CN110173259A - A kind of method of Stoneley wave energy compensating correction - Google Patents
A kind of method of Stoneley wave energy compensating correction Download PDFInfo
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- CN110173259A CN110173259A CN201910396667.0A CN201910396667A CN110173259A CN 110173259 A CN110173259 A CN 110173259A CN 201910396667 A CN201910396667 A CN 201910396667A CN 110173259 A CN110173259 A CN 110173259A
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- 238000012937 correction Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 235000019738 Limestone Nutrition 0.000 claims abstract description 13
- 239000006028 limestone Substances 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims description 12
- 238000010606 normalization Methods 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 239000006071 cream Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
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- Fluid Mechanics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a kind of methods of Stoneley wave energy compensating correction, comprising the following steps: step 1, the factor of analyzing influence Stoneley wave energy value；Step 2, the Stoneley wave energy extracted to the dipole sonic of different apparatus measures is normalized；Step 3, fine and close section enlarging rate is established using drilled well limestone segment data -- Stoneley wave energy cross plot；Determine Stoneley wave energy correction model；Step 4, Stoneley wave energy correction is carried out to individual well according to the calibration model of formation, and distinguishing validity is carried out to reservoir.The present invention establishes the relationship between enlarging rate and Stoneley wave energy attenuation using the Stoneley wave energy datum of non-Reservoir Section, establish the expanding influence calibration model of wellbore of Stoneley wave, the model is applied in the research all wells in area, the primitive attribute of Stoneley wave is reduced, is played the role of to the distinguishing validity of reservoir good.
Description
Technical field
The present invention relates to oil and gas exploration fields, carry out effective reservoir knowledge using Stoneley wave energy attenuation amplitude
Not, a kind of method of Stoneley wave energy compensating correction is provided.
Background technique
For fracture hole acid carbonate rock reservoir, conventional logging can calculate the porosity of reservoir, and imaging logging can identify
The geological phenomenons such as crack and the corrosion hole on the reservoir borehole wall are imitated, but shallower due to fathoming, is limited only near the borehole wall, it is right
In the extremely strong carbonate reservoir of heterogeneity, borehole wall distal end permeability is a weight of fracture-cavity type carbonate effective reservoir
Want index.
Even grade acoustic logging information includes the information such as the time difference and the energy of longitudinal wave, shear wave and Stoneley wave, and Stoneley wave is visited
Survey range is big, and energy attenuation is small by Lithologic Effects, and attenuation amplitude is mainly influenced by the development degree of reservoir properties, can be preferably
Reflect the permeability of reservoir, the identification to effective reservoir, Stoneley wave is even more a kind of very important information.Especially non-equal
In the strong carbonate reservoir of matter, the permeability of device to hole, hole and seam has reflection, if having the hole being connected to the borehole wall,
Crack or solution cavity exist, and Stoneley wave decaying just has response, and the connectivity of hole seam is better, and Stoneley wave decaying is just more obvious.
Summary of the invention
Present invention introduces dipole acoustic log technologies, obvious in Stoneley wave energy attenuation difference using compacted zone and reservoir
The characteristics of, effective reservoir Stoneley wave energy attenuation amplitude characteristic is found, to form the side of Stoneley wave energy compensating correction
Method.
The purpose of the present invention is achieved through the following technical solutions:
A kind of method of Stoneley wave energy compensating correction, comprising the following steps:
Step 1, the factor of analyzing influence Stoneley wave energy value；
Step 2, the Stoneley wave energy extracted to the dipole sonic of different apparatus measures is normalized；
Step 3, fine and close section enlarging rate is established using drilled well limestone segment data -- Stoneley wave energy cross plot；It determines
Stoneley wave energy correction model；
Step 4, Stoneley wave energy correction is carried out to individual well according to the calibration model of formation, and passes through Stoneley wave energy
Attenuation rate carries out distinguishing validity to reservoir.
It is preferred that choosing a fine and close cream rock as index bed, with the Stoneley wave value of index bed to work area institute
There is well Stoneley wave energy to do normalized, the Stoneley wave value after normalization is located at same codomain section in compacted zone section.
It is preferred that establishing this with Stoneley wave energy attenuation amount using the enlarging rate of work area drilled well limestone section
The wellbore effect plate of tonneau wave.
It is preferred that Stoneley wave energy value generally has exponent relation with enlarging rate, Stoneley wave value is with expanding
The increase of rate exponentially decays；
It chooses the biggish well data of enlarging rate and establishes work area Stoneley wave energy borehole correction charts, updating formula are as follows:
Y=297.5e-0.024x R2=0.8883
Then Stoneley wave correcting value: ST corrects=297.5 (1-e-0.0024*ΔCAL)
Δ CAL: enlarging rate.
It is preferred that doing full well section borehole compensation school to the Stoneley wave energy after normalization using correcting plate
Just.
The beneficial effects of the present invention are:
The present invention is established between enlarging rate and Stoneley wave energy attenuation using the Stoneley wave energy datum of non-Reservoir Section
Relationship, establish the expanding influence calibration model of wellbore of Stoneley wave, by the model apply research all wells in area in, reduction
The primitive attribute of Stoneley wave, plays the role of the distinguishing validity of reservoir good.
Detailed description of the invention
Fig. 1 is PZ113 well densification section enlarging rate -- the intersection of Stoneley wave energy；
Fig. 2 is M1 well densification section enlarging rate -- the intersection of Stoneley wave energy；
Fig. 3 is four sections of Pengzhou thunder fine and close section enlarging rates -- Stoneley wave energy intersection；
Fig. 4 is YS1 well application effect；
Fig. 5 is flow diagram of the present invention.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing, but protection scope of the present invention is not limited to
It is as described below.
As shown in figure 5, a kind of method of Stoneley wave energy compensating correction, comprising the following steps:
Step 1, the factor of analyzing influence Stoneley wave energy value, influence factor include lithology, borehole condition and measuring instrument
Device type；
Step 2, the Stoneley wave energy extracted to the dipole sonic of different apparatus measures is normalized；
Step 3, after the Stoneley wave energy attenuation Dominated Factors for determining reservoir are permeability and enlarging rate, effectively to sentence
Disconnected effective reservoir needs expanding caused Stoneley wave deamplification to reject, and the research pure limestone in stratum is non-reservoir, expanding
Phenomenon is more universal, establishes stratum enlarging rate using pure limestone extension diameter section Stoneley wave energy attenuation data and enlarging rate -- stone benefit
Wave energy cross plot；Determine the wellbore effect calibration model of Stoneley wave energy；
Step 4, Stoneley wave energy correction is carried out to individual well according to the calibration model of formation, and passes through Stoneley wave energy
Attenuation rate carries out distinguishing validity to reservoir, and (foundation of differentiation is: Stoneley wave energy attenuation after calibration is dropped compared with compacted zone
Low 50%, it is believed that reservoir is effective reservoir), so that the development for the reservoir later period provides important evidence.
It is as shown in table 1 that different the surveyed dipole sonics of instrument extract Stoneley wave energy normalized table.
Table 1
In a preferred embodiment, a fine and close cream rock is chosen as index bed, with the Stoneley wave value pair of index bed
All well Stoneley wave energy in work area do normalized, and the Stoneley wave value after normalization is located at same codomain in compacted zone section
Section.
In a preferred embodiment, using the enlarging rate of work area drilled well limestone section with Stoneley wave energy attenuation amount
Establish the wellbore effect plate of Stoneley wave.
In a preferred embodiment, Stoneley wave energy value generally has exponent relation with enlarging rate, Stoneley wave value
Exponentially decay with the increase of enlarging rate；
It chooses the biggish well data of enlarging rate and establishes work area Stoneley wave energy borehole correction charts, updating formula are as follows:
Y=297.5e-0.024x R2=0.8883
Then Stoneley wave correcting value: ST corrects=297.5 (1-e-0.0024*ΔCAL)
Δ CAL: enlarging rate.
In a preferred embodiment, full well section wellbore is done to the Stoneley wave energy after normalization using correcting plate to mend
Repay correction.
In a preferred embodiment, for the western four gas reservoir application Stoneley wave energy wellbore compensation correction method of thunder in river.
Evaluation carbonate reservoir permeability mainly utilizes core analysis permeability, conventional logging permeability, stone at present
Sharp wave permeability, nuclear magnetic resonance permeability etc..Wherein Stoneley wave is only related with the fluid flowing at the borehole wall, is that one kind directly has
The infiltrative method of the evaluation of effect.Changed by the Stoneley wave time difference that multi-pole array acoustic logging obtains different with energy attenuation
It is often mainly related with lithology, in-place permeability.When Stoneley wave passes through permeable formation, centre frequency can be moved to low frequency
Dynamic, the propagation time also will appear delay.With infiltrative increase, this frequency shift (FS) and time delay also be will increase, in conjunction with
The attenuation analysis of Stoneley wave, and then evaluate the infiltrative quality of carbonate reservoir.According to the research achievement of forefathers come
It sees, party's law technology is mainly used in the stratum of wellbore stability, and the four serious stratum of hole collapse of thunder western for river, method has
Effect property needs further to be researched and analysed.
The western four pars infrasegmentalis borehole environment of thunder in river is preferable, develops the compacted zone of big section gypsum and Yun Yan alternating layers, same well, top
The limestone and lower part selenolite Stoneley wave energy value in portion are not much different.Think Stoneley wave energy by Lithologic Effects compared with
It is small, but the Stoneley wave capacity volume variance that the different collected dipole sonics of logger extract is larger (differing several orders of magnitude).
Therefore, it is necessary first to which place is normalized in the Stoneley wave energy extracted to the dipole sonic of different apparatus measures
Reason chooses the thicker fine and close cream rock of the lower part Lei Si thickness as index bed (the Stoneley wave energy value difference of same instruments measurement
It is smaller), normalized is done to all well Stoneley wave energy in work area with the Stoneley wave value of index bed, the stone after normalization
Sharp wave number is located at same codomain section in compacted zone section, is shown in Table 1.
Lei Si develops two sets of compact limestones, expanding degree of the different wells in compact limestone section between top and upper and lower reservoir
It is not quite similar, it is also different to the influence degree of Stoneley wave, in PZ11 well, YS1 well, PZ113 well, PZ115 well, W1 well enlarging rate
Variation range is larger (0-70%), and exponential relationship is relatively obvious, and Fig. 1 is that the energy attenuation of PZ115 well Stoneley wave and wellbore are expanding
The relational graph of rate, Y1 well and M1 well enlarging rate change smaller (0-20%), and exponential relationship is unobvious.Fig. 2 is M1 well Stoneley wave
The relational graph of energy attenuation and wellbore enlarging rate.
Secondly, establishing Stoneley wave with Stoneley wave energy attenuation amount using the enlarging rate of work area drilled well limestone section
Wellbore effect plate, as shown in Figure 3.As seen from the figure, Stoneley wave energy value generally has exponent relation with enlarging rate, stone benefit
Wave number is exponentially decayed with the increase of enlarging rate,
It chooses the biggish well data of enlarging rate and establishes work area Stoneley wave energy borehole correction charts as shown in figure 3, correction
Formula are as follows:
Y=297.5e-0.024x R2=0.8883
Then Stoneley wave correcting value: ST corrects=297.5 (1-e-0.0024*ΔCAL)
Δ CAL: enlarging rate
It is corrected finally, doing full well section borehole compensation to the Stoneley wave energy after normalization using correcting plate.
According to the difference of compacted zone and effective reservoir on Stoneley wave energy, Stoneley wave attenuation amplitude information is introduced,
Using the validity of attenuation amplitude identification reservoir, the RESERVOIR RECOGNITION standard based on Stoneley wave energy attenuation is established.This method is first
The Stoneley wave capacity volume variance for analyzing different apparatus measures is first passed through, normalized is done to four Stoneley wave energy of the western thunder in river；
Secondly, the expanding influence to the decaying of Stoneley wave energy amplitude of analysis；Stoneley wave energy compensating plate is established, finally according to school
Positive plate compensates correction to four sections of Stoneley wave energy of the western thunder in river, differentiates again to effective reservoir, coincidence rate compared with
It is high.
This method passes through the Stoneley wave capacity volume variance for analyzing different apparatus measures first, to four Stoneley wave energy of the western thunder in river
Amount does normalized；Secondly, the expanding influence to the decaying of Stoneley wave energy amplitude of analysis；Establish Stoneley wave energy compensating
Plate, the applicability analysis of last the method for developing, the reliability of verification method.Fig. 4 the 9th is YS1 well Stoneley wave energy
Figure, as seen from the figure and since by wellbore effect, for Stoneley wave energy at 5744-5754 meters, 5790-5810 meters of decaying are bright before correcting
It is aobvious, it is easy to be mistaken for reservoir.Tenth is Stoneley wave energy diagram after correction, at 5744-5754 meters, 5790-5810 meter Cheng Gao
Value tag judges that stratum permeability is poor, is invalid reservoir, and it is non-reservoir, this after correction that the lithologic analysis section, which is compact limestone,
Tonneau wave energy data can more react stratum real information.Therefore, the present invention, also can more actual response under severe borehole condition
Formation information.
The key point of the invention patent is to be built under severe borehole condition using the Stoneley wave energy datum of non-Reservoir Section
Relationship between vertical enlarging rate and Stoneley wave energy attenuation, establishes the expanding influence calibration model of wellbore of Stoneley wave, will
The model is applied in the research all wells in area, is reduced the primitive attribute of Stoneley wave, is played very to the distinguishing validity of reservoir
Good effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is noted that all
Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention should be included in guarantor of the invention
Within the scope of shield.
Claims (5)
1. a kind of method of Stoneley wave energy compensating correction, which comprises the following steps:
Step 1, the factor of analyzing influence Stoneley wave energy value；
Step 2, the Stoneley wave energy extracted to the dipole sonic of different apparatus measures is normalized；
Step 3, fine and close section enlarging rate is established using drilled well limestone segment data -- Stoneley wave energy cross plot；Determine stone
Sharp wave energy calibration model；
Step 4, Stoneley wave energy correction is carried out to individual well according to the calibration model of formation, and passes through Stoneley wave energy attenuation
Rate carries out distinguishing validity to reservoir.
2. a kind of method of Stoneley wave energy compensating correction according to claim 1, it is characterised in that: choose a cause
Mi Gaoyan does normalized to all well Stoneley wave energy in work area as index bed, with the Stoneley wave value of index bed, returns
Stoneley wave value after one change is located at same codomain section in compacted zone section.
3. a kind of method of Stoneley wave energy compensating correction according to claim 1, it is characterised in that: using work area
The enlarging rate of drilled well limestone section establishes the wellbore effect plate of Stoneley wave with Stoneley wave energy attenuation amount.
4. a kind of method of Stoneley wave energy compensating correction according to claim 1 to 3, it is characterised in that: stone
Sharp wave energy magnitude generally has exponent relation with enlarging rate, and Stoneley wave value exponentially decays with the increase of enlarging rate；
It chooses the biggish well data of enlarging rate and establishes work area Stoneley wave energy borehole correction charts, updating formula are as follows:
Y=297.5e-0.024x R2=0.8883
Then Stoneley wave correcting value: ST corrects=297.5 (1-e-0.0024*ΔCAL)
Δ CAL: enlarging rate.
5. a kind of method of Stoneley wave energy compensating correction according to claim 4, it is characterised in that: utilize correction chart
Version is done full well section borehole compensation to the Stoneley wave energy after normalization and is corrected.
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Cited By (3)
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| CN112228046A (en) * | 2020-11-18 | 2021-01-15 | 中国石油天然气集团有限公司 | While-drilling ultrasonic borehole diameter data correction method |
| CN113672840A (en) * | 2020-05-15 | 2021-11-19 | 中国石油天然气股份有限公司 | Stoneley wave attenuation extraction method and device |
| CN113884580A (en) * | 2020-07-02 | 2022-01-04 | 中国石油天然气股份有限公司 | Method and device for extracting Stoneley wave amplitude of shock tube experiment |
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| CN112228046B (en) * | 2020-11-18 | 2024-04-26 | 中国石油天然气集团有限公司 | Ultrasonic well diameter data correction method while drilling |
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