CN106842293A - Balanced cross section restoration methods based on delta front paleotopography feature - Google Patents
Balanced cross section restoration methods based on delta front paleotopography feature Download PDFInfo
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- CN106842293A CN106842293A CN201510883663.7A CN201510883663A CN106842293A CN 106842293 A CN106842293 A CN 106842293A CN 201510883663 A CN201510883663 A CN 201510883663A CN 106842293 A CN106842293 A CN 106842293A
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Abstract
The invention discloses a kind of balanced cross section restoration methods based on delta front paleotopography feature, on the basis of fine structural interpretation, selection has the seismic profile of typical geology feature, using the when deep relation of this area, selected seismic profile is converted into geologic section；Calmodulin binding domain CaM deposition characteristicses, mark off delta plain facies, delta front sub-facies and prodelta parfacies on section.Delta front balanced cross section recovery is carried out for the not synsedimentary phase time, until completing the paleotopography section integrated compensation work on all delta front stratum, the final delta front structure development Evolutionary History section of output, for follow-up sedimentary evolution history is analyzed, structural feature quantitative study is laid a solid foundation.
Description
Technical field
It is special the present invention relates to the restoration methods of the delta front Gu angle of gradient in Seismology and Geology information Processing Technology field
It is not to be related to the delta front Gu angle of gradient in the balanced cross section restoration methods based on delta front paleotopography feature.
Background technology
So-called balanced cross section recovers to refer to the stratum deforming on period Seismology and Geology section now, by geometry principle
Rational stratum is all recovered to not deform the section of state.During balanced cross section recovers, whether section balances
The standard whether inspection structure interpretation holds water is turned into, balanced section technique can be used to oil-gas bearing basin structural feature
Quantitative analysis is carried out, quickly, effectively and reasonably recovers basin-mountain frame work history, for oil-gas exploration provides reliable foundation.
During traditional section integrated compensation, for the recovery of each deposition phase time, typically simply evened up using top surface, layer
The mode that layer is peeled back to carries out stratum recovery, and seldom considers palaeogeomorphic original form.This traditional restoration methods, in deposition
Stablize relatively in marine bed, can substantially reflect the structural evolution feature of this area.But break for structural feature complexity terrestrial facies
Fall into for basin, because fault combination pattern is complicated on its section, depositional environment change is various, especially in deposition by ancient ground
Looks are controlled under obvious the front-delta deposition background, leading edge lithosomic body of each phase time develop certain paleotopography slope it
On, and not different, the traditional section integrated compensation technology of the same period time leading edge lithosomic body Gu angle of gradient, it is impossible to accurate response three
The paleotopography slope change feature of angle continent leading edge many phases time lithosomic body, it is impossible to reflect basin-mountain frame work history exactly, cause right
Oil-gas bearing basin tectonic movement feature quantitative analysis error is larger.
The content of the invention
The problem that the purpose of the present invention exists aiming at prior art, provides a kind of ancient to the front-delta deposition stratum
The accurate balanced cross section restoration methods based on delta front paleotopography feature asked for of the angle of gradient.
The technical scheme is that：
On the basis of fine structural interpretation, selection has the seismic profile of typical geology feature, using the when deep relation of this area,
Selected seismic profile is converted into geologic section；Calmodulin binding domain CaM deposition characteristicses, mark off delta plain sub- on section
Phase, delta front sub-facies and prodelta parfacies.To the geological knowledge of whole deltaic facies development characteristics based on more than,
According to delta front sub-facies during depositing, the subhorizontal stratigraphic distribution in delta plain facies development area is special
Levy, calculate delta front angle of gradient when delta plain to be returned to level（As delta front formation compaction is made
With the angle of gradient in the primary deposit period before recovery）；Further according to deposition compaction theory, provided with petrographical analysis chemical examination data, drilling well
Based on material and log data, determine that the compaction of this area recovers ratio, and then slope during recovery the front-delta deposition
Degree angle is ancient angle of gradient during primary deposit.Then, above step is repeated, carrying out delta front for the not synsedimentary phase time puts down
Weighing apparatus section recovers, until completing the paleotopography section integrated compensation work on all delta front stratum, exports final triangle
Continent leading edge structure development Evolutionary History section, is follow-up sedimentary evolution history analysis, and structural feature quantitative study is laid a solid foundation.
Balanced cross section restoration methods based on delta front feature of the invention, it is adaptable to terrestrial lake basin delta front
Deposition is recovered, and its emphasis considers feature of the delta front development on paleotopography slope, realizes the front-delta deposition ground
Accurate the asking for of the ancient angle of gradient of layer, the precision of tectonic movement feature quantitative analysis is more credible so that for delta front area
The result of the structural evolution analysis in domain is closer to objective reality.
Brief description of the drawings
Fig. 1 present invention is based on delta front paleotopography structural evolution method flow diagram；
Fig. 2 present invention is based on delta front paleotopography structural evolution cross-sectional views；
Fig. 3 routine delta structure Evolution Series profiles.
Specific embodiment
Below by drawings and Examples, the present invention will be further described.
The first step：On the basis of fine structural interpretation, the seismic profile with typical geology feature is chosen.
Second step：When convert deeply, selected seismic profile is converted into geologic section（Stratum A, B and C are respectively with table
The delta stratum that the synsedimentary phase is not deposited）.
3rd step：The deposition phase-plane diagram completed with reference to being worked by other, marks off triangle on geologic section
The border of continent Plain parfacies and delta front sub-facies（The delta plain angle of gradient is β, and the delta front angle of gradient is α, Fig. 2
（a））.
4th step：Based on delta plain, in each phase primary deposit, paleotopography is in the deposition characteristicses of level of approximation,
Using traditional balanced cross section recovery technology, delta plain facies are evened up（Now delta plain angle of gradient β '=0）, calculate
Go out angle of gradient during now the front-delta deposition（α′）Fig. 2（b）.
5th step：According to the compacting factor of this area, delta front Gu angle of gradient when renwing stratum is deposited（α′′）Figure
2（c）.
6th step：The four, the 5th steps are repeated, the construction for carrying out other deposition phases using balanced section technique recovers.
7th step：Complete each phase structural feature to recover, output construction evolved stages history section（Fig. 2）.
Conventional balanced section technique is using the method for simple flattening come the backstripping analysis of complete layer position（Fig. 3）.Base
In the balanced cross section restoration methods of delta front feature, the front-delta deposition body is make use of in the mistake advanced to lake basin direction
Subhorizontal this geological knowledge in journey intermediate cam continent Plain parfacies development area, in combination layer compaction recovers, and accurately asks
The ancient angle of gradient of delta front sub-facies development area is taken, it is ensured that each phase datum plane when balanced section technique is recovered
Accuracy, is capable of the feature of more realistically reflecting regional structural evolution, and then strong and weak and tectogenetic fixed for fault activities
Amount analysis provides reliable basis, and then for exploration of oil and gas field provides strong technical guarantee.
Claims (1)
1. the balanced cross section restoration methods of delta front paleotopography feature are based on, it is characterised in that including：In fine structures solution
On the basis of releasing, selection has the seismic profile of typical geology feature, using the when deep relation of this area, selected earthquake is cutd open
Face is converted into geologic section；Calmodulin binding domain CaM deposition characteristicses, mark off delta plain facies, delta front sub-facies on section
And prodelta parfacies；It is sub- according to delta front to the geological knowledge of whole deltaic facies development characteristics based on more than
During depositing, the subhorizontal stratigraphic distribution feature in delta plain facies development area is calculated triangle
Continent Plain returns to delta front angle of gradient during level；Further according to deposition compaction theory, with petrographical analysis chemical examination data, bore
Based on well data and log data, determine that the compaction of this area recovers ratio, and then when recovering the front-delta deposition
The angle of gradient；Then, above step is repeated, delta front balanced cross section recovery is carried out for the not synsedimentary phase time, until complete
Paleotopography section integrated compensation into all delta front stratum works, and exports final delta front structure development and develops
History section.
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Cited By (3)
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| CN107621662A (en) * | 2017-08-24 | 2018-01-23 | 中国石油天然气股份有限公司 | Method and device for recovering distance of exposed point of extrusion fracture zone |
| CN109975872A (en) * | 2019-04-26 | 2019-07-05 | 河南理工大学 | A method of utilizing Croel DRAW software direct organization balanced cross section |
| CN111913232A (en) * | 2020-08-04 | 2020-11-10 | 中国石油大学(北京) | Stratum balance profile recovery method and device |
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| CN104933276A (en) * | 2014-03-19 | 2015-09-23 | 中国石油化工股份有限公司 | Method for quantitatively recovering original sedimentary gradient of delta front |
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| CN104933276A (en) * | 2014-03-19 | 2015-09-23 | 中国石油化工股份有限公司 | Method for quantitatively recovering original sedimentary gradient of delta front |
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| CN107621662A (en) * | 2017-08-24 | 2018-01-23 | 中国石油天然气股份有限公司 | Method and device for recovering distance of exposed point of extrusion fracture zone |
| CN109975872A (en) * | 2019-04-26 | 2019-07-05 | 河南理工大学 | A method of utilizing Croel DRAW software direct organization balanced cross section |
| CN111913232A (en) * | 2020-08-04 | 2020-11-10 | 中国石油大学(北京) | Stratum balance profile recovery method and device |
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