Characterization method, device and equipment of ancient expansion spine construction system and storage medium

Abstract

The invention discloses a characterization method, device and equipment of an ancient expansion spine construction system and a storage medium, and relates to the technical field of data processing, and the method comprises the steps: obtaining geological-geophysical multi-dimensional data representing the ancient expansion spine construction system; determining target feature data of the research area according to the geological-geophysical multi-dimensional data; wherein the target characteristic data comprises landform characteristics of the research area, a sequence stratigraphic structure, a development position and an extension length of a fracture system, an igneous rock bottom structure and distribution of a magnetic anomaly strip; and according to the target feature data, establishing a corresponding scene of the landform, the sequence stratum and the fracture system, determining a dynamic mechanism of the development process of the ancient expansion spine, and further constructing a geologic model representing the ancient expansion spine construction system. By comprehensively considering various factors of the development of the ancient expanded spine construction system, the geodynamics mechanism of the characterization process of the ancient expanded spine construction system and the construction-sedimentary evolution process closer to the real ancient expanded spine can be explained in detail.

Description

Technical Field

[0001] The present application relates to the field of data processing technology, and in particular to a method, device, equipment and storage medium for characterizing an ancient expansion ridge construction system. Background Art

[0002] The construction system of the ancient spreading ridges in the ocean basin contains important evidence of seafloor expansion and the formation and evolution of the ocean basin. It is also part of the complex dynamic process of the oceanic plate. Its oceanic crust magmatic activity and hydrothermal circulation are directly related to hydrothermal mineral resources. The characterization of the construction system of the ancient spreading ridge is the basis for in-depth research on scientific innovation and resource exploration. The formation of the construction system of the ancient spreading ridge is controlled by many factors. In the context of large-scale tectonic settings, the development of sedimentary strata and the shaping of topography and landforms are all controlled by this. The topography and landforms are transformed under the influence of tectonic action-sedimentary environment, and the filling and deformation of sedimentary strata under tectonic action. However, the relevant technology has a superficial or one-sided understanding of the construction system of the ancient spreading ridge, and it is difficult to achieve a detailed interpretation of the construction system of the ancient spreading ridge. Summary of the invention

[0003] The main purpose of the embodiments of the present application is to propose a method, device, equipment and storage medium for characterizing an ancient expansion ridge construction system to improve the level of refinement in characterizing an ancient expansion ridge construction system.

[0004] To achieve the above object, one aspect of an embodiment of the present application provides a method for characterizing a paleo-expansion ridge construction system, the method comprising the following steps:

[0005] Acquire geological-geophysical multidimensional data characterizing the paleo-spreading ridge construction system;

[0006] Determine target characteristic data of the study area according to the geological-geophysical multidimensional data; wherein the target characteristic data include geomorphic features, sequence stratigraphic structure, development location and extension length of fault system, igneous rock diapir structure and distribution of magnetic anomaly bands of the study area;

[0007] According to the target characteristic data, the corresponding scenes of landform, sequence stratigraphy and the fault system are constructed, and the dynamic mechanism of the development process of the ancient spreading ridge is determined, so as to construct a geological model characterizing the construction system of the ancient spreading ridge.

[0008] In some embodiments, the step of determining the geomorphic features according to the geological-geophysical multidimensional data comprises the following steps:

[0009] Determine seafloor topography parameters based on multi-beam bathymetric data in the geological-geophysical multidimensional data;

[0010] Dividing different types of geomorphic units according to the seabed topographic parameters;

[0011] The landform is formed according to the morphological characteristics and material composition of each of the landform units;

[0012] Different geomorphic systems are formed by utilizing the structural features, sedimentary features and genesis of each of the geomorphic forms;

[0013] The spatial arrangement and combination of each of the landform systems in the study area is determined as the landform feature.

[0014] In some embodiments, the step of determining the sequence stratigraphic structure according to the geological-geophysical multidimensional data comprises the following steps:

[0015] Determine the seismic reflection surface characteristics and lithology mutation surface according to the seismic profile, shallow stratigraphic profile and drilling data in the geological-geophysical multidimensional data;

[0016] The sequence stratigraphic interface is identified according to the seismic reflection surface characteristics and the lithology mutation surface, and the sequence sequence is divided according to the sequence stratigraphic interface to obtain the sequence stratigraphic structure.

[0017] In some embodiments, the step of determining the development position and the extension length of the fracture system according to the geological-geophysical multidimensional data comprises the following steps:

[0018] According to the geological-geophysical multidimensional data, the position where the reflected wave is misaligned, the number of reflected wave common-direction axes suddenly changes, the shape of the reflected wave common-direction axes suddenly changes, the reflected wave is irregular and blank reflection occurs, the reflected wave common-direction axes bifurcate, merge, twist, strong phase and strong amplitude conversion occurs, or abnormal waves appear is identified as the misaligned position;

[0019] Identify the fault position on the seismic section, mark the fault point at the fault position, and connect the fault points to obtain a fault line;

[0020] The breakpoints belonging to the same fault on each of the seismic sections are combined on a plane according to the fault line to obtain a planar distribution map of the fault system; wherein the planar distribution map includes the development position and the extension length of the fault system.

[0021] In some embodiments, combining the breakpoints belonging to the same fault on each of the seismic sections on a plane according to the fault line to obtain a plane distribution map of the fault system comprises the following steps:

[0022] According to the fault line, the breakpoints belonging to the basin-controlling level faults on each of the seismic sections are first combined on the plane, and then according to the fault line, the breakpoints of the secondary faults of the basin-controlling level faults on each of the seismic sections are combined on the plane to obtain the fracture surface, fracture attitude, breakpoint, fault distance and fracture direction of each fracture, and then obtain the plane distribution map of the fracture system; wherein, when combining the breakpoints, the change law of the formation attitude in the same fault is the same and the breakpoint combination conforms to the law of fracture mechanics properties.

[0023] In some embodiments, the step of determining the igneous rock diapir structure according to the geological-geophysical multidimensional data comprises the following steps:

[0024] According to the seismic reflection characteristics in the geological-geophysical multidimensional data, the piercing igneous body and the hidden piercing igneous body are identified, and the morphological characteristics and planar distribution of the piercing igneous body and the hidden piercing igneous body are determined as the igneous rock diapir structure.

[0025] In some embodiments, the method further comprises the following steps:

[0026] The distribution of the igneous diapir structure and the magnetic anomaly band is added to the planar distribution map of the fracture system.

[0027] To achieve the above-mentioned purpose, another aspect of the embodiment of the present application provides a characterization device for a paleo-expansion ridge construction system, the device comprising:

[0028] A data acquisition unit for acquiring geological-geophysical multidimensional data characterizing the paleo-spreading ridge construction system;

[0029] A feature acquisition unit, used to determine target feature data of the study area according to the geological-geophysical multidimensional data; wherein the target feature data includes the geomorphic features, sequence stratigraphic structure, development position and extension length of the fault system, igneous rock diapir structure and distribution of magnetic anomaly bands of the study area;

[0030] The model characterization unit is used to build corresponding scenes of landforms, sequence stratigraphy and the fault system according to the target characteristic data, and determine the dynamic mechanism of the development process of the ancient spreading ridge, so as to construct a geological model that characterizes the construction system of the ancient spreading ridge.

[0031] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application proposes an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the above-mentioned method for characterizing an ancient expansion ridge construction system.

[0032] To achieve the above-mentioned purpose, another aspect of an embodiment of the present application proposes a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned method for characterizing a paleo-expansion ridge construction system is implemented.

[0033] The embodiments of the present application include at least the following beneficial effects:

[0034] This application can obtain geological-geophysical multidimensional data that characterizes the ancient expansion ridge construction system; determine the target characteristic data of the study area based on the geological-geophysical multidimensional data; wherein the target characteristic data include the geomorphic characteristics of the study area, the stratigraphic structure of the sequence, the development position and extension length of the fault system, the distribution of the igneous rock diapir structure and the magnetic anomaly band; build the corresponding scenes of the landform, sequence stratigraphy and fault system based on the target characteristic data, and determine the dynamic mechanism of the development process of the ancient expansion ridge, and then construct a geological model that characterizes the ancient expansion ridge construction system. The scheme of this application comprehensively considers various factors of the development of the ancient expansion ridge construction system, and by correlating the topography-sedimentary evolution-tectonic action, it can explain in detail the geodynamic mechanism of the characterization process of the ancient expansion ridge construction system, as well as the tectonic-sedimentary evolution process that is closer to the real ancient expansion ridge. This application can lay the foundation for further research on the dynamic mechanism of plate evolution and exploration of hydrothermal mineral resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic flow chart of a method for characterizing a paleo-expansion ridge construction system provided in an embodiment of the present application;

[0037] Figure 2 A reference flow chart of a method for characterizing a paleo-expansion ridge construction system provided in an embodiment of the present application;

[0038] Figure 3 The interpretation map of the ancient expansion ridge and surrounding landforms provided in the embodiment of this application;

[0039] Figure 4 The central rift fault interpretation diagram on the seismic section provided in the embodiment of the present application;

[0040] Figure 5 An interpretation diagram of an igneous rock body on a shallow stratigraphic section provided for an embodiment of the present application;

[0041] Figure 6A plan distribution diagram of the ancient expansion ridge and the surrounding structural system provided in the embodiment of the present application;

[0042] Figure 7 A schematic diagram of a geological model of an ancient expansion ridge and surrounding construction system provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the structure of a characterization device for a paleo-expansion ridge construction system provided in an embodiment of the present application;

[0044] Fig. 9 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0046] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0047] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0049] Before describing the embodiments of the present application in detail, some related technologies involved in the embodiments of the present application are first described as follows:

[0050] The construction system of the ancient spreading ridges in the ocean basin contains important evidence of seafloor expansion and the formation and evolution of the ocean basin. It is also part of the complex dynamic process of the oceanic plate. Its oceanic crust magmatic activity and hydrothermal circulation are directly related to hydrothermal mineral resources. The characterization of the construction system of the ancient spreading ridge is the basis for in-depth research on scientific innovation and resource exploration. The formation of the construction system of the ancient spreading ridge is controlled by many factors. In the context of large-scale tectonic settings, the development of sedimentary strata and the shaping of topography and geomorphology are all controlled by this, including the transformation of topography and geomorphology under the influence of tectonic action-sedimentary environment, and the filling and deformation of sedimentary strata under tectonic action. Therefore, the refined characterization of the construction system of the ancient spreading ridge is a method of integrated and comprehensive research on multiple factors such as structure, sedimentation, topography and geomorphology.

[0051] For example, mastering a large number of high-resolution seismic profiles, shallow stratigraphic profiles, magnetic and multi-beam sounding data around the paleo-expansion ridge can help us understand the construction system of the paleo-expansion ridge more clearly, effectively and accurately. Through geophysical interpretation methods, we can recognize that the geophysical field and crustal structure of the central axis rift and the north and south wings of the central axis of the paleo-expansion ridge in the research basin have quasi-symmetric characteristics, but there are differences in parameters such as extension range, strike, and slope. By interpreting the topographic and geomorphic types and distribution characteristics of the multi-beam bathymetric data of the study area, the alternating distribution of ridges, seamounts, troughs, and depression geomorphic unit types were identified on the central axis of expansion and on the north and south wings of the central axis; based on the interpretation of seismic profiles and magnetic data, the northeast-trough central fault and the northwest-trough and northeast-trough conversion faults of the nearly east-west linear structure were identified, and the ancient expansion ridge showed a discontinuous structure, which is speculated to be the result of the northeast-southwest expansion of the study basin at 56-45Ma, the north-south expansion at 45-33 / 30Ma, and the northeast-southwest seafloor rifting at 30-26Ma; seamounts and ridges are concentrated within 50km on both sides of the central rift, and this area is the most active location of igneous diapir structures. At the same time, a large number of ridges of different sizes are developed in the nearly east-west direction, which is also a direct reflection of the appearance of ridge landforms on the seabed in the dominant direction of igneous diapir structures. Focusing on the geophysical interpretation and analysis of the tectonic system of the ancient spreading ridges of the sea basin, the geological model of the ancient spreading ridges and the surrounding tectonic system was established, and the dynamic mechanism of seafloor spreading and the formation and evolution of sea basins was reasonably interpreted.

[0052] Because it costs a lot of money to obtain field data through drilling and geophysical measurements in the deep sea, the interpretation methods of the ancient spreading ridge structure system are generally based on one or a combination of the following methods, such as the interpretation of magnetic anomaly strips using globally public magnetic data, or the interpretation of geomorphic structures using multi-beam data, and the interpretation of a local measured seismic profile, extending from the local small area speculation to the characterization of sedimentary characteristics, structural characteristics, topographic and geomorphic characteristics of a large area. However, the above situation has a superficial or one-sided understanding of the ancient spreading ridge construction system, making it difficult to achieve a detailed interpretation of the ancient spreading ridge construction system.

[0053] Therefore, the embodiment of the present application provides a method, device, equipment and storage medium for characterizing the ancient expansion ridge construction system. The technical solution of the present application includes: obtaining geological-geophysical multidimensional data characterizing the ancient expansion ridge construction system; determining the target characteristic data of the study area according to the geological-geophysical multidimensional data; wherein the target characteristic data include the geomorphic characteristics of the study area, the stratigraphic structure of the sequence, the development position and extension length of the fault system, the distribution of the igneous rock diapir structure and the magnetic anomaly band; constructing the corresponding scenes of the landform, sequence stratigraphy and fault system according to the target characteristic data, and determining the dynamic mechanism of the ancient expansion ridge development process, and then constructing a geological model characterizing the ancient expansion ridge construction system. The solution of the present application comprehensively considers the various factors of the development of the ancient expansion ridge construction system, and by correlating the topography-sedimentary evolution-tectonic action, it can explain in detail the geodynamic mechanism of the characterization process of the ancient expansion ridge construction system, as well as the tectonic-sedimentary evolution process that is closer to the real ancient expansion ridge. The present application can lay the foundation for further research on the dynamic mechanism of plate evolution and exploration of hydrothermal mineral resources.

[0054] The embodiment of the present application provides a method for characterizing an ancient expansion ridge construction system, which relates to the field of data processing technology. The method for characterizing an ancient expansion ridge construction system provided in the embodiment of the present application can be applied to a terminal, can be applied to a server, or can be software running in a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, and a car terminal, etc., but is not limited to this; the server side can be configured as an independent physical server, or can be configured as a server cluster or distributed system composed of multiple physical servers, and can also be configured as a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The server can also be a node server in a blockchain network; the software can be an application that implements the method for characterizing an ancient expansion ridge construction system, etc., but is not limited to the above forms.

[0055] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0056] Reference Figure 1 The present application embodiment provides a method for characterizing an ancient expansion ridge construction system. The method may include but is not limited to S100 to S120, which are as follows:

[0057] S100: Acquire geological-geophysical multidimensional data characterizing the ancient spreading ridge construction system.

[0058] Exemplarily, this embodiment can collect geological-geophysical multidimensional data for characterizing the ancient expansion ridge construction system, including multi-beam bathymetric data, gravity data, magnetic data, seismic profiles, shallow stratigraphic profiles, and drilling data, and screen, classify, and organize the geological-geophysical multidimensional data.

[0059] S110: Determine target characteristic data of the study area based on the geological-geophysical multidimensional data; wherein the target characteristic data include the geomorphic characteristics, sequence stratigraphic structure, development position and extension length of the fault system, igneous rock diapir structure and distribution of magnetic anomaly bands of the study area.

[0060] It can be understood that the target feature data of this embodiment can characterize the landforms, strata and other characteristics of the study area, and the geological characteristics of the study area can be understood based on the target feature data.

[0061] Next, each type of data in acquiring target feature data is explained respectively.

[0062] In some optional embodiments, the step of determining the landform features according to the geological-geophysical multidimensional data includes S200 to S240:

[0063] S200: Determine seafloor topography parameters according to the multi-beam bathymetric data in the geological-geophysical multidimensional data;

[0064] S210: Dividing different types of geomorphic units according to the seabed topographic parameters;

[0065] S220: forming a landform according to the morphological characteristics and material composition of each of the landform units;

[0066] S230: Using the structural features, sedimentary features and genesis of each of the landforms to form different landform systems;

[0067] S240: Determine the spatial arrangement and combination of each of the landform systems in the study area as the landform feature.

[0068] Specifically, this embodiment can use the multi-beam bathymetric data of the study area to interpret the topographic and geomorphic features of the study area, identify the types of geomorphic units in the study area, and finely characterize the morphology and distribution range of each type of geomorphic unit.

[0069] More specifically, the types of geomorphic units are divided by seabed topographic parameters (such as altitude, isobaths, slope lines, slope, shape, etc.); each geomorphic unit is composed of specific morphological characteristics and materials, and constitutes a geomorphic body. Geomorphic bodies constitute different geomorphic systems according to their structural characteristics, sedimentary characteristics and genesis. The spatial arrangement and combination of different geomorphic systems in the study area form a regional geomorphic structure, which can reflect the structural environment characteristics of the study area.

[0070] In some optional embodiments, the step of determining the sequence stratigraphic structure according to the geological-geophysical multidimensional data includes S300 to S310:

[0071] S300: Determine the seismic reflection surface characteristics and the lithology mutation surface according to the seismic profile, shallow stratigraphic profile and drilling data in the geological-geophysical multidimensional data;

[0072] S300: Identifying sequence stratigraphic boundaries according to the seismic reflection surface characteristics and the lithologic mutation surface, and dividing sequence sequences according to the sequence stratigraphic boundaries to obtain the sequence stratigraphic structure.

[0073] Specifically, this embodiment can utilize seismic profiles, shallow stratigraphic profiles, and drilling data in the study area to identify and track sequence stratigraphic interfaces based on seismic reflection surface characteristics and lithologic mutation surfaces, and then divide sequence sequences to determine information on sequence stratigraphic development structure changes before and after basin expansion.

[0074] In some optional embodiments, the step of determining the development position and the extension length of the fracture system according to the geological-geophysical multidimensional data includes S400 to S420:

[0075] S400: Identify, based on the geological-geophysical multidimensional data, the position where the reflected wave is misaligned, the number of reflected wave common-direction axes suddenly changes, the shape of the reflected wave common-direction axes suddenly changes, the reflected wave is irregular and blank reflections appear, the reflected wave common-direction axes bifurcate, merge, twist, strong phase and strong amplitude conversion, or abnormal waves appear as misaligned positions;

[0076] S410: Identifying the fault position on the seismic profile, marking a fault point at the fault position, and connecting each of the fault points to obtain a fault line;

[0077] S420: Combining the breakpoints belonging to the same fault on each of the seismic sections on a plane according to the fault line to obtain a planar distribution map of the fault system; wherein the planar distribution map includes the development position and the extension length of the fault system.

[0078] Specifically, this embodiment can use the seismic profile of the study area to interpret the fault system, wherein the development position and extension length of the fault can be identified based on the wave resistance characteristics and structure of the reflected wave. Specific characteristic situations include the occurrence of misalignment of the reflected wave; the number of reflection wave co-direction axes suddenly increases, decreases or disappears; the shape of the reflection wave co-direction axes suddenly changes, the reflections are disordered and blank reflections appear; the reflection wave co-direction axes bifurcate, merge, twist and undergo strong phase and strong amplitude conversion, etc.; and abnormal waves appear.

[0079] On the seismic profile, the position with the above situation is identified as the fault position, and the breakpoint is marked, and then the breakpoints are connected to obtain the fault line; after the fault is interpreted on the seismic profile, the breakpoints belonging to the same fault on each seismic profile are combined on the plane to clarify the plane distribution of the fault system. It should be noted that 1) Interpretation on the profile of the fault: the development position and extension length of the fault can be identified based on the wave resistance characteristics and structure of the reflected wave. The specific characteristic situations include the dislocation of the reflected wave; the sudden increase, decrease or disappearance of the number of the same-direction axes of the reflected wave; the sudden change in the shape of the same-direction axis of the reflected wave, the reflection is disordered and blank reflection appears; the same-direction axis of the reflected wave is bifurcated, merged, twisted, and the strong phase and strong amplitude conversion occurs; abnormal waves appear, etc. All faults are explained on the seismic profile. 2) After the fault combination, the plane distribution map of the fault system is established: the fault combination is to combine the breakpoints of the same fault on each profile on the time domain seismic profile on the plane to obtain the plane distribution map of the fault system.

[0080] More specifically, S420 may further include:

[0081] According to the fault line, the breakpoints belonging to the basin-controlling level faults on each of the seismic sections are first combined on the plane, and then according to the fault line, the breakpoints of the secondary faults of the basin-controlling level faults on each of the seismic sections are combined on the plane to obtain the fracture surface, fracture attitude, breakpoint, fault distance and fracture direction of each fracture, and then obtain the plane distribution map of the fracture system; wherein, when combining the breakpoints, the change law of the formation attitude in the same fault is the same and the breakpoint combination conforms to the law of fracture mechanics properties.

[0082] It can be understood that the combination of breakpoints in this embodiment can follow the following rules: first combine the basin-controlling level faults and secondary large faults with obvious characteristics and large fault scale; the combination can be carried out from the shallow part above to the deep part below; the same fault has the same properties on parallel sections, and the fracture surface, fault attitude, breakpoint, fault distance and fault direction of the combined fault change regularly; within the same fault block, the change law of the formation attitude is the same; the breakpoint combination conforms to the laws of fracture mechanics properties.

[0083] In some optional embodiments, the step of determining the igneous rock diapir structure according to the geological-geophysical multidimensional data comprises the following steps:

[0084] According to the seismic reflection characteristics in the geological-geophysical multidimensional data, the piercing igneous body and the hidden piercing igneous body are identified, and the morphological characteristics and planar distribution of the piercing igneous body and the hidden piercing igneous body are determined as the igneous rock diapir structure.

[0085] Specifically, this embodiment can use the seismic profile of the study area to explain the development morphology and distribution of igneous rock diapir structures. According to the seismic reflection characteristics, such as the contact relationship between the igneous rock body and the surrounding rock, the morphology, internal structure, continuity and amplitude of the igneous rock body, the piercing type and hidden piercing type igneous rock bodies are identified, and the morphological characteristics and planar distribution of the igneous rock body are finely portrayed. It should be noted that the igneous rock diapir structure (i.e., the igneous rock body, which is a tectonic name) exposed on the seabed, such as seamounts, sea hills, sea ridges, sea ridges, etc. (called in topography and geomorphology), are mostly tower-shaped and cone-shaped in appearance, higher than the seabed, and the internal reflection wave resistance is poor in continuity or a messy structure. Strong and weak amplitudes may appear, and there is no stratification. The stratification of the surrounding sedimentary strata is relatively good and continuous. Due to the upwelling of igneous magma, the stratum reflection wave resistance at the contact point between the surrounding strata and the igneous rock body is tilted upward, forming a clear contact boundary with the surrounding strata, and then the overall morphological outline of the igneous rock body can be portrayed.

[0086] To further understand the geological characteristics of the study area, the embodiment of the present application may also include the following steps:

[0087] The distribution of the igneous diapir structure and the magnetic anomaly band is added to the planar distribution map of the fracture system.

[0088] Specifically, this embodiment can add the distribution of igneous diapir structures to the plane distribution map of the fault system; based on the data on the characteristics and distribution patterns of magnetic anomaly bands in the study area, the distribution of magnetic anomaly bands is added to the plane distribution map of the fault system with the igneous diapir structures added.

[0089] S120: Construct corresponding scenes of landforms, sequence stratigraphy and the fault system according to the target characteristic data, determine the dynamic mechanism of the development process of the paleo-expansion ridge, and then construct a geological model that characterizes the construction system of the paleo-expansion ridge.

[0090] Specifically, this embodiment can build corresponding scenarios of landforms, sedimentary strata, and fault systems based on the identified types and distribution of typical geomorphic units in the ancient expansion ridge study area, as well as the sequence stratigraphic structure, fault system, igneous diapir structure, and distribution of magnetic anomaly bands in the study area, analyze the dynamic mechanism of the development process of the ancient expansion ridge, and then establish a geological model of the ancient expansion ridge and the surrounding construction system, thereby realizing a characterization scheme for the construction system in the ancient expansion ridge area.

[0091] Next, the solution of the embodiment of the present application will be introduced and explained in detail with reference to specific application examples.

[0092] Reference Figure 2 , this embodiment provides a reference flow chart of a method for characterizing a paleo-expansion ridge construction system.

[0093] Specifically, this embodiment introduces an implementation case of developing an ancient expansion ridge area in the middle of a certain research basin, including the following steps:

[0094] Step 1) Collect and organize the geological and geophysical data of the spreading ridge area of ​​the study basin and establish the study area.

[0095] Step 2) Use multi-beam bathymetric data from the dilation ridge region to interpret the topographic and geomorphic features of the study area, such as Figure 3 As shown, the types of micro-geomorphological units are identified, the morphology and distribution range of the micro-geomorphological units are clarified, and the geomorphological types, morphologies and distribution ranges of the central rift zone, southern wing and northern wing of the spreading ridge are carefully depicted. Specifically, Figure 3 This is an interpretation map of the ancient expansion ridge and its surrounding landforms. According to the parameters of the seabed topography (such as altitude, isobaths, slope lines, slope, shape, etc.), the geomorphic units are divided according to the different morphological characteristics of the seabed to form geomorphic forms. These geomorphic forms constitute different geomorphic systems according to their structural characteristics, sedimentary characteristics and causes. Different geomorphic systems are spatially arranged and combined in the region to form regional topographic and geomorphic structures, which contain their tectonic evolution information.

[0096] Step 3) Using seismic profiles, shallow stratigraphic profiles, and drilling data from the study area, the sequence stratigraphic interfaces are identified based on the characteristics of seismic reflection surfaces and lithologic mutation surfaces. The sequence stratigraphic interfaces are tracked and interpreted throughout the paleo-expansion ridge area, and sequences A and B are divided to understand the changes in sequence stratigraphic structure before and after the expansion of the ocean basin.

[0097] Step 4) Use the seismic profile of the study area to interpret the fault. The location and extension length of the fault are mainly identified based on the wave impedance characteristics and structure of the reflected wave. Specific characteristics include the occurrence of reflected wave dislocation; the number of reflected wave symmetric axes suddenly increases, decreases or disappears; the shape of the reflected wave symmetric axis suddenly changes, the reflection is disordered and blank reflections appear; the reflected wave symmetric axis bifurcates, merges, twists, and strong phase and strong amplitude conversion occurs; abnormal waves appear; after the fault is interpreted on the seismic profile, the breakpoints belonging to the same fault on each profile are combined on the plane to clarify the plane distribution of the fault system and draw a plane distribution map of the fault system in the ancient expansion ridge area in the central part of the study basin. Figure 4 The interpretation map of the central rift fault on the seismic section is used to identify the location and extension length of the fault based on the reflection wave resistance characteristics and structure. The specific types include reflection wave dislocation; the number of reflection wave common axes suddenly increases, decreases or disappears; the shape of the reflection wave common axis suddenly changes, the reflection is disordered and blank reflection appears; the reflection wave common axis bifurcates, merges, twists and strong phase and strong amplitude conversion occurs; abnormal waves appear. Thus, the fault is interpreted on the seismic section.

[0098] Step 5) Use the seismic profile of the study area to interpret the development morphology and distribution of igneous diapir structures. Based on the seismic reflection characteristics, such as the contact relationship between the igneous body and the surrounding rock, the morphology, internal structure, continuity and amplitude of the igneous body, identify the piercing and hidden piercing igneous bodies, and carefully characterize their morphological characteristics and planar distribution. Add the igneous diapir structure distribution to the plane distribution map of the fault system in step 4). Figure 5 It is an interpretation map of igneous bodies on shallow stratigraphic sections. According to the seismic reflection characteristics, such as the contact boundary between the igneous body and the surrounding rock, the shape, internal structure, continuity and amplitude of the igneous body, the piercing type and hidden piercing type igneous bodies are identified, and their morphology is finely portrayed. The structural contact relationship between the igneous body and the surrounding rock strata is explained, and the fragmentation and fracture development of the surrounding rock strata caused by the development of the igneous body's uparch is explained.

[0099] Step 6) Based on the data on the characteristics and distribution patterns of the magnetic anomaly bands in the study area, they are superimposed on the plane distribution map of the fault system and igneous diapir structure established in step 5). Figure 6It is a plan distribution map of the ancient expansion ridge and the surrounding tectonic system. Based on the faults and igneous bodies identified on seismic profiles and shallow stratigraphic profiles, the position, shape, extension range, etc. of the faults and igneous bodies on the plane are determined. Then, based on the magnetic data, the types and distribution of magnetic anomaly bands in the study area and its periphery are analyzed to obtain a comprehensive plan distribution map of the ancient expansion ridge and the surrounding tectonic system.

[0100] Step 7) Using the method in step 2), identify the types, morphologies and distribution ranges of typical geomorphic units in the ancient spreading ridge study area, and use the methods in steps 3) to 5) to identify the spatial structure of the sequence stratigraphic structure, fault system, igneous diapir structure and distribution of magnetic anomaly bands in the study area. Combining the above steps, build the corresponding scene of the geomorphology and structural system, analyze the dynamic mechanism of the development process of the ancient spreading ridge, and then establish a geological model of the ancient spreading ridge and the surrounding construction system to realize the characterization scheme of the ancient spreading ridge construction system. Figure 7 This is a schematic diagram of the geological model of the ancient spreading ridge and the surrounding construction system. The scheme of this embodiment is used to identify the types and distribution of typical geomorphic units in the ancient spreading ridge study area, and to identify the fault system, igneous rock diapir structure and magnetic anomaly band distribution in the study area, build corresponding scenes of sequence stratigraphy, landform and construction system, analyze the dynamic mechanism of the development process of the ancient spreading ridge, and then establish a geological model of the ancient spreading ridge and the surrounding construction system.

[0101] Beneficial effects of this embodiment:

[0102] Provide a method based on the integration of multi-dimensional data to characterize the characteristics of the ancient expansion ridge construction system. Under the unified geological science framework, it integrates multiple disciplines such as topography and geomorphology-tectonics-sedimentology-sequence stratigraphy, interprets the idea of ​​topography and geomorphology-sequence stratigraphy-fault system-igneous rock diapir structure-magnetic anomaly band-geological model, builds corresponding scenes of sequence stratigraphy, landform and structural system, analyzes the dynamic mechanism of the development process of the ancient expansion ridge, and establishes a geological model of the ancient expansion ridge and the surrounding construction system. This embodiment has clear levels, progressive levels, and gradual deepening. It has the characteristics of rigorous logical scientific thinking methods, and can be gradually expanded, improved, and updated as data is enriched and technology advances.

[0103] Reference Figure 8 The embodiment of the present application also provides a characterization device for an ancient expansion ridge construction system, which can implement the characterization method of the ancient expansion ridge construction system described above, and the device includes:

[0104] A data acquisition unit for acquiring geological-geophysical multidimensional data characterizing the paleo-spreading ridge construction system;

[0105] A feature acquisition unit, used to determine target feature data of the study area according to the geological-geophysical multidimensional data; wherein the target feature data includes the geomorphic features, sequence stratigraphic structure, development position and extension length of the fault system, igneous rock diapir structure and distribution of magnetic anomaly bands of the study area;

[0106] The model characterization unit is used to build corresponding scenes of landforms, sequence stratigraphy and the fault system according to the target characteristic data, and determine the dynamic mechanism of the development process of the ancient spreading ridge, so as to construct a geological model that characterizes the construction system of the ancient spreading ridge.

[0107] It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0108] The embodiment of the present application also provides an electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the above-mentioned method for characterizing the ancient expansion ridge construction system when executing the computer program. The electronic device can be any smart terminal including a tablet computer, a car computer, etc.

[0109] It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0110] See also Fig. 9 , Fig. 9 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0111] The processor 901 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0112] The memory 902 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device or a random access memory (RAM). The memory 902 can store an operating system and other application programs. When the technical solution provided in the embodiments of this specification is implemented by software or firmware, the relevant program code is stored in the memory 902, and the processor 901 calls and executes the characterization method of the ancient expansion ridge construction system of the embodiment of this application;

[0113] Input / output interface 903, used to implement information input and output;

[0114] Communication interface 904, used to realize communication interaction between the device and other devices, which can be realized by wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WIFI, Bluetooth, etc.);

[0115] A bus 905 that transmits information between various components of the device (e.g., the processor 901, the memory 902, the input / output interface 903, and the communication interface 904);

[0116] The processor 901 , the memory 902 , the input / output interface 903 and the communication interface 904 are connected to each other in communication within the device via a bus 905 .

[0117] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the characterization method of the above-mentioned ancient expansion ridge construction system.

[0118] It can be understood that the contents of the above method embodiments are all applicable to the present storage medium embodiments, the functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0119] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0120] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0121] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0122] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0123] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0124] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0125] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0126] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0127] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0128] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0129] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0130] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A method for characterizing a paleo-expansion ridge construction system, characterized in that: The method comprises the following steps: Acquire geological-geophysical multidimensional data characterizing the paleo-spreading ridge construction system; Determine target characteristic data of the study area according to the geological-geophysical multidimensional data; wherein the target characteristic data include geomorphic features, sequence stratigraphic structure, development location and extension length of fault system, igneous rock diapir structure and distribution of magnetic anomaly bands of the study area; According to the target characteristic data, the corresponding scenes of landform, sequence stratigraphy and the fault system are constructed, and the dynamic mechanism of the development process of the ancient spreading ridge is determined, so as to construct a geological model characterizing the construction system of the ancient spreading ridge.

2. A method for characterizing a paleo-expansion ridge construction system according to claim 1, characterized in that: The step of determining the landform features according to the geological-geophysical multidimensional data comprises the following steps: Determine seafloor topography parameters based on multi-beam bathymetric data in the geological-geophysical multidimensional data; Dividing different types of geomorphic units according to the seabed topographic parameters; The landform is formed according to the morphological characteristics and material composition of each of the landform units; Different geomorphic systems are formed by utilizing the structural features, sedimentary features and genesis of each of the geomorphic forms; The spatial arrangement and combination of each of the landform systems in the study area is determined as the landform feature.

3. The method for characterizing a paleo-expansion ridge construction system according to claim 1, characterized in that: The step of determining the sequence stratigraphic structure according to the geological-geophysical multidimensional data comprises the following steps: Determine the seismic reflection surface characteristics and lithology mutation surface according to the seismic profile, shallow stratigraphic profile and drilling data in the geological-geophysical multidimensional data; The sequence stratigraphic interface is identified according to the seismic reflection surface characteristics and the lithology mutation surface, and the sequence sequence is divided according to the sequence stratigraphic interface to obtain the sequence stratigraphic structure.

4. The method for characterizing a paleo-expansion ridge construction system according to claim 1, characterized in that: The step of determining the development position and the extension length of the fracture system according to the geological-geophysical multidimensional data comprises the following steps: According to the geological-geophysical multidimensional data, the position where the reflected wave is misaligned, the number of reflected wave common-direction axes suddenly changes, the shape of the reflected wave common-direction axes suddenly changes, the reflected wave is irregular and blank reflection occurs, the reflected wave common-direction axes bifurcate, merge, twist, strong phase and strong amplitude conversion occurs, or abnormal waves appear is identified as the misaligned position; Identify the fault position on the seismic section, mark the fault point at the fault position, and connect the fault points to obtain a fault line; The breakpoints belonging to the same fault on each of the seismic sections are combined on a plane according to the fault line to obtain a planar distribution map of the fault system; wherein the planar distribution map includes the development position and the extension length of the fault system.

5. The method for characterizing a paleo-expansion ridge construction system according to claim 4, characterized in that: The step of combining the breakpoints belonging to the same fault on each of the seismic sections on a plane according to the fault line to obtain a plane distribution diagram of the fault system comprises the following steps: According to the fault line, the breakpoints belonging to the basin-controlling level faults on each of the seismic sections are first combined on the plane, and then according to the fault line, the breakpoints of the secondary faults of the basin-controlling level faults on each of the seismic sections are combined on the plane to obtain the fracture surface, fracture attitude, breakpoint, fault distance and fracture direction of each fracture, and then obtain the plane distribution map of the fracture system; wherein, when combining the breakpoints, the change law of the formation attitude in the same fault is the same and the breakpoint combination conforms to the law of fracture mechanics properties.

6. The method for characterizing a paleo-expansion ridge construction system according to claim 4, characterized in that: The step of determining the igneous rock diapir structure according to the geological-geophysical multidimensional data comprises the following steps: According to the seismic reflection characteristics in the geological-geophysical multidimensional data, the piercing igneous body and the hidden piercing igneous body are identified, and the morphological characteristics and planar distribution of the piercing igneous body and the hidden piercing igneous body are determined as the igneous rock diapir structure.

7. A method for characterizing a paleo-expansion ridge construction system according to claim 6, characterized in that: The method further comprises the following steps: The distribution of the igneous diapir structure and the magnetic anomaly band is added to the planar distribution map of the fracture system.

8. A characterization device for a paleo-expansion ridge construction system, characterized in that: The device comprises: A data acquisition unit for acquiring geological-geophysical multidimensional data characterizing the paleo-spreading ridge construction system; A feature acquisition unit, used to determine target feature data of the study area according to the geological-geophysical multidimensional data; wherein the target feature data includes the geomorphic features, sequence stratigraphic structure, development position and extension length of the fault system, igneous rock diapir structure and distribution of magnetic anomaly bands of the study area; The model characterization unit is used to build corresponding scenes of landforms, sequence stratigraphy and the fault system according to the target characteristic data, and determine the dynamic mechanism of the development process of the ancient spreading ridge, so as to construct a geological model that characterizes the construction system of the ancient spreading ridge.

9. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements a method for characterizing a paleo-expansion ridge construction system as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, it implements a method for characterizing a paleo-expansion ridge construction system as described in any one of claims 1 to 7.

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