CN106958443A - A kind of bearing calibration of carbon/oxygen log mud filtrate invasion influence factor and system - Google Patents
A kind of bearing calibration of carbon/oxygen log mud filtrate invasion influence factor and system Download PDFInfo
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- CN106958443A CN106958443A CN201710301023.XA CN201710301023A CN106958443A CN 106958443 A CN106958443 A CN 106958443A CN 201710301023 A CN201710301023 A CN 201710301023A CN 106958443 A CN106958443 A CN 106958443A
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- carbon
- oxygen
- ratio value
- oxygen ratio
- log
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 152
- 239000001301 oxygen Substances 0.000 title claims abstract description 152
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 68
- 239000000706 filtrate Substances 0.000 title claims abstract description 52
- 230000009545 invasion Effects 0.000 title claims abstract description 52
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims abstract 25
- 238000000342 Monte Carlo simulation Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 17
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 230000001419 dependent effect Effects 0.000 claims description 10
- 230000001186 cumulative effect Effects 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 43
- 230000005251 gamma ray Effects 0.000 description 6
- 239000004568 cement Substances 0.000 description 3
- 239000008398 formation water Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000704 physical effect Effects 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
- 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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- 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 And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of bearing calibration of carbon/oxygen log mud filtrate invasion influence factor and system, by setting lattice cell card, curved surface card, Material card carries out Monte Carlo simulation, simulate setting ground environment, the corresponding carbon-to-oxygen ratio value of Different porosities under borehole environment during mud filtrate invasion, it is fitted porosity and the relation curve of carbon-to-oxygen ratio value, conclude porosity and the functional relation of carbon-to-oxygen ratio value, the formation carbon oxygen ratio actually measured in carbon/oxygen log is corrected using volume-based model, for mud filtrate invasion in carbon/oxygen log, this influence factor is corrected, so that the carbon-to-oxygen ratio value of actual measurement is more accurate, eliminate interference of the mud filtrate invasion to the carbon-to-oxygen ratio value of measurement.
Description
Technical field
The present invention relates to carbon/oxygen log field, more particularly, to a kind of carbon/oxygen log mud filtrate invasion influence factor
Bearing calibration and system.
Background technology
Can be to various tubing strings (oil pipe, screen casing, sleeve pipe) be entered under well, in order to realize in sleeve pipe in the production in oil field
Parameters of the borehole measurement into stratum, since 1960s, researcher has just carried out series of theories and instrument
The R＆D work of device.The well logging through casing instrument that early stage occurs mainly has thermal-neutron lifetime and carbon/oxygen log.
Carbon/oxygen log is to utilize pulsed neutron source to the high energy fast burst that stratum emitted energy is 14MeV, difference
The gamma ray released when with fast neutron inelastic scattering occurs for atomic nucleus in measurement stratum, and during atom nuclear capture thermal neutron
The gamma ray of releasing, the inelastic scattering gamma ray that different atomic nucleus is produced is different with the energy of capture gamma ray,
Record the inelastic scattering gamma ray and capture gamma ray of these different-energies, it is possible to analyze the various elements in stratum
And its content.
The major advantage of carbon/oxygen log is to penetrate tubular column structure, cement sheath and the various members in direct measurement stratum
Element, is not influenceed by formation water salinity, and when formation water salinity and larger injected water salinity difference, this method has bright
Aobvious advantage, when being measured in high porosity stratum, application effect is good, and solving current electrical log can't
The problem of reservoir saturation degree is evaluated in cased well, neutron life time log is compensate for again in low formation water salinity area measure
The deficiency of effect difference.The information such as physical property, lithology, oiliness and the effective thickness on stratum are provided, underground gas, oil, water can also be provided
Dynamic, the parameter such as production capacity, remaining oil saturation, productivity index.
High energy fast neutron, which needs to penetrate oil pipe, sleeve pipe, oil jacket annular space, cement sheath, during due to carbon-to-oxygen ratio well logging through casing just arrives
Up to stratum, it is also possible to being influenceed by mud filtrate invasion in stratum, therefore measurement response contain non-stratum information and
The information on non-genuine stratum., it is necessary to which these major influence factors in influenceing are entered in C/O Log processing procedure
Row correction, to improve the precision of remaining oil saturation calculating.At present, also lack on the market and invaded for drilling fluid in carbon/oxygen log
Enter the bearing calibration and measure of this influence factor.
The content of the invention
It is an object of the invention to overcome above-mentioned technical deficiency, a kind of carbon/oxygen log mud filtrate invasion influence factor is proposed
Bearing calibration and system, solve above-mentioned technical problem of the prior art.
To reach above-mentioned technical purpose, technical scheme provide a kind of carbon/oxygen log mud filtrate invasion influence because
The bearing calibration of element, including：
S1, setting lattice cell card, curved surface card, Material card, set up Monte Carlo simulation model；
S2, progress Monte Carlo simulation, simulate different holes during mud filtrate invasion under setting ground environment, borehole environment
The corresponding carbon-to-oxygen ratio value of porosity, is respectively independent variable and dependent variable with porosity and carbon-to-oxygen ratio value, is fitted porosity and carbon-to-oxygen ratio
The relation curve of value, concludes porosity and the functional relation of carbon-to-oxygen ratio value；
The porosity and the functional relation of carbon-to-oxygen ratio value concluded in S3, checking S2；
Whether S4, the functional relation for judging porosity and carbon-to-oxygen ratio value are linear relationships, if linear relationship, are then used
The mode of volume-based model corrects the formation carbon oxygen ratio actually measured in carbon/oxygen log.
Technical scheme also provides a kind of correction system of carbon/oxygen log mud filtrate invasion influence factor, bag
Include：
Model building module：Lattice cell card, curved surface card, Material card are set, Monte Carlo simulation model is set up；
Monte Carlo simulation module：Monte Carlo simulation is carried out, drilling fluid under setting ground environment, borehole environment is simulated
The corresponding carbon-to-oxygen ratio value of Different porosities during intrusion, is respectively independent variable and dependent variable, fitting with porosity and carbon-to-oxygen ratio value
Porosity and the relation curve of carbon-to-oxygen ratio value, conclude porosity and the functional relation of carbon-to-oxygen ratio value；
Authentication module：The porosity and the functional relation of carbon-to-oxygen ratio value concluded in checking Monte Carlo simulation module；
Correction module：Judge whether porosity and the functional relation of carbon-to-oxygen ratio value are linear relationships, if linear relationship,
The formation carbon oxygen ratio actually measured in carbon/oxygen log is then corrected by the way of volume-based model.
Compared with prior art, beneficial effects of the present invention include：Carried out by setting lattice cell card, curved surface card, Material card
Monte Carlo simulation, simulates the corresponding carbon oxygen of Different porosities during mud filtrate invasion under setting ground environment, borehole environment
Ratio, fitting porosity and the relation curve of carbon-to-oxygen ratio value, conclude porosity and the functional relation of carbon-to-oxygen ratio value, utilize volume mould
Type is corrected to the formation carbon oxygen ratio actually measured in carbon/oxygen log, for mud filtrate invasion in carbon/oxygen log this
Influence factor is corrected so that the carbon-to-oxygen ratio value of actual measurement is more accurate, eliminates carbon of the mud filtrate invasion to measurement
The interference of oxygen ratio.
Brief description of the drawings
Fig. 1 is a kind of bearing calibration flow chart for carbon/oxygen log mud filtrate invasion influence factor that the present invention is provided；
Fig. 2 is a kind of correction system architecture diagram for carbon/oxygen log mud filtrate invasion influence factor that the present invention is provided；
Fig. 3 is the structured flowchart of correction module in Fig. 2.
In accompanying drawing：1st, the correction system of carbon/oxygen log mud filtrate invasion influence factor, 11, model building module, 12, cover
Special Carlow analog module, 13, authentication module, 14, correction module, 141, reference lamina determining unit, 142, intrusion volume calculate single
Member, 143, actual measuring unit, 144, correction unit.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The invention provides a kind of bearing calibration of carbon/oxygen log mud filtrate invasion influence factor, including：
S1, setting lattice cell card, curved surface card, Material card, set up Monte Carlo simulation model；
S2, progress Monte Carlo simulation, simulate different holes during mud filtrate invasion under setting ground environment, borehole environment
The corresponding carbon-to-oxygen ratio value of porosity, is respectively independent variable and dependent variable with porosity and carbon-to-oxygen ratio value, is fitted porosity and carbon-to-oxygen ratio
The relation curve of value, concludes porosity and the functional relation of carbon-to-oxygen ratio value；
The porosity and the functional relation of carbon-to-oxygen ratio value concluded in S3, checking S2；
Whether S4, the functional relation for judging porosity and carbon-to-oxygen ratio value are linear relationships, if linear relationship, are then used
The mode of volume-based model corrects the formation carbon oxygen ratio actually measured in carbon/oxygen log.
In the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor of the present invention, step S1：
Lattice cell card describes the geometric units of stratum cross section during carbon/oxygen log, and stratum cross section includes stratum, measurement and set
The cross section that standby, borehole environment is constituted, borehole environment includes：Cement sheath, tubing string (sleeve pipe, oil pipe, screen casing), wellbore fluid (oil,
Water), curved surface card describes the curved surface of lattice cell, and Material card describes the elemental constituent of stratum cross section, and elemental constituent includes the kind of element
Class and every kind of element proportion.
In the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor of the present invention, step S2：
Lattice cell card, curved surface card, the different parameters of Material card set the different ground environment of correspondence, borehole environment.
In the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor of the present invention, step S3：
Ground environment, the borehole environment of setting are changed, Monte Carlo simulation is carried out again, the stratum ring after changing is simulated
The corresponding carbon-to-oxygen ratio value of Different porosities under border, borehole environment during mud filtrate invasion, be respectively with carbon-to-oxygen ratio value with porosity
The porosity and carbon-to-oxygen ratio value concluded in independent variable and dependent variable, fitting porosity and the relation curve of carbon-to-oxygen ratio value, checking S2
Functional relation.
Volume mould is used in the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor of the present invention, step S4
The step of mode of type corrects the formation carbon oxygen ratio actually measured in carbon/oxygen log includes：
S41, pure water layer during carbon/oxygen log in the stratum of carbon-to-oxygen ratio value to be corrected is determined as reference lamina, record
The carbon-to-oxygen ratio value C/O of pure water layerWater；
The cumulative volume Z on stratum of carbon-to-oxygen ratio value to be corrected and invading for mud filtrate invasion stratum when S42, calculating carbon/oxygen log
Enter volume Z1, then subtract the unimpinged volume Z that intrusion volume obtains the unimpinged stratum of drilling fluid using cumulative volume2, wherein Z2=
Z-Z1；
S43, utilize the carbon-to-oxygen ratio value C/O in carbon/oxygen log measurement stratumSurvey；
Carbon-to-oxygen ratio value C/O in S44, the stratum measured carbon/oxygen logSurveyIt is corrected：By the C/O of acquisitionWater、Z1、Z2、
C/OSurveyVolume-based model formula is substituted into, formation carbon oxygen ratio C/O after correction is calculatedCorrection, volume-based model formula is：
The present invention also provides a kind of correction system 1 of carbon/oxygen log mud filtrate invasion influence factor, including：
Model building module 11：Lattice cell card, curved surface card, Material card are set, Monte Carlo simulation model is set up；
Monte Carlo simulation module 12：Monte Carlo simulation is carried out, drilling well under setting ground environment, borehole environment is simulated
The corresponding carbon-to-oxygen ratio value of Different porosities when liquid is invaded, is respectively independent variable and dependent variable, plan with porosity and carbon-to-oxygen ratio value
Porosity and the relation curve of carbon-to-oxygen ratio value are closed, porosity and the functional relation of carbon-to-oxygen ratio value is concluded；
Authentication module 13：The porosity and the functional relation of carbon-to-oxygen ratio value concluded in checking Monte Carlo simulation module；
Correction module 14：Judge whether porosity and the functional relation of carbon-to-oxygen ratio value are linear relationships, if linear close
System, then correct the formation carbon oxygen ratio actually measured in carbon/oxygen log by the way of volume-based model.
In the correction system 1 of carbon/oxygen log mud filtrate invasion influence factor of the present invention, model building module 11：
Lattice cell card describes the geometric units of stratum cross section during carbon/oxygen log, and stratum cross section includes stratum, measurement and set
The cross section that standby, borehole environment is constituted, curved surface card describes the curved surface of lattice cell, and Material card describes the elemental constituent of stratum cross section.
The correction system 1 of carbon/oxygen log mud filtrate invasion influence factor of the present invention, Monte Carlo simulation module
In 12：
Lattice cell card, curved surface card, the different parameters of Material card set the different ground environment of correspondence, borehole environment.
The correction system 1 of carbon/oxygen log mud filtrate invasion influence factor of the present invention, correction module 14 includes：
Reference lamina determining unit 141：Determine pure water layer during carbon/oxygen log in the stratum of carbon-to-oxygen ratio value to be corrected
It is used as reference lamina, the carbon-to-oxygen ratio value C/O of record pure water layerWater；
Invade volume computing unit 142：Calculate cumulative volume Z and the mud filtrate invasion stratum on the stratum of carbon-to-oxygen ratio value to be corrected
Intrusion volume Z1, then subtract the unimpinged volume Z that intrusion volume obtains the unimpinged stratum of drilling fluid using cumulative volume2, wherein
Z2=Z-Z1；
Actual measuring unit 143：Utilize the carbon-to-oxygen ratio value C/O in carbon/oxygen log measurement stratumSurvey；
Correct unit 144：Carbon-to-oxygen ratio value C/O in the stratum measured carbon/oxygen logSurveyIt is corrected, by the C/ of acquisition
OWater、Z1、Z2、C/OSurveyVolume-based model formula is substituted into, formation carbon oxygen ratio C/O after correction is calculatedCorrection, volume-based model formula is：
In the correction system 1 of carbon/oxygen log mud filtrate invasion influence factor of the present invention, authentication module 13：
Ground environment, the borehole environment of setting are changed, Monte Carlo simulation is carried out again, the stratum ring after changing is simulated
The corresponding carbon-to-oxygen ratio value of Different porosities under border, borehole environment during mud filtrate invasion, be respectively with carbon-to-oxygen ratio value with porosity
Concluded in independent variable and dependent variable, fitting porosity and the relation curve of carbon-to-oxygen ratio value, checking Monte Carlo simulation module 12
Porosity and the functional relation of carbon-to-oxygen ratio value.
Compared with prior art, beneficial effects of the present invention include：Carried out by setting lattice cell card, curved surface card, Material card
Monte Carlo simulation, simulates the corresponding carbon oxygen of Different porosities during mud filtrate invasion under setting ground environment, borehole environment
Ratio, fitting porosity and the relation curve of carbon-to-oxygen ratio value, conclude porosity and the functional relation of carbon-to-oxygen ratio value, utilize volume mould
Type is corrected to the formation carbon oxygen ratio actually measured in carbon/oxygen log, for mud filtrate invasion in carbon/oxygen log this
Influence factor is corrected so that the carbon-to-oxygen ratio value of actual measurement is more accurate, eliminates carbon of the mud filtrate invasion to measurement
The interference of oxygen ratio.
The embodiment of present invention described above, is not intended to limit the scope of the present invention..Any basis
Various other corresponding changes and deformation that the technical concept of the present invention is made, should be included in the guarantor of the claims in the present invention
In the range of shield.
Claims (10)
1. a kind of bearing calibration of carbon/oxygen log mud filtrate invasion influence factor, it is characterised in that including step：
S1, setting lattice cell card, curved surface card, Material card, set up Monte Carlo simulation model；
S2, progress Monte Carlo simulation, simulate Different porosities during mud filtrate invasion under setting ground environment, borehole environment
Corresponding carbon-to-oxygen ratio value, is respectively independent variable and dependent variable with the porosity and the carbon-to-oxygen ratio value, is fitted the porosity
With the relation curve of the carbon-to-oxygen ratio value, the porosity and the functional relation of the carbon-to-oxygen ratio value are concluded；
The porosity and the functional relation of the carbon-to-oxygen ratio value concluded in S3, checking S2；
Whether S4, the functional relation for judging the porosity and the carbon-to-oxygen ratio value are linear relationships, if linear relationship, then
The formation carbon oxygen ratio actually measured in carbon/oxygen log is corrected by the way of volume-based model.
2. the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 1, it is characterised in that step
In S1：
The lattice cell card describes the geometric units of stratum cross section during carbon/oxygen log, and the stratum cross section includes stratum, surveyed
The cross section that equipment, borehole environment are constituted is measured, the curved surface card describes the curved surface of lattice cell, and the Material card describes stratum cross section
Elemental constituent.
3. the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 1, it is characterised in that step
In S2：
The lattice cell card, the curved surface card, the different parameters of the Material card set the different ground environment of correspondence, well ring
Border.
4. the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 1, it is characterised in that step
Included in S4 the step of the formation carbon oxygen ratio actually measured in carbon/oxygen log is corrected by the way of volume-based model：
S41, determine that pure water layer during carbon/oxygen log in the stratum of carbon-to-oxygen ratio value to be corrected as reference lamina, records pure water
The carbon-to-oxygen ratio value C/O of layerWater；
S42, the cumulative volume Z and the intrusion volume Z on mud filtrate invasion stratum on the stratum of calculating carbon-to-oxygen ratio value to be corrected1, then utilize
Cumulative volume subtracts the unimpinged volume Z that intrusion volume obtains the unimpinged stratum of drilling fluid2, wherein Z2=Z-Z1；
S43, utilize the carbon-to-oxygen ratio value C/O in carbon/oxygen log measurement stratumSurvey；
Carbon-to-oxygen ratio value C/O in S44, the stratum measured carbon/oxygen logSurveyIt is corrected：By the C/O of acquisitionWater、Z1、Z2、C/OSurvey
Volume-based model formula is substituted into, formation carbon oxygen ratio C/O after correction is calculatedCorrection, volume-based model formula is：
5. the bearing calibration of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 1, it is characterised in that step
In S3：
Change setting ground environment, borehole environment, Monte Carlo simulation is carried out again, simulate change after ground environment,
The corresponding carbon-to-oxygen ratio value of Different porosities under borehole environment during mud filtrate invasion, with the porosity and the carbon-to-oxygen ratio value point
Not Wei independent variable and dependent variable, be fitted concluded in the porosity and the relation curve of the carbon-to-oxygen ratio value, checking S2 described
Porosity and the functional relation of the carbon-to-oxygen ratio value.
6. a kind of correction system of carbon/oxygen log mud filtrate invasion influence factor, it is characterised in that including：
Model building module：The lattice cell card, the curved surface card, the Material card are set, Monte Carlo simulation model is set up；
Monte Carlo simulation module：Monte Carlo simulation is carried out, mud filtrate invasion under setting ground environment, borehole environment is simulated
When the corresponding carbon-to-oxygen ratio value of Different porosities, be respectively independent variable and dependent variable with the porosity and the carbon-to-oxygen ratio value,
The relation curve of the porosity and the carbon-to-oxygen ratio value is fitted, the porosity is concluded and the function of the carbon-to-oxygen ratio value is closed
System；
Authentication module：The porosity and the functional relation of the carbon-to-oxygen ratio value concluded in checking Monte Carlo simulation module；
Correction module：Judge whether the porosity and the functional relation of the carbon-to-oxygen ratio value are linear relationships, if linearly
Relation, then correct the formation carbon oxygen ratio actually measured in carbon/oxygen log by the way of the volume-based model.
7. the correction system of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 6, it is characterised in that model
Set up in module：
The lattice cell card describes the geometric units of stratum cross section during carbon/oxygen log, and stratum cross section includes stratum, measurement and set
The cross section that standby, borehole environment is constituted, the curved surface card describes the curved surface of lattice cell, and the Material card describes the member of stratum cross section
Plain component.
8. the correction system of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 6, it is characterised in that cover special
In the analog module of Carlow：
The lattice cell card, the curved surface card, the different parameters of the Material card set the different ground environment of correspondence, well ring
Border.
9. the correction system of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 6, it is characterised in that correction
Module includes：
Reference lamina determining unit：Determine pure water layer during carbon/oxygen log in the stratum of carbon-to-oxygen ratio value to be corrected as mark
Layer, the carbon-to-oxygen ratio value C/O of record pure water layerWater；
Invade volume computing unit：Calculate the cumulative volume Z on the stratum of carbon-to-oxygen ratio value to be corrected and the intrusion on mud filtrate invasion stratum
Volume Z1, then subtract the unimpinged volume Z that intrusion volume obtains the unimpinged stratum of drilling fluid using cumulative volume2, wherein Z2=Z-
Z1；
Actual measuring unit：Utilize the carbon-to-oxygen ratio value C/O in carbon/oxygen log measurement stratumSurvey；
Correct unit：Carbon-to-oxygen ratio value C/O in the stratum measured carbon/oxygen logSurveyIt is corrected, by the C/O of acquisitionWater、Z1、
Z2、C/OSurveyVolume-based model formula is substituted into, formation carbon oxygen ratio C/O after correction is calculatedCorrection, volume-based model formula is：
10. the correction system of carbon/oxygen log mud filtrate invasion influence factor as claimed in claim 6, it is characterised in that test
Demonstrate,prove in module：
Change setting ground environment, borehole environment, Monte Carlo simulation is carried out again, simulate change after ground environment,
The corresponding carbon-to-oxygen ratio value of Different porosities under borehole environment during mud filtrate invasion, is respectively from change with porosity and carbon-to-oxygen ratio value
The porosity concluded in amount and dependent variable, fitting porosity and the relation curve of carbon-to-oxygen ratio value, checking Monte Carlo simulation module
With the functional relation of carbon-to-oxygen ratio value.
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| CN114647912A (en) * | 2022-02-28 | 2022-06-21 | 电子科技大学 | Through-casing cement invasion model establishing method and through-casing stratum three-porosity measuring method |
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