CN110456415A - A kind of thin RESERVOIR INTERPRETATION method and system of terrestrial facies based on local peaking's frequency - Google Patents
A kind of thin RESERVOIR INTERPRETATION method and system of terrestrial facies based on local peaking's frequency Download PDFInfo
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
- G01V1/306—Analysis for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
- G01V1/307—Analysis for determining seismic attributes, e.g. amplitude, instantaneous phase or frequency, reflection strength or polarity
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Abstract
The invention discloses a kind of thin RESERVOIR INTERPRETATION method and system of terrestrial facies based on local peaking's frequency, belong to seismic exploration technique field, and it is more difficult to thin layer progress meticulous depiction to solve the problems, such as.A kind of thin RESERVOIR INTERPRETATION method of terrestrial facies based on local peaking's frequency, comprising the following steps: seismic data is subjected to Q compensation, is obtained through the compensated seismic data of Q；Generalized S-transform is carried out through the compensated seismic data of Q to described, obtains time-frequency data volume；Obtain the time-frequency data volume local time-frequency peak value it is all corresponding at the time of, determine coating position at the time of all corresponding by local time-frequency peak value.Realize the Explanation Accuracy for improving thin layer.
Description
Technical field
The present invention relates to seismic exploration technique fields, more particularly, to a kind of thin reservoir of the terrestrial facies based on local peaking's frequency
Means of interpretation and system.
Background technique
Increase with the variation and data volume of the time of oil field development, these seismic interpretation achievements and geological knowledge are different
There are contradictions with Practical Project development result for cause and geological knowledge, it is obvious that provide reliable seismic interpretation achievement needs
Seismic interpretation personnel combine the Various types of data of development phase to carry out comprehensive analysis；
And terrestrial lake basin hydrocarbon reservoir is had comparative advantage with clastic rock, reservoir heterogeneity is strong, although development phase well pattern
Density is very high, is only inferred by well data between relationship well and is not known very much still, though and earthquake information has transverse direction and can chase after
The characteristic of track, but the resolution ratio of common seismic data is low, it is difficult to for carrying out meticulous depiction to thin reservoir (thin layer).
Summary of the invention
It is an object of the invention at least overcome a kind of above-mentioned technical deficiency, a kind of land based on local peaking's frequency is proposed
Mutually thin RESERVOIR INTERPRETATION method and system.
On the one hand, the present invention provides a kind of thin RESERVOIR INTERPRETATION method of the terrestrial facies based on local peaking's frequency, including following step
It is rapid:
Seismic data is acquired, seismic data is subjected to Q compensation, is obtained through the compensated seismic data of Q；
Generalized S-transform is carried out through the compensated seismic data of Q to described, obtains time-frequency data volume；
Obtain the time-frequency data volume local time-frequency peak value it is all corresponding at the time of, by local all correspondences of time-frequency peak value
At the time of determine coating position.
Further, described that seismic data is subjected to Q compensation, it obtains specifically including through the compensated seismic data of Q:
Utilize formulaQ compensation is carried out to seismic data, obtains mending through Q
Seismic data S after repayingQ(t), wherein r (τ) is reflection coefficient sequence, aQ(τ, f)=e-πfτQ+iH(πfτ/Q)For the transmission function of Q,
H is the Hilbert transform at the τ moment to frequency f.
Further, generalized S-transform is carried out through the compensated seismic data of Q to described, obtains time-frequency data volume, it is specific to wrap
It includes:
Utilize formulaTo described through the compensated earthquake number of Q
According to generalized S-transform is carried out, time-frequency data volume ST (τ, f) is obtained, wherein λ and q is control generalized S-transform time frequency resolution two
A parameter, λ > 1, q > 1.
Further, obtain the time-frequency data volume local time-frequency peak value it is all corresponding at the time of, specifically include:
The maximum of frequency in time-frequency data volume ST (τ, f) is sought, corresponding time instant τ is then the office of time-frequency data volume at this time
At the time of portion's time-frequency peak value is all corresponding.
On the other hand, the present invention also provides a kind of thin RESERVOIR INTERPRETATION systems of terrestrial facies based on local peaking's frequency, including ground
It shakes data acquisition module, compensating module, time-frequency data volume and obtains module, coating position determining module；
Earthquake data acquisition module is for acquiring seismic data；
Compensating module is used to seismic data carrying out Q compensation, obtains through the compensated seismic data of Q；
Time-frequency data volume obtains module and is used to carry out generalized S-transform through the compensated seismic data of Q to described, obtains time-frequency
Data volume；
At the time of local time-frequency peak value of the coating position determining module for obtaining the time-frequency data volume is all corresponding, by
Local time-frequency peak value determines coating position at the time of all corresponding.
Further, time-frequency data volume obtains module and utilizes formulaIt is right
Seismic data carries out Q compensation, obtains through the compensated seismic data S of QQ(t), wherein r (τ) is reflection coefficient sequence, aQ(τ, f)
=e-πfτQ+iH(πfτ/Q)For the transmission function of Q, H is the Hilbert transform at the τ moment to frequency f.
Further, time-frequency data volume obtains module and utilizes formula
Carry out generalized S-transform through the compensated seismic data of Q to described, obtain time-frequency data volume ST (τ, f), wherein λ and
Q is two parameters for controlling generalized S-transform time frequency resolution, λ > 1, q > 1.
Further, the coating position determining module further includes that local time-frequency peak value corresponds to moment determination unit；
The part time-frequency peak value corresponds to the maximum that moment determination unit seeks frequency in time-frequency data volume ST (τ, f),
At the time of corresponding time instant τ is then corresponding to the local time-frequency peak value of time-frequency data volume at this time.
Compared with prior art, the beneficial effect comprise that making full use of the frequency-response characteristic of thin layer to reflect
The Spatial Variation of thin layer, and then thin layer lengthwise position is analyzed and quantifies, preferably thin layer is explained；
The explanation that thin layer is carried out using the radio-frequency component of local peaking's frequency, can be to a same phase by local peaking's frequency
Thin layer in axis carries out multilayer explanation, effectively prevents only one layer of the explanation in a lineups in conventional stratigraphic interpretation, and
Avoid the later period according to one layer of interpretation horizon carry out slice or when in-migration portray thin layer when string layer phenomenon, to mention
The high Explanation Accuracy of thin layer.
Detailed description of the invention
Fig. 1 is that the process of the thin RESERVOIR INTERPRETATION method of terrestrial facies based on local peaking's frequency described in the embodiment of the present invention 1 is shown
It is intended to；
Fig. 2 is the spectrum diagram of seismic data described in the embodiment of the present invention 1；
Fig. 3 is that the geological layering and Thin Sandbody top surface based on local frequencies peak value described in the embodiment of the present invention 1 are explained
Schematic diagram；
Fig. 4 is 2033 geological layering result schematic diagram of port described in the embodiment of the present invention 1.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
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.
Embodiment 1
The embodiment provides a kind of thin RESERVOIR INTERPRETATION method of terrestrial facies based on local peaking's frequency, including it is following
Step:
Seismic data is acquired, seismic data is subjected to Q (absorption coefficient) compensation, is obtained through the compensated seismic data of Q；
Generalized S-transform is carried out through the compensated seismic data of Q to described, obtains time-frequency data volume；
Obtain the time-frequency data volume local time-frequency peak value it is all corresponding at the time of, by local all correspondences of time-frequency peak value
At the time of determine coating position.
The spectrum diagram of the seismic data, as shown in Fig. 2, abscissa is frequency, ordinate is amplitude.
In conventional convolution model, it is assumed that seismic channel is stable, but in a practical situation, seismic signal is non-stationary
, there is apparent local feature, thus need that in the seismic data, according to normal Q model, preliminary wavelet and attenuation by absorption are caused
Non-stationary effect include；It should be noted that the seismic data includes multiple earthquake one-channel record data, specific point
When analysis, the seismic data can be analyzed by earthquake one-channel record data.
Preferably, described that seismic data is subjected to Q compensation, it obtains specifically including through the compensated seismic data of Q:
Utilize formulaQ compensation is carried out to seismic data, obtains mending through Q
Seismic data S after repayingQ(t), wherein r (τ) is reflection coefficient sequence, aQ(τ, f)=e-πfτ/Q+iH(πfτ/Q)For the transmitting letter of Q
Number, H are the Hilbert transform at the τ moment to frequency f.The compensated seismic data of Q can more preferably characterize formation information.
On the basis of Q compensated seismic data, time-frequency data volume can be obtained according to generalized S-transform；
Preferably, generalized S-transform is carried out through the compensated seismic data of Q to described, obtains time-frequency data volume, it is specific to wrap
It includes:
Utilize formulaTo described through the compensated earthquake number of Q
According to generalized S-transform is carried out, time-frequency data volume ST (τ, f) is obtained, wherein λ and q is control generalized S-transform time frequency resolution two
A parameter, λ > 1, q > 1.
It should be noted that S can be derived by Fourier transformationQ(t) S-transformation, it may be assumed that
In above formula, σ is scale coefficient；σ is the function of frequency f,
S then can be obtainedQ(t) generalized S-transform,
As 0<λ<1,0<q<1, can above-mentioned transformation can reduce time frequency resolution, work as λ>1, when q>1, above-mentioned transformation can be with
Time frequency resolution is improved, as λ=1, q=1, above-mentioned transformation is general S-transformation；When λ > 1 in above formula, q > 1, it can be obtained
Time-frequency data volume ST (τ, f).
Preferably, obtain the time-frequency data volume local time-frequency peak value it is all corresponding at the time of, specifically include:
The maximum of frequency in time-frequency data volume ST (τ, f) is sought, corresponding time instant τ is then the office of time-frequency data volume at this time
At the time of portion's time-frequency peak value is all corresponding.
In time-frequency data volume ST (τ, f), if there is a time instant τ in the section (a, b)0Corresponding frequency, is greater than
τ is removed in the section (a, b)0Corresponding frequency of all moment in addition, then τ0Corresponding frequency is local time-frequency peak value, τ0The office
At the time of portion's time-frequency peak value corresponds to；It is known that many local time-frequency peak values and its corresponding in time-frequency data volume ST (τ, f)
Moment.
The position of thin layer is assured that according to the local frequencies peak value corresponding time, Fig. 3 is based on local frequencies peak value
Geological layering and Thin Sandbody top surface explain schematic diagram；Left-half in figure, ordinate are time (ms), and abscissa is
Frequency (Hz), right half part in figure, ordinate are time (ms), and abscissa is distance (m).
The geological layering and Thin Sandbody top surface shown in Fig. 3 based on local frequencies peak value explain schematic diagram, be with
Schematic diagram for 2033 well of port can find out 8 substratums according to the local frequencies peak value of interval of interest on seismic channel；
Now according to the result of geological layering and lithologic interpretation to verify the land provided by the invention based on local peaking's frequency
The validity of mutually thin RESERVOIR INTERPRETATION method；Fig. 4 is 2033 geological layering result schematic diagram of port, which is known 2033 geology of port point
Layer layering, corresponding 2033 geological layering lithologic interpretation table of port, as shown in table 1；
1 port of table, 2033 geological layering lithologic interpretation table
By Fig. 3-4 and table 1 it is found that local peaking's frequency location and geological layering corresponding relationship are preferable, it is seen that the present invention
The thin RESERVOIR INTERPRETATION method of the terrestrial facies based on local peaking's frequency provided has good reliability；
Other seismic channels are analogized between can carrying out well according to this method, and the thin layer that also can be generalized to no wellblock is explained；
More importantly this method can explain sand body top bottom interface, make the result explained from the depositional sequence of big (thickness) scale to small
Determining step by step for the depositional sequence of rank (such as more than ten meters to several meters), substantially increases the precision of seismic interpretation, for determining for thin layer
Amount is explained and is laid the foundation.
A kind of thin RESERVOIR INTERPRETATION method of terrestrial facies based on local peaking's frequency provided by the invention is managed according to the tuning of thin layer
By the variation of utilization (local peaking's frequency, Local peak frequency) LPF reflects the variation of thin layer combination, and root
The explanation that thin layer is carried out according to the radio-frequency component of LPF can carry out multilayer explanation to the thin layer in a lineups according to LPF, effectively
It avoids and only explains one layer in conventional stratigraphic interpretation in a lineups, and avoid the later period according to one layer of interpretation horizon
Carry out slice or when string layer phenomenon of in-migration when portray thin layer, to improve the Explanation Accuracy and thin layer of seismic data
Attributes extraction；
Traditional method is mainly based upon amplitude and phase information in kinetic parameter, and it is same can only to express roughly seismic wave
Phase shaft space overall trend can not embody interior details feature, and amplitude is also the synthesis of multiple frequencies, reduces thin layer
Response characteristic on seismic event；
And the method for the invention, make full use of the frequency-response characteristic of thin layer to reflect the Spatial Variation of thin layer,
And then thin layer lengthwise position is analyzed and quantifies, preferably thin layer is explained, on identical seismic data, is preferably utilized
Frequency parameter in kinetic parameter makes the result explained from the depositional sequence of big (thickness) scale to (such as more than ten meters of small rank
To several meters) depositional sequence determine step by step, substantially increase the precision of thin layer explanation.
Embodiment 2
The present invention also provides a kind of thin RESERVOIR INTERPRETATION systems of terrestrial facies based on local peaking's frequency, including seismic data to adopt
Collect module, compensating module, time-frequency data volume and obtains module, coating position determining module；
Earthquake data acquisition module is for acquiring seismic data；
Compensating module is used to seismic data carrying out Q compensation, obtains through the compensated data of Q；
Time-frequency data volume obtains module and is used to carry out generalized S-transform through the compensated seismic data of Q to described, obtains time-frequency
Data volume；
At the time of local time-frequency peak value of the coating position determining module for obtaining the time-frequency data volume is all corresponding, by
Local time-frequency peak value determines coating position at the time of all corresponding.
Preferably, time-frequency data volume obtains module and utilizes formulaOver the ground
It shakes data and carries out Q compensation, obtain through the compensated seismic data S of QQ(t), wherein r (τ) is reflection coefficient sequence, aQ(τ, f)=
e-πfτ/Q+iH(πfτ/Q)For the transmission function of Q, H is the Hilbert transform at the τ moment to frequency f.
Preferably, time-frequency data volume obtains module and utilizes formula
Carry out generalized S-transform through the compensated seismic data of Q to described, obtain time-frequency data volume ST (τ, f), wherein λ and
Q is two parameters for controlling generalized S-transform time frequency resolution, λ > 1, q > 1.
Preferably, the coating position determining module further includes that local time-frequency peak value corresponds to moment determination unit；
The part time-frequency peak value corresponds to the maximum that moment determination unit seeks frequency in time-frequency data volume ST (τ, f),
At the time of corresponding time instant τ is then corresponding to the local time-frequency peak value of time-frequency data volume at this time.
The invention discloses a kind of thin RESERVOIR INTERPRETATION method and system of terrestrial facies based on local peaking's frequency, make full use of thin
The frequency-response characteristic of layer reflects the Spatial Variation of thin layer, and then analyzes and quantify thin layer lengthwise position, preferably right
Thin layer explains；
The explanation that thin layer is carried out using the radio-frequency component of local peaking's frequency, can be to a same phase by local peaking's frequency
Thin layer in axis carries out multilayer explanation, effectively prevents only one layer of the explanation in a lineups in conventional stratigraphic interpretation, and
Avoid the later period according to one layer of interpretation horizon carry out slice or when in-migration portray thin layer when string layer phenomenon, to mention
The high Explanation Accuracy of thin layer.
The above described specific embodiments of the present invention are not intended to limit the scope of the present invention..Any basis
Any other various changes and modifications that technical concept of the invention is made should be included in the guarantor of the claims in the present invention
It protects in range.
Claims (8)
1. a kind of thin RESERVOIR INTERPRETATION method of terrestrial facies based on local peaking's frequency, which comprises the following steps:
Seismic data is acquired, seismic data is subjected to Q compensation, is obtained through the compensated seismic data of Q；
Generalized S-transform is carried out through the compensated seismic data of Q to described, obtains time-frequency data volume；
Obtain the time-frequency data volume local time-frequency peak value it is all corresponding at the time of, when all corresponding by local time-frequency peak value
It carves and determines coating position.
2. the thin RESERVOIR INTERPRETATION method of the terrestrial facies according to claim 1 based on local peaking's frequency, which is characterized in that described
Seismic data is subjected to Q compensation, obtains specifically including through the compensated seismic data of Q:
Utilize formulaQ compensation is carried out to seismic data, is obtained compensated through Q
Seismic data SQ(t), wherein r (τ) is reflection coefficient sequence, aQ(τ, f)=e-πfτ/Q+iH(πfτ/Q)For the transmission function of Q, H be
Hilbert transform of the τ moment to frequency f.
3. the thin RESERVOIR INTERPRETATION method of the terrestrial facies according to claim 2 based on local peaking's frequency, which is characterized in that institute
It states and carries out generalized S-transform through the compensated seismic data of Q, obtain time-frequency data volume, specifically include:
Utilize formulaIt is carried out to described through the compensated seismic data of Q
Generalized S-transform obtains time-frequency data volume ST (τ, f), wherein and λ and q is two parameters for controlling generalized S-transform time frequency resolution,
λ > 1, q > 1.
4. the thin RESERVOIR INTERPRETATION method of the terrestrial facies according to claim 3 based on local peaking's frequency, which is characterized in that obtain
At the time of the local time-frequency peak value of the time-frequency data volume is all corresponding, specifically include:
The maximum of frequency in time-frequency data volume ST (τ, f) is sought, corresponding time instant τ is then the local time of time-frequency data volume at this time
At the time of frequency peak value has corresponding.
5. a kind of thin RESERVOIR INTERPRETATION system of terrestrial facies based on local peaking's frequency, which is characterized in that including earthquake data acquisition mould
Block, compensating module, time-frequency data volume obtain module, coating position determining module；
Earthquake data acquisition module is for acquiring seismic data；
Compensating module is used to seismic data carrying out Q compensation, obtains through the compensated seismic data of Q；
Time-frequency data volume obtains module and is used to carry out generalized S-transform through the compensated seismic data of Q to described, obtains time-frequency data
Body；
At the time of local time-frequency peak value of the coating position determining module for obtaining the time-frequency data volume is all corresponding, by part
Time-frequency peak value determines coating position at the time of all corresponding.
6. the thin RESERVOIR INTERPRETATION system of the terrestrial facies according to claim 5 based on local peaking's frequency, which is characterized in that time-frequency
Data volume obtains module and utilizes formulaQ compensation is carried out to seismic data, is obtained
Through the compensated seismic data S of QQ(t), wherein r (τ) is reflection coefficient sequence, aQ(τ, f)=e-πfτ/Q+iH(πfτ/Q)For the biography of Q
Delivery function, H are the Hilbert transform at the τ moment to frequency f.
7. the thin RESERVOIR INTERPRETATION system of the terrestrial facies according to claim 6 based on local peaking's frequency, which is characterized in that
Time-frequency data volume obtains module and utilizes formulaIt is mended to described through Q
Seismic data after repaying carries out generalized S-transform, obtains time-frequency data volume ST (τ, f), wherein when λ and q is control generalized S-transform
Two parameters of frequency division resolution, λ > 1, q > 1.
8. the thin RESERVOIR INTERPRETATION system of the terrestrial facies according to claim 6 based on local peaking's frequency, which is characterized in that described
Coating position determining module further includes that local time-frequency peak value corresponds to moment determination unit；
The part time-frequency peak value corresponds to the maximum that moment determination unit seeks frequency in time-frequency data volume ST (τ, f), at this time
At the time of corresponding time instant τ is then corresponding to the local time-frequency peak value of time-frequency data volume.
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Application publication date: 20191115 |