CN105589097B - The phased dedusting method of clastic reservoir rock seismic description - Google Patents
The phased dedusting method of clastic reservoir rock seismic description Download PDFInfo
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Abstract
The present invention provides a kind of phased dedusting method of clastic reservoir rock seismic description, and the phased dedusting method of the clastic reservoir rock seismic description includes:Step 1, grey matter lithofacies distribution statistics is completed using work area drilling data；Step 2, the seismic response forward modeling analysis of work area individual well target zone grey matter rock petrofacies is carried out, obtains grey matter petrofacies and seismic response relational expression；Step 3, asking for grey matter petrofacies influences the seismic properties correction body of reservoir prediction；Step 4, reservoir Application of Logging-constrained Inversion and relative earthquake attributes extraction are carried out；And step 5, data is bored in fact with reference to drilling well, and fine description is carried out using the Application of Logging-constrained Inversion data volume after correction or attribute volume.The phased dedusting method of the clastic reservoir rock seismic description substantially solves the grey matter influence that reservoir prediction is carried out using 3-D seismics, realizes fine description and the evaluation of reservoir, positive effect has been seen in exploration and development application.
Description
Technical field
The present invention relates to oil field development technical field, especially relates to a kind of the phased of clastic reservoir rock seismic description and goes
Grey method.
Background technology
Realized using three dimensional seismic data highly important in reservoir prediction and description always oil-gas exploration and development field
One evaluation content.Seismic reflection character influence of the carbonate rock on clastic reservoir rock is very big, and removing grey matter influences to realize reservoir
Accurate Prediction and description are always the field important research content.At present, the technology mainly utilizes individual well dedusting experiment understanding ash
Confrontation seismic reservoir response relation, then explain that personnel intuitively distinguish the seismic response features of reservoir, this method is main between well
It is inadequate by explanation personnel's subjective judgement, fine degree.In addition, mainly removing grey matter using geophysical method in recent years influences
Method for predicting reservoir also achieve greater advance, including the methods of wavelet decomposition, more attributes joint and prestack inversion, but to
Drilling data depends on seism processing using limited, is related to that highly professional, method is complicated is difficult to popularization and application.
Compared with high matured exploration area, drilling well density is higher, and the cementing situation of carbonate rock is totally clear and definite, and numerous geologists need a kind of fast
Prompt method effective, economical and practical, technical costs is low, to serve daily production work.For this, we have invented a kind of new
Clastic reservoir rock seismic description phased dedusting method, solve above technical problem.
The content of the invention
Combining closely for drilling well and seismic data is strengthened it is an object of the invention to provide a kind of, meets seismology and statistics
General principle is learned, can be widely applied to similar to the clastic reservoir rock seismic description in the oil-gas exploration and development work under the conditions of geology
Phased dedusting method.
The purpose of the present invention can be achieved by the following technical measures：The phased dedusting side of clastic reservoir rock seismic description
Method, the phased dedusting method of the clastic reservoir rock seismic description include:Step 1, grey matter petrofacies are completed using work area drilling data
Distribution statisticses；Step 2, carry out work area individual well target zone grey matter rock petrofacies seismic response forward modeling analysis, obtain grey matter petrofacies with
Seismic response relational expression；Step 3, asking for grey matter petrofacies influences the seismic properties correction body of reservoir prediction；Step 4, reservoir is carried out
Application of Logging-constrained Inversion and relative earthquake attributes extraction；And step 5, data is bored in fact with reference to drilling well, utilizes the survey after correction
Well constrained inversion data volume or attribute volume carry out fine description.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, target zone grey matter rock is carried out with reference to interval transit time, natural potential, a variety of well-log informations of natural gamma
The identification of phase, statistical lithofacies thickness, ultimately form grey matter petrofacies flat distribution map.
In step 2, the seismic response forward modeling analysis of work area individual well target zone grey matter rock petrofacies, the displacement of grey matter petrofacies are completed
Seismic properties variable y and grey matter petrofacies thickness x is closely related after normal country rock, more well fitting attribute variables and grey matter petrofacies thickness
Variable draws relational expression：Y=289.73e0.0881x, so as to clear and definite grey matter petrofacies and the response relation formula of Seismic reflection character.
In step 3, according to grey matter petrofacies and seismic response relational expression y=289.73e0.0881x, controlled in grey matter petrofacies
Grey matter petrofacies are asked in lower computing influences the seismic properties correction body of reservoir prediction, and association attributes school is carried out to three dimensional seismic data
Just.
In step 4, reservoir Application of Logging-constrained Inversion and relative earthquake are carried out using the 3-d seismic data set after correction
Attributes extraction, 3-d seismic data set can more Accurate Prediction reservoir after correction.
In clastic rock oil basin, carbonate rock has a significant impact to the seismic description of reservoir and prediction, so as to cause
The accurate sexual deviation of layer description, probing is caused to be defeated.Present invention aim to address the dedusting problem of such Earthquakes data,
So as to improve the earthquake prediction of reservoir and description accuracy.Former technology is confined to individual well dedusting experiment and processing, inter-wells predicting
Still sentence knowledge by explanation personnel's subjectivity, quantitative assessment can not be carried out；And simple geophysical method requires that professional technical is strong, bore
Well and seismic data combination degree are inadequate, it is impossible to meet the evaluation requirement in higher probing area.The present invention is utilizing more mouthfuls of individual wells just
Drill and grey matter content and seismic properties response relation formula are established in experimental basis；NULL area interval of interest grey matter content, it is determined that
Grey matter petrofacies planar distribution feature；Using grey matter petrofacies as background control condition, according to grey matter petrofacies and seismic properties response relation
Formula, whole removing influences except the grey matter of research area's 3-D seismics association attributes, and then completes layer description and prediction work.In example
In, the present invention is obvious to solve the grey matter influence that reservoir prediction is carried out using 3-D seismics, realizes the fine of reservoir and retouches
State and evaluate, positive effect has been seen in exploration and development application.
Brief description of the drawings
Fig. 1 phased dedusting methods of clastic reservoir rock seismic description in the embodiment of Shengli Oil Field work area for the present invention
Flow chart；
Fig. 2 is in the work area embodiment central gray depth of stratum and seismic amplitude response relation figure using the present invention；
Fig. 3 is in the work area embodiment central gray petrofacies thickness distribution figure using the present invention；
Fig. 4 is to influence seismic reservoir response corrections body figure in the work area embodiment central gray petrofacies using the present invention；
Fig. 5 be using the present invention in the work area embodiment dedusting of inverting section influence before and after comparison diagram；
Fig. 6 be using the present invention in the work area embodiment amplitude attribute dedusting influence before and after comparison diagram.
Embodiment
For enable the present invention above and other objects, features and advantages become apparent, it is cited below particularly go out preferable implementation
Example, and coordinate institute's accompanying drawings, it is described in detail below.
Fig. 1 is the flow chart of the present invention phased dedusting method of clastic reservoir rock seismic description in the work area embodiment.
In step 101, grey matter lithofacies distribution statistics is completed using all drilling datas in work area.With reference to interval transit time, natural potential, nature
A variety of well-log informations such as gamma carry out the identification of target zone grey matter petrofacies, statistical lithofacies thickness, ultimately form grey matter petrofacies and put down
Mapping.Flow enters step 102.
Fig. 2 is in the work area embodiment central gray petrofacies thickness distribution figure using the present invention.Wherein, the ash that well logging recognition goes out
Matter petrofacies thickness parameter is most sensitive to seismic response.
In step 102, the seismic response forward modeling analysis of work area individual well target zone grey matter rock petrofacies, the displacement of grey matter petrofacies are completed
Seismic properties variable (y) and grey matter petrofacies thickness (x) are closely related after normal country rock, more well fitting attribute variables and grey matter petrofacies
Gauge variation draws relational expression：Y=289.73e0.0881x, so as to the response relation of clear and definite grey matter petrofacies and Seismic reflection character
Formula.Flow enters step 103.
Fig. 3 is in the work area embodiment central gray depth of stratum and seismic amplitude response relation figure using the present invention.Wherein,
Amplitude attribute influence relation is fairly obvious after individual well removes grey matter petrofacies, defers to the relational expression fitted.
In step 103, asking for grey matter petrofacies influences the seismic properties correction body of reservoir prediction.According to grey matter petrofacies and earthquake
Response relation formula y=289.73e0.0881x, grey matter petrofacies are asked in computing under the control of grey matter petrofacies influences the earthquake of reservoir prediction
Attribute corrects body, and association attributes correction is carried out to three dimensional seismic data.Flow enters step 104.
Fig. 4 is to influence seismic reservoir response corrections body figure in the work area embodiment central gray petrofacies using the present invention.Wherein,
Bottom figure layer is the seismic response features under the influence of no grey matter petrofacies, and top figure layer is the actual seismic under the influence of grey matter petrofacies
Response characteristic, this invention are exactly phased lower removal difference therebetween.
In step 104, reservoir Application of Logging-constrained Inversion and relative earthquake are carried out using the 3-d seismic data set after correction
Attributes extraction.Reservoir Application of Logging-constrained Inversion and seismic attribute abstraction presentation notable difference, school are carried out compared to using initial data body
Data volume can more Accurate Prediction reservoir after just.Flow enters step 105.
Fig. 5 be using the present invention in the work area embodiment dedusting of inverting section influence before and after comparison diagram.Wherein, upper figure is
The Application of Logging-constrained Inversion section of grey matter petrofacies influence is not removed, and the Application of Logging-constrained Inversion that figure below influences to remove grey matter petrofacies cuts open
Face, it is coincide with drilling well, positive effect.
Fig. 6 be using the present invention in the work area embodiment amplitude attribute dedusting influence before and after comparison diagram.Wherein, upper figure is
The amplitude attribute plan of grey matter petrofacies influence is not removed, figure below is to remove the amplitude attribute plan that grey matter petrofacies influence, with
Drilling well coincide, positive effect.
In step 105, data is bored in fact with reference to drilling well, is entered using the Application of Logging-constrained Inversion data volume after correction or attribute volume
Row fine description.So far, influence of the grey matter petrofacies to layer description and prediction in three dimensional seismic data is eliminated, reservoir prediction
Accuracy is obviously improved, and improves exploration and development benefit.Flow terminates.
Claims (1)
1. the phased dedusting method of clastic reservoir rock seismic description, it is characterised in that the clastic reservoir rock seismic description it is phased
Dedusting method includes:
Step 1, grey matter rock lithofacies distribution statistics is completed using work area drilling data；
Step 2, the seismic response forward modeling analysis of work area individual well target zone grey matter rock petrofacies is carried out, obtains grey matter rock petrofacies and earthquake
Response relation formula；
Step 3, asking for grey matter rock petrofacies influences the seismic properties correction body of reservoir prediction；
Step 4, reservoir Application of Logging-constrained Inversion and relative earthquake attributes extraction are carried out；And
Step 5, data is bored in fact with reference to drilling well, essence is carried out using the Application of Logging-constrained Inversion data volume after correction or earthquake attribute volume
Thin description；
In step 1, target zone grey matter rock petrofacies are carried out with reference to interval transit time, natural potential, a variety of well-log informations of natural gamma
Identification, statistical lithofacies thickness, ultimately form grey matter rock petrofacies flat distribution map；
In step 2, the seismic response forward modeling analysis of work area individual well target zone grey matter rock petrofacies is completed, grey matter rock petrofacies are replaced just
Seismic properties variable y and grey matter rock petrofacies thickness x is closely related after normal country rock, more well fitting seismic properties variables and grey matter rock rock
Phase thickness variable draws relational expression：y=289.73e0.0881x, so as to clear and definite grey matter rock petrofacies and seismic response relational expression；
In step 3, according to grey matter rock petrofacies and seismic response relational expression y=289.73e0.0881x, under the control of grey matter rock petrofacies
Grey matter rock petrofacies are asked in computing influences the seismic properties correction body of reservoir prediction, and association attributes school is carried out to three dimensional seismic data
Just；
In step 4, reservoir Application of Logging-constrained Inversion and relative earthquake attribute are carried out using the 3-d seismic data set after correction
Extraction, 3-d seismic data set can more Accurate Prediction reservoir after correction.
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| CN107103165B (en) * | 2017-06-02 | 2020-12-01 | 西南石油大学 | Method for calculating density of steep dip shear crack line of oil field reservoir |
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