CN109917455B - Method and system for depicting formation trap - Google Patents
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Abstract
The invention provides a method and a system for depicting a stratigraphic trap, which comprise the following steps: acquiring a tuning point and a layer leveling target layer which can identify the inclined stratum and correspond to the inclined stratum; the tuning points include: identifying an amplitude maxima point or an amplitude minima point for a dipping formation; intersecting the extension of the identifiable inclined stratum with a layer leveling target layer to generate a stratum inclination angle and a sharp vanishing point; calculating and generating a stratum trapping boundary according to the stratum inclination angle and the obtained tuning thickness corresponding to the tuning point according to a trigonometric law; and (4) according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap. The method and the device have the advantages that the thickness, the dip angle and the pinch-out point are tuned to carry out quantitative calculation, the accurate depicting of the stratigraphic confinement boundary is realized, and the accuracy and the calculation efficiency of the depicting of the stratigraphic confinement boundary are improved.
Description
Technical Field
The invention relates to the technical field of seismic data interpretation, in particular to a method and a system for depicting a stratigraphic trap.
Background
Stratigraphic traps refer to traps formed by reservoirs due to interruptions in longitudinal depositional continuity, i.e., traps associated with unconformities. Formation traps are generally classified into three types: stratum unconformity shielding trap, stratum super-covering trap and biological reef trap. The stratum unconformity trap in the prior art is mainly related to a latent ablation bulge and a latent ablation structure, and the ablation bulge or the ablation structure is covered by a later-deposited impermeable stratum to form a stratum trap which is covered by an underburden reservoir. In the prior art, the stratum supertrap is influenced by the advance and retreat of sea (lake) water caused by the elevation of the crust. Stratum overburden means that when sea (lake) water gradually, the deposition range is expanded, and a new stratum covers an old stratum and expands towards the land direction and is in unconformity contact with the old stratum. A positive gyroid sequence with a thin top and a thick bottom is presented in the longitudinal direction. Overburden deposited impermeable mudstone over the sand layer forms a favorable layer to trap.
Due to the influence of seismic data resolution, in the prior art, a method for researching boundaries of unconformity shielding traps and stratigraphic supercoverage traps of stratums generally obtains a fitting relation between a stratum included angle and an extrapolation distance through numerical forward simulation so as to depict a range in which seismic data cannot be resolved clearly. However, the above-mentioned research methods have the following disadvantages:
1. the main frequencies of the seismic data are different, and the fitting relation is different;
2. the fitting relation is different due to different buried depths and different wave impedance differences of the research stratum.
Due to the two defects, each work area needs to repeat forward modeling experiments, so that the prior art scheme has complex operation process, low efficiency and large extrapolation result error of the work area.
In order to solve the technical problems in the prior art, how to accurately calculate the extrapolation result of the boundary of the unconformity occlusion trap and the formation supercovery trap is a technical problem to be solved urgently at present.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method and a system for depicting the stratigraphic trap, which are used for quantitatively calculating the tuning thickness, the stratigraphic dip angle and the pinch-out point, realizing accurate depicting of the stratigraphic trap boundary and having the beneficial effects of improving the depicting accuracy and the calculating efficiency of the stratigraphic trap boundary.
In order to achieve the above object, the present invention provides a method for describing a formation trap, the method comprising:
acquiring an identifiable inclined stratum, a tuning point corresponding to the identifiable inclined stratum and a layer leveling target layer; the tuning points include: a maximum point of amplitude for the identified dipping formation or a minimum point of amplitude for the identified dipping formation;
intersecting the identifiable dip stratigraphic extension with the layer leveling target layer to generate a stratigraphic dip angle and a sharp vanishing point;
calculating and generating a stratum trapping boundary according to the stratum inclination angle and the acquired tuning thickness corresponding to the tuning point and a trigonometric law;
and according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap.
The invention also provides a system for depicting the stratigraphic trap, which comprises:
the acquisition unit is used for acquiring an identifiable inclined stratum, a tuning point corresponding to the identifiable inclined stratum and a layer leveling target layer; the tuning points include: a maximum point of amplitude for the identified dipping formation or a minimum point of amplitude for the identified dipping formation;
the extension unit is used for extending the identifiable inclined stratum to intersect with the leveling target layer to generate a stratum inclination angle and a sharp vanishing point;
the calculation unit is used for calculating and generating a stratum trap boundary according to the stratum inclination angle and the acquired tuning thickness corresponding to the tuning point according to a trigonometric law;
and the drawing unit is used for drawing according to the stratigraphic trap boundary to generate the stratigraphic trap.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the method for depicting the stratigraphic trap when executing the program.
The invention provides a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for delineating a formation trap.
The invention provides a method and a system for depicting a stratigraphic trap, which comprise the following steps: acquiring an identifiable inclined stratum, a tuning point corresponding to the identifiable inclined stratum and a layer leveling target layer; the tuning points include: a maximum point of amplitude for the identified dipping formation or a minimum point of amplitude for the identified dipping formation; intersecting the identifiable dip stratigraphic extension with the layer leveling target layer to generate a stratigraphic dip angle and a sharp vanishing point; calculating and generating a stratum trapping boundary according to the stratum inclination angle and the acquired tuning thickness corresponding to the tuning point and a trigonometric law; and according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap. The method and the device have the advantages that the thickness, the dip angle and the pinch-out point are tuned to carry out quantitative calculation, the accurate depicting of the stratigraphic confinement boundary is realized, and the accuracy and the calculation efficiency of the depicting of the stratigraphic confinement boundary are improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method of depicting a formation trap according to the present application;
FIG. 2 is a flow chart of a method for delineating a formation trap in an embodiment of the present application;
FIG. 3 is an original seismic section in one embodiment of the present application;
FIG. 4 is an original seismic section in another embodiment of the present application;
FIG. 5 is an original seismic section view after the horizon has been flattened in an embodiment of the application;
FIG. 6 is a cross-sectional view of an original seismic section after layer flattening in another embodiment of the present application;
FIG. 7 is a schematic illustration of pinch-off points in an embodiment of the present application;
FIG. 8 is a flowchart of step S205 in an embodiment of the present application;
FIG. 9 is a flowchart of step S301 in an embodiment of the present application;
FIG. 10 is a schematic view of a stratigraphic trap boundary in an embodiment of the present application;
FIG. 11 is a schematic illustration of a depiction system of a formation trap according to the present application;
fig. 12 is a schematic structural diagram of an acquisition unit in an embodiment of the present application;
FIG. 13 is a schematic structural diagram of a computing unit in an embodiment of the present application;
FIG. 14 is a schematic structural diagram of a thickness generation module in an embodiment of the present application;
FIG. 15 is a schematic structural diagram of a characterization unit in an embodiment of the present application;
fig. 16 is a schematic structural diagram of an electronic device in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As used herein, the terms "first," "second," … …, etc. do not denote any order or order, nor are they used to limit the invention, but rather are used to distinguish one element from another element or operation described by the same technical terms.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
Aiming at the defects in the prior art, the method for depicting the stratigraphic trap provided by the invention has the flow chart as shown in fig. 1, and comprises the following steps:
s101: and acquiring a tuning point and a layer leveling target layer which can identify the inclined stratum and correspond to the inclined stratum.
Wherein the tuning points include: a maximum point of amplitude of the dipping formation or a minimum point of amplitude of the dipping formation may be identified.
S102: and intersecting the extension of the identifiable inclined stratum with the leveling target layer to generate a stratum inclination angle and a sharp vanishing point.
S103: and calculating and generating a stratum trap boundary according to the stratum inclination angle and the obtained tuning thickness corresponding to the tuning point according to a trigonometric law.
S104: and (4) according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap.
According to the process shown in fig. 1, the identifiable inclined stratum, the tuning point corresponding to the identifiable inclined stratum and the layer leveling target layer are firstly obtained, then the identifiable inclined stratum extends to intersect with the layer leveling target layer to generate a stratum inclination angle and a pinch-out point, a stratum encirclement boundary is generated according to the stratum inclination angle and the tuning thickness corresponding to the obtained tuning point and calculated according to a trigonometric law, and finally the stratum encirclement is generated by depicting according to the stratum encirclement boundary, so that the stratum encirclement is accurately depicted, and the method has the advantages of being high in accuracy and efficiency in depicting the stratum encirclement boundary.
In order to make the present invention better understood by those skilled in the art, a more detailed embodiment is listed below, and as shown in fig. 2, an embodiment of the present invention provides a method for characterizing a formation trap, the method comprising the steps of:
s201: and acquiring a target layer and a plurality of inclined stratums of the original seismic section.
Wherein the target layer includes: no integral facing or overlay facing.
In particular, as shown in FIG. 3, a target interval C1 of the original seismic section is obtained and extracted from a plurality of dipping beds C2 (not shown). The white dotted line of the original seismic section is a target layer C1, and the target layer C1 is an unconformity surface.
As shown in FIG. 4, a target interval C3 of the original seismic section is acquired and acquired from a number of dipping beds C4 (not shown). The white line of the original seismic section is a target layer C3, and the target layer C3 is a super-coverage layer.
Determining an inclined stratum by judging whether the in-phase axis in the original seismic section after the fault is leveled is continuous or not; if yes, the stratum is inclined, if not, the stratum is not inclined, and the application is not limited to this.
S202: and carrying out layer leveling on the original seismic section according to the target layer to generate a layer leveling target layer and an identifiable inclined stratum.
In specific implementation, as shown in fig. 5, the original seismic section is subjected to horizon leveling according to the target horizon C1 to generate a horizon leveling target horizon C1 'and an identifiable dipping stratum C2'. Wherein, the inclined stratum C2 with the best resolution effect in a plurality of inclined strata C2 in the original seismic section inclined strata after the layer is flattened is taken as the identifiable inclined stratum C2'.
As shown in fig. 6, performing horizon leveling on the original seismic section from the target horizon C3 yields a horizon leveling target horizon C3 'and an identifiable dipping horizon C4'. Wherein, the inclined stratum C4 with the best resolution effect in a plurality of inclined strata C4 in the original seismic section inclined strata after the layer is flattened is taken as the identifiable inclined stratum C4'.
S203: tuning points are obtained from the identifiable dipping strata.
Wherein the tuning points include: a maximum point of amplitude of the dipping formation or a minimum point of amplitude of the dipping formation may be identified.
In specific implementation, as shown in fig. 5, according to the identifiable inclined stratum C2 ', the maximum amplitude point in the identifiable inclined stratum C2' is obtained as the tuning point D1.
As shown in fig. 6, from the identifiable dipping formation C4 ', the minimum amplitude point in the identifiable dipping formation C4' is obtained as a tuning point D2.
S204: and intersecting the extension of the identifiable inclined stratum with the leveling target layer to generate a stratum inclination angle and a sharp vanishing point.
In particular, as shown in FIG. 7, the recognizable inclined stratum C2 'extends to intersect with the layer leveling target layer C1' to generate the stratum inclination angle
And a pinch-off point G.
S205: and calculating and generating a stratum trap boundary according to the stratum inclination angle and the obtained tuning thickness corresponding to the tuning point according to a trigonometric law.
As shown in fig. 8, the specific execution of step S205 includes the following steps:
s301: and calculating the tuning thickness corresponding to the tuning point according to the layer leveling target layer and the tuning point.
As shown in fig. 9, step S301 specifically executes the following steps:
s401: and acquiring the interval velocity of the interval leveling target interval and the tuning frequency of the original seismic section.
Specifically, a velocity field is established by obtaining a time-depth relationship of drilled wells, and then a layer velocity v is extracted along a layer leveling target layer. Obtaining the tuned frequency f of the original seismic section by performing a short-time Fourier transform on the original seismic section0。
S402: and calculating and generating the tuning thickness according to the layer speed and the tuning frequency.
Specifically, the calculation formula of the tuning thickness is shown in formula (1):
h＝v/4f0
where h is the tuning thickness, v is the layer velocity of the layer leveling target layer, f0To tune the frequency.
S302: and calculating and generating a stratum trapping boundary by utilizing a trigonometric theorem according to the tuning point, the sharp vanishing point, the tuning thickness and the stratum inclination angle.
In particular implementation, as shown in fig. 7, the stratigraphic trap boundary includes: distance X from tuning point D1 to pinch-off point G, tuning thickness h, and distance Y extrapolated from formation trap.
According to the cosine theorem, the calculation formula of the distance X from the tuning point D1 to the pinch-off point G is shown in formula (2):
wherein X is the distance from the tuning point D1 to the pinch-off point G, h is the tuning thickness from the tuning point D1 to the layer leveling target layer C1',
is the formation dip.
According to the sine theorem, the calculation formula of the distance Y extrapolated from the stratigraphic trap is shown in formula (3):
wherein Y is the distance extrapolated from the formation trap, h is the tuning thickness from the tuning point D1 to the layer leveling target layer C1',
is the formation dip.
S206: and (4) according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap.
In specific implementation, according to the dip angle of the stratum
And calculating the distance X from the tuning point D1 to the pinch-off point G, the tuning thickness h and the extrapolated distance Y of the formation trap to generate the formation trap expanded area S.
And (4) according to the amplified area of the stratigraphic trap, performing depiction to generate the stratigraphic trap.
As shown in fig. 10, the stratigraphic trap is generated by plotting the stratigraphic trap amplification area S.
Based on the same application concept as the method for depicting the stratigraphic trap, the invention also provides a system for depicting the stratigraphic trap, which is described in the following embodiment. Because the principle of solving the problems of the depicting system for stratigraphic trap is similar to the depicting method for stratigraphic trap, the implementation of the depicting system for stratigraphic trap can refer to the implementation of the depicting method for stratigraphic trap, and repeated parts are not described again.
Fig. 11 is a schematic structural diagram of a system for depicting a stratigraphic trap according to an embodiment of the present application, and as shown in fig. 11, the system for depicting a stratigraphic trap includes: an acquisition unit 101, an extension unit 102, a calculation unit 103, and a characterization unit 104.
The obtaining unit 101 is configured to obtain an identifiable inclined stratum, a tuning point corresponding to the identifiable inclined stratum, and a layer leveling target layer. Wherein the tuning points include: a maximum point of amplitude of the dipping formation or a minimum point of amplitude of the dipping formation may be identified.
And the extending unit 102 is used for extending the identifiable inclined stratum to intersect with the layer leveling target layer to generate a stratum inclination angle and a sharp vanishing point.
And the calculating unit 103 is used for calculating and generating a formation confinement boundary according to the formation inclination angle and the acquired tuning thickness corresponding to the tuning point and according to a trigonometric law.
And the drawing unit 104 is used for drawing the stratigraphic trap according to the stratigraphic trap boundary to generate the stratigraphic trap.
In one embodiment, as shown in fig. 12, the obtaining unit 101 includes: a first obtaining module 201, a leveling module 202, and a second obtaining module 203.
The first obtaining module 201 is configured to obtain a target zone and a plurality of inclined strata of an original seismic profile. Wherein the target layer includes: no integral facing or overlay facing.
And the leveling module 202 is used for performing layer leveling on the original seismic section according to the target layer to generate a layer leveling target layer and an identifiable inclined stratum. The inclined stratum can be identified as the inclined stratum with the best resolution effect in the original seismic section inclined stratum after the layer is leveled.
And a second obtaining module 203 for obtaining the tuning point according to the identifiable tilted stratum.
In one embodiment, as shown in fig. 13, the calculation unit 103 includes: a thickness generation module 301 and a boundary generation module 302.
And a thickness generation module 301, configured to calculate and generate a tuning thickness corresponding to the tuning point according to the layer leveling target layer and the tuning point.
And a boundary generating module 302, configured to calculate and generate a formation confinement boundary according to the tuning point, the vanishing point, the tuning thickness, and the formation dip angle by using trigonometric theorem.
In one embodiment, as shown in fig. 14, the thickness generation module 301 includes: an acquisition submodule 401 and a generation submodule 402.
The obtaining submodule 401 is configured to obtain the interval velocity of the interval leveling target interval and the tuning frequency of the original seismic profile.
And a generation submodule 402 for calculating and generating a tuning thickness according to the layer velocity and the tuning frequency.
In one embodiment, as shown in fig. 15, the characterization unit 104 includes: an area generation module 501 and a drawing module 502.
The area generating module 501 is configured to calculate and generate a formation trapping expanded area according to a formation trapping boundary;
the drawing module 502 is configured to draw the stratigraphic trap according to the stratigraphic trap amplification area to generate the stratigraphic trap.
Based on the same application concept as the above-mentioned method for depicting the stratigraphic trap, the present application provides a computer device, as described in the following embodiments. Because the principle of solving the problem of the computer equipment is similar to the method for describing the stratigraphic trap, the implementation of the computer equipment can refer to the implementation of the method for describing the stratigraphic trap, and repeated parts are not described again.
In an embodiment, an embodiment of the present application further provides a specific implementation manner of an electronic device, which is capable of implementing all steps in the method for depicting a stratigraphic trap in the foregoing embodiment, and as shown in fig. 16, the electronic device specifically includes the following contents: a processor (processor)601, a memory (memory)602, a communication Interface (Communications Interface)603, and a bus 604;
the processor 601, the memory 602 and the communication interface 603 complete mutual communication through the bus 604; the communication interface 603 is used for realizing information transmission between the depicting system of the stratigraphic trap and other participating mechanisms;
the processor 601 is configured to call a computer program in the memory 602, and when the processor executes the computer program, the processor implements all the steps of the method for depicting a stratigraphic trap in the foregoing embodiment, as shown in fig. 1, the processor implements the following steps when executing the computer program:
s101: and acquiring a tuning point and a layer leveling target layer which can identify the inclined stratum and correspond to the inclined stratum.
Wherein the tuning points include: a maximum point of amplitude of the dipping formation or a minimum point of amplitude of the dipping formation may be identified.
S102: and intersecting the extension of the identifiable inclined stratum with the leveling target layer to generate a stratum inclination angle and a sharp vanishing point.
S103: and calculating and generating a stratum trap boundary according to the stratum inclination angle and the obtained tuning thickness corresponding to the tuning point according to a trigonometric law.
S104: and (4) according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap.
Based on the same application concept as the above-mentioned method for depicting the stratigraphic trap, the present application provides a computer-readable storage medium, as described in the following embodiments. Because the principle of solving the problem of the computer-readable storage medium is similar to the method for describing the stratigraphic trap, the implementation of the computer-readable storage medium can refer to the implementation of the method for describing the stratigraphic trap, and repeated parts are not described again.
In one embodiment, a computer readable storage medium has stored thereon a computer program which, when executed by a processor, performs all the steps of the method for delineating a formation trap in the above embodiments, as shown in fig. 1, and which, when executed by a processor, performs the steps of:
s101: and acquiring a tuning point and a layer leveling target layer which can identify the inclined stratum and correspond to the inclined stratum.
Wherein the tuning points include: a maximum point of amplitude of the dipping formation or a minimum point of amplitude of the dipping formation may be identified.
S102: and intersecting the extension of the identifiable inclined stratum with the leveling target layer to generate a stratum inclination angle and a sharp vanishing point.
S103: and calculating and generating a stratum trap boundary according to the stratum inclination angle and the obtained tuning thickness corresponding to the tuning point according to a trigonometric law.
S104: and (4) according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap.
The invention provides a method and a system for depicting a stratigraphic trap, which comprise the following steps: acquiring a tuning point and a layer leveling target layer which can identify the inclined stratum and correspond to the inclined stratum; the tuning points include: identifying an amplitude maxima point or an amplitude minima point for a dipping formation; intersecting the extension of the identifiable inclined stratum with a layer leveling target layer to generate a stratum inclination angle and a sharp vanishing point; calculating and generating a stratum trapping boundary according to the stratum inclination angle and the obtained tuning thickness corresponding to the tuning point according to a trigonometric law; and (4) according to the stratigraphic trap boundary, depicting to generate the stratigraphic trap. The method and the device have the advantages that the thickness, the dip angle and the pinch-out point are tuned to carry out quantitative calculation, the accurate depicting of the stratigraphic confinement boundary is realized, and the accuracy and the calculation efficiency of the depicting of the stratigraphic confinement boundary are improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A method for depicting a formation trap is characterized by comprising the following steps:
acquiring an identifiable inclined stratum, a tuning point corresponding to the identifiable inclined stratum and a layer leveling target layer; the tuning points include: a maximum point of amplitude for the identified dipping formation or a minimum point of amplitude for the identified dipping formation;
intersecting the identifiable dip stratigraphic extension with the layer leveling target layer to generate a stratigraphic dip angle and a sharp vanishing point;
calculating and generating a stratum trapping boundary according to the stratum inclination angle and the acquired tuning thickness corresponding to the tuning point and a trigonometric law;
according to the stratigraphic trap boundary, depicting to generate a stratigraphic trap;
wherein, the obtaining of the identifiable inclined stratum, the tuning point corresponding to the identifiable inclined stratum and the layer leveling target layer comprises: acquiring a target layer and a plurality of inclined stratums of an original seismic section; the target layer includes: a non-integral or super-coated facing; performing layer leveling on the original seismic profile according to the target layer to generate a layer leveling target layer and the identifiable inclined stratum; the identifiable inclined stratum is an inclined stratum with the best resolution effect in the original seismic section inclined stratum after the layer is leveled; acquiring the tuning point according to the identifiable inclined stratum;
calculating and generating a formation trap boundary according to the formation dip angle and the obtained tuning thickness corresponding to the tuning point according to a trigonometric law, and the method comprises the following steps: calculating and generating a tuning thickness corresponding to the tuning point according to the layer leveling target layer and the tuning point; calculating and generating the stratigraphic trapping boundary by utilizing a trigonometric theorem according to the tuning point, the sharp-vanishing point, the tuning thickness and the stratigraphic dip angle;
calculating and generating the tuning thickness corresponding to the tuning point according to the layer leveling target layer and the tuning point, wherein the method comprises the following steps: acquiring the interval velocity of the interval leveling target interval and the tuning frequency of the original seismic profile; and calculating and generating the tuning thickness according to the layer speed and the tuning frequency.
2. The method for delineating a formation trap according to claim 1, wherein the delineating according to the formation trap boundary to generate a formation trap comprises:
calculating and generating a formation trapping amplification area according to the formation trapping boundary;
and according to the stratigraphic trap amplification area, depicting to generate the stratigraphic trap.
3. A method for delineating a formation trap according to claim 1, wherein the tuning thickness is calculated as follows:
h＝v/4f0
wherein h is the tuning thickness, v is the layer velocity of the layer leveling target layer, f0The tuned frequency of the original seismic section.
4. A system for characterizing a formation trap, comprising:
the acquisition unit is used for acquiring an identifiable inclined stratum, a tuning point corresponding to the identifiable inclined stratum and a layer leveling target layer; the tuning points include: a maximum point of amplitude for the identified dipping formation or a minimum point of amplitude for the identified dipping formation;
the extension unit is used for extending the identifiable inclined stratum to intersect with the leveling target layer to generate a stratum inclination angle and a sharp vanishing point;
the calculation unit is used for calculating and generating a stratum trap boundary according to the stratum inclination angle and the acquired tuning thickness corresponding to the tuning point according to a trigonometric law;
the depicting unit is used for depicting according to the stratigraphic trap boundary to generate a stratigraphic trap;
wherein the acquisition unit includes:
the first acquisition module is used for acquiring a target layer and a plurality of inclined stratums of an original seismic section; the target layer includes: a non-integral or super-coated facing;
the leveling module is used for leveling the original seismic section according to the target layer to generate a leveled target layer and the identifiable inclined stratum; the identifiable inclined stratum is an inclined stratum with the best resolution effect in the original seismic section inclined stratum after the layer is leveled;
a second obtaining module, configured to obtain the tuning point according to the identifiable dipping stratum;
the calculation unit includes:
the thickness generating module is used for calculating and generating the tuning thickness corresponding to the tuning point according to the layer leveling target layer and the tuning point;
the boundary generating module is used for calculating and generating the stratigraphic confinement boundary by utilizing a trigonometric theorem according to the tuning point, the point-vanishing point, the tuning thickness and the stratigraphic dip angle;
the thickness generation module includes:
the acquisition submodule is used for acquiring the interval velocity of the interval leveling target interval and the tuning frequency of the original seismic profile;
and the generation submodule is used for calculating and generating the tuning thickness according to the layer speed and the tuning frequency.
5. A system for delineation of a formation trap according to claim 4, wherein the delineation unit comprises:
the area generation module is used for calculating and generating a stratum trap amplification area according to the stratum trap boundary;
and the drawing module is used for drawing according to the stratigraphic trap amplification area to generate the stratigraphic trap.
6. The system for delineation of a formation trap as claimed in claim 4, wherein the tuning thickness is calculated as follows:
h＝v/4f0
wherein h is the tuning thickness, v is the layer velocity of the layer leveling target layer, f0The tuned frequency of the original seismic section.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, carries out the steps of the method for delineating a formation trap according to any of claims 1 to 3.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for delineating a formation trap according to any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910124321.5A CN109917455B (en) | 2019-02-19 | 2019-02-19 | Method and system for depicting formation trap |
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| CN201910124321.5A CN109917455B (en) | 2019-02-19 | 2019-02-19 | Method and system for depicting formation trap |
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