CN104570079A - Time matching method of longitudinal wave and converted shear wave seismic data - Google Patents
Time matching method of longitudinal wave and converted shear wave seismic data Download PDFInfo
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Abstract
The invention discloses a time matching method of longitudinal wave and converted shear wave seismic data. The time matching method comprises the following steps: respectively performing horizon interpretation on key horizons of the longitudinal wave and converted shear wave seismic data, and using times of longitudinal wave and converted wave in the key horizons to calculate an initial speed ratio of the longitudinal wave and transverse wave, and carrying out initial time matching on a seismic section of converted wave by using the initial speed ratio; using a disturbance method of the speed ratio of the longitudinal wave and transverse wave to perform correlation-spectra analysis on a converted wave initial time matching section and a longitudinal wave section, and picking up the disturbance quantity of the speed ratio; using the disturbance quantity to correct the initial speed ratio to obtain a speed ratio of longitudinal wave and transverse wave based on horizon interpretation and fine disturbance, and using the speed ratio to convert time of the converted wave section to a longitudinal wave two-way time. After the time matching of a longitudinal wave section and a converted wave section is realized through the method provided by the invention, and the consistency of the formation and the wave group of the converted wave section with the time of the longitudinal wave section is good, so that a good material is provided for subsequent combined application.
Description
Technical field
The invention belongs to seismic data interpretation field, is a kind of time match method of compressional wave, converted transverse wave earthquake data.
Background technology
Different from the longitudinal wave reflection seismic exploration technique of routine, multi-components reflection wave seismic exploration technology utilizes three-component seismometer to receive conventional compressional wave and converted shear wave, therefore, it is possible to more effective solution geological problem, such as: improve the image quality of underground geologic bodies by the anisotropy studying multi-component seismic, improve the description of fracture reservoir; By joint inversion with joint interpretation is more effective carries out Lithology Discrimination and fluid prediction to underground medium.P wave data and converted waves data all there are differences on time, space and waveform.Therefore, in the quantitative test such as explanation, inverting, attributes extraction of multi-component earthquake data, the coupling of P wave data and converted waves data is all absolutely necessary a step.Data Matching generally refers to and is transformed into the two-way time of corresponding compressional wave by transformed wave reflection from its time domain, i.e. the time match of compressional wave, transformed wave data.At present, the time match of compressional wave, transformed wave seismic data mainly contains two kinds of methods: a kind of is by making an explanation to the reference lamina of compressional wave, converted wave sectional plane, P-S wave velocity ratio is calculated according to the layer position of explaining, time match is carried out to compressional wave, converted wave sectional plane, makes the transformed wave time consistent with the compressional wave time; Another kind adopts P-S wave velocity ratio scanning method, according to the velocity ratio of the related coefficient pickup different time of compressional wave, transformed wave seismic trace, utilizes the speed obtained, than data, transformed wave data is transformed into the compressional wave time.But above-mentioned two kinds of methods all existing defects, the former is reliable at the time match of reference lamina position, and can not ensure the effect of time match between reference lamina; The latter can not ensure that difference analyzes the horizontal consistance of speed than pickup, easily produces larger error.
Summary of the invention
In the application of multiwave multicomponent earthquake data interpretation, the time match of compressional wave, converted shear wave is a puzzlement explanation personnel's difficult problem always, and due to existing method existing defects, time match result exists larger error.In order to carry out time match to compressional wave, transformed wave data more accurately, improving the precision of wave seismic data joint interpretation in length and breadth, having invented compressional wave, transformed wave data time match technology based on the explanation of layer position and meticulous disturbance.
The main thought of the time match method of compressional wave, converted transverse wave earthquake data is, combining, realizing the fine-time coupling of compressional wave, transformed wave seismic data by compressional wave, the explanation of transformed wave layer position being scanned with P-S wave velocity ratio.
Concrete technical scheme is: the time match method of compressional wave, converted transverse wave earthquake data, comprises the steps:
Step one: the layer position of compressional wave, transformed wave seismic data being carried out to reference lamina is explained, the compressional wave utilizing reference lamina corresponding, the initial P-S wave velocity ratio of transformed wave Time Calculation, utilize this speed to carry out initial time coupling than to compressional wave, transformed wave seismic section, obtain transformed wave initial time coupling section;
Step 2: by the method for P-S wave velocity ratio disturbance, the seismic trace mate the transformed wave initial time obtained from step one and longitudinal wave earthquake road carry out correlation-spectra analysis, and pickup velocity compares disturbance quantity; Utilize this disturbance quantity to correct the initial velocity ratio analyzed, obtain the P-S wave velocity ratio based on the explanation of layer position and meticulous disturbance;
Step 3: step 2 operation is carried out to the seismic trace of position multiple in three-dimensional work area, initial P-S wave velocity ratio data volume is corrected, obtain three-dimensional explanation based on layer position and the P-S wave velocity ratio data volume of meticulous disturbance, utilize this velocity ratio body, the time of converted wave sectional plane is converted to the compressional wave two-way time, namely completes the compressional wave of this method, transformed wave time match.
Further, described compressional wave, transformed wave seismic data are compressional wave, transformed wave stacked seismic data
;describedly to the concrete grammar that compressional wave, transformed wave seismic section carry out initial time coupling be: utilize compressional wave, the transformed wave layer bit data explaining each reference lamina obtained to calculate P-S wave velocity ratio, obtain the P-S wave velocity ratio plane distribution data of each mark; Utilize the P-S wave velocity ratio data of each reference lamina to carry out space interpolation, obtain the initial P-S wave velocity ratio data volume explained based on layer position; Utilize this speed to carry out initial time coupling than data volume to compressional wave, transformed wave geological data, obtain transformed wave initial time matched data body.
Further, described pickup velocity than the method for disturbance quantity is: the method scanned by P-S wave velocity ratio disturbance quantity obtains compressional wave, transformed wave spectrum of correlation coefficient; The P-S wave velocity ratio disturbance quantity of different time is obtained by the position that pickup correlativity mutual in spectrum of correlation coefficient is maximum; Above-mentioned disturbance quantity is the correcting value of initial P-S wave velocity ratio, and described correction refers to utilize the initial P-S wave velocity ratio of this correcting value to correlation analysis road to correct.
Further, describedly converted wave sectional plane is compressed to the compressional wave time and refers to the time of converted wave sectional plane is converted to the compressional wave two-way time.
The invention has the beneficial effects as follows: the advantage of time match method simultaneously considering existing two kinds of compressional waves, transformed wave data, by both combinations, now methodical defect can be avoided, improve the accuracy of time match and precision, for the application such as the joint inversion of ripple data combine, petroleum-gas prediction in length and breadth provide comparatively correct time matching result.
Accompanying drawing explanation
Fig. 1 a is compressional wave (PP), transformed wave initial time coupling section (PS(1)) figure.
Fig. 1 b is the initial P-S wave velocity ratio curve map that in the middle of Fig. 1 a sectional view, seismic trace is corresponding.
Fig. 2 a is pickup P-S wave velocity ratio disturbance quantity schematic diagram.
Fig. 2 b utilizes Fig. 2 a disturbance quantity to the initial velocity analyzed than the transformed wave (PS(2) correcting rear formation) and compressional wave (PP) Profile Correlation figure.
Fig. 2 c is the P-S wave velocity ratio curve map after correcting.
Fig. 3 a is block district, Luojia area P-wave section figure.
Fig. 3 b is the converted wave sectional plane figure obtained after block district, Luojia area applies the technology of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further details.At this, schematic description and description of the present invention is for explaining the present invention, but not as a limitation of the invention.
The embodiment of the present invention provides a kind of time match method of compressional wave, converted transverse wave earthquake data, and performing step is as follows:
(1) faults comparison that compressional wave, transformed wave stacked seismic data carry out reference lamina is explained; Utilize compressional wave, the transformed wave layer bit data calculating P-S wave velocity ratio of explaining each reference lamina obtained, obtain the P-S wave velocity ratio plane distribution data of each mark; Utilize the P-S wave velocity ratio data of each reference lamina to carry out space interpolation, obtain the initial P-S wave velocity ratio data volume explained based on layer position; Utilize this speed to carry out initial time coupling than data volume to compressional wave, transformed wave geological data, obtain transformed wave initial time matched data body.
(2) carry out correlation analysis to the transformed wave initial time coupling seismic trace obtained from step (1) and longitudinal wave earthquake road, the method scanned by P-S wave velocity ratio disturbance quantity obtains compressional wave, transformed wave spectrum of correlation coefficient; Obtained the P-S wave velocity ratio disturbance quantity of different time by the position that pickup correlativity mutual in spectrum of correlation coefficient is maximum, this disturbance quantity is the correcting value of initial P-S wave velocity ratio; Utilize the initial P-S wave velocity ratio of this correcting value to correlation analysis road to correct, obtain the P-S wave velocity ratio based on the explanation of layer position and meticulous disturbance.
(3) step (2) operation is carried out to the seismic trace of position multiple in three-dimensional work area, initial P-S wave velocity ratio data volume is corrected, obtain three-dimensional explanation based on layer position and the P-S wave velocity ratio data volume of meticulous disturbance, utilize this velocity ratio body, the time of converted wave sectional plane is converted to the compressional wave two-way time, namely completes the compressional wave of this method, transformed wave time match.
Below, by reference to the accompanying drawings the embodiment of the present invention is described further.
As shown in Figure 1 a, 1 b, first the layer position that compressional wave, transformed wave data carry out reference lamina is explained, in Fig. 1 a, T0, T1, T2 are the reference lamina explained, the compressional wave utilizing three reference laminas corresponding, transformed wave time can calculate initial P-S wave velocity ratio, the P-S wave velocity ratio curve shown in Fig. 1 b is the result of section interim orbit, to contrast with next step result; Utilize initial p-and s-wave velocity comparison converted wave sectional plane to carry out time match, obtain initial transformed wave time match profile P S(1).
Utilize initial transformed wave time match profile P S(1) and P-wave section (in Fig. 1 a left-hand component), choose compressional wave, transformed wave analyzes and carry out correlation analysis, the method scanned by P-S wave velocity ratio disturbance quantity obtains compressional wave, transformed wave spectrum of correlation coefficient.As shown in Figure 2 a; The position that mutual pickup correlativity is maximum in spectrum of correlation coefficient obtains the P-S wave velocity ratio disturbance quantity of different time.As shown in curve in Fig. 2 a, this disturbance quantity is the correcting value of initial P-S wave velocity ratio; The initial P-S wave velocity ratio of this correcting value to correlation analysis road is utilized to correct.As shown in Figure 2 c, the P-S wave velocity ratio based on the explanation of layer position and meticulous disturbance is obtained.
PS(2 in Fig. 2 b) be initial transformed wave time match profile P S(1) by the speed of interim orbit than the result obtained after meticulous disturbance, can see, between reference lamina T0, T1, T2 compressional wave, transformed wave in the same way axle obtain and mate more accurately.
As shown in Figure 3 a, 3 b, test in block district, Luojia area.According to work area geological condition, the meticulous perturbation analysis of P-S wave velocity ratio is carried out to the seismic trace that spacing in plane is 40 roads (track pitch 6.25 meters), initial P-S wave velocity ratio data volume is corrected, obtain the P-S wave velocity ratio data volume after correcting, utilize this speed, than data volume, the time of transformed wave geological data is converted to the compressional wave two-way time, obtain the converted waves data body after final time match.As shown in Figure 3 a, 3 b, Luojia area to be explained based on layer position and the compressional wave of meticulous disturbance, transformed wave data time match situation contrast, can see, after application the technology of the present invention carries out time match, the structure of converted wave sectional plane, ripple group and P-wave section time consistency are better, for follow-up use in conjunction provides good data.
Claims (4)
1. a time match method for compressional wave, converted transverse wave earthquake data, is characterized in that: comprise the steps:
Step one: the layer position of compressional wave, transformed wave seismic data being carried out to reference lamina is explained, the compressional wave utilizing reference lamina corresponding, the initial P-S wave velocity ratio of transformed wave Time Calculation, utilize this speed to carry out initial time coupling than to compressional wave, transformed wave seismic section, obtain transformed wave initial time coupling section;
Step 2: by the method for P-S wave velocity ratio disturbance, the seismic trace mate the transformed wave initial time obtained from step one and longitudinal wave earthquake road carry out correlation-spectra analysis, and pickup velocity compares disturbance quantity; Utilize this disturbance quantity to correct the initial velocity ratio analyzed, obtain the P-S wave velocity ratio based on the explanation of layer position and meticulous disturbance;
Step 3: step 2 operation is carried out to the seismic trace of position multiple in three-dimensional work area, initial P-S wave velocity ratio data volume is corrected, obtain three-dimensional explanation based on layer position and the P-S wave velocity ratio data volume of meticulous disturbance, utilize this velocity ratio body, the time of converted wave sectional plane is converted to the compressional wave two-way time, namely completes the compressional wave of this method, transformed wave time match.
2. the time match method of a kind of compressional wave as claimed in claim 1, converted transverse wave earthquake data, is characterized in that:
Described compressional wave, transformed wave seismic data are compressional wave, transformed wave stacked seismic data
;
Describedly to the concrete grammar that compressional wave, transformed wave seismic section carry out initial time coupling be: utilize compressional wave, the transformed wave layer bit data explaining each reference lamina obtained to calculate P-S wave velocity ratio, obtain the P-S wave velocity ratio plane distribution data of each mark; Utilize the P-S wave velocity ratio data of each reference lamina to carry out space interpolation, obtain the initial P-S wave velocity ratio data volume explained based on layer position; Utilize this speed to carry out initial time coupling than data volume to compressional wave, transformed wave geological data, obtain transformed wave initial time matched data body.
3. the time match method of a kind of compressional wave as claimed in claim 2, converted transverse wave earthquake data, is characterized in that:
Described pickup velocity than the method for disturbance quantity is: the method scanned by P-S wave velocity ratio disturbance quantity obtains compressional wave, transformed wave spectrum of correlation coefficient; The P-S wave velocity ratio disturbance quantity of different time is obtained by the position that pickup correlativity mutual in spectrum of correlation coefficient is maximum;
Above-mentioned disturbance quantity is the correcting value of initial P-S wave velocity ratio, and described correction refers to utilize the initial P-S wave velocity ratio of this correcting value to correlation analysis road to correct.
4. the time match method of a kind of compressional wave as claimed in claim 3, converted transverse wave earthquake data, is characterized in that: describedly converted wave sectional plane is compressed to the compressional wave time and refers to the time of converted wave sectional plane is converted to the compressional wave two-way time.
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| CN104865600A (en) * | 2015-06-10 | 2015-08-26 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Method for matching transverse wave data and longitudinal wave data in seismic record |
| CN105005075A (en) * | 2015-06-25 | 2015-10-28 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Multi-wave matching method based on seismic frequency information |
| CN106199704A (en) * | 2016-09-13 | 2016-12-07 | 中国海洋石油总公司 | A kind of Three-dimendimal fusion submarine cable seismic data velocity modeling method |
| CN106226811A (en) * | 2016-07-05 | 2016-12-14 | 中国石油天然气集团公司 | A kind of P wave data based on attribute and the method and device of converted waves data coupling |
| CN106646611A (en) * | 2016-12-08 | 2017-05-10 | 中国石油天然气集团公司 | Longitudinal wave and converted wave seismic data time matching method and device |
| CN106772599A (en) * | 2016-12-16 | 2017-05-31 | 中国石油天然气集团公司 | A kind of method and device for calculating formation shear speed |
| CN107167843A (en) * | 2017-05-25 | 2017-09-15 | 中国石油天然气集团公司 | Many ripple time-domain matching process and device |
| CN108303741A (en) * | 2018-02-11 | 2018-07-20 | 中国石油化工股份有限公司 | The double inspections of earthquake based on water inspection integral merge singing drawing method |
| CN108508481A (en) * | 2018-05-17 | 2018-09-07 | 中国石油天然气集团有限公司 | A kind of method, apparatus and system of longitudinal wave converted wave seismic data time match |
| CN110618448A (en) * | 2018-06-19 | 2019-12-27 | 中国石油化工股份有限公司 | Multi-wave dynamic matching method and system |
| CN110780351A (en) * | 2018-07-31 | 2020-02-11 | 中国石油化工股份有限公司 | Longitudinal wave and converted wave prestack joint inversion method and system |
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| WO2020215170A1 (en) * | 2019-04-26 | 2020-10-29 | 中国石油化工股份有限公司 | Seismic petrophysical experiment analysis-based logging and seismic speed matching method |
| CN112379439A (en) * | 2020-11-02 | 2021-02-19 | 中国石油天然气集团有限公司 | Method and device for matching longitudinal wave and transverse wave in seismic data |
| CN113917534A (en) * | 2021-09-01 | 2022-01-11 | 展少辉 | Longitudinal and transverse wave matching method and device for geophysical exploration |
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| CN104865600A (en) * | 2015-06-10 | 2015-08-26 | 中国石油集团川庆钻探工程有限公司地球物理勘探公司 | Method for matching transverse wave data and longitudinal wave data in seismic record |
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Application publication date: 20150429 |