CN111948703A - Seismic exploration method and device excited by mixed seismic source - Google Patents
Seismic exploration method and device excited by mixed seismic source Download PDFInfo
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- CN111948703A CN111948703A CN201910413366.4A CN201910413366A CN111948703A CN 111948703 A CN111948703 A CN 111948703A CN 201910413366 A CN201910413366 A CN 201910413366A CN 111948703 A CN111948703 A CN 111948703A
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a seismic exploration method and a device excited by a mixed seismic source, wherein the method comprises the following steps: dividing a work area to be explored into a plurality of sub-areas, enabling each sub-area to correspond to a seismic source of a seismic source type, wherein the seismic source type comprises the following steps: a pulsed seismic source and a vibroseis; adding the seismic sources corresponding to all sub-areas of a work area to be explored into an excitation queue; determining the excitation time interval between the seismic sources in the excitation queue according to the seismic source types of two adjacent seismic sources in the excitation queue; and controlling each seismic source in the excitation queue to be excited according to the excitation time interval. The invention can realize the excitation of different types of seismic sources in the same area, and greatly improves the field production efficiency.
Description
Technical Field
The invention relates to the field of seismic exploration, in particular to a seismic exploration method and device excited by a mixed seismic source.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The excitation source for seismic exploration mainly comprises an explosive source, a controllable source and a gas gun source. The primary stimulus employed in early seismic exploration was explosives. In recent years, due to the importance on safety and environmental protection, vibroseis and air gun seismic sources are more and more widely applied. The construction steps of the explosive source are as follows: firstly, the explosive is embedded in a preset shot point position and then is excited, the detector receives and records response data of a period of time, the period of time is a recording length, and the record is a seismic record excited by an explosive source. The use of a vibroseis comprises the following steps: firstly, one or more seismic sources are stopped at a shot point position, then the controllable seismic sources are driven by using a scanning signal, the scanning signal is a signal with frequency changing along with time, a detector receives and records response data of a period of time, the period of time is equal to the scanning time plus the listening time, and finally, the recorded data are cross-correlated by using a reference signal to obtain seismic records.
With the development of a broadband, wide azimuth and high density (for short, "two widths and one height") seismic acquisition technology, how to improve the acquisition efficiency becomes a bottleneck restricting the development of the technology. The aliasing acquisition technology is generated under the background, is mainly used in onshore vibroseis exploration and offshore air gun seismic exploration, and is still in a blank stage in the current mixed source excitation of an explosive seismic source and a vibroseis as well as an air gun seismic source and a vibroseis.
In seismic exploration, the excitation source used in a work area is typically a single, either explosive, vibroseis, or air-gun source. With the sophistication of exploration areas, a single excitation source has not been able to meet the needs of exploration, and the simultaneous application of multiple excitation sources has become increasingly popular. For example, in complex mountain front zones or areas with steep terrain, explosive sources are often used for excitation, and in areas with flat terrain, vibroseis sources are used for excitation. In a mixed source excitation area, areas of different excitation sources are different and sometimes even staggered, so that when the excitation sources of different types are excited, an instrument recording system needs to be switched back and forth, construction time is wasted, and production efficiency is influenced.
Disclosure of Invention
The embodiment of the invention provides a seismic exploration method excited by a mixed seismic source, which is used for solving the technical problem of low construction efficiency of the existing seismic exploration method excited by the mixed seismic source, and comprises the following steps: dividing a work area to be explored into a plurality of sub-areas, enabling each sub-area to correspond to a seismic source of a seismic source type, wherein the seismic source type comprises the following steps: a pulsed seismic source and a vibroseis; adding the seismic sources corresponding to all sub-areas of a work area to be explored into an excitation queue; determining the excitation time interval between the seismic sources in the excitation queue according to the seismic source types of two adjacent seismic sources in the excitation queue; and controlling each seismic source in the excitation queue to be excited according to the excitation time interval.
The embodiment of the invention also provides a seismic exploration device excited by a mixed seismic source, which is used for solving the technical problem of low construction efficiency of the existing seismic exploration method excited by the mixed seismic source, and comprises the following steps: the work area dividing module is used for dividing a work area to be explored into a plurality of sub-areas, and each sub-area corresponds to a seismic source of a seismic source type, wherein the seismic source type comprises: a pulsed seismic source and a vibroseis; the excitation queue module is used for adding the seismic sources corresponding to all the sub-areas of the work area to be explored into one excitation queue; the excitation time interval determining module is used for determining the excitation time interval between the seismic sources in the excitation queue according to the seismic source types of two adjacent seismic sources in the excitation queue; and the excitation control module is used for controlling each seismic source in the excitation queue to be excited according to the excitation time interval.
The embodiment of the invention also provides computer equipment for solving the technical problem of low construction efficiency of the existing seismic exploration method excited by the mixed seismic source.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problem of low construction efficiency of the existing seismic exploration method excited by the hybrid seismic source, and the computer readable storage medium stores a computer program for executing the seismic exploration method excited by the hybrid seismic source.
In the embodiment of the invention, a work area to be explored is divided into a plurality of sub-areas, each sub-area corresponds to a seismic source of one seismic source type, the seismic sources corresponding to all the sub-areas of the work area to be explored are added into one excitation queue, the excitation time interval between the seismic sources in the excitation queue is determined according to the seismic source types of two adjacent seismic sources in the excitation queue, and then the seismic sources in the excitation queue are controlled to be excited according to the determined excitation time interval.
According to the embodiment of the invention, the control system is used for controlling and restraining the excitation time of the seismic sources of different types, so that the seismic sources of different types in the same area can be excited, and the field production efficiency is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a flow chart of a method of seismic exploration with hybrid source excitation according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a work area division provided in an embodiment of the present invention;
FIG. 3 is a flow chart of a method for designing a hybrid seismic source firing interval provided in an embodiment of the present invention;
FIG. 4 is a schematic illustration of a seismic data recording with hybrid source excitation provided in an embodiment of the invention;
FIG. 5 is a schematic illustration of a record of separated vibroseis-excited seismic data before correlation, as provided in an embodiment of the invention;
fig. 6 is a schematic diagram of a record of seismic data excited by a vibroseis obtained by separation after correlation according to an embodiment of the present invention;
FIG. 7 is a schematic illustration of a seismic data record of a separately acquired well shot data shot provided in an embodiment of the present invention;
fig. 8 is a schematic diagram of a hybrid source excitation seismic surveying apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In the description of the present specification, the terms "comprising," "including," "having," "containing," and the like are used in an open-ended fashion, i.e., to mean including, but not limited to. Reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in the embodiments is for illustrative purposes to illustrate the implementation of the present application, and the sequence of steps is not limited and can be adjusted as needed.
The embodiment of the invention provides a seismic exploration method excited by a mixed seismic source, fig. 1 is a flow chart of the seismic exploration method excited by the mixed seismic source, as shown in fig. 1, the method comprises the following steps:
s101, dividing a work area to be explored into a plurality of sub-areas, enabling each sub-area to correspond to a seismic source of a seismic source type, wherein the seismic source type comprises: a pulsed source and a vibroseis.
It should be noted that the work area to be surveyed may be any construction area to be subjected to seismic exploration, and may be a land area, a sea or river area, or a mixed area of land and sea; for land areas with flat topography, a vibroseis can be used as an excitation source for seismic exploration; for land areas with complex topography, explosive seismic sources can be used as excitation sources for seismic exploration; for marine or river areas, air gun seismic sources may be used as excitation sources for seismic exploration. Therefore, the seismic exploration method with mixed seismic source excitation provided by the embodiment of the invention can be applied to, but is not limited to, a seismic exploration area with any one or more of a controllable seismic source, a explosive seismic source and an air gun seismic source in any combination as an excitation source.
The explosive source and the air gun source both belong to pulse signals with short and narrow duration, and the controllable source is a continuous vibration signal with long duration; therefore, when the hybrid seismic source excitation is performed on the area to be explored, the area to be explored is divided according to the topographic features to obtain a plurality of sub-areas, and each sub-area corresponds to one pulse seismic source or controllable seismic source. For example, as shown in fig. 2, the work area provided in the embodiment of the present invention is divided into two sub-areas, where the slant line area corresponds to the shot firing (i.e., the explosive source firing), and the blank area corresponds to the vibroseis firing.
S102, adding the seismic sources corresponding to all the sub-areas of the work area to be explored into one excitation queue.
Because the work area to be explored comprises the sub-areas which are excited by using various seismic sources, in order to prevent the excitation sources of the sub-areas from being staggered when excited, the seismic sources of all the sub-areas of the work area to be explored can be added into one excitation queue, and the control of the seismic sources of all the sub-areas can be realized by setting the excitation time of all the seismic sources in the excitation queue.
Alternatively, after the area to be surveyed is divided into regions, the sub-regions corresponding to the same type of seismic source (excitation source) after division may be identified (e.g., marked or numbered) to distinguish seismic sources of different seismic source types.
And S103, determining the excitation time interval between the seismic sources in the excitation queue according to the seismic source types of the two adjacent seismic sources in the excitation queue.
After a work area to be explored is divided into a plurality of sub-areas, the excitation time intervals among the seismic sources are designed according to the type of the seismic source adopted by each sub-area, so that the seismic sources of different seismic source types correspond to different excitation time intervals, and the seismic sources in the excitation queue are controlled to be excited according to the designed excitation time intervals.
As an alternative embodiment, determining the firing interval between two adjacent sources according to the source type of the two adjacent sources may include any one of:
if the seismic source types of two adjacent seismic sources are both pulse seismic sources, the excitation time interval between the two adjacent seismic sources is the sum of the listening time and the energy decay time (for example, when the listening time of a pulse seismic source signal is 6s and the energy decay time is 5s, the excitation time interval of two adjacent pulse seismic source signals is 11 s);
if the seismic source types of two adjacent seismic sources are both vibroseis, the excitation time interval between the two adjacent seismic sources is more than one listening time and less than the scanning time of one vibroseis (specifically, the arrangement can be carried out in a sliding scanning or dynamic scanning mode);
and if the seismic source type of one seismic source in two adjacent seismic sources is a pulse seismic source and the seismic source type of the other seismic source is a controllable seismic source, the excitation time interval between two adjacent seismic sources is greater than or equal to the sum of one listening time and the scanning time of one controllable seismic source.
It should be noted that if the seismic source types of two adjacent seismic sources are controllable seismic sources, it is only necessary that the excitation time interval is greater than or equal to one scanning time.
By setting the excitation time intervals of the individual seismic sources in the excitation queue according to the above-described embodiment, the individual seismic sources in the excitation queue may not be staggered when excited.
And S104, controlling each seismic source in the excitation queue to be excited according to the excitation time interval.
And after the excitation time interval between the seismic sources in the excitation queue is determined, controlling the seismic sources in the excitation queue to be excited according to the determined excitation time interval.
As can be seen from the above, in the seismic exploration method excited by hybrid seismic sources provided in the embodiment of the present invention, the work area to be explored is divided into a plurality of sub-areas, each sub-area corresponds to a seismic source of one seismic source type, the seismic sources corresponding to all the sub-areas of the work area to be explored are added into one excitation queue, the excitation time interval between the seismic sources in the excitation queue is determined according to the seismic source types of two adjacent seismic sources in the excitation queue, and then each seismic source in the excitation queue is controlled to be excited according to the determined excitation time interval.
According to the embodiment of the invention, the control system is used for controlling and restraining the excitation time of the seismic sources of different types, so that the seismic sources of different types in the same area can be excited, and the field production efficiency is greatly improved.
Because each seismic source in the excitation queue is excited according to the preset excitation time interval, only continuous acquisition is needed when seismic data acquisition is carried out. For the data excited by the mixed source, because a continuous recording mode is adopted, the continuously acquired data needs to be separated to obtain the seismic data corresponding to different seismic sources. Therefore, in an alternative embodiment, the seismic exploration method with mixed source excitation provided by the embodiment of the invention may further include the following steps: continuously acquiring seismic data excited by each seismic source in a preset time period; and separating the seismic data in the preset time period based on the type of the seismic source of each seismic source to obtain the seismic data corresponding to each seismic source.
Optionally, in the time period of the seismic source operation, the seismic data acquisition instrument automatically forms a file for storing data which is continuously acquired every preset time period (for example, 15s) until the blasting is finished, and the instrument stops acquiring recorded data.
It should be noted that the data separation of impulsive source (i.e., well gun or air gun source) excitation from vibroseis excitation is different. Therefore, as an alternative implementation, when the seismic data in the preset time period are subjected to separation processing based on the type of the seismic source of each seismic source to obtain the seismic data corresponding to each seismic source, any one of the following may be included: if the type of the seismic source to be separated is a pulse seismic source, separating seismic data with a first time length from the seismic data in a preset time period to serve as the seismic data of the seismic source to be separated, wherein the first time length is one listening time; and if the seismic source type of the seismic source to be separated is a controllable seismic source, separating seismic data with a second time length from the seismic data in the preset time period as the seismic data of the seismic source to be separated, wherein the second time length is the sum of one listening time and one scanning time.
For vibroseis data records, the firing time of the vibroseis (e.g., GPS time of firing) is used to cut the uncorrelated records from the continuously recorded data by a time length T, the predetermined time length T being shown in equation (1):
T＝Ts+T1 (1)
wherein, TsRepresents the scan time; t is1Indicating the listening time.
Correlating the scanning signal of the controllable seismic source with the uncorrelated seismic data to obtain correlated seismic records, wherein the scanning signal of the controllable seismic source can be represented by formula (2):
wherein s is1(t) represents a vibroseis sweep signal; a (t) represents the signal amplitude; f. oflRepresenting a scanning signal starting frequency; f. ofuRepresents the scanning signal termination frequency; t issRepresents the scan time; t represents time.
For impulsive sources (well and air gun sources), the GPS time by firing is determined by the duration T from the continuously recorded seismic records1And cutting to form a single shot record.
As a preferred implementation manner, taking the work area shown in fig. 2 as an example, the seismic exploration method with hybrid source excitation provided by the embodiment of the present invention may specifically include the following steps:
the method includes the steps that firstly, a work area is divided according to the topographic features of the construction area, and a plurality of sub-areas are obtained, wherein each sub-area corresponds to seismic sources of different seismic source types. In fig. 2, the hatched areas correspond to borehole excitation, and the blank areas correspond to vibroseis excitation.
And secondly, counting the number of the seismic sources used in the work area and designing the time intervals for exciting different seismic sources, wherein 4 groups of controlled seismic sources are constructed in the work area, and 8 explosive machines are excited by the well gun, so that the total number of excitation sources in the work area is 12. And after the total number of the excitation sources in the work area is counted, designing the excitation time intervals of different excitation sources.
Fig. 3 is a flow chart of a method for designing a hybrid seismic source excitation time interval according to an embodiment of the present invention. The scanning time of a scanning signal is assumed to be 20s and the listening time is assumed to be 6s when the vibroseis is constructed, and the listening time of a pulse vibroseis is assumed to be 6s and the energy attenuation time is assumed to be 6 s; as shown in fig. 3, when the excitation sources of two adjacent guns are controllable seismic sources, the setting is performed according to sliding scanning, and the excitation time interval of two adjacent controllable seismic sources can be set to 11s (greater than one listening time 6s and less than one scanning time 20 s); when the excitation sources of two adjacent guns are well guns, the excitation time interval of the two adjacent well guns can be set to be 12s (listening time 6s + energy decay time 6 s); when the excitation sources of two adjacent guns are a vibroseis and a well gun, the time interval of the two guns is set to be 26s (the scanning time is 20s + the listening time is 6 s).
After setting the excitation time interval of different types of excitation sources, arranging all the seismic sources into a queue (namely an excitation queue) of the control system to wait for excitation. When waiting for excitation, the control system judges the types of the excitation sources of the front cannon and the rear cannon, then the excitation is carried out according to the time interval designed in advance, and after the excitation is finished, the control system automatically selects one excitation source for excitation. During hybrid excitation, data recording is carried out in a continuous recording mode, and continuously acquired data are separated in subsequent processing. FIG. 4 is a schematic illustration of seismic data recording with hybrid source excitation provided in an embodiment of the invention.
And fourthly, separating the vibroseis records, and cutting out the unrelated vibroseis records from the original mixed record through the GPS time of the firing of the vibroseis. The length of the vibroseis scanning signal is 16s, the listening time is 6s, and the length of the cut unrelated vibroseis record is 22 s. Fig. 5 is a schematic diagram of a seismic data record associated with a front vibroseis excitation according to an embodiment of the present invention. After obtaining the original uncorrelated vibroseis records, correlating the sweep signals with the uncorrelated records to obtain correlated records, as shown in fig. 6, the seismic data records excited by the correlated vibroseis provided in the embodiment of the present invention.
Separating the well shot records, cutting the well shot earthquake records from the original mixed records through the GPS time excited by the well shots, wherein the listening time is 6s, so that the length of the cut well shot records is 6s, and the well shot records are shown in figure 7 after separation.
According to the method and the device, the construction work area is divided into areas, so that different areas correspond to excitation sources of different seismic source types, corresponding excitation time intervals are designed according to the seismic source types of the different areas, the seismic sources of the different seismic source types correspond to the different excitation time intervals, the seismic sources are controlled to be excited according to the designed excitation time intervals, and after the seismic data acquisition instrument acquires and records data excited by the seismic sources in a continuous recording mode, the acquired data are cut and separated according to the preset length through the GPS time for blasting of the excitation sources, so that the final single-shot seismic data record is formed.
Embodiments of the invention also provide a hybrid source excitation seismic prospecting device, as described in the following embodiments. Because the problem solving principle of the embodiment of the device is similar to the seismic exploration method of mixed seismic source excitation, the implementation of the embodiment of the device can be referred to the implementation of the method, and repeated details are not repeated.
Fig. 8 is a schematic diagram of a hybrid source excitation seismic survey apparatus according to an embodiment of the invention, as shown in fig. 8, the apparatus including: a work area division module 81, a fire queue module 82, a fire interval determination module 83, and a fire control module 84.
The work area dividing module 81 is configured to divide a work area to be explored into a plurality of sub-areas, so that each sub-area corresponds to a seismic source of a seismic source type, where the seismic source type includes: a pulsed seismic source and a vibroseis; the excitation queue module 82 is used for adding the seismic sources corresponding to all the sub-areas of the work area to be explored into one excitation queue; the excitation time interval determining module 83 is configured to determine an excitation time interval between the seismic sources in the excitation queue according to the seismic source types of two adjacent seismic sources in the excitation queue; and the excitation control module 84 is used for controlling each seismic source in the excitation queue to be excited according to the excitation time interval.
As can be seen from the above, in the seismic exploration device excited by hybrid seismic sources provided in the embodiment of the present invention, the work area to be explored is divided into a plurality of sub-areas by the work area dividing module 81, each sub-area corresponds to a seismic source of one seismic source type, the seismic sources corresponding to all the sub-areas of the work area to be explored are added into one excitation queue by the excitation queue module 82, the excitation time interval between the seismic sources in the excitation queue is determined by the excitation time interval determining module 83 according to the seismic source types of two adjacent seismic sources in the excitation queue, and then each seismic source in the excitation queue is controlled to be excited by the excitation control module 84 according to the determined excitation time interval.
According to the embodiment of the invention, the control system is used for controlling and restraining the excitation time of the seismic sources of different types, so that the seismic sources of different types in the same area can be excited, and the field production efficiency is greatly improved.
In an alternative embodiment, in the seismic exploration apparatus with mixed source excitation provided by the embodiment of the present invention, the excitation time interval determination module 83 may specifically include any one of the following: the first sub-determination module is used for determining whether the seismic source types of two adjacent seismic sources are pulse seismic sources or not, wherein the excitation time interval between the two adjacent seismic sources is the sum of one listening time and one energy attenuation time; the second sub-determination module is used for determining whether the seismic source types of two adjacent seismic sources are controllable seismic sources or not, wherein the excitation time interval between the two adjacent seismic sources is greater than one listening time and less than the scanning time of one controllable seismic source; and the third sub-determination module is used for determining whether the seismic source type of one seismic source in two adjacent seismic sources is a pulse seismic source or a vibroseis, and determining whether the seismic source type of the other seismic source is a vibroseis or not according to the determined seismic source type.
In an alternative embodiment, the hybrid seismic source excitation seismic exploration apparatus provided in the embodiment of the present invention may further include: the mixed seismic source excitation data acquisition module is used for continuously acquiring seismic data excited by each seismic source in a preset time period; and the mixed seismic source excitation data separation module is used for separating the seismic data in the preset time period based on the type of the seismic source of each seismic source to obtain the seismic data corresponding to each seismic source.
Optionally, based on the above embodiment, as an optional implementation manner, the hybrid source excitation data separation module may specifically include any one of the following: the first sub-separation module is used for separating seismic data with a first time length from the seismic data in a preset time period as the seismic data of the seismic source to be separated if the type of the seismic source to be separated is a pulse seismic source, wherein the first time length is one listening time; and the second sub-separation module is used for separating seismic data with a second time length from the seismic data in the preset time period as the seismic data of the seismic source to be separated if the seismic source type of the seismic source to be separated is a vibroseis, wherein the second time length is the sum of one listening time and one scanning time.
The embodiment of the invention also provides computer equipment for solving the technical problem of low construction efficiency of the existing seismic exploration method excited by the mixed seismic source.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problem of low construction efficiency of the existing seismic exploration method excited by the hybrid seismic source, and the computer readable storage medium stores a computer program for executing the seismic exploration method excited by the hybrid seismic source.
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 above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of seismic exploration with hybrid source excitation, comprising:
dividing a work area to be explored into a plurality of sub-areas, enabling each sub-area to correspond to a seismic source of a seismic source type, wherein the seismic source type comprises the following steps: a pulsed seismic source and a vibroseis;
adding the seismic sources corresponding to all the sub-areas of the work area to be explored into an excitation queue;
determining the excitation time interval between the seismic sources in the excitation queue according to the seismic source types of two adjacent seismic sources in the excitation queue;
and controlling each seismic source in the excitation queue to be excited according to the excitation time interval.
2. The method of claim 1, wherein determining the firing intervals between the seismic sources in the firing queue based on the source types of two adjacent seismic sources in the firing queue comprises:
if the types of the seismic sources of two adjacent seismic sources are pulse seismic sources, the excitation time interval between the two adjacent seismic sources is the sum of one listening time and one energy attenuation time;
if the seismic source types of two adjacent seismic sources are both vibroseis, the excitation time interval between the two adjacent seismic sources is more than one listening time and less than the scanning time of one vibroseis;
and if the seismic source type of one seismic source in two adjacent seismic sources is a pulse seismic source and the seismic source type of the other seismic source is a vibroseis, the excitation time interval between the two adjacent seismic sources is greater than or equal to the sum of one listening time and the scanning time of one vibroseis.
3. The method of claim 1, wherein after controlling each seismic source in the firing queue to fire, the method further comprises:
continuously acquiring seismic data excited by each seismic source in a preset time period;
and separating the seismic data in the preset time period based on the type of the seismic source of each seismic source to obtain the seismic data corresponding to each seismic source.
4. The method of claim 3, wherein the separating the seismic data in the preset time period based on the source type of each seismic source to obtain the seismic data corresponding to each seismic source comprises:
if the type of the seismic source to be separated is a pulse seismic source, separating seismic data with a first time length from the seismic data in the preset time period as the seismic data of the seismic source to be separated, wherein the first time length is one listening time;
and if the seismic source type of the seismic source to be separated is a controllable seismic source, separating seismic data with a second time length from the seismic data in the preset time period as the seismic data of the seismic source to be separated, wherein the second time length is the sum of one listening time and one scanning time.
5. A hybrid source excitation seismic exploration apparatus, comprising:
the work area dividing module is used for dividing a work area to be explored into a plurality of sub-areas, so that each sub-area corresponds to a seismic source of a seismic source type, wherein the seismic source type comprises: a pulsed seismic source and a vibroseis;
the excitation queue module is used for adding the seismic sources corresponding to all the sub-areas of the work area to be explored into one excitation queue;
the excitation time interval determining module is used for determining the excitation time interval between the seismic sources in the excitation queue according to the seismic source types of two adjacent seismic sources in the excitation queue;
and the excitation control module is used for controlling each seismic source in the excitation queue to be excited according to the excitation time interval.
6. The apparatus of claim 5, wherein the firing interval determining module comprises:
the first sub-determination module is used for determining whether the seismic source types of two adjacent seismic sources are pulse seismic sources or not, wherein the excitation time interval between the two adjacent seismic sources is the sum of one listening time and one energy attenuation time;
the second sub-determination module is used for determining whether the seismic source types of two adjacent seismic sources are controllable seismic sources or not, wherein the excitation time interval between the two adjacent seismic sources is greater than one listening time and less than the scanning time of one controllable seismic source;
and the third sub-determination module is used for determining whether the seismic source type of one seismic source in two adjacent seismic sources is a pulse seismic source or a vibroseis, and determining whether the seismic source type of the other seismic source is a vibroseis or not according to the determined seismic source type.
7. The apparatus of claim 5, wherein the apparatus further comprises:
the mixed seismic source excitation data acquisition module is used for continuously acquiring seismic data excited by each seismic source in a preset time period;
and the mixed seismic source excitation data separation module is used for separating the seismic data in the preset time period based on the type of each seismic source to obtain the seismic data corresponding to each seismic source.
8. The apparatus of claim 7, wherein the hybrid source excitation data separation module comprises:
the first sub-separation module is used for separating seismic data with a first time length from the seismic data in the preset time period as the seismic data of the seismic source to be separated if the type of the seismic source to be separated is a pulse seismic source, wherein the first time length is one listening time;
and the second sub-separation module is used for separating seismic data with a second time length from the seismic data in the preset time period as the seismic data of the seismic source to be separated if the seismic source type of the seismic source to be separated is a vibroseis, wherein the second time length is the sum of one listening time and one scanning time.
9. A computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program implements a method of seismic surveying with hybrid source excitation according to any of claims 1 to 4.
10. A computer-readable storage medium storing a computer program for executing the method for seismic surveying with blended source excitations according to any one of claims 1 to 4.
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