motion, the move distance size of above-mentioned objective table 1 by computer system 8; The transmitting of laser scan unit is same with the instruction of scanning controls and provides power by computer system 8; The fluorescence signal that photoelectric signal amplifier 7 obtains finally passes to computer system 8 and processes, and then obtains needed face rate data and rock reservoir pore throat characteristic parameter.
In one embodiment, computer system 8 according to the present invention comprises control system, imaging system and analytic system, and objective table 1 is connected with computer system 8 with signal cable by cable, obtains fine motion signal and power; Laser scan unit (comprising scanning mechanism 10, generating laser 11 and laser incident orifice plate 9) is connected with computer system 8 with signal cable by cable, obtains the signal of scanning motion and Laser emission, and obtains power from computer system 8; Photoelectric signal amplifier 7 is connected with computer system 8 with signal cable by cable, signal cable passes to computer generated image system the photosignal obtaining, obtain the light section image of each plane of scanning motion of rock sample to be measured, and through computing machine processing, obtain the three-dimensional imaging of rock sample to be measured; Cable makes photoelectric signal amplifier 7 obtain power from computer system 8.
Fig. 2 has shown the effect schematic diagram in the hole of fluorescence incident orifice plate 6, and the light 16 that only has the point 14 on focal plane 13 to send could see through the hole of fluorescence incident orifice plate 6.The light 15 that point 12 beyond focal plane 13 sends is out of focus in the plane of fluorescence incident orifice plate 6, and therefore the overwhelming majority cannot be by the hole on fluorescence incident orifice plate 6.Therefore, the object observing point 14 on focal plane 13 presents light tone, but not 12 of observation point present black as a setting, contrast increase in this way, clear picture.In imaging process, the position in the hole of fluorescence incident orifice plate 6 presents relation one to one with the focus 14 of objective lens 3 all the time.
The invention allows for a kind of for scanning the method for rock face porosity.
In detection, first for example rosy fluorescent material is dissolved in epoxy resin, then put it in specific container, afterwards rock sample 2 to be measured is put into and made it immerse epoxy resin completely.Realizing internal pressure rising by changing the internal volume of container after seal of vessel, the epoxy resin that is dissolved with fluorescer is filled in the hole of rock sample, then take out rock sample and grind rock sample thin slice, for the imaging test of equipment 50.
The rock sample thin slice 2 preparing is placed on objective table 1, start computer system 8, regulate as requested the distance of rock sample 2 surfaces to objective lens 3, make the focal plane of objective lens 3 in expecting the rock sample section of observation, then work by computer system 8 gated sweep mechanisms 10 and generating laser 11.
The laser that generating laser 11 is launched incides on polariscope 4 by the aperture on laser incident orifice plate 9, polariscope 4 the laser reflection of incident to objective lens 3, and laser see through objective lens 3 converge in focus 14.
If focus 14 places are holes, be dissolved with the epoxy resin filling of rose-red fluorescent material, fluorescent material sends fluorescence 16 under the irradiation of laser.Fluorescence 16, through objective lens 3 and polariscope 4, then converges to the hole place on fluorescence incident orifice plate 6 by condenser lens 5, and fluorescence arrives photoelectric signal amplifier 7 by this hole afterwards.
Fluorescence signal is transformed into electric signal through photoelectric signal amplifier 7, for example, be delivered to computer system 8 by signal cable.In this way, the feature of rock sample 2 inside is just transformed into data-signal and is stored in computer system 8.
If focus 14 position places are not holes, there is no fluorescence transfer, the feature of rock interior stores with another data message.
Drive generating laser 11 and laser incident orifice plate 9 to move by scanning mechanism 10, realize incident laser the whole observation section of rock sample 2 on scanning.By computer system 8 gated sweep system works, the information on whole focal plane 13 all can be stored in computer system 8 with the form of data-signal, then by the imaging system software in computer system 8, just can draw the image of focal plane 13, through data analysis software, just can accurately calculate the value of face rate.
Control objective table 1 by computer system 8 and move up and down, just can change the position of focal plane 13, restart the imaging function of laser scan unit and computer system 8, can obtain the image in another section.Some many section imagings are processed through computer system 8, can synthesize the 3-D view of rock sample 2.
In one embodiment, because the distance of objective table 1 each motion can be as small as several microns of zero points, therefore pass through obtained 3-D view and can observe truely and accurately the hole of 2 microns of left and right, thereby can reflect truly the pore throat essential characteristic of rock reservoir.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, can carry out various improvement and can replace parts wherein with equivalent it.The present invention is not limited to disclosed specific embodiment in literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (10)
1. for scanning the equipment of rock face porosity, in the hole of wherein said rock, be filled with fluorescent material, described equipment comprises:
The objective table that can vertically move up and down, for placing rock sample;
Objective lens, polariscope and the condenser lens above described objective table, arranged from bottom to up successively, in the observation section of a focal plane of described objective lens in described rock sample inside;
Be arranged in the laser scan unit that can move of described polariscope one side, the laser of described laser scan unit transmitting can project on the observation section of described rock sample through described polariscope and described objective lens;
Fluorescence incident orifice plate and the photoelectric signal amplifier above described condenser lens, arranged from bottom to up successively, a focus of described condenser lens is arranged in the hole of described fluorescence incident orifice plate, and described photoelectric signal amplifier can receive from by the fluorescence signal of the fluorescent material of laser active and be converted into electric signal;
Controlled processing unit, it can control moving up and down of described objective table, controls the work of described laser scan unit, receives and process the electric signal from described photoelectric signal amplifier.
2. equipment according to claim 1, is characterized in that, the displacement of described objective table is in 10
-1micron dimension.
3. equipment according to claim 1 and 2, is characterized in that, described laser scan unit can move and make laser to scan the whole observation section of rock sample.
4. according to the equipment described in any one in claim 1 to 3, it is characterized in that, convert digital signal to from the electric signal of described photoelectric signal amplifier and be stored in described controlled processing unit.
5. according to the equipment described in any one in claim 1 to 4, it is characterized in that, described controlled processing unit can carry out by drawing the image of observation section of described rock sample the value of computing rock face rate.
6. pass through according to the method for the device scan rock face porosity described in any one in the claims, comprising:
Step 1: the hole that fluorescent material is placed in to rock sample;
Step 2: rock sample is placed on the objective table of described equipment, regulates the distance of rock sample to objective lens by controlled processing unit, in the observation section of the focal plane that makes objective lens in desired rock sample;
Step 3: by the work of controlled processing unit control laser scan unit, make laser focus on the focus place of the observation section that is arranged in rock sample of described objective lens through polariscope, objective lens;
Step: 4: if the rock sample at described focus place is hole, incident laser fluorescence excitation material sends fluorescence signal, receive described fluorescence signal by described photoelectric signal amplifier, described photoelectric signal amplifier converts obtained fluorescence signal to electrical signal transfer to controlled processing unit;
Step 5: the whole observation section that makes incident laser scanning rock sample by the motion of described laser scan unit;
Step 6: obtain needed face rate data and rock reservoir pore throat characteristic parameter after controlled processing unit is processed.
7. method according to claim 6, it is characterized in that, in step 1, after being dissolved in epoxy resin, fluorescent material puts into container, then rock sample to be measured being put into described container makes it immerse epoxy resin completely, realizing internal pressure rising by changing the internal volume of container after seal of vessel, the epoxy resin that is dissolved with fluorescer is filled in the hole of rock sample, then take out rock sample for imaging test.
8. according to the method described in claim 6 or 7, it is characterized in that, described fluorescent material is rose.
9. according to the method described in any one in claim 6 to 8, it is characterized in that, move up and down described objective table by the vertical direction, obtain the image of different observation sections of rock sample, by described controlled processing unit by the image combining of different observation sections to obtain the three-dimensional imaging of rock sample.
10. according to the method described in any one in claim 6 to 9, it is characterized in that, in step 4, after seeing through objective lens, polariscope from the fluorescence of fluorescent material, gather in the hole of described fluorescence incident orifice plate through described condenser lens, and enter described photoelectric signal amplifier by the hole of described fluorescence incident orifice plate.
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| CN201310192414.4A CN104181089A (en) | 2013-05-22 | 2013-05-22 | Equipment for scanning facial porosity of rock and method thereof |
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| CN201310192414.4A CN104181089A (en) | 2013-05-22 | 2013-05-22 | Equipment for scanning facial porosity of rock and method thereof |
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Cited By (9)
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| CN104931397A (en) * | 2015-06-29 | 2015-09-23 | 广州机械科学研究院有限公司 | Three-dimensional digital particle image generation device and three-dimensional digital particle image generation method based on excitation suction |
| CN105136642A (en) * | 2015-08-21 | 2015-12-09 | 中国石油天然气股份有限公司 | Compact bedrock surface porosity determination method and apparatus thereof |
| CN106840992A (en) * | 2016-12-08 | 2017-06-13 | 中国石油天然气股份有限公司 | The determination method of the intracrystalline pore Areal porosity of fine and close lacustrine facies dolomicrite |
| CN108303348A (en) * | 2017-12-20 | 2018-07-20 | 中国石油化工股份有限公司 | Polymer stretches degradation characteristic simulator and system in pore throat in reservoirs |
| CN109298010A (en) * | 2017-07-25 | 2019-02-01 | 中国石油化工股份有限公司 | A kind of system detecting core high-temperature fusion feature |
| CN110487696A (en) * | 2019-07-15 | 2019-11-22 | 大庆油田有限责任公司 | A kind of hole, physical property detection method and the device of the full ken of tight sand |
| CN110501271A (en) * | 2019-07-15 | 2019-11-26 | 大庆油田有限责任公司 | A kind of method and apparatus of detection carbonate porosity type and effective porosity |
| CN112304999A (en) * | 2020-09-16 | 2021-02-02 | 宜宾学院 | Quantitative statistics method for pore characteristics of scanning electron microscope of shale micro-nano pores |
| CN116223333A (en) * | 2023-01-06 | 2023-06-06 | 河北农业大学 | Automatic detection system for soil pore structure information |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108303348B (en) * | 2017-12-20 | 2020-07-14 | 中国石油化工股份有限公司 | Device and system for simulating tensile degradation characteristics of polymer in oil reservoir pore throat |
| CN110487696A (en) * | 2019-07-15 | 2019-11-22 | 大庆油田有限责任公司 | A kind of hole, physical property detection method and the device of the full ken of tight sand |
| CN110501271A (en) * | 2019-07-15 | 2019-11-26 | 大庆油田有限责任公司 | A kind of method and apparatus of detection carbonate porosity type and effective porosity |
| CN112304999A (en) * | 2020-09-16 | 2021-02-02 | 宜宾学院 | Quantitative statistics method for pore characteristics of scanning electron microscope of shale micro-nano pores |
| CN112304999B (en) * | 2020-09-16 | 2023-09-15 | 宜宾学院 | Quantitative statistical method for shale micro-nano pore characteristics of scanning electron microscope |
| CN116223333A (en) * | 2023-01-06 | 2023-06-06 | 河北农业大学 | Automatic detection system for soil pore structure information |
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