CN109025924B - Oil saturation dynamic monitoring platform based on microcosmic rock slice - Google Patents
Oil saturation dynamic monitoring platform based on microcosmic rock slice Download PDFInfo
- Publication number
- CN109025924B CN109025924B CN201810432431.3A CN201810432431A CN109025924B CN 109025924 B CN109025924 B CN 109025924B CN 201810432431 A CN201810432431 A CN 201810432431A CN 109025924 B CN109025924 B CN 109025924B
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- Prior art keywords
- rock slice
- saturation
- ultraviolet
- micro
- oil
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- 239000011435 rock Substances 0.000 title claims abstract description 37
- 238000012544 monitoring process Methods 0.000 title claims abstract description 11
- 238000002211 ultraviolet spectrum Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001228 spectrum Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract 2
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000003595 spectral effect Effects 0.000 claims description 7
- 238000000862 absorption spectrum Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 230000005693 optoelectronics Effects 0.000 claims 2
- 239000012530 fluid Substances 0.000 abstract description 8
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 abstract 1
- 238000012795 verification Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 11
- 238000002474 experimental method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004451 qualitative analysis Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention belongs to the technical field of petroleum exploration and development, and particularly relates to an oil saturation dynamic monitoring platform based on a microcosmic rock slice. The technical scheme of the invention is as follows: the motor is automatically controlled to position the observation point of the rock slice fixed on the experimental platform; the fiber channel is arranged to realize the collection of the ultraviolet spectrum of the micro-region of the rock slice; the ultraviolet spectrum generation and acquisition combination instrument realizes the acquisition of the rock slice image; the microcomputer automatic processing system realizes the conversion of the spectrum peak value and the fluid saturation. The platform can be used for researching microcosmic water flooding mechanism, verification of improving recovery technical effect and the like in the petroleum industry, can also be used for discussing fluid flow mechanism under different microstructures, and has the characteristics of high automation degree and capability of quantitatively monitoring and characterizing.
Description
Technical Field
The invention belongs to the technical field of petroleum exploration and development, and particularly relates to an oil saturation dynamic monitoring platform based on a microcosmic rock slice.
Background
The microscopic oil displacement experiment can provide a powerful basis for improving the recovery ratio of crude oil. The difficulty of microscopic oil displacement experiments is to find out the distribution of the fluid in the pores and the dynamic change process thereof in the oil displacement process, and the existing experiments can not well solve the problem. At present, in displacement experiments, methods such as visual observation, electrical measurement and the like are generally adopted for analysis, wherein the former method can only carry out qualitative analysis, and light oil and water which do not have obvious appearance differences cannot be distinguished. The latter requires the laying of a large number of electrodes, which is difficult to measure in the whole area and to characterize the change in pore size due to the complexity. In addition, photographic mode is adopted, fluid distribution in different periods is obtained through image analysis so as to analyze plane change of the fluid, but the method is based on image difference of visible light, and can only distinguish the change of the fluid with large difference between the displacement agent and the original fluid, and can only give qualitative analysis and cannot give quantitative change. In particular, there is currently no platform that can provide continuous saturation change monitoring over multiple periods of time during a displacement process.
Disclosure of Invention
The invention aims to provide a dynamic oil saturation monitoring platform based on a microcosmic rock slice, which can be used for achieving the monitoring aim.
The invention realizes the aim through the following technical scheme:
1) Placing the rock slice in displacement on an objective table, and irradiating the rock slice with ultraviolet light by an ultraviolet light emitting device;
2) Receiving transmitted ultraviolet light through an ultraviolet light intensity detection probe, inputting the ultraviolet light into a spectrometer through a lead, and recording the transmitted light intensity of a measuring point micro-area;
3) Moving the rock slice to the next measuring point through an automatic control system, and recording the transmission light intensity of the measuring point micro-area;
4) Repeating the step 3 until the measurement of all the measuring points is completed, and obtaining the absorption spectrum of each micro area of the whole rock slice;
5) Computer software system based on water saturation S of micro-region Δp w ' and spectral intensity I, i.e. S w ' F (I), each micro-region absorption spectrum is converted into the water saturation of the whole region
According to the saturation S of oil o ＝1-S w From the water saturation S of the whole zone w Calculating the oil saturation S of the whole region o ；
6) The value of the saturation of oil obtained by the computer software system can be output numerically by an output device or as a two-dimensional saturation contour map.
The invention has the beneficial effects and advantages that: 1. the invention adopts the observation platform system with automatic moving and positioning functions, and has the characteristic of high degree of automation; 2. the invention monitors in the displacement experiment process, and can effectively represent the dynamic process in the displacement experiment; 3. the invention adopts an automatic control system, has simple and convenient operation, is quick, has visual result and can select various output modes.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a diagram of the algorithm logic structure of the software analysis system according to the present invention.
Fig. 3 is a measurement flow chart of the present invention.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
as shown in fig. 1, the invention is composed of a stage system 1, an ultraviolet spectrum generation-receiving system 2, a photoelectric integrated test platform control system 4 and a computer software system 3, wherein the stage system 1 carries an experimental rock slice, a part of the ultraviolet spectrum generation-receiving system 2 is arranged below the rock slice to irradiate ultraviolet light on the rock slice, a part of the ultraviolet spectrum generation-receiving system receives transmitted light above the rock slice, the photoelectric integrated test platform control system 4 is connected with the stage system 1 and the ultraviolet spectrum generation-receiving system 2 to keep the movement and spectrum collection of a platform where the rock slice is positioned consistent, the computer software system 3 is connected with the ultraviolet spectrum generation-receiving system 2 through a USB wire, and the algorithm program of the computer software system 3 converts the spectrum intensity of the transmitted light received by the ultraviolet spectrum generation-receiving system 2 into an oil saturation value.
The objective table system 1 comprises an observation table 1a, a bracket 1d and an automatic control module 1b; the observation table 1a carries experimental rock slices, and the observation table 1a is supported by a bracket 1d and is connected with an automatic control module 1b through a data line by the bracket 1 d.
The observation table 1a is made of transparent homogeneous body; two sets of micro-distance automatic motors 1c are arranged on the observation platform 1a, so that micro-distance automatic movement of the observation platform 1a in the left-right direction and the front-back direction is realized, and the position of the observation platform 1a is determined; the bracket 1d can stretch back and forth and move left and right; the automatic control module 1b is a conventional numerical control program module, and the running of the program is controlled by a computer.
The ultraviolet spectrum generating-receiving system 2 comprises an ultraviolet spectrometer 2a, an ultraviolet light emitting device 2b and an ultraviolet light intensity detecting probe 2c; the ultraviolet light emergent device 2b is connected with the ultraviolet spectrometer 2a emergent light interface 2d by adopting an optical fiber with the diameter of 1.5 mm; the ultraviolet intensity detection probe 2c is connected with the incident interface 2e of the ultraviolet spectrometer 2a by adopting a standard cable; the ultraviolet light emitting device 2b is arranged below the rock slice area of the observation table 1a and is used as an irradiation light source; the ultraviolet intensity detection probe 2c is suspended above the observation table 1a and is on the same axis with the irradiation light source.
The computer software system 3 comprises a computer or CPU5, a software analysis system and an output device 6; the computer or CPU5 is connected to the spectrometer 2a by a USB cable.
The computer or CPU5 is the basic hardware of the computer; the software analysis system is an algorithm program with the function of converting the spectrum intensity into the fluid saturation; the output device 6 includes a display 6a and a printer 6b.
As shown in fig. 2, the algorithm flow of the software analysis system is as follows: firstly, obtaining a spectral intensity spectrum of rock slice in theoretical saturated oil and a spectral intensity spectrum of rock slice in complete displacement through experiments, extracting water peak signals, thus obtaining spectral intensity I and theoretical water saturation S w And (3) respectively giving different coefficient values according to whether the spectral intensity and the water saturation are in a linear relation or an exponential relation, determining a quantitative function relation by using the coefficient of a regression equation of a least square estimation method, judging whether the regression equation is in accordance with the actual condition by using the correlation coefficient as an evaluation standard, and enabling the function relation to be optimal by changing the coefficient value. In the experimental process, a spectrum intensity diagram of a rock slice at a certain moment is directly obtained by an ultraviolet spectrometer, and the water saturation S at the moment is calculated according to an established regression equation w At the same time obtain oil saturation S o Finally display and output S o 、S w S at different moments o 、S w And directly generating an S-t change curve.
As shown in fig. 3, the implementation process of the present invention includes the following steps:
1) Placing the rock slice in displacement on an observation table 1a, and irradiating the rock slice with ultraviolet light by an ultraviolet light emitting device 2 b;
2) The transmitted ultraviolet light is received by an ultraviolet light intensity detection probe 2c and is input into a spectrometer 2a through a lead, and the transmitted light intensity of a measuring point micro-area is recorded;
3) Moving the rock slice to the next measuring point through the automatic control system 1b, and recording the transmission light intensity of the micro-area of the measuring point;
4) Repeating the step 3 until the measurement of all the measuring points is completed, and obtaining the absorption spectrum of each micro area of the whole rock slice;
5) The computer software system 3 is based on the water saturation S of the micro-region Δp w ' and spectral intensity I, i.e. S w ' F (I), each micro-region absorption spectrum is converted into the water saturation of the whole regionAccording to the saturation S of oil o ＝1-S w From the water saturation S of the whole zone w Calculating the oil saturation S of the whole region o ；
6) The value of the saturation of oil obtained by the computer software system 3 may be output numerically by the output means 6 or as a two-dimensional saturation contour map.
Other not described in detail are known in the art.
Claims (2)
1. The oil saturation dynamic monitoring platform based on the microcosmic rock slice is characterized by realizing the detection purpose by the following steps:
1) Placing the rock slice in displacement on an observation table (1 a), and irradiating the rock slice with ultraviolet light by an ultraviolet light emitting device (2 b);
2) Receiving transmitted ultraviolet light through an ultraviolet light intensity detection probe (2 c), inputting the ultraviolet light into a spectrometer (2 a) through a lead, and recording the transmitted light intensity of a measuring point micro-area;
3) Moving the rock slice to the next measuring point through an automatic control system (1 b), and recording the transmission light intensity of the micro-area of the measuring point;
4) Repeating the step 3 until the measurement of all the measuring points is completed, and obtaining the absorption spectrum of each micro area of the whole rock slice;
5) The computer software system (3) is based on the water saturation of the micro-region ΔpAnd spectral intensity I, i.e. +.>Conversion of the absorption spectrum of each micro-region into the water saturation of the whole region +.>=/>According to the saturation S of oil o = 1- S w From the water saturation of the whole region +.>Calculate the oil saturation of the whole region +.>；
6) The value of the saturation of the oil, obtained by the computer software system (3), is output numerically by output means (6) or in a two-dimensional saturation contour map.
2. The micro-rock slice-based oil saturation dynamic monitoring platform of claim 1, wherein: the monitoring platform consists of an objective table system (1), an ultraviolet spectrum generation-receiving system (2), an optoelectronic integrated testing platform control system (4) and a computer software system (3), wherein the objective table system (1) carries an experimental rock slice, a part of the ultraviolet spectrum generation-receiving system (2) irradiates ultraviolet light on the rock slice below the rock slice, a part of the ultraviolet spectrum generation-receiving system receives transmitted light above the rock slice, the optoelectronic integrated testing platform control system (4) is connected with the objective table system (1) and the ultraviolet spectrum generation-receiving system (2) so that the movement and spectrum collection of the platform where the rock slice is located are consistent, the computer software system (3) is connected with the ultraviolet spectrum generation-receiving system (2) through a USB lead, and the algorithm program of the computer software system (3) converts the spectrum intensity of the transmitted light received by the ultraviolet spectrum generation-receiving system (2) into an oil saturation value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432431.3A CN109025924B (en) | 2018-05-08 | 2018-05-08 | Oil saturation dynamic monitoring platform based on microcosmic rock slice |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432431.3A CN109025924B (en) | 2018-05-08 | 2018-05-08 | Oil saturation dynamic monitoring platform based on microcosmic rock slice |
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| Publication Number | Publication Date |
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| CN109025924A CN109025924A (en) | 2018-12-18 |
| CN109025924B true CN109025924B (en) | 2024-04-05 |
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| CN114878513B (en) * | 2022-06-30 | 2022-09-30 | 中国矿业大学(北京) | Method and system for distinguishing water molecule state in rock water absorption process |
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