CN108956423A - Determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method - Google Patents
Determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method Download PDFInfo
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- CN108956423A CN108956423A CN201810794722.7A CN201810794722A CN108956423A CN 108956423 A CN108956423 A CN 108956423A CN 201810794722 A CN201810794722 A CN 201810794722A CN 108956423 A CN108956423 A CN 108956423A
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- rock
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
Abstract
The present invention relates to oil and gas explorations and development field, especially determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method.Method includes the following steps: (1) is directed to a set of reservoir, the different rock sample of density is chosen；(2) the porosity φ 3G that method tests all rock samples is surveyed using gas；(3) rock sample for being filled with blue epoxy resin is milled into rock casting body flake；Then microscope and matched image analysis system are utilized, for each rock casting body flake sample, chooses several representative kens；(4) according to φ 3D of different rock samples acquisition, φ 2D data, it is fitted quantitative function relationship between the two.The present invention is fitted the functional relation of φ 3D and φ 2D on the basis of using epoxy resin rock casting body flake quantitative statistics two dimension porosity φ 2D, solves the problems, such as existing to prepare calculating rock three-dimensional apertures porosity using rock two dimension porosity.
Description
Technical field
The present invention relates to oil and gas explorations and development field, especially determine rock two dimension porosity-three-dimensional pore space
Spend the method for quantitative relationship.
Background technique
Porous is the important feature of oil-bearing reservoir, and hole is also the important place of reservoir collection oil gas.Due to rock
The heterogeneity of reservoir, hole size differs in reservoir, and nanoscale hole and micron order hole are architectures normally co-exist in same rock
Shi Zhong；Due to the complexity of evolutionary process, primary pore and secondary pore are often coexisted in same rock in rock.Porosity is
The important parameter of voids content in rock is characterized, three-dimensional apertures porosity (φ 3D) and two-dimentional porosity (φ 2D) are commonly used for quantitative mark
Reservoir space ratio in quasi- rock.Three-dimensional apertures porosity is the percentage of the volume of hole and sillar total volume in sillar, main at present
Method (such as nitrogen) is surveyed by gas to obtain, test data is that pore-size is all greater than gas molecule diameter (0.364nm)
The total volume of hole includes primary pore and secondary pore.Two-dimentional porosity is that (rock is thin in a very thin rock slice
Piece) in, the area of hole and the percentage of the petrographic thin section gross area；Mainly by body of casting petrographic thin section, using microscope and match
The image analysis system of set obtains, and by the identification to different type hole, this method can be effectively by total pore space in rock, primary
Hole, secondary pore ratio distinguish quantitative statistics and come out.
Since current test method can not individually test the different types hole such as primary pore in rock, secondary pore
Three-dimensional apertures porosity, therefore, it is necessary to establish the functional relation of φ 3D Yu φ 2D, so as to quantitative using the rock two dimension porosity obtained
Calculate rock three-dimensional apertures porosity.Existing φ 3D and φ 2D functional relation are by the way that gas is surveyed three-dimensional apertures porosity and epoxy resin casting
Body thin slice two dimension porosity obtains after being fitted, and does not consider the molecular size difference of gas and epoxy resin, so that using existing
The three-dimensional apertures porosity for having functional relation to calculate is higher than practical three-dimensional apertures porosity, therefore, it is necessary to research and develop new technology, obtains subject to more
True rock two dimension porosity-three-dimensional apertures porosity quantitative function relationship.
Summary of the invention
The technical problem to be solved by the present invention is in order to solve existing test method can not individually test it is primary in rock
The deficiency of the three-dimensional apertures porosity of the different types hole such as hole, secondary pore, the present invention provides one kind to determine rock the two-dimentional holes
Porosity-three-dimensional apertures porosity quantitative relationship method, rock quality difference tests three-dimensional pore space before and after injecting rock by epoxy resin
Spend φ 3D, using epoxy resin rock casting body flake quantitative statistics two dimension porosity φ 2D on the basis of, fitting φ 3D and φ 2D
Functional relation, solve the problems, such as existing to prepare to calculate rock three-dimensional apertures porosity using rock two dimension porosity.
The technical solution adopted by the present invention to solve the technical problems is:
A method of determining rock two dimension porosity-three-dimensional apertures porosity quantitative relationship, characterized in that this method include with
Lower step:
(1) it is directed to a set of reservoir, the different rock sample of density is chosen, carries out setting ruler by drilling through, cutting, polish
Very little rock sample；Washing oil is carried out to rock sample, remove remaining crude oil in rock sample and is dried, remaining moisture is removed
And weigh its mass M 0；
(2) the porosity φ 3G that method tests all rock samples is surveyed using gas；Blue epoxy resin is injected into rock sample
In, then the resin for being sticked to core outside surface is removed, and weigh rock sample mass M 1；According to the density p of blue epoxy resin, note
Enter of poor quality before and after epoxy resin and rock sample volume delta M, equation φ 3D=Δ M/ ρ/V × 100% is utilized to calculate asphalt mixtures modified by epoxy resin
The rock three-dimensional apertures porosity that rouge is filled；
(3) rock sample for being filled with blue epoxy resin is milled into rock casting body flake；Then using microscope and
Matched image analysis system chooses several representative kens, counts blue in thin slice for each rock casting body flake sample
Area S1 occupied by the hole of epoxy resin filling；Calculate the gross area S2 of several kens；Using equation φ 2D=S1/S2 ×
The rock two dimension porosity that 100% calculating epoxy resin is filled；
(4) according to φ 3D of different rock samples acquisition, φ 2D data, it is fitted quantitative function relationship between the two.
Specifically, the quantity for choosing rock sample is 15.
Specifically, it is described by drill through, cut, polish come the size of ready-made rock sample be diameter 2.5cm, length
4cm。
Specifically, the temperature of the drying rock sample is 60 DEG C, and the time for drying rock sample is 2 days.
Specifically, the method blue epoxy resin injected in rock sample are as follows: rock sample is placed in body of casting instrument
In, blue epoxy resin is injected in rock sample using pressure.
Specifically, the pressure that blue epoxy resin is injected in rock sample is 5Mpa.
Specifically, the rock casting body flake with a thickness of 30um.
It is quantified the beneficial effects of the present invention are: determining rock two dimension porosity-three-dimensional apertures porosity the present invention provides one kind
The method of relationship injects rock front and back rock quality difference test three-dimensional apertures porosity φ 3D by epoxy resin, is utilizing asphalt mixtures modified by epoxy resin
On the basis of rouge rock casting body flake quantitative statistics two dimension porosity φ 2D, it is fitted the functional relation of φ 3D and φ 2D, is solved
It is existing to prepare the problem of calculating rock three-dimensional apertures porosity using rock two dimension porosity.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is techniqueflow chart of the invention；
Fig. 2 is that gas of the invention surveys rock three-dimensional apertures porosity φ 3G- casting body flake two dimension porosity φ 2D, epoxy resin rock
Stone three-dimensional apertures porosity φ 3D- casting body flake two dimension porosity φ 2D functional relation comparison diagram；
Specific embodiment
Fig. 1 is techniqueflow chart of the invention, and Fig. 2 is that gas of the invention surveys rock three-dimensional apertures porosity φ 3G
Casting body flake two dimension porosity φ 2D, epoxy resin rock three-dimensional apertures porosity φ 3D- casting body flake two dimension porosity
φ 2D functional relation comparison diagram.
As shown in Fig. 1, the present invention is the rock quality difference test three-dimensional pore space before and after using epoxy resin injection rock
Spend φ 3D, using epoxy resin rock casting body flake quantitative statistics two dimension porosity φ 2D on the basis of, fitting φ 3D and φ 2D
Functional relation.
One: being directed to a set of reservoir, choose 15 pieces of different rock samples of density；By drilling through, cutting, polish, prepare
The rock sample that diameter is 2.5cm, length is 4cm；Washing oil is carried out to rock sample, removes remaining crude oil in rock sample；
Ready rock sample is dried under the conditions of 60 DEG C 2 days, remove remaining moisture, and weigh its mass M 0.
Two: surveying the porosity φ 3G that method tests these samples first with gas；Then rock sample is placed in body of casting instrument,
Using the operating pressure of 5MPa, blue epoxy resin is injected in rock sample, removes the resin for being sticked to rock sample outer surface,
And weigh rock sample mass M 1；According to Δ M=M1-M0 of poor quality before and after the density p of blue epoxy resin, injection epoxy resin
With π × 1.252 rock sample volume V=× 4cm3, epoxy resin is calculated using equation φ 3D=Δ M/ ρ/V × 100% and is filled
The rock three-dimensional apertures porosity filled out.
Three: the rock sample for being filled with blue epoxy resin is milled into the rock casting body flake with a thickness of 30um；Then
15 representative kens, system are chosen for each rock casting body flake sample using microscope and matched image analysis system
Count area S1 occupied by the hole of blue epoxy resin filling in thin slice；Calculate the gross area S2 of 15 kens；Utilize formula
φ 2D=S1/S2 × 100% calculates the rock two dimension porosity that epoxy resin is filled.
Four: according to φ 3D of 15 rock samples acquisition, φ 2D data, being fitted quantitative function relationship between the two.
With determining for Shengli Oil Field somewhere medium coarse sand rock reservoir rock two dimension porosity and three-dimensional apertures porosity functional relation
Illustrate the specific technical solution of the present invention for process.
First: being directed to a set of reservoir, choose 15 pieces of different rock samples of density；It is quasi- by drilling through, cutting, polish
The standby core sample that diameter is 2.5cm, length is 4cm；Washing oil is carried out to sample, removes remaining crude oil in rock core；At 60 DEG C
Under the conditions of dry ready core sample 2 days, remove remaining moisture, and weigh its mass M 0.
1. core sample original quality of table
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| M0/g | 46.91 | 45.15 | 43.14 | 40.84 | 40.91 | 39.28 | 39.38 | 38.66 | 36.48 | 34.75 | 46.48 | 45.92 | 41.85 | 38.77 | 37.66 |
Second: surveying the porosity φ 3G that method tests these samples first with gas；Then sample is placed in body of casting instrument, benefit
With the operating pressure of 5MPa, blue epoxy resin is injected in rock sample, removes the resin for being sticked to core outside surface, and weigh
Rock sample mass M 1；According to Δ M=M1-M0 and rock of poor quality before and after the density p of blue epoxy resin, injection epoxy resin
π × 1.252 sample volume V=× 4cm3 calculate the rock that epoxy resin is filled using equation φ 3D=Δ M/ ρ/V × 100%
Stone three-dimensional apertures porosity.
2. Example Test Data of table
| Number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| M0/g | 46.91 | 45.15 | 43.14 | 40.84 | 40.91 | 39.28 | 39.38 | 38.66 | 36.48 | 34.75 | 46.48 | 45.92 | 41.85 | 38.77 | 37.66 |
| M1/g | 47.83 | 46.91 | 45.75 | 44.23 | 44.50 | 43.51 | 43.63 | 43.46 | 42.12 | 41.06 | 48.04 | 47.75 | 45.27 | 43.61 | 42.80 |
| ΔM/g | 0.92 | 1.75 | 2.62 | 3.39 | 3.59 | 4.24 | 4.25 | 4.79 | 5.63 | 6.32 | 1.57 | 1.82 | 3.41 | 4.84 | 5.14 |
| φ 2D/% | 2.10 | 3.44 | 6.20 | 6.80 | 9.03 | 9.51 | 11.28 | 13.85 | 15.50 | 17.77 | 3.50 | 4.80 | 7.20 | 12.10 | 14.20 |
| φ 3D/% | 3.92 | 7.50 | 11.20 | 14.50 | 15.35 | 18.13 | 18.20 | 20.52 | 24.10 | 27.04 | 6.70 | 7.80 | 14.60 | 20.70 | 22.00 |
| φ 3G/% | 9.20 | 12.05 | 15.32 | 19.05 | 18.93 | 21.58 | 21.42 | 22.58 | 26.11 | 28.93 | 9.90 | 10.80 | 17.40 | 22.40 | 24.20 |
Third: the rock sample for being filled with blue epoxy resin is milled into the rock casting body flake with a thickness of 30um；So
Microscope and matched image analysis system are utilized afterwards, for each petrographic thin section sample, choose 15 representative kens, statistics
Area S1 occupied by the hole of blue epoxy resin filling in thin slice；Calculate the gross area S2 of 15 kens；Utilize equation φ
2D=S1/S2 × 100% calculates the rock two dimension porosity that epoxy resin is filled.
4th: according to φ 3D of 15 rock samples acquisition, φ 2D data, being fitted quantitative function relationship between the two.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (7)
1. a kind of determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method, characterized in that this method includes following
Step:
(1) it is directed to a set of reservoir, chooses the different rock sample of density, carried out and be sized by drilling through, cutting, polish
Rock sample；Washing oil is carried out to rock sample, remove remaining crude oil in rock sample and dries, remove remaining moisture and claims
Measure its mass M 0；
(2) the porosity φ 3G that method tests all rock samples is surveyed using gas；Blue epoxy resin is injected in rock sample, then
The resin for being sticked to core outside surface is removed, and weighs rock sample mass M 1；According to the density p of blue epoxy resin, injection ring
Of poor quality and rock sample volume delta M before and after oxygen resin calculates epoxy resin institute using equation φ 3D=Δ M/ ρ/V × 100%
The rock three-dimensional apertures porosity of filling；
(3) rock sample for being filled with blue epoxy resin is milled into rock casting body flake；Then microscope and mating is utilized
Image analysis system choose several representative kens for each rock casting body flake sample, count blue epoxy in thin slice
Area S1 occupied by the hole of resin filling；Calculate the gross area S2 of several kens；Using equation φ 2D=S1/S2 ×
The rock two dimension porosity that 100% calculating epoxy resin is filled；
(4) according to φ 3D of different rock samples acquisition, φ 2D data, it is fitted quantitative function relationship between the two.
2. according to claim 1 determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method, feature exists
In: the quantity for choosing rock sample is 15.
3. according to claim 1 determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method, feature exists
In: it is described by drill through, cut, polish come the size of ready-made rock sample be diameter 2.5cm, length 4cm.
4. according to claim 1 determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method, feature exists
In: the temperature of the drying rock sample is 60 DEG C, and the time for drying rock sample is 2 days.
5. according to claim 1 determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method, feature exists
In: the method by blue epoxy resin injection rock sample are as follows: rock sample is placed in body of casting instrument, it will using pressure
In blue epoxy resin injection rock sample.
6. according to claim 5 determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method, feature exists
In: the pressure that blue epoxy resin is injected in rock sample is 5Mpa.
7. according to claim 1 determine rock two dimension porosity-three-dimensional apertures porosity quantitative relationship method, feature exists
In: the rock casting body flake with a thickness of 30um.
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Cited By (1)
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|---|---|---|---|---|
| CN113670791A (en) * | 2021-08-03 | 2021-11-19 | 中国地质大学（北京） | Quantitative analysis method for pore space and particle surface area of reservoir |
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Inventor after: Sun Peipei Inventor after: Wang Yanzhong Inventor after: Zhou Lihong Inventor after: Cao Yingchang Inventor after: Yuan Guanghui Inventor after: Zhao Xianzheng Inventor after: Fu Lixin Inventor after: Pu Xiugang Inventor after: Li Hongjun Inventor after: Lou Da Inventor before: Zhou Lihong Inventor before: Wang Yanzhong Inventor before: Sun Peipei Inventor before: Cao Yingchang Inventor before: Yuan Guanghui Inventor before: Zhao Xianzheng Inventor before: Fu Lixin Inventor before: Pu Xiugang Inventor before: Li Hongjun Inventor before: Lou Da |
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Application publication date: 20181207 |