CN106705835B - The method of precise measurement hydrocarbon inclusion volume - Google Patents
The method of precise measurement hydrocarbon inclusion volume Download PDFInfo
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- CN106705835B CN106705835B CN201510412238.XA CN201510412238A CN106705835B CN 106705835 B CN106705835 B CN 106705835B CN 201510412238 A CN201510412238 A CN 201510412238A CN 106705835 B CN106705835 B CN 106705835B
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Abstract
The present invention provides a kind of method of precise measurement hydrocarbon inclusion volume, and the method for the precise measurement hydrocarbon inclusion volume includes: step 1, is scanned using laser confocal microscope, obtains hydrocarbon inclusion three-dimensional image；Step 2, the boundary of three-dimensional coordinate calibration three-dimensional image liquid phase is utilized under transmitted light and fluorescence；Step 3, according to the liquid phase boundary of calibration, the volume of hydrocarbon inclusion liquid phase is calculated；Step 4, the gas phase diameter d and gas phase radius R in hydrocarbon inclusion are accurately obtained using laser co-focusing micro-fluorescence spectrum；Step 5, according to formula V=(4/3) π R3Calculate the volume V of gas phase in inclusion enclave.The method of the precise measurement hydrocarbon inclusion volume uses artificial synthesized hydrocarbon inclusion standard sample and is verified, and measurement accuracy is significantly improved compared with previous technology.
Description
Technical field
The present invention relates to Fluid-inclusion analysis technical fields, especially relate to a kind of precise measurement hydrocarbon inclusion body
Long-pending method.
Background technique
Hydrocarbon charge reservoir fluid pressure change historic survey has become a heat of Hydrocarbon Formation Reservoirs historical analysis at present
Point problem.Domestic and foreign scholars begin to focus on the pressure condition and Deposits Dynamics in fluid-filled period, due to fluid inclusion
Special nature, the Geochemical Characteristics of reservoir rock fluid inclusion can be studied for paleopressure provides rare information.
The fluid inclusion formed in the unmixing system at hiding fluid, the pressure p of fluid, volume V, temperature T, stream
There is determining p-V-T-x thermodynamical equilibrium equation between body ingredient x, this, which becomes, reconstructs pressure with fluid inclusion phasor in recent years
The theoretical basis of history.Homogenization temperature T can be measured accurately in the p-V-T-x thermodynamical equilibrium equation of fluid inclusion, fluid composition x
Also there is new patented method that can measure in recent years, volume V (liquid phase volume and gaseous phase volume) is the area by two-dimensional measurement
Substituted volume is calculated, precision is inadequate.Therefore pressure when the volume V of precise measurement fluid inclusion is just captured as reconstitution fluid
The key of p.
In recent years since the precision of test equipment improves, some new test methods can obtain 3-D image, test essence
Spend more two-dimentional be greatly improved.Such as Zhou Zhenzhu obtains fluid packet using high-resolution petrographic microscope and fluorescence microscope
The method for wrapping up in body gas liquid ratio, delineates inclusion enclave and bubble boundary using mapping software, and cumulative by different slices is wrapped up
Body volume and final gas liquid ratio；Wang Cunwu etc. is using laser scanning co-focusing microscope and three-dimensional reconstruction software is combined to obtain package
The gas liquid ratio of body, Organic Inclusion bubble obtain largest air bubbles diameter using transmitted light depth scan.By to forefathers research at
Fruit analysis finds, the measurement method of hydrocarbon inclusion volume improved more in the past it is more, but there is also some yet unresolved issues,
I.e. inclusion gas phase boundray is still the eyes determination of people and leads to measurement error, is the key that influence measuring accuracy, while
There is no relevant criterion process and verification method.We have invented a kind of sides of new precise measurement hydrocarbon inclusion volume thus
Method solves the above technical problem.
Summary of the invention
The object of the present invention is to provide a kind of paleopressures that Hydrocarbon Formation Reservoirs period is obtained for application hydrocarbon inclusion gas liquid ratio
The method of the precise measurement hydrocarbon inclusion volume of important parameter is provided.
The purpose of the present invention can be achieved by the following technical measures: the method for precise measurement hydrocarbon inclusion volume, should
The method of precise measurement hydrocarbon inclusion volume includes: step 1, is scanned using laser confocal microscope, and hydro carbons is obtained
Inclusion enclave three-dimensional image；Step 2, the side of three-dimensional coordinate calibration three-dimensional image liquid phase is utilized under transmitted light and fluorescence
Boundary；Step 3, according to the liquid phase boundary of calibration, the volume of hydrocarbon inclusion liquid phase is calculated；Step 4, micro- using laser co-focusing
Fluorescence spectrum accurately obtains gas phase diameter d and gas phase radius R in hydrocarbon inclusion；Step 5, according to formula V=(4/3) π R3
Calculate the volume V of gas phase in inclusion enclave.
The purpose of the present invention can be also achieved by the following technical measures:
Step 1 includes:
Step a selects suitable oil gas inclusion；
Step b selects laser, and is arranged and adjusts the parameter of laser；
Step c carries out image scanning, saves complete series image, obtains hydrocarbon inclusion three-dimensional image；
In step a, the oil gas inclusion that selects is package volume morphing rule, meet uniform system, closed system, etc. hold
System.
Step b includes:
Select photomultiplier tube detectors PMT, the photomultiplier tube detectors T-PMT collecting signal of transmitted light and fluorescence letter
Number color；
It selecting laser for 488nm or 639nm, sets laser intensity as 90, Pinhole 3AU, Gain value is 500,
Frame size is 512 × 512, Speed 7, and Line step is 1, Bit 12, and Frame is set as 4 and selects mean mould
Formula, scanning mode are set as Unidirectional, scanning image size are arranged in Crop, following peripheral is without other fluorescence in selection
The inclusion enclave of the individualism of interference；
According to real-time observation situation, adjusting parameter setting carries out the live preview of sample, according to oil gas fluorescence in image
Intensity adjusts Pinhole value, Gain value, up and down by focusing and according to the image setting scanning under PMT, T-PMT both of which
Limit, setting interlamellar spacing are 0.2um.
Step 4 includes:
Selection one only passes through the straight line 1 of liquid phase hydrocarbon inclusion, measures its fluorescence intensity, obtains pure liquid phase hydro carbons package
The fluorescence intensity spectrum of body；
Selection one measures its fluorescence intensity, obtains liquid both by liquid phase further through the straight line 2 of the hydrocarbon inclusion of gas phase
Mutually and include gas phase hydrocarbon inclusion fluorescence intensity spectrum, two variation inflection points of fluorescence intensity in observation chart, and surveying
The distance d1 between two inflection points is measured, 0.02um is accurate to；
Previous step is repeated, different directions is selected to measure, obtains and was both wrapped up by liquid phase further through the hydro carbons of gas phase
The distance of the straight line 3 of body, until both there is maximum value d further through the straight line 4 of the hydrocarbon inclusion of gas phase by liquid phase in measurement,
It is considered gas phase diameter d, the calculation formula of gas phase radius R are as follows:
R=d/2.
The method of precise measurement hydrocarbon inclusion volume in the present invention is related to gas phase and liquid phase body in hydrocarbon inclusion
Long-pending precise measurement, paleopressure when being embodied as Hydrocarbon Formation Reservoirs restore to provide important parameter.This method utilizes high-resolution laser
Scanning cofocal microscope technology accurately obtains hydrocarbon inclusion three-dimensional cubic figure, and includes the liquid phase fluorescence of gas phase by measurement
Intensity, obtained spectral intensity difference in change away from, obtain inclusion enclave in gas phase diameter (precision is up to 0.02um).This method avoids
Artificial vision determines gas phase boundary bring error, and uses artificial synthesized hydrocarbon inclusion standard sample and tested
Card, measurement accuracy are significantly improved compared with previous technology.
Detailed description of the invention
Fig. 1 is the method flow diagram that liquid phase volume in hydrocarbon inclusion is accurately obtained in a specific embodiment of the invention；
Fig. 2 is that laser co-focusing microscopic fluorescence ionization meter is utilized in a specific embodiment of the invention, accurately obtains hydrocarbon
Gas phase diameter figure in class inclusion enclave.
Specific embodiment
To enable above and other objects, features and advantages of the invention to be clearer and more comprehensible, preferably implementation is cited below particularly out
Example, and cooperate shown in attached drawing, it is described in detail below.
As shown in FIG. 1, FIG. 1 is the sides that liquid phase volume in hydrocarbon inclusion is accurately obtained in a specific embodiment of the invention
Method flow chart.
In step 101, select suitable oil gas inclusion, package volume morphing rule, meet uniform system, closed system,
Iso-volume system.Process enters step 102.
In step 102, PMT (photomultiplier tube detectors), T-PMT (photomultiplier tube detectors of transmitted light) is selected to receive
Collect signal and fluorescence signal color.Process enters step 103.
In step 103, the parameter values such as laser, laser intensity are selected.Recommended parameter value, selects laser for 488nm
(639nm or other) sets laser intensity as 90, Pinhole 3AU, and Gain value is that 500, Frame size is 512 × 512,
Speed is that 7, Line step is 1, Bit 12, and Frame is set as 4 and selects mean mode, and scanning mode is set as
Scanning image size is set in Unidirectional, Crop, upper following peripheral is selected individually to deposit without what other fluorescence interfered as far as possible
Inclusion enclave.Process enters step 104.
In step 104, according to real-time observation situation, adjusting parameter setting.Live is clicked, the live preview of sample is carried out,
According to intensity adjustment Pinhole value, Gain value and the other parameters of oil gas fluorescence in image.Click Z-Stack, by focusing and
According to the image setting scanning bound under PMT, T-PMT both of which, setting interlamellar spacing is 0.2um (according to the space of instrument
Resolution ratio setting).Process enters step 105.
In step 105, Start Experiment is selected, carries out image scanning, saves complete series image, data selection
Series.Process enters step 106.
In step 106, three-dimensional image liquid phase boundary is demarcated using three-dimensional coordinate under transmitted light and fluorescence.Process into
Enter to step 107.
The body of oil gas inclusion liquid phase is calculated using 3DforLSM software according to the liquid phase boundary of calibration in step 107
Product.Process terminates.
Fig. 2 is the gas for utilizing laser co-focusing microscopic fluorescence ionization meter, accurately obtaining in hydrocarbon inclusion of the invention
Phase diameter figure.In an application specific embodiment of the invention, comprising the following steps:
In step 1, the straight line 1 for only passing through liquid phase hydrocarbon inclusion is selected, its fluorescence intensity is measured, obtains pure liquid phase
The fluorescence intensity spectrum of hydrocarbon inclusion.Process enters step 1.
In step 2, one is selected both by liquid phase further through the straight line 2 of the hydrocarbon inclusion of gas phase, it is strong to measure its fluorescence
Degree obtains liquid phase and includes the fluorescence intensity spectrum of the hydrocarbon inclusion of gas phase.Two variations of fluorescence intensity in observation chart
Inflection point, and measure the distance d (accurate 0.02um) between two inflection points.Process enters step 3.
In step 3, step 2 is repeated, different directions is selected to measure, obtains the hydro carbons both by liquid phase further through gas phase
The distance of the straight line 3 of inclusion enclave, until both there is maximum further through the straight line 4 of the hydrocarbon inclusion of gas phase by liquid phase in measurement
Value d is considered the diameter of gas phase.Process enters step 4.
The volume V of gas phase is calculated as follows in step 4, inclusion enclave
R=d/2
V=(4/3) π R3。
Wherein, R is gas phase radius, and d is gas phase diameter.
Process terminates.
Claims (1)
1. the method for precise measurement hydrocarbon inclusion volume, which is characterized in that the method for the precise measurement hydrocarbon inclusion volume
Include:
Step 1, it is scanned using laser confocal microscope, obtains hydrocarbon inclusion three-dimensional image；
Step 2, the boundary of three-dimensional coordinate calibration three-dimensional image liquid phase is utilized under transmitted light and fluorescence；
Step 3, according to the liquid phase boundary of calibration, the volume of hydrocarbon inclusion liquid phase is calculated；
Step 4, the gas phase diameter d and gas phase radius in hydrocarbon inclusion are accurately obtained using laser co-focusing micro-fluorescence spectrum
R；
Step 5, according to formula V=(4/3) π R3Calculate the volume V of gas phase in inclusion enclave；
Step 1 includes:
Step a selects suitable oil gas inclusion；The oil gas inclusion selected be package volume morphing rule, meet uniform system,
Closed system, iso-volume system；
Step b selects laser, and is arranged and adjusts the parameter of laser；Select photomultiplier tube detectors PMT, transmitted light
Photomultiplier tube detectors T-PMT collecting signal and fluorescence signal color；Select laser for 488nm or 639nm, setting swashs
Luminous intensity is 90, Pinhole 3AU, and Gain value is that 500, Frame size is 512 × 512, Speed 7, and Line step is
1, Bit 12, Frame are set as 4 and select mean mode, and scanning mode is set as Unidirectional, are arranged in Crop
Scanning image size, the inclusion enclave for the individualism that following peripheral is interfered without other fluorescence in selection；
According to real-time observation situation, adjusting parameter setting carries out the live preview of sample, according to the intensity of oil gas fluorescence in image
Pinhole value, Gain value are adjusted, by focusing and according to the image setting scanning bound under PMT, T-PMT both of which, if
Setting interlamellar spacing is 0.2um；
Step c carries out image scanning, saves complete series image, obtains hydrocarbon inclusion three-dimensional image；
Step 4 includes:
Selection one only passes through the straight line 1 of liquid phase hydrocarbon inclusion, measures its fluorescence intensity, obtains pure liquid phase hydrocarbon inclusion
Fluorescence intensity spectrum；
Selection one measures its fluorescence intensity both by liquid phase further through the straight line 2 of the hydrocarbon inclusion of gas phase, obtain liquid phase and
The fluorescence intensity spectrum of hydrocarbon inclusion comprising gas phase, two variation inflection points of fluorescence intensity in observation chart, and measure two
Distance d1 between a inflection point, is accurate to 0.02um；
Previous step is repeated, different directions is selected to measure, obtains the hydrocarbon inclusion for both passing through liquid phase further through gas phase
The distance of straight line 3 is recognized until both there is maximum value d further through the straight line 4 of the hydrocarbon inclusion of gas phase by liquid phase in measurement
To be gas phase diameter d, the calculation formula of gas phase radius R are as follows: R=d/2.
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| CN108563890A (en) * | 2018-04-23 | 2018-09-21 | 湖南工业大学 | A kind of quartz sand gas liquid inclusion three dimensional PIC code system |
| CN112824880A (en) * | 2019-11-20 | 2021-05-21 | 中国石油天然气股份有限公司 | Method and device for acquiring gas-liquid ratio of fluid inclusion |
| CN113884420A (en) * | 2020-07-02 | 2022-01-04 | 中国石油化工股份有限公司 | Method for accurately acquiring fluorescence oil-containing porosity in clastic rock reservoir |
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