CN107366538A - Reflect the phase percolation curve New Method for Processing of different reservoir percolation ability difference - Google Patents
Reflect the phase percolation curve New Method for Processing of different reservoir percolation ability difference Download PDFInfo
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- CN107366538A CN107366538A CN201611164620.4A CN201611164620A CN107366538A CN 107366538 A CN107366538 A CN 107366538A CN 201611164620 A CN201611164620 A CN 201611164620A CN 107366538 A CN107366538 A CN 107366538A
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- 238000005325 percolation Methods 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000012545 processing Methods 0.000 title claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 20
- 230000035699 permeability Effects 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 11
- 239000011229 interlayer Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 14
- 239000012530 fluid Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 4
- 238000003672 processing method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- -1 wetabilitys Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The present invention provides a kind of phase percolation curve New Method for Processing for reflecting different reservoir percolation ability difference, and the phase percolation curve New Method for Processing of the reflection different reservoir percolation ability difference includes：Step 1, phase percolation curve data is collected, selectes sample rock sample；Step 2, identical substratum is mutually oozed into data and carries out conventional normalized；Step 3, each substratum percolation ability difference is calculated, i.e., calculates the flow coefficient of each substratum respectivelyAnd calculate each substratumThe weight accounted for；Step 4, the phase percolation curve of CALCULATING OILFIELD block or unit.The phase percolation curve New Method for Processing of the reflection different reservoir percolation ability difference, consider influence of the reservoir interlayer difference anisotropism to oil reservoir development, the difference that different reservoir contributed oil reservoir development can be more accurately embodied using this method so that the phase percolation curve after processing more meets objective reality.
Description
Technical field
The present invention relates to oil-gas field development field, especially relates to a kind of phase for reflecting different reservoir percolation ability difference
Ooze curve processing new method.
Background technology
Phase percolation curve is the concentrated expression of oil-water two-phase flow feature, and it is basic to be that water-oil phase follows in flow event
Objective law.For a certain specific oil field, block or unit, laboratory will do the phase of some core samples (hereinafter referred to as rock sample)
Permeability curve is tested.Due to differences such as the reservoir properties of each piece of rock sample, physical properties of fluids, wetabilitys, phase percolation curve there is
Different, in order to obtain representative permeability saturation curve, traditional method be choose reservoir properties, physical properties of fluids,
Wetability etc. is asked with polylith rock sample phase percolation curve similar in research oil field (block or unit) using the direct method of average of a plurality of curve
Obtain the average permeability saturation curve of oil field (block or unit).
The method is first to be standardized the phase percolation curve of each rock sample, then carries out arithmetic average and asks for averagely
Permeability saturation curve.The deficiency of two aspects be present in conventional method:First, sample rock sample after screening, will artificially store up
The very good and excessively poor rock sample of layer, physical properties of fluids is rejected, it is impossible to comprehensively, objectively reflects the true of oil field (block or unit)
Situation；Second, this method is that each bar phase percolation curve after screening is carried out into simple arithmetic average, i.e., every phase percolation curve is to most
The influence of the phase percolation curve obtained eventually is identical, it is difficult to accurately reflects influence of the reservoir heterogeneity to oil reservoir development.For
The serious oil reservoir of anisotropism, the big region of physical difference, flowing of the fluid in oil reservoir equally exist larger difference, it is necessary to build
The vertical phase percolation curve processing method that can comprehensively, accurately embody different reservoir percolation ability difference.For this, we have invented one kind
The phase percolation curve New Method for Processing of new reflection different reservoir percolation ability difference, solves above technical problem.
The content of the invention
It is an object of the invention to provide a kind of different reservoir percolation ability difference that can embody is different to oil reservoir development contribution
Reflect the phase percolation curve New Method for Processing of different reservoir percolation ability difference.
The purpose of the present invention can be achieved by the following technical measures：Reflection different reservoir percolation ability difference mutually oozes song
Line New Method for Processing, the phase percolation curve New Method for Processing of the reflection different reservoir percolation ability difference include：Step 1, phase is collected
Profile is oozed, selectes sample rock sample；Step 2, identical substratum is mutually oozed into data and carries out conventional normalized；Step 3, calculate
Each substratum percolation ability difference, i.e., the flow coefficient of each substratum is calculated respectivelyAnd calculate each substratumThe weight accounted for；Step
Rapid 4, the phase percolation curve of CALCULATING OILFIELD block or unit.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, the water-oil phase permeability experiment rock sample of each substratum of block to be evaluated is collected, is chosen respectively each small
The representative phase percolation curve experimental data of layer is standby.
In step 2, each substratum sample rock sample that will be selected in step 1, is respectively adopted the direct method of average of a plurality of curve and enters
Row normalized, the phase percolation curve of each substratum is calculated.
In step 4, by after the phase percolation curve standardization of each substratum in step 2, according to the shared power in step 3
A plurality of curve weighted average is carried out again, obtains the phase percolation curve of oil field block or unit.
Step 4 includes：
(1) experimental data of each rock sample is standardized respectively according to equation 1 below -3, and after drawing standardization
Oil-water relative permeability curve：
Sw *For SwWater saturation after standardization, Kro *(Sw *)、Krw *(Sw *) it is respectively Kro(Sw)、Krw(Sw) standardization
Oil afterwards, water relative permeability.If the K for the permeability saturation curve that laboratory is maderomax(Swi)=1.0, then need not be again
Standardize Kro(Sw), directly make Kro *(Sw *)=Kro(Sw)；
(2) on standardized curve, by abscissa Sw *M deciles are divided into from 0 to 1, each S is asked for by formula 4w *At branch,
The K of each samplero *And Krw *, so as to try to achieve average Kro *(Sw *) and Krw *(Sw *)；And make average standardization relative permeability
Curve；
n：Participate in the sum for the oil-water relative permeability curve that Average normalized permeability saturation curve calculates；
(3) by the S of each samplewi、Swmax、Kromax、KrwmaxArithmetic average is carried out respectively etc. characteristic value, and average value is made
For the characteristic value of average permeability saturation curve；Shown in equation below 5：
(4) by the S of each branch on Average normalized permeability saturation curvew *、Kro *、Krw *It is converted into Sw、Kro、Krw.Conversion
Formula is as follows：
(5) value obtained according to formula 6 draws the arithmetic average permeability saturation curve of oil field block or unit.
The phase percolation curve New Method for Processing of reflection different reservoir percolation ability difference in the present invention, is related to oil-gas field development
During development response evaluation and development index predication field, that is, reflect that different reservoir is had differences to oil reservoir due to percolation ability
Develop different water-oil phase permeability saturation curve (hereinafter referred to as phase percolation curve) processing method of contribution.Present invention introduces
Fluid flows parameter-flow coefficient of complexity in the earth formationIt is proposed a kind of phase for taking into full account interlayer seepage flow difference
Curve processing new method is oozed, i.e., according to the flow coefficient of reservoir where rock sampleIt is weighted each bar standardization of average treatment
The method of phase percolation curve point and characteristic value.This method has considered each on the basis of original a plurality of direct method of average of curve
Phase percolation curve represents the reservoir properties of reservoir, difference existing for physical properties of fluids.The percolation ability of each reservoir is not quite similar, to oil reservoir
It is also different to develop contribution, using the average weighted processing method of flow coefficient so that result more meets objective reality,
It is suitable for the needs of effect of reservoir development evaluation and trend prediction.
Brief description of the drawings
Fig. 1 is a specific implementation of the phase percolation curve New Method for Processing of the reflection different reservoir percolation ability difference of the present invention
The flow chart of example；
Fig. 2 is the phase percolation curve figure of each substratum of the block of the field of razor clam 4 in a specific embodiment of the invention；
Fig. 3 is the phase percolation curve figure of the block of the field of razor clam 4 in a specific embodiment of the invention.
Embodiment
For enable the present invention above and other objects, features and advantages become apparent, it is cited below particularly go out preferable implementation
Example, and coordinate shown in accompanying drawing, it is described in detail below.
As shown in figure 1, Fig. 1 is the phase percolation curve New Method for Processing of the reflection different reservoir percolation ability difference of the present invention
Flow chart.
Step 101, phase percolation curve data is collected, selectes sample rock sample.Collect the profit two of each substratum of block to be evaluated
Phase permeability tests rock sample, and it is standby to choose the representative phase percolation curve experimental data of each substratum respectively.
Step 103, identical substratum mutually oozes the conventional normalized of data progress.Each substratum sample that will be selected in step 101
This rock sample, the direct method of average of a plurality of curve is respectively adopted and is normalized, the phase percolation curve of each substratum is calculated.
Step 105, each substratum percolation ability difference is calculated.The flow coefficient of each substratum is calculated respectively, and is calculated each small
The weight that layer accounts for.
Step 107, CALCULATING OILFIELD (block or unit) phase percolation curve.By the phase percolation curve standard of each substratum in step 103
After change processing, a plurality of curve weighted average is carried out according to the shared weight in step 105, obtains oil field (block or unit) phase
Ooze curve.
By taking the block of the Cheng Dong oil fields field of razor clam 4 as an example, illustrate the new side of phase percolation curve processing for reflecting different reservoir percolation ability difference
The implementing procedure of method.
In step 1, Cheng Dong oil fields phase percolation curve is collected, the control field of razor clam 4 block oil-water well layering physical parameter table, selectes the field of razor clam
The phase percolation curve 10 of 4 five substratums of block.Wherein 2513 phase percolation curve of layer, 2521 phase percolation curve of layer, 3211, layer mutually oozes
Curve, 3313 phase percolation curve of layer, 342 phase percolation curve of layer.
In step 2, a plurality of phase percolation curve of identical substratum is normalized into one using the direct method of average of a plurality of curve
Phase percolation curve, i.e., 2513 phase percolation curve of layer normalize to obtain one 251Layer phase percolation curve, 3313 phase percolation curve of layer normalize
To one 331Layer phase percolation curve, 342 phase percolation curve of layer normalize to obtain one 34Layer phase percolation curve, as shown in Figure 2.
In step 3, each substratum air permeability of the block of the field of razor clam 4, effective thickness and ground viscosity of crude are compiled, is calculated
Per substratumValue, and per substratumAccount for 5 substratumsThe ratio of summation, is decimally represented, as a result as shown in table 1.
The permeability K of each substratum of block of 1 field of razor clam of table 4, thickness h and per substratumProportion table
In step 4,5 substratum phase percolation curves are normalized using the direct method of average of a plurality of curve.Specifically include：
(1) experimental data of each rock sample is standardized respectively according to below equation (formula 1-3), and draws mark
Oil-water relative permeability curve after standardization：
Sw *For SwWater saturation after standardization, Kro *(Sw *)、Krw *(Sw *) it is respectively Kro(Sw)、Krw(Sw) standardization
Oil afterwards, water relative permeability.If the K for the permeability saturation curve that laboratory is maderomax(Swi)=1.0, then need not be again
Standardize Kro(Sw), directly make Kro *(Sw *)=Kro(Sw)。
(2) on standardized curve, by abscissa Sw *M deciles are divided into from 0 to 1, each S is asked for by formula 4w *At branch,
The K of each samplero *And Krw *, so as to try to achieve average Kro *(Sw *) and Krw *(Sw *).And make average standardization relative permeability
Curve.
n：Participate in the sum for the oil-water relative permeability curve that Average normalized permeability saturation curve calculates.
(3) by the S of each samplewi、Swmax、Kromax、KrwmaxArithmetic average is carried out respectively etc. characteristic value, and average value is made
For the characteristic value of average permeability saturation curve.Shown in equation below 5：
(4) by the S of each branch on Average normalized permeability saturation curvew *、Kro *、Krw *It is converted into Sw、Kro、Krw.Conversion
Formula is as follows：
(5) value obtained according to formula 6 draws the arithmetic average permeability saturation curve of oil field (block or unit).Such as figure
Shown in 3.
The phase percolation curve New Method for Processing of reflection different reservoir percolation ability difference in the present invention, it is contemplated that reservoir interlayer
Influence of the difference anisotropism to oil reservoir development, it can more accurately embody what different reservoir was contributed oil reservoir development using this method
Difference so that the phase percolation curve after processing more meets objective reality.
Claims (5)
1. reflect the phase percolation curve New Method for Processing of different reservoir percolation ability difference, it is characterised in that the reflection different reservoir
The phase percolation curve New Method for Processing of percolation ability difference includes：
Step 1, phase percolation curve data is collected, selectes sample rock sample；
Step 2, identical substratum is mutually oozed into data and carries out conventional normalized；
Step 3, each substratum percolation ability difference is calculated, i.e., calculates the flow coefficient of each substratum respectivelyAnd calculate each substratumThe weight accounted for；
Step 4, the phase percolation curve of CALCULATING OILFIELD block or unit.
2. the phase percolation curve New Method for Processing of reflection different reservoir percolation ability difference according to claim 1, its feature
It is, in step 1, collects the water-oil phase permeability experiment rock sample of each substratum of block to be evaluated, choose each substratum respectively
Representative phase percolation curve experimental data is standby.
3. the phase percolation curve New Method for Processing of reflection different reservoir percolation ability difference according to claim 1, its feature
It is, in step 2, each substratum sample rock sample that will be selected in step 1, the direct method of average of a plurality of curve is respectively adopted and is returned
One change is handled, and the phase percolation curve of each substratum is calculated.
4. the phase percolation curve New Method for Processing of reflection different reservoir percolation ability difference according to claim 1, its feature
It is, in step 4, after the phase percolation curve standardization of each substratum in step 2, according to the shared weight in step 3
A plurality of curve weighted average is carried out, obtains the phase percolation curve of oil field block or unit.
5. the phase percolation curve New Method for Processing of reflection different reservoir percolation ability difference according to claim 4, its feature
It is, step 4 includes：
(1) experimental data of each rock sample is standardized respectively according to equation 1 below -3, and draws the oil after standardization
Water permeability saturation curve：
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The K of productro *And Krw *, so as to try to achieve average Kro *(Sw *) and Krw *(Sw *)；And it is bent to make average standardization relative permeability
Line；
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n：Participate in the sum for the oil-water relative permeability curve that Average normalized permeability saturation curve calculates；
(3) by the S of each samplewi、Swmax、Kromax、KrwmaxThese characteristic values carry out arithmetic average respectively, and using average value as flat
The characteristic value of equal permeability saturation curve；Shown in equation below 5：
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(5) value obtained according to formula 6 draws the arithmetic average permeability saturation curve of oil field block or unit.
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