CN104199124B - Mixed phase stratigraphic analysis method and apparatus - Google Patents

Mixed phase stratigraphic analysis method and apparatus Download PDF

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CN104199124B
CN104199124B CN201410424286.6A CN201410424286A CN104199124B CN 104199124 B CN104199124 B CN 104199124B CN 201410424286 A CN201410424286 A CN 201410424286A CN 104199124 B CN104199124 B CN 104199124B
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郭彦如
赵振宇
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Petrochina Co Ltd
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Abstract

The invention provides a kind of mixed phase stratigraphic analysis method and apparatus, wherein, the method includes：Longitudinal stratum time series in mixed phase stratigraphy study area is set up by extinct plants and animal stratigraphic analysis method；According to isotopic distribution etc. in Geologic Time, geologic record and stratum, longitudinal stratum time series is corrected；Across comparison is carried out to stratum according to research area stratigraphic sequence, chronological change framework net when setting up research area two dimension etc.；According to chronological change framework net during described two dimension etc. and well logging earthquake integration interpretation model, research area three-dimensional geological model is set up；Mixed phase stratigraphic analysis is carried out to the research area according to the three-dimensional geological model.The present invention effectively increases the accuracy of mixed phase stratigraphic partition and correlation result by normative techniqueflow.

Description

Mixed phase stratigraphic analysis method and apparatus
Technical field
The present invention relates to technical field of geological exploration, more particularly to a kind of mixed phase stratigraphic analysis method and apparatus.
Background technology
Used as a core technology of geological exploration field, classification and correlation is the weight of all research work all the time Point, traditional classification and correlation method mainly have several as follows：
1) lithostratigraphy method, the method are only applicable to a small range, are local stratigraphic unit, generally divide rotten Rock and volcanic rock more practical, often produce when wearing in sedimentary rock partition process.
2) biostratum method, the method can set up zones of different or even global range in classification and correlation with And year is determined in sxemiquantitative, it is adaptable to which geophysical information is deficient and studies degree lower ground area, but paleontologic analysis are deposited by Gu Ambient influnence is larger, and stratum across comparison is difficult.
3) elemental geochemistry method, the method are come with the isotopic ratio preserved in stratum and micronutrient levels change etc. Division and contrast stratum, but the acquisition of calibration curve and the selection of canonical profile be affected by human factors larger.Meanwhile, chemical element Abnormal have multi-solution, causes region element Anomalies contrast difficult.
4) event strata method, the method are applied to tectonic activity complex area, with easily identification, etc. when effect substantially etc. Feature, in conjunction with isotope tracling method technology, can effectively define stratum absolute age.But for deposition stability region, party's rule nothing Method is used.
5) SEQUENCE STRATIGRAPHIC method, is to combine biostratigraphy, isotope stratigraphy, magnetostratigraphy, sedimentology and construction The newest fruits of geology etc..But the method originates from marine bed, Continental Facies Stratigraphy has the chaotic and sequence hierarchy of sequence interface The problems such as identification difficulty is big, causes which extensively to apply limited.
6) other methods also have global sea mutation analysis method, ecostratigraphic method, earthquake-Log Strata method, molecule ground Layer method, High-resolution Cyclostratigraphy method, quantitative stratigraphy method, Quaternary Period pedostratigraphy method and climatic stratification etc..
At present when classification and correlation is carried out, be simply enumerating for one or more methods above-mentioned mostly, lack effectively, Standard operation flow process, the particularly division to complicated geological environment mixed phase stratum and contrast, such as cratonic margin geology Environment, simply enumerating for this several method are difficult to reach the effective division to stratum and contrast.
Content of the invention
Embodiments provide a kind of geologic prospecting method in research area, in order to effectively improve mixed phase STRATIGRAPHIC DIVISION and The accuracy of comparing result, the method include：
Longitudinal stratum time series in mixed phase stratigraphy study area is set up by extinct plants and animal stratigraphic analysis method；
Longitudinal contrast is carried out to the stratum in the research area according to Geologic Time and geologic record, according to longitudinal comparing result Adjust longitudinal stratum time series；
By isotopic distribution in research area stratum, the longitudinal stratum time series after adjustment is corrected；
After being corrected to longitudinal stratum time series, the sequence further according to research area stratum carries out horizontal stroke to stratum To contrast, chronological change framework net when setting up the two dimension in the research area etc.；
According to chronological change framework net during described two dimension etc. and well logging-earthquake integration interpretation model, research area is set up Three-dimensional geological model；
Mixed phase stratigraphic analysis is carried out to the research area according to the three-dimensional geological model.
In one embodiment, longitudinal stratum time in mixed phase stratigraphy study area is set up by extinct plants and animal stratigraphic analysis method Sequence, including：
Obtain the extinct plants and animal species on research area stratum；
The extinct plants and animal species of acquisition is carried out with the Skeletal band standard for pre-building or Skeletal band data bank Contrast, determines the geological epoch in the research area.
In one embodiment, during the geological epoch in the research area is determined, if lacking same quasi-fossil, Geological epoch is determined by the way of transboundary contrasting, or, geological epoch is determined by the way of neighbour's contrast.
In one embodiment, the log parameter in the well logging-earthquake integration interpretation model include following at least it One：Photoelectric absorption cross-section index, natural gamma, natural potential, interval transit time, density log, depth are lateral and shallow lateral.
In one embodiment, mould is explained according to chronological change framework net during described two dimension etc. and well logging-earthquake integration Type, sets up the three-dimensional geological model in research area, including：
Equation is explained according to the rock forming mineral content quantitative in the well logging-earthquake integration interpretation model, is determined described The rock mineral composition percent by volume in research area；
The three-dimensional geological model is compared according to the rock mineral composition volume basis for determining to be adjusted, described to improve The precision of three-dimensional geological model.
In one embodiment, the rock forming mineral content quantitative in the well logging seismic interpretation model explains that equation is：
Wherein, Δ t represents acoustic travel time logging, ρbRepresent density log, ΦNRepresent neutron well logging, Φ represents blowhole Degree, V1、V2、V3Represent rock mineral composition percentage by volume, Δ tf、ρf、ΦNfRepresent pore-fluid parameter, Δ tma、ρma、ΦNma Represent rock skeleton parameter, a, b, c, d represent improvement factor.
The embodiment of the present invention additionally provides a kind of geological prospecting device in research area, in order to effectively improve mixed phase STRATIGRAPHIC DIVISION With the accuracy of comparing result, the device includes：
Module is set up, for longitudinal stratum time sequence in mixed phase stratigraphy study area is set up by extinct plants and animal stratigraphic analysis method Row；
Adjusting module, for carrying out longitudinal contrast, root according to Geologic Time and geologic record to the stratum in the research area Longitudinal stratum time series is adjusted according to longitudinal comparing result；
Correction module, for by isotopic distribution in research area stratum, to the longitudinal stratum time after adjustment Sequence is corrected；
Two dimensional model sets up module, for after being corrected to longitudinal stratum time series, further according to the research area The sequence on stratum carries out across comparison to stratum, chronological change framework net when setting up the two dimension in the research area etc.；
Three-dimension modeling module, for according to chronological change framework net during described two dimension etc. and well logging-earthquake integration Interpretation model, sets up the three-dimensional geological model in research area；
Analysis module, for carrying out mixed phase stratigraphic analysis according to the three-dimensional geological model to the research area.
In one embodiment, the module of setting up includes：
Biological species acquiring unit, for obtaining the extinct plants and animal species on research area stratum；
Determining unit, for carrying standard or Skeletal by the extinct plants and animal species of acquisition and the Skeletal for pre-building Band data bank is contrasted, and determines the geological epoch in the research area.
In one embodiment, the determining unit is during the geological epoch in the research area is determined, if lacked Few same quasi-fossil, then determine geological epoch by the way of transboundary contrasting, or, geology year is determined by the way of neighbour's contrast Generation.
In one embodiment, the log parameter in the well logging-earthquake integration interpretation model include following at least it One：Photoelectric absorption cross-section index, natural gamma, natural potential, interval transit time, density log, depth are lateral and shallow lateral.
In one embodiment, the three-dimension modeling module includes：
Rock composition percentage determining unit, for according to the rock ore deposit in the well logging-earthquake integration interpretation model Thing content quantitative explains equation, determines the rock mineral composition percent by volume in the research area；
Adjustment unit, is adjusted for comparing the three-dimensional geological model according to the rock mineral composition volume basis for determining Whole, to improve the precision of the three-dimensional geological model.
In one embodiment, the rock forming mineral content quantitative in the well logging seismic interpretation model explains that equation is：
Wherein, Δ t represents acoustic travel time logging, ρbRepresent density log, ΦNRepresent neutron well logging, Φ represents blowhole Degree, V1、V2、V3Represent rock mineral composition percentage by volume, Δ tf、ρf、ΦNfRepresent pore-fluid parameter, Δ tma、ρma、ΦNma Represent rock skeleton parameter, a, b, c, d represent improvement factor.
In embodiments of the present invention, there is provided a kind of geologic prospecting method in research area, extinct plants and animal stratigraphic analysis is first passed through Method sets up longitudinal stratum time series in mixed phase stratigraphy study area, then passes sequentially through event strata and isotope chemistry ground again Layer is adjusting longitudinal stratum time series, and determines two-dimentional stratigraphic framework net by SEQUENCE STRATIGRAPHIC, finally again by well logging earthquake Joint interpretation method sets up out the three-dimensional geological model in research area, such that it is able to effectively determine the deposition distribution shape inside basin Condition, by normative techniqueflow, effectively increases the accuracy of mixed phase stratigraphic partition and correlation result.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not Constitute limitation of the invention.In the accompanying drawings：
Fig. 1 is the method flow diagram of the geologic prospecting method in the research area of the embodiment of the present invention；
Fig. 2 is the structured flowchart of the geological prospecting device in the research area of the embodiment of the present invention.
Specific embodiment
Inventor is after making a concrete analysis of to current several conventional stratigraphic partition and correlation method, it is proposed that one Stratigraphic partition and correlation method is planted, with the accurate geological prospecting in realization area, is made a concrete analysis of as follows：
1) lithostratic unit, is that basis can be observed and present overall consistent lithology (or lithology combination), go bad journey Degree or architectural feature, and be adjacent to the three dimensions lithosome that interlayer relation defines and recognizes.One rock ground Layer unit can be made up of one or more sedimentary rock, effusive rock or its metamorphic rock.Lithostratic unit include " group ", " group ", " section " and " layer " level Four.But, the method is only applicable to a small range, is local stratigraphic unit, with chronological change circle, System, system, rank are not also corresponded with biostratic unit nothing mutual corresponding relation.Usual Metamorphic Rock and volcanic rock are more Practicality, when in sedimentary rock partition process, often generation is worn.
2) biostratic unit, is the stratigraphic unit using the uniformity of contained fossil or biological characteristic as partitioning standards, The foundation for dividing a biostratic unit is diversified, all kinds according to fossil having, or only according to a certain spy Different kind quasi-fossil, had combines according to the coexisting with nature of a certain special fossil, and had is according to a Fossil unit or more The continuity scope of Fossil unit, the enrichment condition according to fossil having, the morphological feature according to fossil having, some bases Habit and mode shown by fossil, have according to biological evolution developing stage etc..One biostratic unit set up one Its foundation, current common combinations band, range zone and acme zone will be described surely.Biostratic unit is different from chrono-stratigraphic unit, Both boundary lines are sometimes consistent, and the former passes through the latter sometimes.Biostratic unit is also different from lithostratic unit, sometimes both Boundary line is consistent, then passes through mutually sometimes.From extinct plants and animal contrast from the point of view of, zones of different or even global range can be set up in stratum Division and contrast with determine year, it is adaptable to the deficient and research degree of complex geologic conditions, geophysical information lower ground area, therefore, Extinct plants and animal Strata Comparison should based on, can be to primarily determine that big set stratum age provides important foundation.
3) chemostratigraphy, is stratigraphic(al) one new subdiscipline, is concrete application of the geochemistry in stratigraphy, Mainly come Division and contrast stratum with the isotopic ratio preserved in stratum and micronutrient levels change etc., for example：18O/16O and13C/12The isotope ratio value changes of C, the change of the micronutrient levels such as strontium, boron, manganese, and universe event is made outside ground Increase of iridium content etc. in the deposit for becoming.Elemental geochemistry is according to chemical composition, characteristic element change is how many, size and point high, In, the inferior different stage of low class.High class time anomalous surface is close to " group " level interface, in, low class time and " section " or cyclicity sedimentary facies When.In recent years, oxygen and carbon isotopes analysis is widely used in Stratigraphic Division And Correlation and Boundary Events research, to the ancient deposition ring of analysis Border, the ancient sea level variability of understanding, sea floor spreading speed, colcanism, biology die out replacement event and paleo-climate change etc. entirely Ball event tool is of great significance.Although the method is more practical, also there is the limitation that itself is intrinsic.Formation chemistry unit Plain change curve contrast must rely on a calibration curve, but human factor is received in the acquisition of calibration curve and the selection of canonical profile Impact is larger.Meanwhile, chemical element has multi-solution extremely, particularly belongs to the stratigraphic regionalization of different plates, element anomalies Contrast is more difficult.With the progressively implementation of the geological exploration field marketization, cost be also have to take into account that one crucial because Element.
4) magnetostratigraphy, is concrete application of the paleomagnetism in stratigraphy, by the survey of rock natural remanent magnetism Fixed, obtain the change in polarity in earth's magnetic field to study stratum.The polarity consistent with present earth magnetism field direction is forward direction, in opposite direction For reverse, forward and reverse sequentially lined up in entirely history, that is, define time-scale geomagnetic polarity.Establish magnetic Property stratum polarity unit, be the substance of MAGNETIC STRATIGRAPHY work.The basic terms of magnetostratigraphic polarity unit, are MAGNETIC STRATIGRAPHY Polarity zone, Qi Ding is the bottom of with all with polarity-reversal horizon or polarity reversal band as boundary line.Generally, there are 3 kinds of bases in magnetostratigraphic polarity unit This pattern：The first is the stratum with overall single polar orientation, is for second to replace change with negative sense with forward direction Stratum, the third are mainly positively or negatively, have the stratum of time one-level opposite polarity therebetween again.According to them in stratigraphic section In scope and importance, magnetostratigraphic polarity unit is segmented into different ranks, such as：Polarity micro-strip, polarity subzone, polarity The super band of band, polarity and the huge band of polarity etc..The method is suitable for stratigraphic regionalization contrast between zones of different, different plates, in basin Yardstick, faces polarity identical stratum and cannot determine the age or can not refine the problem in age boundary line, particularly geologic fluids Exploration Domain requires today of meticulous depiction, it is clear that the precision of magnetostratigraphy far can not meet.Therefore, the method is only suitable for Big region and trans-regional provinces in horizontal strata correlation in big set stratum.
5) event stratigraphy, using can stay in the earth formation certain marking being distributed in a big way of being identified etc. when Geologic event comes Division and contrast stratum, and any geologic event is always intended to special by deposition characteristicses, Geochemical Characteristics or extinct plants and animal Levy etc. and to leave the marking in the earth formation, can be identified through intensive research and determine.Obviously, idealization Strata Comparison is even global " when waiting " contrast in big region.Therefore, selecting to be available for the geologic event of big region isochronic correlation When, should first-selected those be distributed on a large scale, paroxysmal, short-period, the geologic event that can be identified can be left in the earth formation. From the practical standpoint of Stratigraphic Division And Correlation, can be corresponding with deposition event, chemical event, biological event, mark off three classes Event stratigraphy unit：Deposition event unit, chemical event unit and biological event unit.Event strata is in specific period, specific Stratum has abrupt effect.Particularly in tectonic activity complex area, volcano coagulate grieshoch have easily identification, etc. timeliness The features such as fruit is obvious, in conjunction with isotope tracling method technology, can effectively define stratum absolute age, but for deposition stability region, should Method cannot obtain desired effect.
6) sequence stratigraphy, originates from the eighties in last century, is just subject to the extensive pass of domestic and international geology educational circles once formation Note, and cause greatly vibrations in geology, sedimentology and all scientific domains relevant with sedimentary rock, this be due to sequence ground Layer learns the basic principle for changing world's cognition stratigraphic record, has started the new stage that the mankind understand the history of earth.Sequence Stratigraphy grows up on the basis of seismic stratigraphy, and it summarises the basic conceptand methodology of seismic stratigraphy, and Combine the newest fruits of biostratigraphy, isotope stratigraphy, magnetostratigraphy, sedimentology and structural geology.Which is basic Principle is tectonic movement, the whole world definitely change on sea level and the result of sediment supply speed comprehensive function, generates stratum Record, also referred to as formation signal.These records reflect scale, power, duration and the coverage of above-mentioned all effects. Wherein, tectonism and the combination of sea level variability, cause global relative sea level changes, and it controls deposit and is formed Latent space.Tectonism and the combination of climate change, control type and the deposition quantity of deposit, and can accommodate sky Between in be deposited the ratio of thing filling, but the deposition in river and marine environment, and due to current and landform and the depth of water Between influence each other and cause different lithofacies distributions.Above-mentioned effect can be divided into six grades by its scale：Duration is more than 50000000 years be referred to as first-order cycle, 500～50,000,000 years for second stage cycle, 50～5,000,000 years for third-order cycle, 10～ 500000 years for the level Four cycle, 1～100,000 years for the Pyatyi cycle, be six grades of cycles less than 10,000 years.
7) other householder methods for being used for setting up high accuracy chronological change screen work also have：SEQUENCE STRATIGRAPHIC and global sea become Change analytic approach, ecostratigraphic method, earthquake-Log Strata method, elemental geochemistry method, Molecular Stratigraphy method, High-resolution Cyclostratigraphy method, quantitative stratigraphy Method, Quaternary Period pedostratigraphy method and climatic stratification etc..
Strata Comparison mainly carries out geologic body space by the various information of formation rock and determines year and a kind of hand that follows the trail of Section, specifically which kind of characteristic information which area carrying out effective classification and correlation in using should specifically divide according to actual conditions Analysis, however, from the point of view of current classification and correlation, being simply enumerating for various methods mostly, lacks the technical flow of normalization Journey and constraint, especially for the division on mixed phase stratum and contrast under complicated geological environment, for example：Single carbonate lithology is covered greatly Regional and regional containing gypsum-salt rock, still lack effective lithology high accuracy means of identification and Division and contrast flow process so far.
Based on the above-mentioned analysis to various STRATIGRAPHIC DIVISION methods, inventor considers above-mentioned various STRATIGRAPHIC DIVISION methods Quality, and situation about each being adapted to, propose and establish a kind of new Stratigraphic Division And Correlation flow process and device, right to realize The geological prospecting in research area, to solve many difficult problems present in classification and correlation process in prior art, as Fig. 1 institute Show, comprise the following steps：
Step 101：Longitudinal stratum time series in mixed phase stratigraphy study area is set up by extinct plants and animal stratigraphic analysis method；
Step 102：Longitudinal contrast is carried out to the stratum in the research area according to Geologic Time and geologic record, according to longitudinal direction Comparing result adjusts longitudinal stratum time series；
Step 103：By isotopic distribution in research area stratum, the longitudinal stratum time series after adjustment is entered Row correction；
Step 104：After being corrected to longitudinal stratum time series, further according to research area stratum sequence over the ground Layer carries out across comparison, chronological change framework net when setting up the two dimension in the research area etc.；
Step 105：According to chronological change framework net during described two dimension etc. and well logging-earthquake integration interpretation model, set up The three-dimensional geological model in research area；
Step 106：Mixed phase stratigraphic analysis is carried out to the research area according to the three-dimensional geological model.
In the above-described embodiments, there is provided a kind of geologic prospecting method in research area, extinct plants and animal stratigraphic analysis side is first passed through Method sets up longitudinal stratum time series in research area, then passes sequentially through event strata again and isotope chemistry stratum is vertical to adjust To stratum time series, and two-dimentional stratigraphic framework net is determined by SEQUENCE STRATIGRAPHIC, finally again by the earthquake joint interpretation side that logs well Method sets up the three-dimensional geological model in research area, such that it is able to effectively determine the deposition distribution situation inside basin, by specification Property techniqueflow, solve in prior art and combined carrying out to stratum using the simple of several stratigraphic partition and correlation methods The low problem of division and the accuracy for contrasting and causing, has reached the accuracy for effectively improving mixed phase stratigraphic partition and correlation result Purpose.
Specifically, mixed phase stratigraphy study area is set up longitudinally by extinct plants and animal stratigraphic analysis method in above-mentioned steps 101 Layer time series, can include：Obtain the extinct plants and animal species on research area stratum；By the extinct plants and animal species of acquisition with build in advance Vertical Skeletal band standard or Skeletal band data bank are contrasted, and determine the geological epoch in the research area, its In, the above-mentioned Skeletal band standard for pre-building can carry data bank and authoritative ground according to international standard paleontological fossil Square data bank is set up.
Occur during in view of extinct plants and animal Strata Comparison that research area lacks the situation of same quasi-fossil, or research Area cannot be all contrasted with the fossil standard in standard, in this case, can be adopted and transboundary be contrasted with maturation zone, or The mode contrasted with neighboring regions carries out extinct plants and animal Strata Comparison, tentatively to set up parent sequence section longitudinal direction time series and sentence Determine the basis of stratum age.That is, during the geological epoch in research area is determined, if lacking same quasi-fossil, can adopt The mode for transboundary contrasting, or, geological epoch is determined by the way of neighbour's contrast.
Specifically, the well logging in above-mentioned steps 105-earthquake integration interpretation model is mainly by log and earthquake number Constitute according to body two parts, the log parameter in the interpretation model can include but is not limited at least one of：Photoelectric absorption is cut Facial index, natural gamma, natural potential, interval transit time, density log, depth are lateral and shallow lateral.
In order that the precision of three-dimensional geological model is higher, can be by above-mentioned well logging-earthquake integration interpretation model In rock forming mineral content quantitative explain equation determining the rock mineral composition percent by volume in the research area, then basis The percentage of determination being adjusted to three-dimensional geological model, the three-dimensional geological model higher so as to obtain accuracy, you can with Using the log in well logging-seismic interpretation model (i.e. well-shake integration interpretation model) and seismic data cube etc., it is right to realize Effective parsing of the carbonate reservoir that complexity is high, Lateral heterogeneity is strong, can reflect bed boundary information well And its attribute of underlying geologic body, parameter improvement factor can be introduced to characterize log interpretation model, specifically, earthquake solution of logging well Release the rock forming mineral content quantitative in model and explain that equation is：
Wherein, Δ t represents acoustic travel time logging, ρbRepresent density log, ΦNRepresent neutron well logging, Φ represents blowhole Degree, V1、V2、V3Represent rock mineral composition percentage by volume, Δ tf、ρf、ΦNfRepresent pore-fluid parameter, Δ tma、ρma、ΦNma Represent rock skeleton parameter, a, b, c, d represent improvement factor.
The angle of slave module below, how illustrate carries out stratigraphic partition and correlation：
Relate generally to the present invention in the method and have 5 modules：First module is extinct plants and animal stratum module, the second module For event strata module, the 3rd module is isotope chemistry stratum module, and the 4th module is SEQUENCE STRATIGRAPHIC module, and the 5th module is Well logging-earthquake joint interpretation module, wherein, it is mark, the earth that the contrast of extinct plants and animal stratum module is basic, important geologic event It is core that chemical data is supplementary, sequence interface identification is crucial and well logging-earthquake joint interpretation.This 5 modules above-mentioned are followed Sequence is progressive, is complementary to one another, chronological change screen work net when finally constructing basin high accuracy etc..
Wherein, in the module of extinct plants and animal stratum, there are two key factors：One is international standard and authoritative place extinct plants and animal The foundation of fossil zone data bank, two is that extinct plants and animal contrast order is difficult to overturn, and should follow former by the contrast in big region to zonule Then.Event strata module mainly applies volcanic tuff layer at present, not only easily recognizes in the wild, and can effectively make up ancient life The geology that thing is incomplete and brings is blank, particularly the strong and paleo-climate change of tectonic activity frequently area effect substantially, while tying Volcanic rock dating technology is closed, Strata Comparison precision is less than 1Ma.Isotope chemistry stratum module mainly applies carbon, oxygen, three kinds of strontium same Position element carries out total rock analysis, similar with event strata module, is contrasted with international standard section isotopic curves first, secondly Contrasted with research maturation zone parent sequence section, the module has three key points：One is international and regional standard parent sequence section The foundation in Isotopic Data storehouse, two to be that certainty of measurement is affected by artificial sampling interval larger, and usual certainty of measurement is less than 0.5Ma, Three is that isotope anomaly is big by Geological Environment Influence factor, that is, there is multi-solution, isotope anomaly band and the first two often occur The phenomenon that geologic body or bed boundary in module is not matched that.SEQUENCE STRATIGRAPHIC module is primarily present the identification of each rank sequence interface Degree is low and the chaotic problem of across comparison easily occurs, and therefore the module must be set up carrying out on above three module basis Stratum across comparison, could effectively expand a restriction for section/parent sequence section, chronological change lattice when tentatively setting up basin two dimension etc. Frame net.Well-earthquake joint interpretation module mainly applies well logging-earthquake integration to explain, completes industry on the basis of front four step Chronological change screen work net when changing high-precision three-dimensional etc., in the module, Logging Curves AC, RLLd and RLLs in gypsum-salt rock and New connotation is had been assigned in paleocrust of weathering identification process, and establishes gypsum-salt rock content quantitative in new carbonate rock explain mould The determination of type, particularly improvement factor, has for the carbonate reservoir that complexity is high, Lateral heterogeneity is strong and substantially imitates Really, bed boundary information and its underlying geologic body attribute can be reflected very well.
In this example, above analysis is based on, a kind of stratigraphic analysis method is established, according to every kind of existing stratum The respective pluses and minuses of division methods determine the flow process of STRATIGRAPHIC DIVISION, i.e. the execution sequence of various STRATIGRAPHIC DIVISION methods, to obtain Optimal STRATIGRAPHIC DIVISION result.That is, by determining the STRATIGRAPHIC DIVISION flow process of specification, a point yardstick carry out step by step STRATIGRAPHIC DIVISION with right Than by point-line-face-body, and finally establishing complicated geological environment mixed phase classification and correlation method, going to work so as to build Chronological change screen work net during industry high-precision three-dimensional etc..In the well logging-earthquake joint interpretation module of this example, not only to conventional survey Well curve imparts new stratum connotation, and has quantified log interpretation model, and particularly the determination of improvement factor and foundation, right There is positive effect in the carbonate reservoir that complexity is high, Lateral heterogeneity is strong, bed boundary information can be reflected very well And its underlying geologic body attribute.
The present invention is mainly suitable for the division on mixed phase stratum and contrast, particularly structure under cratonic margin complicated geological environment The activity of making is strong, marine facies/terrestrial facies interaction and containing big set evaporite rocks series ' area, can with popularization and application to Ordos Basin, Tarim Basin and multiple series of strata in the Sichuan Basin.
Specifically, the workflow below to these modules is specifically described：
1) extinct plants and animal stratum module, the module are the bases of classification and correlation, can be according to international standard and region Characteristic, can select different extinct plants and animal species, for example：Graptolite, conodont, trilobita etc., and when finally setting up longitudinal stratum Between sequence.International chronostratigraphic division scheme is that STRATIGRAPHIC DIVISION is become 5 ranks, be followed successively by boundary, be, system, rank, band.Current state More complete Skeletal band standard or Skeletal band data bank is had been set up on border, therefore, in different plates, difference The Skeletal of region development, should be contrasted with international standard first, and primarily determine that the geological epoch in research area, generally most Little error is more than 1～1.5Ma.If research area lacks same quasi-fossil, can study with North America mid-continental, North Atlantic Ocean area etc. Maturation zone is transboundary contrasted, and usual minimal error is more than 2～3Ma.If research area all can not with above-mentioned zone fossil standard Contrast, then carry out " neighbour " contrast with research area craton other regions internal, and the age by " neighbours " determines research area The substantially age, usual error is larger.In the present invention, extinct plants and animal contrast module is by two key factors：One is that international standard is ancient raw Thing fossil zone data bank and the foundation in authoritative local data storehouse, two is that contrast order is difficult to overturn, and should follow by big region extremely The contrast principle of zonule.The module be tentatively set up parent sequence section longitudinal direction time series and judge stratum age the soldier at the head of a formation with Basis, in most cases can effectively identify lithostratigraphy rank to group and group.
2) event strata module, event strata are the important symbols of classification and correlation, and which utilizes geologic event and ground Matter records to contrast stratum and determine stratigraphic boundary, and sudden change or catastrophic variation event is acquired a special sense in stratigraphy study.Wherein, Event strata had both had high-resolution, had sensitivity again, and it is not limited by basin size and geological conditions complexity, front more Practical be not only easier to identification in the wild for volcanic tuff layer, and can effectively make up that extinct plants and animal is incomplete and the ground that brings Matter is blank.Meanwhile, in view of the developing rapidly of volcano dating technology, usual Strata Comparison precision is less than 1Ma, it may be said that the module It is that frequently regional (these areas are past for the strong and paleo-climate change of effective supplement, particularly tectonic activity of extinct plants and animal stratum module Toward lacking paleontologic analysis) with fairly obvious effect, directly can enter with regional tectonic activity or even global tectonics activity Row quantitative contrast, significant for adjustment extinct plants and animal chronological change longitudinal direction time series and boundary line, be to extinct plants and animal ground The effective of layer module supplements and revision.
3) isotope chemistry stratum module, the method originate from twentieth century thirties, and in recent years, oxygen and carbon isotopes are extensive Stratigraphic Division And Correlation and Boundary Events research is applied to, to analyzing palaeosedimentary environment, understanding ancient sea level variability, sea floor spreading speed Degree, colcanism, the biology global events such as replacement event and paleo-climate change tool of dying out is of great significance.The module Main application carbon, oxygen, three kinds of isotopes of strontium carry out total rock analysis, are contrasted with international standard section isotopic curves first, Contrasted secondly with research maturation zone parent sequence section.Research precision is relevant with sampling interval, outer section generally out of office and down-hole In the case of continuous sampling, certainty of measurement is less than 0.1Ma.There are three key points in the module：One is international standard parent sequence section With the foundation in regional standard parent sequence section stable isotope profile storehouse, two is that certainty of measurement is affected relatively by artificial sampling interval Greatly, three is that isotope anomaly is larger by Geological Environment Influence factor, there is isotope anomaly band with extinct plants and animal stratum module and thing The phenomenon that part stratum module geologic body or bed boundary are not matched that, therefore analyzes impact of the geological environment to isotope value very Important.But in most cases, it is effective supplement to extinct plants and animal stratum module and event strata module, is that high-precision quantitative judges The geologic body age and effectively define one of most effective means of stratigraphic boundary.But isotope geochemistry data are widely applied, no But limited by sample size, and expensive, relatively costly.In most cases, the module effectively recognizes lithostratigraphy Rank is to section.
SEQUENCE STRATIGRAPHIC module.The key of the module is the identification of sequence interface and division, the interface included in current module The form of expression mainly have several as follows, including the paleocrust of weathering, scoriform soil, river rejuvenation face (river entrenched valley), ancient Keshen Special, slope gravity stream washes away erosion surface, turbidity current corrosion function face, volcanic Events acting surface, lithology and petrofacies conversion surface in basin Deng.By the module, effectively the stratigraphic boundary of parent sequence section and auxiliary section can be extended to basin rank by across comparison, Chronological change screen work net when can tentatively set up basin two dimension etc..The module has two key points：One is that sequence interface at different levels are distinguished Knowledge and magnanimity are low, and therefore the 4th module must be set up carrying out stratum across comparison on above three module basis.By above-mentioned analysis As can be seen that first three module mainly focuses on the foundation of a section/parent sequence section chronological change sequence, and the module is then expanded The restriction of point section/parent sequence section, tentatively achieves the foundation of basin two dimension veil；The identification of sequence interface at different levels can be according to basin Set up the accuracy requirement of chronological change screen work and be adjusted, exploration cost is low, it is easy to operation identification.In most cases, the mould Block effectively recognizes the rank of rock stratum to section and layer.
Well logging-earthquake joint interpretation module, with progressively going deep into for each big sedimentary basin geologic fluids exploration and development, the earth The maturation of the precision and distribution density of physical data also more and more higher, particularly earthquake and the integrated interpretation technique of well logging, is basin Set up chronostratigraphic architecture net provide powerful guarantee.By above the step of, establish substantially basin STRATIGRAPHIC DIVISION with right Than screen work net, but still requirement on industrial application is not reached, therefore, it is necessary to well-shake integration interpretation model is applied, clearly log well bent Spatial correspondence between line, seismic data cube and sequence interface and lithosomic body, and finally set up high accuracy basin three-dimensional geological Model, so as to really understand the internal deposition distribution situation in basin.Specifically, in the module, log mainly applies Pe (light Electric absorption cross-section index), GR (natural gamma), SP (natural potential), AC (interval transit time), DEN (density log), RLLd and RLLs (deep lateral and shallow lateral) joint interpretation, wherein, AC, RLLd and RLLs quilt in gypsum-salt rock and paleocrust of weathering identification process New implication is imparted, AC is more sensitive to cream rock content in big set carbonate formation, understands according to mass data statistics, 167.5us/m≥Δt≥157us/m.Deep lateral and shallow lateral amplitude difference Δ R can effectively recognize weathering crust interface/karst Interface, according to a large amount of statistics, 238 Ω m of non-oil-gas Layer >=Δ R >=0 Ω m.
In carbonate formation, gypsum-salt rock content quantitative interpretation model is established, and specify that corresponding log response Standard and parameter improvement factor：
Wherein, Δ t represents acoustic travel time logging, ρbRepresent density log, ΦNRepresent neutron well logging, Φ represents blowhole Degree, V1、V2、V3Represent rock mineral composition percentage by volume, Δ tf、ρf、ΦNfRepresent pore-fluid parameter, Δ tma、ρma、ΦNma Represent rock skeleton parameter, a, b, c, d represent improvement factor.
In this example, by set techniqueflow divide yardstick to carry out classification and correlation step by step, by point-line-face- Body, finally establishes cratonic margin complicated geological environment mixed phase classification and correlation scheme, so as to construct high accuracy year For Stratigraphic framework, further, in well logging-earthquake joint interpretation module, not only Logging Curves are imparted with new ground Layer implication, and quantified log interpretation model, the particularly determination of improvement factor and foundation, high, laterally non-for complexity The strong carbonate reservoir of homogenieity has positive effect, can reflect bed boundary information and its underlying geologic body category very well Property.
With reference to a specific embodiment to the cratonic margin complicated geological environment mixed phase STRATIGRAPHIC DIVISION in this example It is specifically described with control methods, it is important to note, however, that the specific embodiment is merely to be better described the present invention, Inappropriate limitation of the present invention is not constituted.
In this example, illustrate by taking Ordovician in Ordos basin as an example.
1) extinct plants and animal stratum module, although recent two decades come, emphasizes that conodont is drawn on stratum with planktonic organism groups such as graptolites Divide and the importance in contrast, but in actual applications, North China Platform is not still very clear with the accurate contrast in other areas external Chu, or even also have certain difficulty with the contrast of south China deep water phase standard Graptolite Zones, the main former mark found in the phase of North China tableland Quasi- fossil class seldom, lacks comparability.Although North China Platform Lower Paleozoic strata stratum is relatively uniform, under different configuration background Layer development there is also difference, especially border district, and it is inconvenient, limitation to only rely on lithostratic unit's contrast, often With other relevant issues when causing to wear.By extinct plants and animal Strata Comparison, Ordovician in Ordos basin is tentatively achieved with the world The docking of the Ordovician system years division scheme of the newest announcement of the stratum committee, for example：3 fossil zones and international bio fossil zone phase Corresponding (graptolite C.bicornis and N.gracilis, conodont P.serra), predominantly Sang Bijie (S2 and S1) and reaches auspicious Weir Rank (D3), 2 fossil zones corresponding with North America mid-continental fossil zone (conodont P.undatus and B.confluens), predominantly Kate's rank (Ka1 and Ka2), 3 fossil zones corresponding with North Atlantic Ocean fossil zone (conodont E.suesicus, L.variabilis and P.originalis), predominantly reach auspicious Weir rank (Da1 and Da2) and big level ground rank (Dp2).By above-mentioned Contrast can be seen that the stratum age of the basin Ordovician system nearly 60% and establish substantially, wherein unite in the Ordovician system including Basin In Western edge Snake Hill group, public crow element group, draw assorted secondary group, black Lalique group, the back of the body pot mountain group of Basin South Margin and Pingliang group, disappearance inside basin； Group and Table Mountain group, Basin South Margin and six sections internal of horse, five sections of horse and four sections of horse in the middle Ke Limo for include Basin In Western edge that unites； Lower system includes tri- road bank group of Basin In Western Yuan, Basin South Margin and three sections internal of horse, Ma Erduan, Ma Yiduan, Liang Jia mountain group and smelting In group.Wherein, each set stratum can correspond to fossil zone, and boundary line is substantially clear, and middle system Table Mountain group and four pars infrasegmentalis of horse lack The Skeletal band that directly can be contrasted, lower bound not can determine that error is less than 1 fossil zone.Lower system is each to cover Strata Comparison error most Greatly, typically larger than 1 fossil zone, is thought with South China plate comparative study according to peace too ancient term for country school (1990), conodont At least corresponding Fl2 lower bound of A.leptosomatus, S.eburnus and L.dissectus, but specifically unknown, other underlying stratas Fail to match with international standard fossil band, therefore concrete corresponding relation wouldn't be fixed.From the point of view of extinct plants and animal contrast, can set up Stratigraphic Division And Correlation in zones of different or even global range with determine year, it is adaptable to complex geologic conditions, geophysical information are deficient Weary and research degree lower ground area, therefore, extinct plants and animal Strata Comparison is basis, for primarily determining that big set stratum age provides weight Will foundation.
2) event strata module.The auspicious Weir end of term and Sang Bi phase is being reached, is being developed extensive colcanism and reaches more than 10 times, its In, maximum-norm occurs reaching the auspicious Weir end of term, and deposited the volcanic tuff of about 50cm, the set stratum in Basin In Western edge and Widely distributed in the residual stratum of Nan Yuan, composition is mainly tephre 80%, Lu Yuan quartz 10%, miscellaneous base 10%.The set coagulates Why limestone can be not only widely distributed in Ordos Basin as regional correlation reference lamina, in global range at that time Other plates also extensive development, such as Gang Wana continent (Gondwana), Lao Lun continent (Laurentia), Baltic Sea plate (Baltica), South China plate (South China) and North China Plate (North China) etc. all have a large amount of reports.These fire It is that the tectono-paleogeographic environment for recovering the period provides reference that grieshoch is coagulated on mountain.The auspicious Weir end of term is reached, Pangea starts to disintegrate, Each macroplate is separated in succession, Ordos Basin be located at North China Plate edge, affected by periphery colcanism, deposited a set of relatively Thick volcanic tuff.To black Lalique early stage, colcanism frequency peaks, and basin peripheral faults is from basin outer rim to basin Ground internal activity aggravation, thus deposited the filmated volcanic tuff of many sets.It can be said that this set has global landmarks feature Volcanic tuff, is effectively to delimit geologic age there is provided accurate time ruler, especially for field section stratum Identification and division, significant.
3) isotope chemistry stratum module, in research area, the drift of isotopic compositions negative sense has two kinds of origin causes of formation：One be In closing, confined environments, the limestone for being formed and dolomite have relatively low δ13C value, because biogenic CO2Gas is not fugitive Send out, but evaporation meeting will be substantial amounts of16O is pulled away, and makes18O is relative to be enriched with.This information for research depositional environment, especially SEDIMENTARY FACIES ANALYSIS and the Stratigraphic Division And Correlation for being the absence of fossil is obviously particularly useful；Two be in the case of normal marine deposit,18O And δ13C value is all mutually overlapped compared with fresh water, when appearance in carbonate formation18O and δ13When C value value negative sense drifts about, then mostly air is light Ooze under water and ortho-carbonate displacement is caused.Wherein, in one section/Liang Jia of horse mountain group, three sections of two sections/horse of horse, five sections/Ke Limo of horse At group and the assorted secondary group of boundary line of black Lalique group/drawing, all there is the isotope that shallow water exposes and metrical water impact is caused and bear To drift.Contrasted by carbon isotope, in smelting, group is respectively positioned on special packway rank with Liang Jia mountain group, and Liang Jia Shan Zudi circle is located at Tr2 Middle part, corresponding with global sea rising.One section of horse, two sections of horse and three sections of horse are respectively positioned on not Lip river rank, and concrete interface corresponds to closes System is as shown in the figure.Four sections of horse is located at big level ground rank, and five sections of horse crosses over two ranks, and top extends to and reaches auspicious Weir rank bottom.Other groups, Section is basically identical with extinct plants and animal stratum, event strata comparing result with the corresponding relation of international standard section.By marking with international Quasi- section carbon isotope curve is compared with global sea change curve, more can accurately demarcate the time of each group, section Boundary line, when elementary error is less than 1, effectively compensate for the impact caused by above-mentioned two module data disappearance.Stable isotope Although Stratigraphic Division And Correlation method effectively, there is also defect.Must possess canonical profile first to be contrasted, secondly on a large scale Application, costly, the cycle is long.
4) SEQUENCE STRATIGRAPHIC module, by the detailed sight to Ordovician in Ordos basin field parent sequence section and auxiliary section Survey and understand, the form of expression of sequence interface mainly has 6 kinds, and respectively (veneer of crust rock is through long-term weathering effect for the paleocrust of weathering The saprolite for being distributed in veneer of crust for being formed), (development of earth history period is simultaneously covered fossil karst by deposit later Ancient karst acting surface), slope gravity stream washes away erosion surface (platform margin collapses or slope wash acts on the irregular boundary to be formed Face), in basin turbidity current erosion surface (turbidity current that develops in basin during RELATIVE SEA LEVEL rapid decrease washes away erosion institute to early stage deposition The irregular interface of formation) and lithology, petrofacies conversion surface.Paleocrust of weathering major developmental organizes boundary and bright first in Cambrian system/smelting The boundary of mountain group/one section of horse, in five sections/horse of horse, six sections of boundary, this 3 large interface is in the wild and seismic profile for Gu Kashite major developmental On be all easier to identification, be that full Sequence Stratigraphic Division And Correlation is laid a good foundation.Slope gravity stream is washed away erosion surface and is mainly divided Cloth is in six sections of horse (group in Ke Limo)/crow Lalique group (Pingliang group) boundary and Pingliang group/back of the body pot mountain group boundary, wherein, Wu La Make every effort to overcome group (Pingliang group) bottom and develop the slope of 2～3m first and collapse grey conglomerate gravity stream, sport mud stone and crystallite ash afterwards Rock alternating layers.To the back of the body pot mountain phase, basin periphery plate accelerates to converge collision lifting, causes basin periphery development slope gravity of many phases Stream, particularly Basin South Margin is intact, and gravel is suspended in mud stone matrix, 5～50cm of diameter, and the nearly source of category gravity stream sinks Product.Deep water turbidity current erosion surface major developmental draws assorted secondary phase Basin In Western edge ancient by Ih Ju League in the assorted secondary group of boundary of black Lalique group/drawing Land, Alxa ancient land, the motion of West China ancient land and the multiple impact of paleo-climate change, generally develop deep water turbidity current deposit, therefore turbid Stream erosion surface is the strong evidence of the two stratigraphic boundary.Lithology, petrofacies conversion surface major developmental the boundary of two sections of one section/horse of horse, Group boundary in two sections/horse of horse, three sections of boundary, three sections/horse of horse, four sections of boundary, four sections/horse of horse, five sections of boundary and Liang Jia mountain group/smelting. Used as a kind of interface form the most universal is applied in Strata Comparison, which receives local deposits ambient influnence larger, while have again Multi-solution, therefore needs with reference to other types of sequence interface comprehensive analysis, during in order to avoid occurring wearing.
5) well logging-earthquake joint interpretation module, in Ordos Basin, due to Ordovician system 2-d seismic data inferior quality It is difficult to, with adjacent survey line, the reason that closes, sets up basin chronostratigraphic architecture net and rely primarily on log.By above-mentioned flow process Substantially establish basin classification and correlation screen work net, but still do not reach requirement on industrial application, therefore, it is necessary to apply well- The integrated interpretation model of shake, specifies the spatial correspondence between log, seismic data cube and sequence interface and lithosomic body, and High accuracy basin three-dimensional geological model is finally set up, so as to really understand the deposition distribution situation inside basin.For many years, carbonic acid In rock salt Strata Comparison, the selection of log is always difficult point, can follow without law, need to be according to DIFFERENT DEPOSITIONAL ENVIRONMENTS and deposition The change of species type and change.Particularly set limestone or dolomite stratum greatly, traditional Pe and GR/SP curve just seem power not from The heart, therefore will use for reference sensitivity response of other logs to area's geological environment, such as AC, RLLd and RLLs and U-TH-K Combination etc..In research area, the geological response feature of Pe with GR/SP curve is similar with other basins, is not repeated, and this module is main Introduce some in classification and correlation potential characteristics of AC, RLLd and RLLs curve.
First, lithology, petrofacies conversion surface are effectively distinguished.AC and RLLd and RLLs curve are dividing four sections of horse and five sections of ground of horse There is during stratum boundary line preferable effect.Surely visit four sections of 1 well horse to transform through metharmosis for five sections with horse, show as big set white Yun Yan, Pe and GR/SP curve, is caused so the set stratum had also once once been divided into four sections of horse at the two interface nothing significant reaction The sedimentation that 1 wellblock occurs in that huge thickness near palaeohigh is visited surely, and this is runed counter to System Domain at that time.But according to Gu Geographical environment recovers to understand that being visited near 1 wellblock surely and being mainly restricted sea deposition, four sections of lithology of horse are mainly restricted sea biologic grain Beach phase dolomite and cloud limestone, five sections of horse predominantly restricted sea lamina containing cream Yun Yan and Hui Yunyan, the two interface is lithology, petrofacies Conversion surface.It sometimes appear that in the case of following：That is, in the case that other curves are nothing significant reaction, AC and RLLd and RLLs is bent Line but occurs in that interface abruptness, has efficiently identified the boundary line of the two.The appearance of above-mentioned situation, may be relevant with two kinds of factors： One is that layer variation of lithological is more sensitive over the ground for above-mentioned three kinds of curves, the presence of particularly a small amount of gypsum mineral；Two is five bottom of horse Boundary there may be cream nib.But if being the latter, usual RLLd and RLLs curve occurs positive separation, and vertical depth is relatively Greatly.
Secondly, the paleocrust of weathering or fossil karst can effectively be divided, RLLd and RLLs curve is in terms of the identification paleocrust of weathering Show unprecedented potential quality.There is sedimentary break between group in three rockery group of Cambrian system top and smelting, and big in basin In the range of develop the paleocrust of weathering and fossil karst, but this interface more difficult identification in Pe the and GR/SP curve of part well section, become Change amplitude is weak and feature is not obvious, but RLLd and RLLs profile amplitude difference occur in other well Stratigraphic Division And Correlations in basin Middle positive effect is played.
It is a kind of requisite technological means that Marine Basin well-shake is combined, especially at the exploration initial stage, between understanding well Formation variation trend and recovery ancient geoaraply border have good effect.Explanation is combined with integration by well-shake, basic foundation The chronostratigraphic architecture net in basin and periphery, has determined the STRATIGRAPHIC DIVISION of each subregion and corresponding relation in basin comprehensively.Example Such as：The Ordovician system mainly includes 2 second-order sequences and 8 third-band sequence, is finally achieved by full geodynamic evolution and international standard The integrating with of STRATIGRAPHIC DIVISION scheme, organizes special packway rank corresponding with Liang Jia mountain group wherein in smelting, one section～horse of horse, three sections of correspondences not Lip river rank, Four sections of horse big level ground rank corresponding with five pars infrasegmentalis of horse, six sections of five sections of tops of horse and horse is corresponding to reach auspicious Weir rank, and Pingliang group corresponds to mulberry ratio Rank, back of the body pot mountain group correspond to Kate's rank.System top on the general absence of basin.With early stage Stratigraphic Division And Correlation side by compared with, with relatively Different.
Said method can be used for the division on cratonic margin complicated geological environment mixed phase stratum and contrast, but be worth note Meaning, the method can be not only used for the division on cratonic margin complicated geological environment mixed phase stratum and contrast, can also use In division and the contrast on other complicated geological environment stratum, the application is not construed as limiting to this.
By the way.The accuracy of classification and correlation is stepped up, has been that geological prospecting previous work is laid Good basis, modules are incremental, it is adaptable to the division on cratonic margin complicated geological environment mixed phase stratum with right Than, it is to avoid the defect of single Stratigraphic Division And Correlation method and deficiency, the precision of classification and correlation is improve, while also assigning The geological meaning for having given Logging Curves new in gypsum and salt rock formation and weathering crust stratum, and establish new well log interpretation mould Type and improvement factor, improve the precision of well log interpretation.
Based on same inventive concept, a kind of mixed phase stratigraphic analysis device in the embodiment of the present invention, is additionally provided, as following Described in embodiment.As the principle of mixed phase stratigraphic analysis device solve problem is similar to mixed phase stratigraphic analysis method, therefore, device Enforcement may refer to the enforcement of mixed phase stratigraphic analysis method, repeat part and repeat no more.Used below, term " unit " Or " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples is relatively Realized with software goodly, but hardware, or the realization of the combination of software and hardware is also may and to be contemplated.Fig. 2 is A kind of structured flowchart of the mixed phase stratigraphic analysis device of the embodiment of the present invention, as shown in Fig. 2 including：Set up module 201, adjustment Module 202, correction module 203, two dimensional model set up module 204, three-dimension modeling module 205 and analysis module 206, below The structure is illustrated.
Set up module 201, for set up by extinct plants and animal stratigraphic analysis method mixed phase stratigraphy study area longitudinal stratum when Between sequence；
Adjusting module 202, for carrying out longitudinal contrast according to Geologic Time and geologic record to the stratum in the research area, Longitudinal stratum time series is adjusted according to longitudinal comparing result；
Correction module 203, for by isotopic distribution in research area stratum, during to longitudinal stratum after adjustment Between sequence be corrected；
Two dimensional model sets up module 204, for after being corrected to longitudinal stratum time series, further according to the research The sequence on area stratum carries out across comparison to stratum, chronological change framework net when setting up the two dimension in the research area etc.；
Three-dimension modeling module 205, for according to chronological change framework net during described two dimension etc. and well logging-earthquake one Change interpretation model, set up the three-dimensional geological model in research area；
Analysis module 206, for carrying out mixed phase stratigraphic analysis according to the three-dimensional geological model to the research area.
In one embodiment, setting up module 201 includes：Biological species acquiring unit, for obtaining research area ground The extinct plants and animal species of layer；Determining unit, for by the extinct plants and animal species of acquisition and pre-build Skeletal band standard or Skeletal band data bank is contrasted, and determines the geological epoch in the research area.
In one embodiment, determining unit is during the geological epoch in the research area is determined, if lack with Quasi-fossil, then determine geological epoch by the way of transboundary contrasting, or, geological epoch is determined by the way of neighbour's contrast.
In one embodiment, the log parameter in the well logging-earthquake integration interpretation model include following at least it One：Photoelectric absorption cross-section index, natural gamma, natural potential, interval transit time, density log, depth are lateral and shallow lateral.
In one embodiment, three-dimension modeling module 205 can include：Rock composition percentage determining unit, uses In equation being explained according to the rock forming mineral content quantitative in the well logging-earthquake integration interpretation model, determine the research area Rock mineral composition percent by volume；Adjustment unit, described in comparing according to the rock mineral composition volume basis for determining Three-dimensional geological model is adjusted, to improve the precision of the three-dimensional geological model.
In one embodiment, the rock forming mineral content quantitative in above-mentioned well logging seismic interpretation model explains that equation is：
Wherein, Δ t represents acoustic travel time logging, ρbRepresent density log, ΦNRepresent neutron well logging, Φ represents blowhole Degree, V1、V2、V3Represent rock mineral composition percentage by volume, Δ tf、ρf、ΦNfRepresent pore-fluid parameter, Δ tma、ρma、ΦNma Represent rock skeleton parameter, a, b, c, d represent improvement factor.
In another embodiment, a kind of software is additionally provided, and the software is used for executing above-described embodiment and preferred reality Apply the technical scheme described in mode.
In another embodiment, a kind of storage medium is additionally provided, and be stored with the storage medium above-mentioned software, should Storage medium is included but is not limited to：CD, floppy disk, hard disk, scratch pad memory etc..
As can be seen from the above description, the embodiment of the present invention achieves following technique effect：Provide a kind of research The geologic prospecting method in area, first passes through longitudinal stratum time series that extinct plants and animal stratigraphic analysis method sets up research area, Ran Houzai Pass sequentially through event strata and isotope chemistry stratum longitudinal stratum time series is adjusted, and two dimension is determined by SEQUENCE STRATIGRAPHIC Stratigraphic framework net, finally sets up out the three-dimensional geological model in research area again by earthquake joint interpretation method of logging well, such that it is able to The deposition distribution situation inside basin is effectively determined, is solved using several stratigraphic partition and correlation methods in prior art The low problem of the simple accuracy for combining divide stratum and to be contrasted and cause, has reached mixed phase stratigraphic partition and correlation The purpose of accuracy as a result.
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention or each step permissible Realized with general computing device, they can be concentrated on single computing device, or be distributed in multiple computing devices On the network for being constituted, alternatively, they can be realized with the executable program code of computing device, it is thus possible to by it Store and executed by computing device in the storage device, and in some cases, can be held with the order being different from herein Shown in row or the step of description, or they are fabricated to each integrated circuit modules respectively, or by the multiple moulds in them Block or step are fabricated to single integrated circuit module to realize.So, the embodiment of the present invention is not restricted to any specific hardware Combine with software.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.

Claims (8)

1. a kind of mixed phase stratigraphic analysis method, it is characterised in that include：
Longitudinal stratum time series in mixed phase stratigraphy study area is set up by extinct plants and animal stratigraphic analysis method；
Longitudinal contrast is carried out to the stratum in the research area according to Geologic Time and geologic record, is adjusted according to longitudinal comparing result Longitudinal stratum time series；
By isotopic distribution in research area stratum, the longitudinal stratum time series after adjustment is corrected；
After being corrected to longitudinal stratum time series, further according to research area stratum sequence stratum is carried out laterally right Than chronological change framework net when setting up the two dimension in the research area etc.；
According to chronological change framework net during described two dimension etc. and well logging-earthquake integration interpretation model, the three-dimensional in research area is set up Geological model；
Mixed phase stratigraphic analysis is carried out to the research area according to the three-dimensional geological model；
Wherein, according to chronological change framework net during described two dimension etc. and well logging-earthquake integration interpretation model, research area is set up Three-dimensional geological model, including：
Equation is explained according to the rock forming mineral content quantitative in the well logging-earthquake integration interpretation model, determines the research The rock mineral composition percent by volume in area；
The three-dimensional geological model is compared according to the rock mineral composition volume basis for determining to be adjusted, to improve the three-dimensional The precision of geological model；
Wherein, the rock forming mineral content quantitative in the well logging-earthquake integration interpretation model explains that equation is：
Δ t ρ b Φ N 1 = a b c d Δt f Δt m a 1 Δt m a 2 Δt m a 3 ρ f ρ m a 1 ρ m a 2 ρ m a 3 Φ N f Φ N m a 1 Φ N m a 2 Φ N m a 3 1 1 1 1 Φ V 1 V 2 V 3
Wherein, Δ t represents acoustic travel time logging, ρbRepresent density log, ΦNRepresent neutron well logging, Φ represents rock porosity, V1、V2、V3Represent rock mineral composition percentage by volume, Δ tf、ρf、ΦNfRepresent pore-fluid parameter, Δ tma、ρma、ΦNmaTable Show rock skeleton parameter, a, b, c, d represent improvement factor.
2. the method for claim 1, it is characterised in that mixed phase stratigraphy study is set up by extinct plants and animal stratigraphic analysis method Longitudinal stratum time series in area, including：
Obtain the extinct plants and animal species on research area stratum；
The extinct plants and animal species of acquisition is contrasted with the Skeletal band standard for pre-building or Skeletal band data bank, Determine the geological epoch in the research area.
3. method as claimed in claim 2, it is characterised in that during the geological epoch in the research area is determined, such as Fruit lack same quasi-fossil, then determine geological epoch by the way of transboundary contrasting, or, using neighbour contrast by the way of definitely The matter age.
4. the method for claim 1, it is characterised in that the well logging ginseng in the well logging-earthquake integration interpretation model Number includes at least one of：Photoelectric absorption cross-section index, natural gamma, natural potential, interval transit time, density log, deep side To lateral with shallow.
5. a kind of mixed phase stratigraphic analysis device, it is characterised in that include：
Module is set up, for longitudinal stratum time series in mixed phase stratigraphy study area is set up by extinct plants and animal stratigraphic analysis method；
Adjusting module, for carrying out longitudinal contrast according to Geologic Time and geologic record to the stratum in the research area, according to vertical Longitudinal stratum time series is adjusted to comparing result；
Correction module, for by isotopic distribution in research area stratum, to the longitudinal stratum time series after adjustment It is corrected；
Two dimensional model sets up module, for after being corrected to longitudinal stratum time series, further according to research area stratum Sequence across comparison is carried out to stratum, chronological change framework net when setting up the two dimension in the research area etc.；
Three-dimension modeling module, for explaining according to chronological change framework net during described two dimension etc. and well logging-earthquake integration Model, sets up the three-dimensional geological model in research area；
Analysis module, for carrying out mixed phase stratigraphic analysis according to the three-dimensional geological model to the research area；
Wherein, the three-dimension modeling module includes：
Rock composition percentage determining unit, for containing according to the rock forming mineral in the well logging-earthquake integration interpretation model Amount quantitative interpretation equation, determines the rock mineral composition percent by volume in the research area；
Adjustment unit, is adjusted for comparing the three-dimensional geological model according to the rock mineral composition volume basis for determining, To improve the precision of the three-dimensional geological model；
Wherein, the rock forming mineral content quantitative in the well logging-earthquake integration interpretation model explains that equation is：
Δ t ρ b Φ N 1 = a b c d Δt f Δt m a 1 Δt m a 2 Δt m a 3 ρ f ρ m a 1 ρ m a 2 ρ m a 3 Φ N f Φ N m a 1 Φ N m a 2 Φ N m a 3 1 1 1 1 Φ V 1 V 2 V 3
Wherein, Δ t represents acoustic travel time logging, ρbRepresent density log, ΦNRepresent neutron well logging, Φ represents rock porosity, V1、V2、V3Represent rock mineral composition percentage by volume, Δ tf、ρf、ΦNfRepresent pore-fluid parameter, Δ tma、ρma、ΦNmaTable Show rock skeleton parameter, a, b, c, d represent improvement factor.
6. device as claimed in claim 5, it is characterised in that the module of setting up includes：
Biological species acquiring unit, for obtaining the extinct plants and animal species on research area stratum；
Determining unit, for providing the extinct plants and animal species of acquisition and the Skeletal for pre-building band standard or Skeletal band Material storehouse is contrasted, and determines the geological epoch in the research area.
7. device as claimed in claim 6, it is characterised in that the determining unit is determining the geological epoch in the research area During, if lacking same quasi-fossil, geological epoch is determined by the way of transboundary contrasting, or, contrasted using neighbour Mode determine geological epoch.
8. device as claimed in claim 5, it is characterised in that the well logging ginseng in the well logging-earthquake integration interpretation model Number includes at least one of：Photoelectric absorption cross-section index, natural gamma, natural potential, interval transit time, density log, deep side To lateral with shallow.
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