CN105136639A - Representation system of reservoir micro-pore structure - Google Patents
Representation system of reservoir micro-pore structure Download PDFInfo
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- CN105136639A CN105136639A CN201510450245.9A CN201510450245A CN105136639A CN 105136639 A CN105136639 A CN 105136639A CN 201510450245 A CN201510450245 A CN 201510450245A CN 105136639 A CN105136639 A CN 105136639A
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Abstract
The present invention provides a representation system of a reservoir micro-pore structure for representing the reservoir micro-pore structure with less than 50 nanometers. The representation system of the reservoir micro-pore structure includes: a slice manufacturing device for manufacturing reservoir slices; an electrode packaging device for manufacturing reservoir slice electrodes by utilizing the reservoir slices; an electrochemical deposition device for depositing crystal substances in inner pores of the reservoir slice of the reservoir slice electrode; an acquiring device, which acquires the crystal substances by removing the rock part of the reservoir slice of the deposition crystal substance; and an analysis and detection apparatus for scanning the appearance of the crystal substances. The representation system of reservoir micro-pore structure can efficiently represent the reservoir micro-pore structure with less than 50 nanometers.
Description
Technical field
The application relates to oil and gas reservoir representational field, particularly relates to a kind of characterization system of reservoir micropore structure.
Background technology
In oil-gas mining, reservoir is a kind of porous medium storing oil gas.Many macroscopic properties (as factor of porosity, permeability, capillary pressure etc.) of reservoir all depend on the physical property of fluid in its micromechanism and its solid of composition and pore space thereof.Therefore, increase substantially oil recovery factor, its theoretical research and technological development must not only rest on macro-level, must go deep into porous medium inside, conduct a research from microcosmic point.
Oil and gas reservoir micropore structure refer to reservoir rock mesoporosity and venturi geometric configuration, size, distribute and the relation that is interconnected.Oil and gas reservoir micropore structure determines the Reservoir Characters of hydrocarbon resources, supporting environment and output process, particularly for the tight sand Reservoir Body that nano level micropore structure is main, its micropore structure determines the key factor of its hole permeability characteristics especially.Therefore, how accurate characterization reservoir micropore structure has become the important issue in oil-gas exploration process.
At present, the conventional reservoir micropore structure characterizing method adopted is CT scan technology.CT scan technology is that one utilizes that X ray is comprehensive to rock sample, quick nondestructive scanning imagery on a large scale, finally utilizes the technical method of scan image digital reconstruction microscopic void Three Dimensions Structure.Described CT scan technology is divided into nanoscale CT and micron order CT, and wherein, micron order CT only can characterize the pore texture of more than micron order, and its ultimate resolution is 0.7 micron; Nanoscale CT is higher than micron order CT resolution, and the ultimate resolution in its measuring process is also only 50 nanometers.
In oil and gas development process, find to there is a large amount of micropore structure being less than 50 nanometers in the unconventional reservoir such as tight sand, shale, because CT scan technology ultimate resolution is 50 nanometers, so adopt conventional CT scan technology to be the sign demand being difficult to meet this kind of micropore structure, constrain the oil-gas exploration and development process of the unconventional reservoir such as tight sand, shale to a certain extent.So, need a kind of characterizing method of reservoir micropore structure badly so that the reservoir micropore structure being less than 50 nanometers can be characterized.
Summary of the invention
The application provides a kind of characterization system of reservoir micropore structure, can characterize the reservoir micropore structure being less than 50 nanometers.
The application provides a kind of characterization system of reservoir micropore structure, comprising:
Thin slice producing device, it is for making reservoir thin slice;
Electrode package device, it makes reservoir thin electrode for utilizing described reservoir thin slice;
Electrochemical depositer, its for utilize be electrochemically-deposited in described reservoir thin electrode reservoir thin slice internal void in depositing crystalline thing;
Acquisition device, it is for removing the rock part of the reservoir thin slice of described depositing crystalline thing to obtain described crystal;
Analysis and detection device, it is for scanning the pattern of obtained crystal.
Preferably, described thin slice producing device comprises the wiper mechanism for reservoir sample being carried out washing oil and is used for the reservoir sample after by described washing oil and is made into the cutting workpiece polishing mechanism that thickness is the reservoir thin slice of 100 nanometer ~ 1 millimeter.
Preferably, described wiper mechanism comprises the Sheng liquid part, high-pressure pump, core holding unit, the waste liquid receiver that connect in turn; Described Sheng liquid part is for holding reception organic solvent; Described high-pressure pump is for the described organic solvent that pressurizes; Described core holding unit is for holding reservoir sample; The waste liquid that described waste liquid receiver is discharged for receiving described core holding unit; Described cutting workpiece polishing mechanism comprise with cutting blade rock core cutter and there is the rock core polished silicon wafer of 100 to 2000 order numbers.
Preferably, the described electrode package device conductive layer comprised for described reservoir sheet segment rock surface is arranged conductive layer set up an organization, be used for the cutting mechanism of the described reservoir thin slice cutting that conductive layer is set, the conductive layer synsedimentary electrode that is used for the reservoir thin slice after by described cutting to be electrically connected obtain elementary reservoir thin electrode bindiny mechanism, be used for described elementary reservoir thin electrode other surfaces except rock surface to carry out the insulating mechanism that insulation processing obtains reservoir thin electrode.
Preferably, described conductive layer sets up an organization and comprises vacuum coating equipment; Described cutting mechanism comprises blade; Described bindiny mechanism comprises elargol; Described insulating mechanism comprises epoxy resin.
Preferably, described electrochemical depositer comprises power supply, the electrode be connected with described power supply, the controller that can control deposition voltage and sedimentation time and accommodates the solution vessel of electrolytic solution; Described electrode can stretch in described electrolytic solution; Described electrode comprises working electrode, to electrode and contrast electrode, described working electrode is described reservoir thin electrode; Described one electrode adopted in platinum electrode, conductive glass electrode, gold electrode, iridium electrode, lead electrode, silver electrode, graphite electrode; Described contrast electrode is selected: the one in mercury/Mercurous sulfate electrode, mercury/mercuric oxide electrode, silver/silver chloride electrode, mercurous chloride electrode, hydrogen electrode.
Preferably, described acquisition device comprising separating mechanism for being separated from described reservoir thin electrode by the reservoir thin slice of described depositing crystalline thing, accommodating the dissolving tank of lysate, accommodating the service sink of cleaning fluid.
Preferably, described analysis and detection device comprises field emission scanning electron microscope and/or environmental scanning electron microscope.
By describing above and can finding out, the characterization system that the application provides utilizes electrochemical deposition metal or semiconductor deposition can be less than the feature of hole of 10 nanometers, reservoir thin slice is utilized to make working electrode, and metallic ion is deposited in reservoir microscopic void carry out nanocrystal, the crystal of so last acquisition just can symbolize reservoir micropore structure.Described crystal can overcome CT scan technology in prior art can not characterize the micropore structure of below 50 nanometers, improves sign resolution, is conducive to studying the micropore structure in the unconventional reservoir such as shale, tight sand.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the characterizing method flow chart of steps of a kind of reservoir micropore structure of the application;
Fig. 2 is the sub-step process flow diagram of the making petrographic thin section in the characterizing method of a kind of reservoir micropore structure of the application;
Fig. 3 is the sub-step process flow diagram of the making reservoir thin electrode in the characterizing method of a kind of reservoir micropore structure of the application;
Fig. 4 is the sub-step process flow diagram of the depositing crystalline thing in the characterizing method of a kind of reservoir micropore structure of the application;
Fig. 5 is the sub-step process flow diagram of the described crystal of acquisition in the characterizing method of a kind of reservoir of the application micropore structure;
Fig. 6 is the characterization system schematic diagram of a kind of reservoir micropore structure of the application.
Embodiment
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the application's protection.
Fig. 1 is the characterizing method flow chart of steps of a kind of reservoir micropore structure that the application's embodiment provides.Described in the application, the characterizing method of reservoir micropore structure comprises the following steps.
Step S1: make reservoir thin slice.
Make reservoir thin slice and need reservoir sample, reservoir sample can be shale, sandstone, mud stone, volcanics, carbonatite, can also be rock core block, landwaste block or block sample of appearing.There is the impurity such as oil in the general internal void of described reservoir sample collected, needs to clean.By after the impurity cleanings such as described reservoir sample interior hole oil, the production methods such as described reservoir sample cutting, polishing are obtained described reservoir thin slice, described reservoir sheet thickness can control in 100 nanometer ~ 1 millimeter.
Step S2: utilize described reservoir thin slice to make reservoir thin electrode.
In this step, required reservoir thin electrode need control metallic ion and deposit in reservoir thin slice interior microscopic hole in electrochemical deposition, so will ensure that metallic ion is entered by a rock surface of reservoir thin slice and is deposited in hole in electrochemical deposition, and metallic ion can not be deposited on other positions of reservoir thin electrode.And then, need to make reservoir thin electrode equal insulation processing except the rock surface of reservoir thin slice.
So the process making described reservoir thin electrode can be: make the part rock surface of described reservoir thin slice arrange one deck conductive layer, described conductive layer described part rock surface is carried out covering and compact siro spinning technology together.Required reservoir thin electrode length and width can be 0.2 centimetre ~ 0.6 centimetre, therefore need to cut arranging the reservoir thin slice after conductive layer.Then described conductive layer and depositing electrode are electrically connected, and then insulation processing is carried out to other surfaces except the rock surface not arranging conductive layer, so just can ensure that exposed surface is in the electrolytic solution only described rock surface.
By above-mentioned production method, the metallic ion in electrolytic solution can be entered in the microscopic void of described reservoir thin slice by described rock surface, and then touches depositing electrode surface.Along with the carrying out of deposition, described metallic ion can deposit in the hole of reservoir thin slice.
Described depositing electrode can adopt the one in platinum electrode, gold electrode, conductive glass electrode, iridium electrode, lead electrode, silver electrode, graphite electrode.
Described conductive layer can adopt the alloy material of one or more in gold, iridium, graphite, silver, and its THICKNESS CONTROL is between 10 nanometer ~ 30 nanometers.The described process arranging conductive layer by described reservoir thin slice is put into vacuum, can adopt the mode of ion sputtering, sputters the conductive layer between the nanometer of one deck 10 nanometer ~ 30 at the part rock surface of described reservoir thin slice.Described insulation processing can adopt megohmite insulant to carry out modes such as spraying, coated, such as, utilize epoxy resin to carry out coated to other surfaces in reservoir thin electrode except the rock surface not arranging conductive layer, reach insulation effect.
Step S3: utilize and be electrochemically-deposited in depositing crystalline thing in the reservoir thin slice internal void of described reservoir thin electrode.
Electrochemical deposition refer to metal or alloy or metallic compound under electric field action from its compound water solution, non-aqueous solution or fused salt in the process that electrode surface is deposited, be usually attended by electron exchange.The feature of electrochemical deposition is utilized in this step, the reservoir thin electrode obtained in step S2 is immersed electrolytic solution, utilize two electrode systems or three-electrode system, adopt the mode of potentiostatic electrodeposition that the metallic ion in electrolytic solution is deposited in the microscopic void of described reservoir thin slice.
In described electrochemical deposition, sedimentation potential may be controlled to-0.5 volt ~-3 volt, and it is 10 minutes ~ 10 hours that sedimentation time controls, and can ensure good deposition effect like this.Accordingly, described concentration of electrolyte is at 0.001 mole often liter ~ 0.1 mole often liter, and electrolytic solution can adopt metal ion solution, as the one in platinum acid chloride solution, chlorauric acid solution, liquor argenti nitratis ophthalmicus.
Step S4: remove the rock part of the reservoir thin slice of described depositing crystalline thing to obtain described crystal.
In above-mentioned steps S3, after described metallic ion deposits in the microscopic void of described reservoir thin slice, deposit the pattern of crystal formed and can adapt to described micropore structure, so the pattern scanning described crystal can symbolize the micropore structure of described reservoir thin slice.Needed first to obtain described crystal before the described crystal of scanning.
Obtain described crystal to need first the reservoir thin slice of described depositing crystalline thing to be taken off from reservoir thin electrode, then the rock part of the reservoir thin slice of described depositing crystalline thing is removed.Described removing method can adopt dissolution mechanism.When taking dissolution mechanism, the concentration of selected lysate can be 0.001 mole often liter ~ 10 moles often liter, corresponding lysate can choose one in hydrofluorite, hydrochloric acid, nitric acid, phosphoric acid, also can choose mixed liquors several arbitrarily in hydrofluorite, hydrochloric acid, nitric acid, phosphoric acid.
Step S5: scanning obtain the pattern of crystal.
After obtaining described crystal, scanning electron microscope can be adopted to carry out scanning the pattern of obtained crystal.Described scanning electron microscope comprises field emission scanning electron microscope, environmental scanning electron microscope, all can apply in this step.Described scanning result is described reservoir thin slice micropore structure.
The embodiment that above-mentioned the application provides utilizes " cathodic deposition " of electrochemical deposition and metal ion deposition can be less than the feature of hole of 10 nanometers, reservoir thin slice is utilized to make working electrode, and utilize metallic ion to deposit in reservoir microscopic void to carry out nanocrystal, crystal last so just can symbolize reservoir micropore structure.Described crystal can overcome CT scan technology in prior art can not characterize the micropore structure of below 50 nanometers, improves sign resolution, is conducive to studying the micropore structure in the unconventional reservoir such as shale, tight sand.And the crystal that the characterizing method that the application provides obtains is stereoscopic three-dimensional structure, can scan reservoir micropore structure intuitively.
As shown in Figure 2, in an embodiment of the application, described step S1 comprises following sub-step:
Step S11: reservoir sample is carried out washing oil.
Rock core sandstone block is chosen as reservoir sample in the present embodiment.Washing oil operation is carried out to described rock core sandstone block, being the materials such as the oil in order to clean entrained with in described rock core sandstone bulk inner hole, making described rock core sandstone bulk inner hole non-filler, to prepare for the follow-up electrochemical deposition that carries out.
Step S12: the reservoir sample after described washing oil is made into the reservoir thin slice that thickness is 100 nanometer ~ 1 millimeter.
Now, first the rock core sandstone block after above-mentioned washing oil is carried out cutting into elementary rock core Sandstone Slice, then by smooth for described elementary rock core Sandstone Slice surface finish and be polished to the thin slice that thickness is 100 microns, obtain rock core Sandstone Slice.
The thickness of described rock core Sandstone Slice, between 100 nanometer ~ 1 millimeter, chooses 100 microns of thickness as rock core Sandstone Slice in the present embodiment.
As shown in Figure 3, in another embodiment of the application, described step S2 comprises following sub-step:
Step S21: described reservoir sheet segment rock surface is arranged conductive layer.
For ensureing that the metallic ion in electrolytic solution can enter in the microscopic void of described reservoir thin slice by the rock surface of described reservoir thin slice, and then touch depositing electrode surface, need described reservoir sheet segment surface to arrange conductive layer to possess electric conductivity, and it is inner to attract metallic ion to enter into reservoir thin slice microscopic void with this.
In this step, the described conductive layer that arranges realizes in the present embodiment like this: first described reservoir thin slice is put into vacuum, adopts the mode of ion sputtering, surface thereof sputters the platinum that a layer thickness is 20 nanometers, forms conductive layer.Reservoir sheet surface now comprises rock surface, conductive layer surface.
Described conductive layer can also adopt the alloy material of one or more in gold, iridium, graphite, silver, and its THICKNESS CONTROL is between 10 nanometer ~ 30 nanometers.
Step S22: by the described reservoir thin slice cutting arranging conductive layer.
In this step, need described conductive layer reservoir thin slice one surface that arranges to be adjacent to completely on the surface of depositing electrode, so the surface area that need control described reservoir thin slice can not be greater than the surface area of depositing electrode.Therefore, in this step, the length and width cutting covering the rock core Sandstone Slice of platinum conductive layer is 0.4 centimetre.
The length and width covering the rock core Sandstone Slice of platinum conductive layer in this step are not limited to described 0.4 centimetre, and the length and width of the rock Sandstone Slice of described covering platinum conductive layer are a certain length in 0.2 centimetre ~ 0.6 centimetre.
Step S23: the conductive layer synsedimentary electrode of the reservoir thin slice after described cutting is electrically connected, obtains elementary reservoir thin electrode.
For ensureing that described conductive layer can attract metallic ion, so described conductive layer and described depositing electrode need be electrically connected.Make when carrying out electrochemical deposition, conductive layer can attract metallic ion to deposit.Elementary reservoir thin electrode is obtained after the conductive layer synsedimentary electric connection of the reservoir thin slice after described cutting.Now, the rock surface of the reservoir thin slice in described step S21 is the rock surface of elementary reservoir thin electrode.
In this step, the conductive layer of the reservoir thin slice after described cutting is passed through the one side of elargol close adhesion at platinum electrode.Described platinum electrode is depositing electrode.
The mode of described electric connection is not limited to the above-mentioned mode by elargol adhesion, can also pass through conducting resinl, silver slurry etc.
Described depositing electrode is also not limited to and adopts above-mentioned platinum electrode, can also adopt the one in gold electrode, conductive glass electrode, iridium electrode, lead electrode, silver electrode, graphite electrode.
Step S24: insulation processing is carried out on described elementary reservoir thin electrode other surfaces except rock surface, obtains reservoir thin electrode.
For restriction electrochemical deposition reaction only occur in the rock surface entering described elementary reservoir thin electrode after, so insulation processing need be carried out in elementary reservoir thin electrode other surfaces except rock surface.
Now, by epoxy resin, described platinum electrode is not undertaken being coated with reaching insulation effect by the surface that rock core Sandstone Slice covers, obtain reservoir thin electrode.
As shown in Figure 4, in one of the application feasible embodiment, described step S3 comprises following sub-step:
Step S31: to choose concentration be platinum acid chloride solution, chlorauric acid solution, the one in liquor argenti nitratis ophthalmicus of 0.001 mole often liter ~ 0.1 mole often liter is electrolytic solution.
When carrying out electrochemical deposition, need first to choose the electrolytic solution carrying out electrochemical deposition.In the present embodiment, to choose concentration be the platinum acid chloride solution of 0.01 mole often liter is electrolytic solution.
Step S32: described reservoir thin electrode is immersed described electrolytic solution as working electrode, control sedimentation potential is-0.5 volt ~-3 volt and sedimentation time is 10 minutes ~ 10 hours.
Now, described reservoir thin electrode is immersed described platinum acid chloride solution as working electrode, adopt two electrode systems in electrochemical deposition, utilize the mode of potentiostatic electrodeposition, control sedimentation potential at-1 volt, sedimentation time is 2 hours.After reaching sedimentation time, can depositing crystalline thing in the hole of the rock core Sandstone Slice of described reservoir thin electrode.
When carrying out electrochemical deposition, present embodiment is not limited to and two above-mentioned electrode systems, and three-electrode system equally also can be suitable for.Accordingly, described sedimentation potential is at-0.5 volt ~-3 volt, and sedimentation time was at 10 minutes ~ 10 hours.
As shown in Figure 5, in one of the application concrete embodiment, described step S4 comprises following sub-step:
Step S41: the reservoir thin slice of described depositing crystalline thing is separated from described reservoir thin electrode.
For the ease of adopting dissolution mechanism to remove rock part on described reservoir thin slice in subsequent step, needing the reservoir thin slice of depositing crystalline thing to take off from reservoir thin electrode, obtaining the rock core Sandstone Slice of depositing crystalline thing platinum.
Step S42: choose that concentration is hydrofluorite, hydrochloric acid, the nitric acid of 0.001 mole often liter ~ 10 moles often liter, the mixed liquor of one or more in phosphoric acid is as lysate.
For the rock part of the reservoir thin slice by described depositing crystalline thing is removed to obtain crystal, present embodiment adopts the mode of dissolving to remove rock part.The concentration of lysate can be 0.001 mole often liter ~ 10 moles often liter, and accordingly, lysate can choose one in hydrofluorite, hydrochloric acid, nitric acid, phosphoric acid, also can choose mixed liquors several arbitrarily in hydrofluorite, hydrochloric acid, nitric acid, phosphoric acid.
Now, choosing concentration is that the hydrofluoric acid solution of 0.01 mole often liter is as lysate.
Step S43: be immersed in described lysate by the reservoir thin slice of described depositing crystalline thing, obtains crystal after the rock of the reservoir thin slice of described depositing crystalline thing is partly dissolved.
The reservoir thin slice of described depositing crystalline thing is immersed in described hydrofluoric acid solution completely, control dissolution time at 1 hour ~ 5 hours, after the rock part of the rock core Sandstone Slice of described depositing crystalline thing platinum is dissolved completely, obtain described crystal, the pattern of described crystal is the micropore structure of rock core Sandstone Slice inside.
Refer to Fig. 6, the application's embodiment provides a kind of characterization system of reservoir micropore structure of the described characterizing method provided based on above-mentioned embodiment, and comprising: thin slice producing device 100, it is for making reservoir thin slice; Electrode package device 200, it makes reservoir thin electrode for utilizing described reservoir thin slice; Electrochemical depositer 300, its for utilize be electrochemically-deposited in described reservoir thin electrode reservoir thin slice internal void in depositing crystalline thing; Acquisition device 400, it is for removing the rock part of the reservoir thin slice of described depositing crystalline thing to obtain described crystal; Analysis and detection device 500, it is for scanning the pattern of obtained crystal.
During the characterization system using present embodiment to provide, first utilize described thin slice producing device 100 that reservoir sample is made reservoir thin slice; Described reservoir thin slice is utilized to make reservoir thin electrode by described electrode package device 200 again; Then utilized by described electrochemical depositer 300 and be electrochemically-deposited in depositing crystalline thing in the reservoir thin slice internal void of described reservoir thin electrode; The rock part of the reservoir thin slice of described depositing crystalline thing is removed again to obtain described crystal by described acquisition device 400; Finally by described analysis and detection device 500 scan obtain the pattern of crystal, and then symbolize reservoir micropore structure.
By describing above and can finding out, the characterization system that present embodiment provides utilizes electrochemical deposition metal or semiconductor deposition can be less than the feature of hole of 10 nanometers, reservoir thin slice is utilized to make working electrode, and metallic ion is deposited in reservoir microscopic void carry out nanocrystal, the crystal of so last acquisition just can symbolize reservoir micropore structure.Described crystal can overcome CT scan technology in prior art can not characterize the micropore structure of below 50 nanometers, improves sign resolution, is conducive to studying the micropore structure in the unconventional reservoir such as shale, tight sand.
Described thin slice producing device 100 can comprise the wiper mechanism for reservoir sample being carried out washing oil and be used for the reservoir sample after by described washing oil and is made into the cutting workpiece polishing mechanism that thickness is the reservoir thin slice of 100 nanometer ~ 1 millimeter.
Concrete, described wiper mechanism is that described reservoir sample carries out washing oil operation, cleans the materials such as the oil of entrained with in reservoir sample interior hole, makes non-filler in the internal void of described reservoir sample, carry out electrochemical deposition prepare so that follow-up.Described wiper mechanism can comprise the Sheng liquid part, high-pressure pump, core holding unit, the waste liquid receiver that connect in turn; Described Sheng liquid part is for holding reception organic solvent.Described organic solvent can comprise benzene, cyclohexane etc.Described Sheng liquid part can be formed primarily of the circle of one or more connection or square tube, and it has inlet and liquid outlet.Described inlet can input described organic solvent to described Sheng liquid part.Described liquid outlet is by high-pressure pump described in pipeline communication.Described high-pressure pump for the described organic solvent that pressurizes, and then can fully scrub reservoir sample described in ensureing.Described high-pressure pump is same with described core holding unit by pipeline communication, so that the organic solvent after pressurization is passed into described core holding unit.Described core holding unit is for holding reservoir sample.Reservoir sample is cleaned by described organic solvent in described core holding unit inside.One end of described core holding unit is connected with described waste liquid receiver by pipeline.The waste liquid that described waste liquid receiver is discharged for receiving described core holding unit.Further, described waste liquid receiver can be beaker or Plastic Drum.
Described cutting workpiece polishing mechanism can comprise with cutting blade rock core cutter and there is the rock core polished silicon wafer of 100 to 2000 order numbers.In practical operation, reservoir sample first can be cut into elementary reservoir sample thin slice by described cutting workpiece polishing mechanism, and then, described rock core polished silicon wafer can by the surface finish polishing of described elementary reservoir sample thin slice, follow-uply arranges conductive layer to facilitate.
The conductive layer that described electrode package device 200 can comprise for described reservoir sheet segment rock surface is arranged conductive layer sets up an organization, for the cutting mechanism that the described reservoir thin slice arranging conductive layer is cut, for the conductive layer synsedimentary electrode of the reservoir thin slice after described cutting being electrically connected the bindiny mechanism obtaining elementary reservoir thin electrode, for the insulating mechanism that insulation processing obtains reservoir thin electrode is carried out on described elementary reservoir thin electrode other surfaces except rock surface.
Concrete, described conductive layer sets up an organization and comprises vacuum coating equipment.Described vacuum coating equipment is by described reservoir thin slice being put into vacuum and forming certain thickness metal level by the mode of ion sputtering on the surface of described reservoir thin slice, i.e. described conductive layer.Described cutting mechanism can comprise blade, in view of reservoir sheet thickness is less, now adopts and manually cuts.Described bindiny mechanism can comprise elargol.When using described elargol, manually described elargol is spread upon on described conductive layer or on depositing electrode, then by the two adhesion, and form elementary reservoir thin electrode.Described insulating mechanism comprises epoxy resin.Described epoxy resin adopts the mode of manually smearing to spread upon on the non-rock surface of elementary reservoir thin electrode equally, and then obtains reservoir thin electrode.
Described electrochemical depositer 300 can comprise: power supply, the electrode be connected with described power supply, the controller that can control deposition voltage and sedimentation time and accommodate the solution vessel of electrolytic solution.Described power supply comprises voltage stabilizing, the current stabilization equipment that electrochemical workstation, potentiostat, galvanostat etc. have constant output voltage or electric current.Described solution vessel are the container of splendid attire electrolytic solution; Described container is made up of a kind of material in metal, glass, plastics, organic glass.Described concentration of electrolyte is at 0.001 mole often liter ~ 0.1 mole often liter, and described electrolytic solution can adopt metal ion solution, as the one in platinum acid chloride solution, chlorauric acid solution, liquor argenti nitratis ophthalmicus.
Described controller can control deposition voltage and the sedimentation time of described electrode, preferably, described controller can control sedimentation potential for-0.5 volt ~-3 volt and sedimentation time be 10 minutes ~ 10 hours.Described controller can be software, program, think PLC, industrial computer etc., concrete, described controller can comprise the test analysis software of one or several technology modules composition in continuous current, constant voltage, invariable power, permanent resistance, cyclic voltammetric, AC impedance.
Described electrode can stretch in described electrolytic solution.Described electrode can comprise working electrode, to electrode and contrast electrode.Described working electrode is described reservoir thin electrode.Described one electrode adopted in platinum electrode, conductive glass electrode, gold electrode, iridium electrode, lead electrode, silver electrode, graphite electrode.Described contrast electrode selects the one in mercury/Mercurous sulfate electrode, mercury/mercuric oxide electrode, silver/silver chloride electrode, mercurous chloride electrode, hydrogen electrode.
Described acquisition device 400 can comprising separating mechanism for being separated from described reservoir thin electrode by the reservoir thin slice of described depositing crystalline thing, accommodating the dissolving tank of lysate, accommodating the service sink of cleaning fluid.Described lysate can choose that concentration is hydrofluorite, hydrochloric acid, the nitric acid of 0.001 mole often liter ~ 10 moles often liter, the mixed liquor of one or more in phosphoric acid is as lysate.Described cleaning fluid can adopt water.Described dissolving tank and described service sink all can adopt beaker.Described separating mechanism can comprise heating plate or contain liquid part, accordingly, adopt heating or reservoir thin electrode is immersed and fill in the Sheng liquid part of the organic solvents such as acetone, benzene, cyclohexane, the reservoir thin slice of described depositing crystalline thing is separated from described reservoir thin electrode.
Described analysis and detection device 500 comprises field emission scanning electron microscope and/or environmental scanning electron microscope.Described scanning result is described reservoir thin slice micropore structure.
More than show and describe the advantage of the ultimate principle of the application, principal character and the application.The technician of the industry should understand; the application is not by the restriction of above-mentioned embodiment; the principle that the application is just described described in above-mentioned embodiment and instructions; under the prerequisite not departing from the application's spirit and scope; the application also has various changes and modifications, and these changes and improvements all fall into and this application claims in the scope of protection.This application claims protection domain to be defined by appending claims and equivalent thereof.
Claims (8)
1. a characterization system for reservoir micropore structure, is characterized in that, comprising:
Thin slice producing device, it is for making reservoir thin slice;
Electrode package device, it makes reservoir thin electrode for utilizing described reservoir thin slice;
Electrochemical depositer, its for utilize be electrochemically-deposited in described reservoir thin electrode reservoir thin slice internal void in depositing crystalline thing;
Acquisition device, it is for removing the rock part of the reservoir thin slice of described depositing crystalline thing to obtain described crystal;
Analysis and detection device, it is for scanning the pattern of obtained crystal.
2. the characterization system of reservoir micropore structure as claimed in claim 1, is characterized in that: described thin slice producing device comprises the wiper mechanism for reservoir sample being carried out washing oil and is used for the reservoir sample after by described washing oil and is made into the cutting workpiece polishing mechanism that thickness is the reservoir thin slice of 100 nanometer ~ 1 millimeter.
3. the characterization system of reservoir micropore structure as claimed in claim 2, is characterized in that: described wiper mechanism comprises the Sheng liquid part, high-pressure pump, core holding unit, the waste liquid receiver that connect in turn; Described Sheng liquid part is for holding reception organic solvent; Described high-pressure pump is for the described organic solvent that pressurizes; Described core holding unit is for holding reservoir sample; The waste liquid that described waste liquid receiver is discharged for receiving described core holding unit; Described cutting workpiece polishing mechanism comprise with cutting blade rock core cutter and there is the rock core polished silicon wafer of 100 to 2000 order numbers.
4. the characterization system of reservoir micropore structure as claimed in claim 1, it is characterized in that: the conductive layer that described electrode package device comprises for described reservoir sheet segment rock surface is arranged conductive layer sets up an organization, for the cutting mechanism that the described reservoir thin slice arranging conductive layer is cut, for the conductive layer synsedimentary electrode of the reservoir thin slice after described cutting being electrically connected the bindiny mechanism obtaining elementary reservoir thin electrode, for the insulating mechanism that insulation processing obtains reservoir thin electrode is carried out on described elementary reservoir thin electrode other surfaces except rock surface.
5. the characterization system of reservoir micropore structure as claimed in claim 4, is characterized in that: described conductive layer sets up an organization and comprises vacuum coating equipment; Described cutting mechanism comprises blade; Described bindiny mechanism comprises elargol; Described insulating mechanism comprises epoxy resin.
6. the characterization system of reservoir micropore structure as claimed in claim 1, is characterized in that: described electrochemical depositer comprises power supply, the electrode be connected with described power supply, the controller that can control deposition voltage and sedimentation time and accommodates the solution vessel of electrolytic solution; Described electrode can stretch in described electrolytic solution; Described electrode comprises working electrode, to electrode and contrast electrode, described working electrode is described reservoir thin electrode; Described one electrode adopted in platinum electrode, conductive glass electrode, gold electrode, iridium electrode, lead electrode, silver electrode, graphite electrode; Described contrast electrode is selected: the one in mercury/Mercurous sulfate electrode, mercury/mercuric oxide electrode, silver/silver chloride electrode, mercurous chloride electrode, hydrogen electrode.
7. the characterization system of reservoir micropore structure as claimed in claim 1, is characterized in that: described acquisition device comprising separating mechanism for being separated from described reservoir thin electrode by the reservoir thin slice of described depositing crystalline thing, accommodating the dissolving tank of lysate, accommodating the service sink of cleaning fluid.
8. the characterization system of reservoir micropore structure as claimed in claim 1, is characterized in that: described analysis and detection device comprises field emission scanning electron microscope and/or environmental scanning electron microscope.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/749,502 | 2015-06-24 | ||
| US14/749,502 US9739134B2 (en) | 2014-06-24 | 2015-06-24 | Characterization method for a reservoir micro pore structure and a system thereof |
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| CN105136639A true CN105136639A (en) | 2015-12-09 |
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Cited By (3)
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| CN107422367A (en) * | 2016-05-23 | 2017-12-01 | 中国石油化工股份有限公司 | Water-sensitive mineral artificial core and preparation method thereof and petrophysical model |
| CN107727653A (en) * | 2016-08-10 | 2018-02-23 | 中国石油天然气股份有限公司 | The preparation of saliferous reservoir samples and evaluation method |
| CN116342541A (en) * | 2023-03-29 | 2023-06-27 | 中国矿业大学 | Rock-soil body permeability calculation method based on adjacent image pore fusion reconstruction |
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| US6714871B1 (en) * | 2002-10-31 | 2004-03-30 | Schlumberger Technology Corporation | Method for quantifying permeability of vuggy carbonates using wireline logs |
| CN104089863A (en) * | 2014-06-24 | 2014-10-08 | 中国石油天然气股份有限公司 | Characterization method for reservoir micro-pore structure |
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| US6714871B1 (en) * | 2002-10-31 | 2004-03-30 | Schlumberger Technology Corporation | Method for quantifying permeability of vuggy carbonates using wireline logs |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422367A (en) * | 2016-05-23 | 2017-12-01 | 中国石油化工股份有限公司 | Water-sensitive mineral artificial core and preparation method thereof and petrophysical model |
| CN107727653A (en) * | 2016-08-10 | 2018-02-23 | 中国石油天然气股份有限公司 | The preparation of saliferous reservoir samples and evaluation method |
| CN116342541A (en) * | 2023-03-29 | 2023-06-27 | 中国矿业大学 | Rock-soil body permeability calculation method based on adjacent image pore fusion reconstruction |
| CN116342541B (en) * | 2023-03-29 | 2024-03-22 | 中国矿业大学 | Rock-soil body permeability calculation method based on adjacent image pore fusion reconstruction |
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