CN112904423A - Method and device for carving continental river - Google Patents
Method and device for carving continental river Download PDFInfo
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Abstract
The invention provides a method and a device for carving a continental river, wherein the method comprises the following steps: converting the time domain seismic data of the target work area into Wheeler domain seismic data; performing unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data; and carving the continental facies river channel according to the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention can fully utilize earthquake data to identify the river channel in the continental facies deposition, and accurately and quantitatively carve the spreading form of the river channel in the space.
Description
Technical Field
The invention relates to the field of oil exploration, in particular to a method and a device for carving a continental river.
Background
In recent years, I have found more and more oil and gas reservoirs in continental rivers, particularly have encountered multiple wells in the dense sandstone reservoir of the Jurassic system in the middle area of the Sichuan basin and confirmed that the high-quality reservoir exists in the sand body of the continental river, and the Li Qingzhong academy has written a word that the river always paves the carried sediments by frequent swinging and diversion on the plain. The sinking rate of the basin is very slow, so that the meandering and braided rivers are like the machines for plowing the land, and the sediments falling on the ground are continuously carried and tossed back and forth. After tens of thousands of years, the sediments in the basin are changed into a disordered 'mixture', and a complete river channel cannot be found on the plane, namely, the beach and the oxen-yoke lake are not mentioned. Therefore, it is difficult to accurately and effectively find a continental river course by using the conventional seismic exploration technology.
In summary, there is a need for a quantitative carving technique for river channels in continental formations.
Disclosure of Invention
Aiming at the problem that the prior art lacks a quantitative carving technology for riverways in continental facies strata, the method and the device for carving the continental facies riverways can identify the riverways in the continental facies deposition by utilizing three-dimensional seismic data and quantitatively carve the spreading form of the riverways in space.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a method for carving a continental river, comprising:
converting the time domain seismic data of the target work area into Wheeler domain seismic data;
performing unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data;
and carving the continental facies river channel according to the corrected Wheeler domain seismic data.
In one embodiment, the determining the isochronism of the Wheeler domain seismic data comprises:
performing linkage comparison on the time slice of the conventional seismic data of the target work area and the stratigraphic slice of the Wheeler domain seismic data to generate a comparison result;
and judging whether the event axes of the Wheeler domain seismic data are equal or not by using a residual dip angle method according to the comparison result.
In one embodiment, the carving the terrestrial river according to the corrected Wheeler domain seismic data comprises:
calibrating the seismic data in the Wheeler domain by using the drilling data to generate the seismic facies of the terrestrial river;
and tracking the boundary of the terrestrial river channel in the corrected Wheeler domain seismic data according to the seismic facies.
In an embodiment, the carving the terrestrial river according to the corrected Wheeler domain seismic data further includes:
generating a relational expression between the thickness of the continental facies river channel and the amplitude of the continental facies river channel by using a wave equation forward modeling method;
tracking the boundary of the terrestrial river channel in the corrected Wheeler domain seismic data according to the relation.
In a second aspect, the present invention provides an engraving device for a terrestrial river, comprising:
the seismic data conversion unit is used for converting the time domain seismic data of the target work area into Wheeler domain seismic data;
the seismic data generation unit is used for performing unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data;
and the riverway carving unit is used for carving the land-based riverway according to the corrected Wheeler domain seismic data.
In one embodiment, the carving device of the terrestrial river further comprises: an isochronism determination unit configured to determine isochronism of the Wheeler domain seismic data, the isochronism determination unit including:
the comparison result generation module is used for performing linkage comparison on the time slice of the conventional seismic data of the target work area and the stratigraphic slice of the Wheeler domain seismic data to generate a comparison result;
and the event judging module is used for judging whether the event of the Wheeler domain seismic data is equal or not by utilizing a residual dip angle method according to the comparison result.
In one embodiment, the river carving unit includes:
the seismic facies generation module is used for calibrating the Wheeler domain seismic data by using the drilling data to generate the seismic facies of the continental facies riverway;
a boundary tracking first module for tracking a boundary of the terrestrial river in the corrected Wheeler domain seismic data according to the seismic facies.
In one embodiment, the river carving unit further comprises:
the relational expression generating module is used for generating a relational expression between the thickness of the continental facies river channel and the amplitude of the continental facies river channel by utilizing a wave equation forward modeling method;
a second boundary tracking module to track the boundary of the terrestrial river in the corrected Wheeler domain seismic data according to the relationship.
In a third aspect, the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for carving a continental river.
In a fourth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for carving a terrestrial river.
As can be seen from the above description, the carving method and device for the terrestrial river according to the embodiments of the present invention firstly perform isochronism correction on Wheeler domain seismic data based on the Wheeler domain seismic data (the Wheeler domain data can accurately track the isochronism interface in the terrestrial river environment), and finally track the terrestrial river based on the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention solves the problem that the quantitative carving technology aiming at the river channel in the continental facies stratum is lacked in the prior art, and fully utilizes the three-dimensional seismic data to identify the river channel in the continental facies deposition, and accurately and quantitatively carves the spreading form of the river channel in the space.
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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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic flow chart of a method for engraving a continental river channel according to an embodiment of the present invention;
fig. 2 is a second schematic flow chart of a method for engraving a continental river channel according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a step 400 according to an embodiment of the present invention;
FIG. 4 is a first flowchart illustrating step 300 according to an embodiment of the present invention;
FIG. 5 is a second flowchart illustrating step 300 according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for carving a continental river according to an embodiment of the present invention;
FIG. 7 is a cross-section of the wheeler domain in an embodiment of the present invention;
FIG. 8 is a schematic illustration of a river channel in an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of the river at stage 8 in the temple area of the Gong mountain in an embodiment of the present invention;
FIG. 10 is a schematic diagram illustrating a spatial distribution pattern of the river in the temple area stage 8 in the Gong mountain of the embodiment of the present invention;
fig. 11 is a first structural block diagram of an engraving device for a continental river channel in an embodiment of the present invention;
fig. 12 is a block diagram of a carving device of a continental river channel in the embodiment of the invention;
fig. 13 is a first structural block diagram of a river channel carving unit according to an embodiment of the present invention;
fig. 14 is a structural block diagram of a river channel carving unit in the embodiment of the invention;
fig. 15 is a schematic structural diagram of an electronic device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Terrestrial riverways frequently divert, so that the reflection event of the stratum cannot be continuously tracked in large segments, and the event is frequently interrupted, branched and merged. Therefore, if the interpreter always converts forward along the intermittent valleys (or peaks) according to the conventional stratum interpretation habit, the conversion is converted to the non-parallel positions, and only one phase can be skipped to advance. There is an abnormal change in amplitude each time a jump phase is encountered and each time a bifurcation merger is encountered, this contrast method generally forces it to close on the plan view of the three-dimensional data volume.
In view of the above technical problems, an embodiment of the present invention provides a specific implementation manner of a carving method of a continental river, and referring to fig. 1, the method specifically includes the following steps:
step 100: and converting the time domain seismic data of the target work area into Wheeler domain seismic data.
It will be appreciated that each time slice in the longitudinal direction of Wheeler data may represent strata deposited in the same geologic time, and that instead of representing a time domain or depth domain seismic data volume, it may be transformed into a geologic time domain, representing the distribution of strata in the conventional geologic time-space domain and associated events such as depositional or erosive denudation, which Wheeler domain data can visually depict. Therefore, in order to accurately track the isochronous interface under the terrestrial river phase environment, the seismic geomorphology-based method carries out sequence interpretation in a Wheeler domain, carries out isochronism analysis on each horizon, and carries out nonlinear adjustment in an unequal time domain through linkage comparison of a plane and a section.
Step 200: performing an unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data.
Specifically, an original seismic section, a section subjected to 90-degree phase shift and a corresponding stratigraphic slice are displayed in a linkage manner, and whether the sections have an unequal time phenomenon or not is checked through previewing the sections. And performing nonlinear correction of polygon constraint at the position where the unequal time phenomenon exists. And selecting isochronous slices by adjusting the positions of the slices and splicing to generate corrected Wheeler domain seismic data.
Step 300: and carving the continental facies river channel according to the corrected Wheeler domain seismic data.
Specifically, a geological model in a river channel development period is built by utilizing small layers based on Wheeler domain fine sequence interpretation. And then, under the constraint of the geological model, representing the amplitude value of the seismic trace curve by a certain color, so that a three-dimensional seismic trace data volume becomes a data volume represented by different color volumes. And then, adjusting parameters in the three-dimensional visualization body interpretation, namely the value and the value range of the seed point, by using the relation between the riverway and the amplitude obtained by forward modeling. And finally, interactively tracking each river channel to determine the boundary, the top and the bottom of the river channel.
As can be seen from the above description, the carving method of the terrestrial river channel provided by the embodiment of the present invention firstly performs isochronism correction on Wheeler domain seismic data on the basis of the Wheeler domain seismic data (the Wheeler domain data can accurately track the isochronism interface in the terrestrial river channel environment), and finally tracks the terrestrial river channel on the basis of the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention solves the problem that the quantitative carving technology aiming at the river channel in the continental facies stratum is lacked in the prior art, and fully utilizes the three-dimensional seismic data to identify the river channel in the continental facies deposition, and accurately and quantitatively carves the spreading form of the river channel in the space.
In an embodiment, referring to fig. 2, the method for carving a terrestrial river further includes:
step 400: and performing isochronism judgment on the Wheeler domain seismic data.
In one embodiment, referring to fig. 3, step 400 specifically includes:
step 401: and performing linkage comparison on the time slice of the conventional seismic data of the target work area and the stratigraphic slice of the Wheeler domain seismic data to generate a comparison result.
Step 402: and judging whether the event axes of the Wheeler domain seismic data are equal or not by using a residual dip angle method according to the comparison result.
It will be appreciated that the method of determining whether the in-phase axes are equal in the Wheeler data volume is the residual tilt method. The method is realized on the basis of the stratigraphic slice data volume, namely, whether the generated stratigraphic slice data volume is equal or not is judged. The slice isochronism analysis was performed by performing a linked comparison of the time slices of the sliced isochronism data volume and the data volume slices of the Wheeler data volume.
In one embodiment, referring to fig. 4, step 300 comprises:
step 301: and calibrating the seismic data in the Wheeler domain by using the well drilling data to generate the seismic facies of the terrestrial river.
Step 302: and tracking the boundary of the terrestrial river channel in the corrected Wheeler domain seismic data according to the seismic facies.
In the specific implementation of steps 301 and 302, it is first necessary to determine a corresponding mode of a terrestrial river, and the terrestrial river response mode is mainly determined by two methods: firstly, establishing a seismic phase mode of the river channel through fine calibration of drilled wells, wherein the seismic phase mode is mainly represented by short-axis-shaped strong amplitude, the top boundary of the river channel is a wave trough, and the bottom boundary of the river channel is a wave crest. And forward modeling by using a wave equation, and defining the river channel characteristics which can be identified by using three-dimensional data and the quantitative relation between the river channel and the amplitude. Establishing a wedge forward modeling model, wherein the design of the river channel thickness comes from actual well data, forward modeling parameters come from actual field acquisition parameters, and forward modeling is carried out by adopting a wave equation forward modeling method to obtain seismic response characteristics of different river channel thicknesses; and then counting the thickness of the river channel of a single well in the work area, extracting the maximum peak amplitude value at the well point, carrying out intersection analysis on the maximum peak amplitude value and the maximum peak amplitude value to obtain a relation that the thickness and the earthquake peak amplitude are in a nonlinear positive correlation, and fitting a relation that the river channel thickness changes along with the amplitude.
In one embodiment, referring to fig. 5, step 300 may further include:
In step 30a and step 30b, a geological model in the river course development period is established by using small layers based on Wheeler domain fine sequence interpretation. And then, under the constraint of the geological model, representing the amplitude value of the seismic trace curve by a certain color, so that a three-dimensional seismic trace data volume becomes a data volume represented by different color volumes. And then, adjusting parameters in the three-dimensional visualization body interpretation, namely the value and the value range of the seed point, by using the relation between the riverway and the amplitude obtained by forward modeling. And finally, interactively tracking each river channel to determine the boundary, the top and the bottom of the river channel.
As can be seen from the above description, the carving method of the terrestrial river channel provided by the embodiment of the present invention firstly performs isochronism correction on Wheeler domain seismic data on the basis of the Wheeler domain seismic data (the Wheeler domain data can accurately track the isochronism interface in the terrestrial river channel environment), and finally tracks the terrestrial river channel on the basis of the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention solves the problem that the quantitative carving technology aiming at the river channel in the continental facies stratum is lacked in the prior art, and fully utilizes the three-dimensional seismic data to identify the river channel in the continental facies deposition, and accurately and quantitatively carves the spreading form of the river channel in the space.
To further explain the scheme, the invention takes the gong-temple region and the high-stone-ladder-brook region in the Sichuan basin as examples, and provides a specific application example of the terrestrial river channel carving method, and the specific application example specifically comprises the following contents, and refer to fig. 6.
The three-dimensional visualization technology starts in the late 80's of the 20 th century, but the application of the technology is limited due to the limitation of computer hardware conditions. Three-dimensional visualization techniques have matured day by day after the middle of the 90 s of the 20 th century. The basic principle is that the seismic reflectivity of an underground reflection interface is directly evaluated in a three-dimensional space by performing transparency adjustment and three-dimensional display on seismic data. In short, the amplitude of the seismic trace curve is expressed by a certain color, so that a three-dimensional seismic trace data volume becomes a data volume represented by a different color volume.
In the carving of the continental river channel, firstly, fine river channel characteristic calibration is carried out through actual drilling data, an earthquake response mode of the river channel is determined through forward modeling based on a wave equation, and the color body range of the river channel in a three-dimensional visualization window is determined. Then, in the three-dimensional visualization interpretation, the boundary of the river is tracked through seed point tracking. And finally, determining the top interface and the bottom interface of the river channel by tracking the seed points in the longitudinal direction on the basis of fine sequence interpretation.
S0: and converting the time domain data body into a Wheeler domain data body.
The conventional seismic data are used for sequence division, sedimentary facies identification, sedimentary evolution analysis and reservoir prediction, and the method has strong multi-solution performance due to the influence of the current construction trend. Due to the isochronism, the stratum gyrus is clear, the spreading range is clear, the well seismic calibration is convenient for sequence and system domain division, sand bodies are easy to identify, the sedimentary evolution process analysis of the stratum can be carried out, the distribution characteristics and the cause of the sand bodies can be analyzed under the phase control constraint, favorable reservoirs can be evaluated, and the multi-solution property can be reduced. And computing by using Geosed software through a corresponding algorithm (Wheeler conversion method) to obtain a converted Wheeler domain data volume, and referring to fig. 7, thereby realizing the rapid browsing of the stratum slice.
S1: isochronism analysis of stratigraphic slices.
Referring to fig. 8, whether the in-phase axes are equal or not is judged in Wheeler body by the residual inclination method. It is understood that the method is implemented on the basis of a stratigraphic slice data volume, i.e., whether the generated stratigraphic slice data volume is isochronous or not is judged. The slice isochronism analysis was performed by performing a linked comparison of the time slices of the sliced isochronism data volume and the data volume slices of the Wheeler data volume. When the mouse cursor moves on one slice, the cursor appears at the same position of the other slice. It can be seen that the right slice is shown in sporadic gray, which indicates that the slices are relatively unequally positioned. From this it can be concluded that: the slice has good whole isochronism and local non-equal time phenomenon.
S2: and correcting the non-linear isochronism of the stratigraphic slice.
And (3) performing linkage display on the original seismic section, the section subjected to 90-degree phase shift and the corresponding stratigraphic slice, and checking whether the slices have the unequal time phenomenon or not by previewing the slices. And performing nonlinear correction of polygon constraint at the position where the unequal time phenomenon exists. And selecting the isochronous slices by adjusting the positions of the slices and splicing.
S3: and (4) quantitative classification of river channel response modes.
There are two main ways to determine the river response pattern: firstly, establishing a seismic phase mode of the river channel through fine calibration of drilled wells, wherein the seismic phase mode is mainly represented by short-axis-shaped strong amplitude, the top boundary of the river channel is a wave trough, and the bottom boundary of the river channel is a wave crest. And forward modeling by using a wave equation, and defining the river channel characteristics which can be identified by using three-dimensional data and the quantitative relation between the river channel and the amplitude. Establishing a wedge forward modeling model, wherein the design of the river channel thickness comes from actual well data, forward modeling parameters come from actual field acquisition parameters, and forward modeling is carried out by adopting a wave equation forward modeling method to obtain seismic response characteristics of different river channel thicknesses; then, the river channel thickness of a single well in the work area is counted, the maximum peak amplitude value is extracted at the well point, intersection analysis is carried out on the river channel thickness and the maximum peak amplitude value, the nonlinear positive correlation relation between the thickness and the seismic peak amplitude is obtained, and a relation that the river channel thickness changes along with the amplitude is fitted, and the relation is shown in fig. 8.
S4: the three-dimensional body interpretation technology carves the boundary and the top and the bottom of the river channel.
Firstly, establishing a geological model in a river channel development period by utilizing small layers based on Wheeler domain fine sequence interpretation. And then, under the constraint of the geological model, representing the amplitude value of the seismic trace curve by a certain color, so that a three-dimensional seismic trace data volume becomes a data volume represented by different color volumes. And then, adjusting parameters in the three-dimensional visualization body interpretation, namely the value and the value range of the seed point, by using the relation between the riverway and the amplitude obtained by forward modeling. Finally, each river channel is interactively tracked to determine the boundary, top and bottom of the river channel, see fig. 9 and fig. 10.
By utilizing the method provided by the specific embodiment, the carving of the terrestrial river channels is carried out in the Gongshan temple area and the high shitai xi area in the Sichuan basin, the 23-stage river channel of the Jurashi temple group is carved, the area is nearly 5000km2, and the task of capacity construction of 300 ten thousand tons in the shallow dense oil field in the Sichuan basin is effectively supported.
As can be seen from the above description, the carving method of the terrestrial river channel provided by the embodiment of the present invention firstly performs isochronism correction on Wheeler domain seismic data on the basis of the Wheeler domain seismic data (the Wheeler domain data can accurately track the isochronism interface in the terrestrial river channel environment), and finally tracks the terrestrial river channel on the basis of the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention solves the problem that the quantitative carving technology aiming at the river channel in the continental facies stratum is lacked in the prior art, and fully utilizes the three-dimensional seismic data to identify the river channel in the continental facies deposition, and accurately and quantitatively carves the spreading form of the river channel in the space.
Based on the same inventive concept, the embodiment of the present application further provides an engraving device for a terrestrial river, which can be used to implement the method described in the above embodiment, such as the following embodiments. Because the principle of solving the problems of the engraving device of the continental river channel is similar to the engraving method of the continental river channel, the implementation of the engraving device of the continental river channel can be realized by the engraving method of the continental river channel, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. While the system described in the embodiments below is preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
The embodiment of the present invention provides a specific implementation manner of a carving device of a terrestrial river channel, which can implement the carving method of the terrestrial river channel, and referring to fig. 11, the carving device of the terrestrial river channel specifically includes the following contents:
the seismic data conversion unit 10 is used for converting the time domain seismic data of the target work area into Wheeler domain seismic data;
a seismic data generation unit 20, configured to perform unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data;
and the river channel carving unit 30 is used for carving the land-based river channel according to the corrected Wheeler domain seismic data.
In one embodiment, referring to fig. 12, the engraving device for terrestrial river further comprises: an isochronism determining unit 40 configured to determine isochronism of the Wheeler domain seismic data, wherein the isochronism determining unit 40 includes:
a comparison result generation module 401, configured to perform linkage comparison on the time slice of the conventional seismic data of the target work area and the stratigraphic slice of the Wheeler domain seismic data to generate a comparison result;
and the event judging module 402 is configured to judge whether the event of the Wheeler domain seismic data is equal by using a residual dip method according to the comparison result.
In one embodiment, referring to fig. 13, the channel carving unit 30 includes:
the seismic facies generation module 301 is configured to calibrate the seismic data in the Wheeler domain by using the drilling data, and generate a seismic facies of the terrestrial river;
a boundary tracking first module 302 for tracking a boundary of the terrestrial river in the corrected Wheeler domain seismic data from the seismic facies.
In an embodiment, referring to fig. 14, the river carving unit 30 further includes:
the relational expression generating module 30a is configured to generate a relational expression between the thickness of the continental facies river and the amplitude thereof by using a wave equation forward modeling method;
a boundary tracking second module 30b for tracking the boundary of the terrestrial river in the corrected Wheeler domain seismic data according to the relationship.
As can be seen from the above description, the carving device for a terrestrial river according to the embodiment of the present invention firstly performs isochronism correction on Wheeler domain seismic data based on the Wheeler domain seismic data (the Wheeler domain data can accurately track an isochronism interface in a terrestrial river environment), and finally tracks the terrestrial river based on the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention solves the problem that the quantitative carving technology aiming at the river channel in the continental facies stratum is lacked in the prior art, and fully utilizes the three-dimensional seismic data to identify the river channel in the continental facies deposition, and accurately and quantitatively carves the spreading form of the river channel in the space.
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 carving method of the terrestrial river channel in the foregoing embodiment, and referring to fig. 15, the electronic device specifically includes the following contents:
a processor (processor)1201, a memory (memory)1202, a communication Interface 1203, and a bus 1204;
the processor 1201, the memory 1202 and the communication interface 1203 complete communication with each other through the bus 1204; the communication interface 1203 is configured to implement information transmission between related devices, such as a server-side device, an acquisition device, and a client device.
The processor 1201 is used to call the computer program in the memory 1202, and the processor executes the computer program to implement all the steps in the carving method of the terrestrial river channel in the above-mentioned embodiment, for example, the processor executes the computer program to implement the following steps:
step 100: and converting the time domain seismic data of the target work area into Wheeler domain seismic data.
Step 200: performing an unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data.
Step 300: and carving the continental facies river channel according to the corrected Wheeler domain seismic data.
As can be seen from the above description, the electronic device in the embodiment of the present application first performs isochronism correction on Wheeler domain seismic data based on the Wheeler domain seismic data (the Wheeler domain data can accurately track the isochronism interface in the terrestrial river facies environment), and finally tracks the terrestrial river based on the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention solves the problem that the quantitative carving technology aiming at the river channel in the continental facies stratum is lacked in the prior art, and fully utilizes the three-dimensional seismic data to identify the river channel in the continental facies deposition, and accurately and quantitatively carves the spreading form of the river channel in the space.
Embodiments of the present application further provide a computer-readable storage medium capable of implementing all steps in the carving method of the terrestrial river channel in the above embodiments, where the computer-readable storage medium stores thereon a computer program, and the computer program implements all steps of the carving method of the terrestrial river channel in the above embodiments when executed by a processor, for example, the processor implements the following steps when executing the computer program:
step 100: and converting the time domain seismic data of the target work area into Wheeler domain seismic data.
Step 200: performing an unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data.
Step 300: and carving the continental facies river channel according to the corrected Wheeler domain seismic data.
As can be seen from the above description, the computer-readable storage medium in the embodiment of the present application first performs isochronism correction on Wheeler domain seismic data on the basis of the Wheeler domain seismic data, which can accurately track an isochronism interface in a terrestrial river environment, and finally tracks a terrestrial river based on the corrected Wheeler domain seismic data. The carving method of the continental facies river channel provided by the invention solves the problem that the quantitative carving technology aiming at the river channel in the continental facies stratum is lacked in the prior art, and fully utilizes the three-dimensional seismic data to identify the river channel in the continental facies deposition, and accurately and quantitatively carves the spreading form of the river channel in the space.
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 present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
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 (10)
1. A method for carving a continental river channel is characterized by comprising the following steps:
converting the time domain seismic data of the target work area into Wheeler domain seismic data;
performing unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data;
and carving the continental facies river channel according to the corrected Wheeler domain seismic data.
2. The engraving method of claim 1, further comprising: and performing isochronism judgment on the Wheeler domain seismic data, wherein the isochronism judgment comprises the following steps:
performing linkage comparison on the time slice of the conventional seismic data of the target work area and the stratigraphic slice of the Wheeler domain seismic data to generate a comparison result;
and judging whether the event axes of the Wheeler domain seismic data are equal or not by using a residual dip angle method according to the comparison result.
3. The sculpting method of claim 1, wherein the sculpting of the terrestrial river from the corrected Wheeler domain seismic data comprises:
calibrating the seismic data in the Wheeler domain by using the drilling data to generate the seismic facies of the terrestrial river;
and tracking the boundary of the terrestrial river channel in the corrected Wheeler domain seismic data according to the seismic facies.
4. The sculpting method of claim 1, wherein the sculpting of the terrestrial river from the corrected Wheeler domain seismic data further comprises:
generating a relational expression between the thickness of the continental facies river channel and the amplitude of the continental facies river channel by using a wave equation forward modeling method;
tracking the boundary of the terrestrial river channel in the corrected Wheeler domain seismic data according to the relation.
5. An engraving device of a continental river, comprising:
the seismic data conversion unit is used for converting the time domain seismic data of the target work area into Wheeler domain seismic data;
the seismic data generation unit is used for performing unequal time correction on the Wheeler seismic data to generate corrected Wheeler domain seismic data;
and the riverway carving unit is used for carving the land-based riverway according to the corrected Wheeler domain seismic data.
6. The engraving device of claim 5, further comprising: an isochronism determination unit configured to determine isochronism of the Wheeler domain seismic data, the isochronism determination unit including:
the comparison result generation module is used for performing linkage comparison on the time slice of the conventional seismic data of the target work area and the stratigraphic slice of the Wheeler domain seismic data to generate a comparison result;
and the event judging module is used for judging whether the event of the Wheeler domain seismic data is equal or not by utilizing a residual dip angle method according to the comparison result.
7. The engraving device of claim 5, wherein the waterway engraving unit comprises:
the seismic facies generation module is used for calibrating the Wheeler domain seismic data by using the drilling data to generate the seismic facies of the continental facies riverway;
a boundary tracking first module for tracking a boundary of the terrestrial river in the corrected Wheeler domain seismic data according to the seismic facies.
8. The engraving device of claim 5, wherein the waterway engraving unit further comprises: further comprising:
the relational expression generating module is used for generating a relational expression between the thickness of the continental facies river channel and the amplitude of the continental facies river channel by utilizing a wave equation forward modeling method;
a second boundary tracking module to track the boundary of the terrestrial river in the corrected Wheeler domain seismic data according to the relationship.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method for carving a terrestrial river according to any one of claims 1 to 4.
10. 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 of carving a terrestrial river according to any one of claims 1 to 4.
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