CN109736791A - Second interpretation technical method towards reservoir in a kind of oil and gas development - Google Patents
Second interpretation technical method towards reservoir in a kind of oil and gas development Download PDFInfo
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- CN109736791A CN109736791A CN201910002332.6A CN201910002332A CN109736791A CN 109736791 A CN109736791 A CN 109736791A CN 201910002332 A CN201910002332 A CN 201910002332A CN 109736791 A CN109736791 A CN 109736791A
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Abstract
The invention discloses the second interpretation technical methods in a kind of oil and gas development towards reservoir, establish low frequency model, the seismic inversion for carrying out Log-constrained and efficiency of inverse process analysis including opening up high frequency benefit low frequency.The beneficial effects of the present invention are: demarcating to obtain a wavelet with seismic trace near well with high correlation by fine reservoir prediction, low frequency model is established according to log trend model, stratigraphic framework model is established using fine structural interpretation achievement, reasonable interpolation and extrapolation are carried out to log using constraint and trend on the basis of the model, reach and opens up low frequency, mend the purpose of high boost seismic data resolution, seismic data is converted to an impedance body with single well data with preferable relativity using wavelet, it obtains after impedance body from point, line, face multi-angle is analyzed, specify Different Strata, reservoir impedance reflection feature, utilize impedance body, carry out the second interpretation towards reservoir for target series of strata, implement reservoir spatial distribution characteristics.
Description
Technical field
The present invention relates to a kind of interpretation technique method thrustor, towards the secondary of reservoir in specially a kind of oil and gas development
Interpretation technique method belongs to oil gas development technology field.
Background technique
With the development of oil-gas exploration technology and going deep into for research work, common seismic data is difficult to meet lithological pool
Forecast demand.Lithological pool mainly uses the technologies such as seismic attributes slice, spectrum analysis to be predicted at present, but since river moves
It moves and swings frequently, predict that achievement and the practical Distribution Characteristics difference in river are larger.
This method obtains a high-resolution impedance body by opening up high frequency, mending low frequency.Drilled well is recycled to cut open with impedance
Face, plane carry out the second interpretation towards reservoir in conjunction with section, bis- village oil field village wellblock 11-13 this method Yang obtained compared with
The technology can be more from section, plane, individual well for the technologies such as good application, relatively earthquake divider ratio evidence, seismic properties prediction
Aspect accurately identifies the reflectance signature of advantage reservoir, so that the spatial feature in meandering stream river be more accurately predicted, is
The key technology for improving drilling success, realizing lithologic reservoir Efficient Development.
Summary of the invention
The object of the invention is that provide in a kind of oil and gas development towards the secondary of reservoir to solve the above-mentioned problems
Interpretation technique method.
The present invention is through the following technical solutions to achieve the above objectives: the second interpretation towards reservoir in a kind of oil and gas development
Technical method includes the following steps
Step A: it opens up high frequency benefit low frequency and establishes low frequency model, establish Stratigraphic framework using the achievement of fine structural interpretation, benefit
Constraint is carried out with the overall trend of log and establishes low frequency model, expands seismic data using the internal algorithm of Jason software
The 80Hz of middle shortage radio-frequency component below, to achieve the purpose that opening up high frequency mends low frequency；
Step B: carrying out the seismic inversion of Log-constrained, passes through fine reservoir prediction available one and seismic trace near well
Seismic wavelet with high correlation, utilizes formula:
Deconvolution is carried out, seismic data S (t) is finally converted into one using seismic wavelet f (t) has with well-log information
The reflection coefficient sequence R (t) of preferable correlation；
Wherein, f (t) is synthetic seismogram；S (t) is the waveform of seismic wavelet；R (t) is the reflection system of seismic profile
Number；
Step C: efficiency of inverse process analysis after obtaining impedance body, carries out efficiency of inverse process analysis to the impedance body, first from mistake
The typical impedance section of emphasis well and the lithological profile of individual well find rule, then in the sky according to reservoir and structure interpretation layer position
Between relationship, carry out reasonable seismic attribute abstraction, from planar observation extract attribute and fixed well correlation, finally before satisfaction
Individual well reflectance signature is considered using impedance profile and impedance plane attribute synthesis under the premise of two, is opened by hand by impedance data
Exhibition reservoir is carefully portrayed, and the second interpretation work towards reservoir is completed.
Preferably, in order to establish low frequency model according to log trend model, in the step A, by fine
Horizon calibration obtains a wavelet with seismic trace near well with high correlation.
Preferably, it in order to achieve the purpose that open up low frequency, mend high boost seismic data resolution, in the step A, utilizes
Fine structural interpretation achievement establishes stratigraphic framework model.
Preferably, in order to determine the impedance plane and section response characteristic of target series of strata, in the step B, utilization is above-mentioned
Seismic data is converted to an impedance body with single well data with preferable relativity by wavelet.
Preferably, in order to clear Different Strata, reservoir impedance reflection feature, in the step C, impedance body is being obtained
It is analyzed later from point, line, surface multi-angle.
Preferably, in order to be substantially improved reservoir prediction precision can it is qualitative to advantage reservoir whereby, quantitatively carry out two
Secondary explanation in the step C, using impedance body, carries out the second interpretation towards reservoir for target series of strata, implements reservoir space
Distribution Characteristics.
The beneficial effects of the present invention are: the second interpretation technical method design in the oil and gas development towards reservoir is rationally, step
In rapid A, a wavelet with seismic trace near well with high correlation is obtained by fine reservoir prediction, it can be bent according to well logging
Line trend model establishes low frequency model, in step A, stratigraphic framework model is established using fine structural interpretation achievement, in the model
On the basis of using constraint and trend reasonable interpolation and extrapolation are carried out to log, open up low frequency to reach, mend high frequency and mention
The purpose for rising seismic data resolution, in step B, seismic data is converted to one using above-mentioned wavelet has with single well data
The impedance body of preferable relativity is compared using individual well lithology curve and impedance profile, determine target series of strata impedance plane and
Section response characteristic in step C, is analyzed after obtaining impedance body from point, line, surface multi-angle, can it is clear differently
Layer, reservoir impedance reflection feature in step C, using impedance body, are carried out the second interpretation towards reservoir for target series of strata, are fallen
Real reservoir spatial distribution characteristics, can be substantially improved reservoir prediction precision can it is qualitative to advantage reservoir whereby, quantitatively carry out two
Secondary explanation, and then accurately implement the spatial feature of geologic body.
Detailed description of the invention
Fig. 1 is effective information distribution figure in structure of the invention seismic data；
Fig. 2 is that structure of the invention utilizes low-frequency information elimination secondary lobe promotion sand body boundary carving effect figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~2, the second interpretation technical method towards reservoir in a kind of oil and gas development includes the following steps
Step A: it opens up high frequency benefit low frequency and establishes low frequency model, establish Stratigraphic framework using the achievement of fine structural interpretation, benefit
Constraint is carried out with the overall trend of log and establishes low frequency model, expands seismic data using the internal algorithm of Jason software
The 80Hz of middle shortage radio-frequency component below, to achieve the purpose that opening up high frequency mends low frequency；
Step B: carrying out the seismic inversion of Log-constrained, passes through fine reservoir prediction available one and seismic trace near well
Seismic wavelet with high correlation, utilizes formula:
Deconvolution is carried out, seismic data S (t) is finally converted into one using seismic wavelet f (t) has with well-log information
The reflection coefficient sequence R (t) of preferable correlation；
Wherein, f (t) is synthetic seismogram；S (t) is the waveform of seismic wavelet；R (t) is the reflection system of seismic profile
Number；
Step C: efficiency of inverse process analysis after obtaining impedance body, carries out efficiency of inverse process analysis to the impedance body, first from mistake
The typical impedance section of emphasis well and the lithological profile of individual well find rule, then in the sky according to reservoir and structure interpretation layer position
Between relationship, carry out reasonable seismic attribute abstraction, from planar observation extract attribute and fixed well correlation, finally before satisfaction
Individual well reflectance signature is considered using impedance profile and impedance plane attribute synthesis under the premise of two, is opened by hand by impedance data
Exhibition reservoir is carefully portrayed, and the second interpretation work towards reservoir is completed.
In step A, demarcate to obtain a wavelet with seismic trace near well with high correlation by fine reservoir prediction,
It can establish low frequency model according to log trend model, in the step A, establish stratum using fine structural interpretation achievement
Skeleton Model carries out reasonable interpolation and extrapolation to log using constraint and trend on the basis of the model, to reach
To the purpose opened up low frequency, mend high boost seismic data resolution, in the step B, seismic data is turned using above-mentioned wavelet
Chemical conversion one has the impedance body of preferable relativity with single well data, is compared using individual well lithology curve and impedance profile, really
The impedance plane and section response characteristic for the series of strata that set the goal, it is polygonal from point, line, surface after obtaining impedance body in the step C
Degree is analyzed, and can specify Different Strata, reservoir impedance reflection feature, in the step C, using impedance body, for target
Series of strata carry out the second interpretation towards reservoir, implement reservoir spatial distribution characteristics, reservoir prediction precision can be substantially improved can
It is qualitative to advantage reservoir whereby, quantitatively carry out second interpretation, and then accurately implement the spatial feature of geologic body.
Working principle: when using second interpretation technical method in the oil and gas development towards reservoir, first with construction
Interpretation results (primary to explain), establish low frequency model in conjunction with log trend model, to well logging in the background of low frequency model
Curve, which push away in reasonable, mends low frequency with extrapolation to achieve the purpose that open up high frequency.Then known drilled well is utilized, it is clear
The variation of seismic response features caused by target zone different lithology, physical property, change of fluid, flat cutting, which combines, to be carried out towards the secondary of reservoir
It explains work, is finally completed the meticulous depiction of fluvial depositional reservoir.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. the second interpretation technical method in a kind of oil and gas development towards reservoir, it is characterised in that: include the following steps
Step A: it opens up high frequency benefit low frequency and establishes low frequency model, establish Stratigraphic framework using the achievement of fine structural interpretation, utilize survey
The overall trend of well curve carries out constraint and establishes low frequency model, is expanded in seismic data and is lacked using the internal algorithm of Jason software
Weary 80Hz radio-frequency component below, to achieve the purpose that opening up high frequency mends low frequency；
Step B: carrying out the seismic inversion of Log-constrained, has by fine reservoir prediction available one with seismic trace near well
The seismic wavelet of high correlation, utilizes formula:
Deconvolution is carried out, seismic data S (t) is finally converted into one with well-log information with preferable using seismic wavelet f (t)
The reflection coefficient sequence R (t) of correlation；
Wherein, f (t) is synthetic seismogram；S (t) is the waveform of seismic wavelet；R (t) is the reflection coefficient of seismic profile；
Step C: efficiency of inverse process analysis after obtaining impedance body, carries out efficiency of inverse process analysis to the impedance body, first from emphasis excessively
The typical impedance section of well and the lithological profile of individual well find rule, then close according to the space of reservoir and structure interpretation layer position
System, carries out reasonable seismic attribute abstraction, the correlation of attribute and fixed well is extracted from planar observation, finally two before satisfaction
Under the premise of using impedance profile and impedance plane attribute synthesis consider individual well reflectance signature, carry out storage by hand by impedance data
Layer is carefully portrayed, and the second interpretation work towards reservoir is completed.
2. the second interpretation technical method in a kind of oil and gas development according to claim 1 towards reservoir, it is characterised in that:
In the step A, a wavelet with seismic trace near well with high correlation is obtained by fine reservoir prediction.
3. the second interpretation technical method in a kind of oil and gas development according to claim 1 towards reservoir, it is characterised in that:
In the step A, stratigraphic framework model is established using fine structural interpretation achievement.
4. the second interpretation technical method in a kind of oil and gas development according to claim 1 towards reservoir, it is characterised in that:
In the step B, seismic data is converted to an impedance with single well data with preferable relativity using above-mentioned wavelet
Body.
5. the second interpretation technical method in a kind of oil and gas development according to claim 1 towards reservoir, it is characterised in that:
In the step C, analyzed after obtaining impedance body from point, line, surface multi-angle.
6. the second interpretation technical method in a kind of oil and gas development according to claim 1 towards reservoir, it is characterised in that:
In the step C, using impedance body, carries out the second interpretation towards reservoir for target series of strata, it is special to implement reservoir space spread
Sign.
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Cited By (1)
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| CN111060970A (en) * | 2019-12-30 | 2020-04-24 | 恒泰艾普（北京）能源科技研究院有限公司 | Reservoir constrained deconvolution method and application |
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Application publication date: 20190510 |