CN106772675A - Method based on fault rupture structure evaluation tomography keying property - Google Patents
Method based on fault rupture structure evaluation tomography keying property Download PDFInfo
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Abstract
The present invention relates to a kind of method based on fault rupture structure evaluation tomography keying property, comprise the following steps：The fault structure feature of the various types of tomography in hard objectives region；The permeability at different fault structure positions is obtained according to the fault structure feature；Using the keying probability of the computing permeability corresponding site of the fault structure different parts, then using the keying probability for opening and closing probability calculation correspondence interval tomography of the corresponding site, then the keying for opening and closing the tomography of target area described in probability assessment for passing through different interval tomographies.According to the method based on fault rupture structure evaluation tomography keying property that the present invention is provided, it is considered to various geologic(al) factors, the precise requirements of fault sealing property quantitative assessment are disclosure satisfy that, petroleum resources geological prospecting and development evaluation field can be widely used in.
Description
Technical field
Method the present invention relates to be based on fault rupture structure evaluation tomography keying property.
Background technology
The evolutionary process of tomography is divided into active stage and resting stage, and active stage is typically all of short duration, and tomography is predominantly static
Phase.Fault development phase or active stage are opening, can be as the passage of oil-gas migration.Fault sealing property and start-stop performance are commented
Valency determines that tomography is opened and closed or closed to oil gas mainly for the tomography in resting stage.Fault closeness evaluation after
Two stages of qualitative and quantitative, the main formation mechenism by analyzing fault sealing after the 1950's, it is proposed that sand mud pair
Connect, mudstone creep, DIAGENETIC CHARACTERISTICS etc. can produce sealing condition, use the closing of " closing " and " not closing " qualitative description tomography
Ability；The proposition and application of tomography keying property method for quantitatively evaluating start from the end of the eighties in last century, and quantifying for application is available at present
Index mainly includes CSP, SSF, SGR, Allen diagram method, disconnected storage difference of displacement pressure, section direct stress, fault sealing coefficient, company
Logical probabilistic method etc..
Tomography keying ability is affected by various factors, including fault properties, turn-off, lithology combination and its docking are closed
The same natural disposition of system, buried depth, inclination angle, mudstone creep, metharmosis size, fault zone interior structure difference, and tomography and
Activity etc..Single closure and keying merit rating method, it is difficult to accurate evaluation, causes the limitation of evaluation result sometimes
Property and uncertainty.All these factors are again very difficult for consideration, because some factors are to be difficult to be obtained in oil-gas exploration, exploitation
Arrive, especially early stage in oil-gas exploration.Current closure and keying Comprehensive Evaluation On Ability method mainly includes non-linear reflecting
Analytic approach, Logic-information method, Multistage fuzzy comprehensive technology etc. are penetrated, these methods are, using mathematical statistics knowledge, will to close
Property and open and close factors influencing on ability press weight size, set up the comprehensive Mathematical Method of function model.
Although achieving many impressive progresses on fault sealing Journal of Sex Research both at home and abroad, still without a kind of very ripe suitable
With the evaluation method under various geological conditions.
The content of the invention
It is an object of the present invention to propose a kind of method based on fault rupture structure evaluation tomography keying property.
A kind of method based on fault rupture structure evaluation tomography keying property of the invention, comprises the following steps：
S101：The fault structure feature of the various types of tomography in hard objectives region；S102：Obtain different disconnected according to the fault structure feature
The permeability at Rotating fields position；S103：Keying using the computing permeability corresponding site of the fault structure different parts is general
Rate, it is then using the keying probability for opening and closing probability calculation correspondence interval tomography of the corresponding site then disconnected by different intervals
The keying for opening and closing the tomography of target area described in probability assessment of layer.
According to the present invention provide based on fault rupture structure evaluation tomography open and close property method, it is considered to various geology because
Element, disclosure satisfy that the precise requirements of fault sealing property quantitative assessment, can be widely used in petroleum resources geological prospecting and exploitation
Evaluation field.
In addition, according to the above-mentioned method based on fault rupture structure evaluation tomography keying property of the present invention, can also have
Following additional technical characteristic：
Further, the step S101 includes following sub-step：S1011：By sectional analysis method to seismic region
Tomography be analyzed, to obtain fault style, divide tomography rank, distinguish fault properties, then differentiate different stage tomography
Correlation；S1012：Using basin region block diagram, geologic map and drilling well block diagram determine different layers position lithology and its
The fragility and plasticity of lithology；S1013：Using field section research different layers position, the architectural feature of the tomography of different lithology, it is determined that
Catalase situation, fracture development density and scope, mudstone creep, fault gouge development and chemical bond situation；S1014：Root
Determine to bore the well for meeting tomography according to seismic data, fault structure is then determined according to well-log information；S1015：According to fault properties,
Disconnect the fault structure feature for determining various types of tomography of lithology, developing stratum and Fault depth.
Further, in the sub-step S1014, when fault structure is determined according to well-log information, first by well
Shake calibration technique determines the depth segment of mature fault, then determines fault structure by sensitivity curve of logging well.
Further, the well-log information in the sub-step S1014 includes Electrical imaging data harmony imaging data.
Further, the step S102 includes following sub-step：S1021：Outer section out of office is bored sample, and to not
Same fault properties, disconnection lithology and mature fault layer position are analyzed；S1022：In crushed zone and/or the difference of induced fractures band
Position of fault carries out close sampling, and the protolith of the nearer identical lithology of the selected distance tomography is sampled, wherein, sampling rule
Lattice meet porosity and permeability test request；S1023：The porosity of the acquired complete rock sample of measurement, permeability and close
Angle value, and set up porosity-permeability, porosity-density relationship；S1024：Different tomography knots are set up using core test result
Correlation of the structure with permeability and depth and permeability with lithology.
Further, after the sub-step S1022, also including following sub-step：Incomplete rock sample to obtaining enters
Analyzed under row mirror and by itself and the sample contrast of test physical property, with Estimation of porosity and permeability.
Further, the step S103 includes following sub-step：S1031：Analysis tomography related reservoir, chooses the oil
Breakpoint at the top and bottom of Tibetan, and combine the permeability of disk slit band, the permeability of crushed zone and lower wall in step S102 determinations
The permeability of slit band；S1032：Count permeability, the permeability of the crushed zone and the lower wall of the upper disk slit band
The permeability of slit band and the correlation of the oil-gas reservoir, are then set up and are counted with fault structure band permeability based on display feature
The model of probability, and fit correlation opens and closes probabilistic type, then by the conspicuousness of look-up table inspection statistics；S1033：Using reality
Data fitting formula P=100-eAlgK+B, to obtain the value of undetermined coefficient A and B, in formula, to open and close probability, K is permeability, K to P
Unit be 10-3μm2；S1034：Based on oil gas preferentially by the principle of hypertonic flow rate medium, the fault structure is chosen respectively
The maximum seepage flow rate of correspondence fault structure band under different depth, and the tomography keying probability of different depth section is asked for respectively, then
The product for opening and closing probability by the tomography of all different depths section obtains the overall of the fault structure and opens and closes probability；S1035：According to
There is tomography and/or the determination of bigger keying probability in the target area in the keying determine the probability target area of different tomographies
The position with bigger keying probability of a certain tomography.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Fig. 1 is the flow chart of the method based on fault rupture structure evaluation tomography keying property of the invention；
Fig. 2 is the vertical keying probability statistics figure of tomography；
Fig. 3 is that tomography opens and closes probability assessment model.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of Description of Drawings is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Embodiment 1
As shown in figure 1, embodiment 1 provides a kind of method based on fault rupture structure evaluation tomography keying property, specifically
Comprise the following steps:
S101：The fault structure feature of the various types of tomography in hard objectives region.
S102：The permeability at different fault structure positions is obtained according to the fault structure feature.
S103：Using the keying probability of the computing permeability corresponding site of the fault structure different parts, then utilize
The keying probability for opening and closing probability calculation correspondence interval tomography of the corresponding site, then by the keying probability of different interval tomographies
Evaluate the keying of the tomography of the target area.
The method based on fault rupture structure evaluation tomography keying property that embodiment 1 is provided, it is considered to various geologic(al) factors, energy
Enough meet the precise requirements of fault sealing property quantitative assessment, petroleum resources geological prospecting and development evaluation neck can be widely used in
Domain.
Embodiment 2
Embodiment 2 provides a kind of method based on fault rupture structure evaluation tomography keying property, specifically includes following step
Suddenly:
S101：The fault structure feature of the various types of tomography in hard objectives region, specifically includes following sub-step：
S1011：The tomography of seismic region is analyzed by sectional analysis method, to obtain fault style, divide disconnected
Level is other, distinguish fault properties, then differentiates the correlation of different stage tomography.
S1012：The lithology and its lithology of different layers position are determined using basin region block diagram, geologic map and drilling well block diagram
Fragility and plasticity.
S1013：Using field section research different layers position, the architectural feature of the tomography of different lithology, catalase is determined
Situation, fracture development density and scope, mudstone creep, fault gouge development and chemical bond situation.
S1014：Determine to bore the well for meeting tomography according to seismic data, fault structure is then determined according to well-log information.
S1015：Various types of tomography is determined according to fault properties, disconnection lithology, developing stratum and Fault depth
Fault structure feature.
S102：The permeability at different fault structure positions is obtained according to the fault structure feature, following son is specifically included
Step：
S1021：Outer section out of office is bored sample, and different fault properties, disconnection lithology and mature fault layer position are entered
Row analysis；
S1022：Close sampling is carried out in the different position of fault of crushed zone and/or induced fractures band, and selected distance should
The protolith of the nearer identical lithology of tomography is sampled, wherein, sampling specification meets porosity and permeability test request；
S1023：Porosity, permeability and the density value of acquired complete rock sample are measured, and sets up porosity-infiltration
Rate, porosity-density relationship；
S1024：Different fault structures are set up with permeability and depth and permeability and lithology using core test result
Correlation.
S103：Using the keying probability of the computing permeability corresponding site of the fault structure different parts, then utilize
The keying probability for opening and closing probability calculation correspondence interval tomography of the corresponding site, then by the keying probability of different interval tomographies
The keying of the tomography of the target area is evaluated, following sub-step is specifically included：
S1031：Analysis tomography related reservoir, chooses the breakpoint at the top and bottom of the oil reservoir, and it is true to combine step S102
Surely disk slit band (a is gone up1) permeability, crushed zone (b1) permeability and lower wall slit band (c1) permeability；
S1032：Count permeability, the permeability of the crushed zone and the lower wall slit band of the upper disk slit band
Permeability and the correlation of the oil-gas reservoir, then set up based on display feature and mould of the fault structure with permeability statistical probability
Type (see Fig. 2), and fit correlation opens and closes probabilistic type, then by the conspicuousness of look-up table inspection statistics；
S1033：Using real data fitting formula P=100-eAlgK+B, to obtain the value of undetermined coefficient A and B, in formula, P
To open and close probability, K is permeability, and the unit of K is 10-3μm2；
S1034：Based on oil gas preferentially by the principle of hypertonic flow rate medium, the fault structure different depth is chosen respectively
The maximum seepage flow rate of lower correspondence fault structure band, and the tomography keying probability of different depth section is asked for respectively, then by all
The product of the tomography keying probability of different depth section obtains the overall of the fault structure and opens and closes probability, sees Fig. 3, and formula is as follows：
K1=Max(a1, b1, c1)
K2=Max(a2, b2, c2)
K3=Max(a3, b3, c3)
P=P1×P2×…Pi(i=1,2,3 ...)
S1035：There is bigger keying in the keying determine the probability target area of different tomographies according in the target area
The tomography of probability and/or the position with bigger keying probability of a certain tomography of determination.
The method based on fault rupture structure evaluation tomography keying property that embodiment 2 is provided, it is considered to various geologic(al) factors, energy
Enough meet the precise requirements of fault sealing property quantitative assessment, petroleum resources geological prospecting and development evaluation neck can be widely used in
Domain.
Embodiment 3
Embodiment 3 is based on Gaer basin some areas fault rupture structure evaluation tomography keying property, and step is equal with embodiment 2
Identical, embodiment 3 show that the identical lithology permeability in Junggar Basin some areas has power related to depth in step S1024
Property, i.e.,：
K=A*HB
In formula：K-permeability, unit is 10-3μm2；H-depth, unit is m；A, B-undetermined coefficient, using testing number
Obtained according to fitting.
The method provided using the present embodiment carries out system evaluation to the screw oil expeller fracture of Zhunger Basin western part, and overall evaluation result is obtained
Go out, identical scale-level tomography, architectural feature is more consistent, dredge that probability is larger, craven fault probability is small；Same tomography, upper disk splits
Seamed belt keying property is more than lower wall slit band, and lower wall slit band is more than crushed zone, i.e. keying property has good positive correlation with permeability
Property, permeability dredges more greatly that probability is higher, has good uniformity with the fault structure that drilling and coring delivery shows, illustrates this implementation
The method that example is provided has certain accuracy.
Embodiment 4
Embodiment 4 provides a kind of based on Chepaizi area, Junggar basin Carboniferous System volcanic rock fault structure evaluation in detail
The method of its keying property, embodiment 4 is differed only in embodiment 3, in the sub-step S1014, is provided according to well logging
When material determines fault structure, the depth segment that calibration technique determines mature fault is shaken by well first, it is then sensitive bent by logging well
Line determines fault structure.Remaining step all same.Sub- Carboniferous volcanic rock is arranged using embodiment 4 to Junggar Basin car to break
Rotating fields are identified, and distinguishing indexes are shown in Table 1.
The Chepaizi area, Junggar basin Carboniferous System volcanic rock fault structure distinguishing indexes of table 1
F：Fault structure index parameters (dimensionless), are logged well bent by interval transit time, density, depth (shallow) resistivity, hole diameter etc.
Line changing value, normalization is multiplied by after weight coefficient is added and is obtained.
Can be drawn by table 1, embodiment 4 arranges Junggar Basin car Carboniferous volcanic rock fault structure identification
Result has good uniformity with the fault structure that drilling and coring delivery shows, illustrates that the method disclosure satisfy that fault sealing property is quantified
The precise requirements of evaluation.
Embodiment 5
Embodiment 5 provides a kind of method that its keying property is evaluated based on Hinterland of The Junggar Basin fault structure in detail, real
Differing only in for example 5 and embodiment 3 is applied, the well-log information in the sub-step S1014 includes Electrical imaging data and acoustic imaging
Data, is combined with finer identification fault structure using imaging data colour code and crack identification achievement with Conventional Logs.
Remaining step all same.
The Zhunger Basin belly tomography evaluation result that embodiment 5 draws shows that its Electrical imaging, acoustic imaging confirm upper disk slit band
Obvious fracture development, evaluates display and dredges that probability is larger to reach 73%, and lower wall and crushed zone crack and permeability are smaller, dredge
Probability is only 27%.The finishing drilling of Dong 701 confirms, is especially predominantly located at and is broken upper disk, and lower wall is without any display.Embodiment 5 draws
Result and actual results of drilling have preferable uniformity, illustrate that the method for the offer of embodiment 5 disclosure satisfy that fault sealing property is fixed
Measure the precise requirements evaluated.
Embodiment 6
Embodiment 6 provides a kind of side that its keying property is evaluated based on Junggar backlands area fault structure in detail
Method, embodiment 6 is differed only in embodiment 3, after the sub-step S1022, also including following sub-step：To what is obtained
Incomplete rock sample analyzed and by itself and the sample contrast of test physical property under mirror, with Estimation of porosity and permeability.
Verify that it is 5% or so that this area's fault belt is dredged, and probability 85% is dredged much smaller than upper disk by surveying physical property
With lower wall 80%.This bores regional tomography scale with this greatly in fact, and crushed zone development is consistent, due to preferable plugging action, tomography
Lower wall oil/gas show is significantly better than hanging wall, and oil gas is mainly distributed in lower wall.Real result of boring has preferably kiss with evaluation conclusion
Conjunction property, illustrates that the method for the offer of embodiment 6 disclosure satisfy that the precise requirements of fault sealing property quantitative assessment.
To sum up, the method based on fault rupture structure evaluation tomography keying property for being provided according to the present invention, it is considered to variously
Quality factor, disclosure satisfy that the precise requirements of fault sealing property quantitative assessment, can be widely used in petroleum resources geological prospecting and
Development evaluation field.The method provided using the present invention is more to the sub- area of Junggar Basin car row, basin belly, quasi- north, quasi- south
Individual regional tomography keying property is evaluated, and evaluation result has good uniformity with real result of boring.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (7)
1. it is a kind of based on fault rupture structure evaluation tomography open and close property method, it is characterised in that comprise the following steps：
S101：The fault structure feature of the various types of tomography in hard objectives region；
S102：The permeability at different fault structure positions is obtained according to the fault structure feature；
S103：Using the keying probability of the computing permeability corresponding site of the fault structure different parts, then using described
The keying probability for opening and closing probability calculation correspondence interval tomography of corresponding site, then by the keying probability assessment of different interval tomographies
The keying of the tomography of the target area.
2. it is according to claim 1 based on fault rupture structure evaluation tomography open and close property method, it is characterised in that it is described
Step S101 includes following sub-step：
S1011：The tomography of seismic region is analyzed by sectional analysis method, to obtain fault style, divide tomography level
Not, fault properties are distinguished, the correlation of different stage tomography is then differentiated；
S1012：Using basin region block diagram, geologic map and drilling well block diagram determine different layers position lithology and its lithology it is crisp
Property and plasticity；
S1013：Using field section research different layers position, the tomography of different lithology architectural feature, determine catalase situation,
Fracture development density and scope, mudstone creep, fault gouge development and chemical bond situation；
S1014：Determine to bore the well for meeting tomography according to seismic data, fault structure is then determined according to well-log information；
S1015：The disconnected of various types of tomography is determined according to fault properties, disconnection lithology, developing stratum and Fault depth
Split architectural feature.
3. it is according to claim 2 based on fault rupture structure evaluation tomography open and close property method, it is characterised in that in institute
State in sub-step S1014, when fault structure is determined according to well-log information, calibration technique is shaken by well first and determines mature fault
Depth segment, fault structure is then determined by sensitivity curve of logging well.
4. according to Claims 2 or 3 based on fault rupture structure evaluation tomography open and close property method, it is characterised in that
Well-log information in the sub-step S1014 includes Electrical imaging data harmony imaging data.
5. it is according to claim 1 based on fault rupture structure evaluation tomography open and close property method, it is characterised in that it is described
Step S102 includes following sub-step：
S1021：Outer section out of office is bored sample, and different fault properties, disconnection lithology and mature fault layer position are divided
Analysis；
S1022：Close sampling is carried out in the different position of fault of crushed zone and/or induced fractures band, and the selected distance tomography
The protolith of nearer identical lithology is sampled, wherein, sampling specification meets porosity and permeability test request；
S1023：The porosity of the acquired complete rock sample of measurement, permeability and density value, and set up porosity-permeability,
Porosity-density relationship；
S1024：It is related with lithology to depth and permeability with permeability different fault structures to be set up using core test result
Property.
6. it is according to claim 5 based on fault rupture structure evaluation tomography open and close property method, it is characterised in that in institute
After stating sub-step S1022, also including following sub-step：Incomplete rock sample to obtaining carries out under mirror analysis and by itself and test
Physical property sample is contrasted, with Estimation of porosity and permeability.
7. it is according to claim 1 based on fault rupture structure evaluation tomography open and close property method, it is characterised in that it is described
Step S103 includes following sub-step：
S1031：Analysis tomography related reservoir, chooses the breakpoint at the top and bottom of the oil reservoir, and combine in step S102 determinations
The permeability of the permeability of disk slit band, the permeability of crushed zone and lower wall slit band；
S1032：Count the infiltration of the permeability, the permeability of the crushed zone and the lower wall slit band of the upper disk slit band
Rate and the correlation of the oil-gas reservoir, then set up based on display feature and model of the fault structure with permeability statistical probability,
And fit correlation opens and closes probabilistic type, then by the conspicuousness of look-up table inspection statistics；
S1033：Using real data fitting formula P=100-eAlgK+B, to obtain the value of undetermined coefficient A and B, in formula, P is to open
Probability is closed, K is permeability, and the unit of K is 10-3μm2；
S1034：Based on oil gas preferentially by the principle of hypertonic flow rate medium, choose right under the fault structure different depth respectively
The maximum seepage flow rate of fault structure band is answered, and asks for the tomography of different depth section respectively and open and close probability, then by all differences
The product of the tomography keying probability of depth segment obtains the overall of the fault structure and opens and closes probability；
S1035：There is bigger keying probability in the keying determine the probability target area of different tomographies according in the target area
Tomography and/or determine the position with bigger keying probability of a certain tomography.
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| CN112068200A (en) * | 2020-09-12 | 2020-12-11 | 东北石油大学 | Quantitative characterization and prediction method for internal structure of outcrop zone fracture zone |
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| CN113093306A (en) * | 2021-03-31 | 2021-07-09 | 中国科学院地质与地球物理研究所 | Method for determining fault activity during structural stability |
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