Double-seismic-source excitation shot point position correction method and device, electronic equipment and seismic source ship

Abstract

The invention provides a double-seismic-source excitation shot point position correction method and device, electronic equipment and a seismic source ship, the double-seismic-source excitation shot point position correction method is arranged on the seismic source ship, the seismic source ship can excite double seismic sources, and the double-seismic-source excitation shot point position correction method comprises the steps that when the seismic source ship excites the double seismic sources at the current moment, the distance between the double seismic sources is determined; acquiring a theoretical measuring line direction as a first direction; in the theoretical measuring line direction, determining a rear seismic source in the double seismic sources as a first seismic source, and determining a front seismic source in the double seismic sources as a second seismic source; determining the direction of the first seismic source pointing to the second seismic source as a second direction; calculating an included angle between the first direction and the second direction; based on the distance between the first seismic source and the second seismic source and the included angle between the first direction and the second direction, the offset compensation amount of the excitation shot point distance of the first seismic source and the second seismic source is determined; and correcting the next excitation shot point positions of the first seismic source and the second seismic source based on the offset compensation amount.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic exploration, and in particular, to a method and device for correcting the position of shot points in dual-source excitation, an electronic device, and a seismic source vessel. Background Art

[0002] With the continuous development and application of oil seismic exploration technologies such as the two-wide and one-high (wide azimuth, wide frequency, high density) technology and high-efficiency seismic source acquisition technology, geophysical exploration has shifted towards small bin, large number of traces, large area, and high-efficiency directions. It has become normal for seismic source vessels in marine seismic exploration to be equipped with two air gun arrays. Due to factors such as sea conditions, ocean currents, and wind, marine seismic exploration vessel navigation has characteristics such as dynamics, real-time, and non-repeatability. When sea conditions and ocean currents are complex, the longitudinal offset of dual-source excitation is too large, that is, the centers of the two air gun arrays are not in the same position along the direction of the theoretical survey line, resulting in problems such as poor imaging effect of seismic data and uneven coverage.

[0003] Regarding the single-vessel dual-source longitudinal offset control technology, there are two commonly used solutions in the industry. One is to use an external mechanical device to perform real-time fine-tuning of the array for retraction and extension. This solution has the risk of retracting and extending high-pressure gas pipes on the premise of adding additional mechanical devices. The other is to use a commercial integrated navigation system to solve this problem, but different methods are used to achieve longitudinal offset correction, and the effects are not good. The longitudinal offset value cannot be guaranteed to be less than 5 meters in any shot interval. Summary of the Invention

[0004] The first aspect of the present invention provides a method for correcting the position of shot points in dual-source excitation.

[0005] The second aspect of the present invention provides a device for correcting the position of shot points in dual-source excitation.

[0006] The third aspect of the present invention provides an electronic device.

[0007] The fourth aspect of the present invention provides a readable storage medium.

[0008] The fifth aspect of the present invention provides a seismic source vessel.

[0009] Specifically, the present invention is implemented through the following technical solutions:

[0010] The technical solution of the first aspect of the present invention provides a method for correcting the firing point positions of a dual-vibrator excitation. It is set on a vibrator ship that can excite a dual vibrator. The method for correcting the firing point positions of the dual-vibrator excitation includes: when the vibrator ship excites the dual vibrator at the current moment, determining the distance between the dual vibrators; obtaining the theoretical survey line direction as the first direction; along the theoretical survey line direction, determining the later-positioned vibrator among the dual vibrators as the first vibrator and the earlier-positioned vibrator among the dual vibrators as the second vibrator; determining the direction from the first vibrator to the second vibrator as the second direction; calculating the included angle between the first direction and the second direction; based on the distance between the first vibrator and the second vibrator and the included angle between the first direction and the second direction, determining the offset compensation amount of the firing point distances of the first vibrator and the second vibrator; and correcting the firing point positions of the first vibrator and the second vibrator for the next time based on the offset compensation amount.

[0011] In some technical solutions, the step of correcting the firing point positions of the first vibrator and the second vibrator for the next time based on the offset compensation amount specifically includes: obtaining the theoretical firing point distances of the first vibrator and the second vibrator for the next excitation; comparing the relationship between the offset compensation amount and the offset compensation amount threshold; under the condition that the offset compensation amount is less than or equal to the offset compensation amount threshold, determining the actual firing point positions of the first vibrator and the second vibrator for the next time based on the offset compensation amount and the theoretical firing point distances; and under the condition that the offset compensation amount is greater than the offset compensation amount threshold, determining the actual firing point positions of the first vibrator and the second vibrator for the next time based on the offset compensation amount threshold and the theoretical firing point distances.

[0012] In some technical solutions, in the step of determining the actual firing point positions of the first vibrator and the second vibrator for the next time based on the offset compensation amount and the theoretical firing point distances, the actual firing point distance, the theoretical firing point distance, and the offset compensation amount of the first vibrator satisfy the following relational expression: D r1 =D d –S; where D r1 is the actual firing point distance of the first vibrator, D d is the theoretical firing point distance, and S is the offset compensation amount; the actual firing point distance, the theoretical firing point distance, and the offset compensation amount of the second vibrator satisfy the following relational expression: D r2 =D d +S; where D r2 is the actual firing point distance of the second vibrator, D d is the theoretical firing point distance, and S is the offset compensation amount.

[0013] In some technical solutions, in the step of determining the actual firing point positions of the first vibrator and the second vibrator for the next time based on the offset compensation amount threshold and the theoretical firing point distances, the actual firing point distance, the theoretical firing point distance, and the offset compensation amount threshold of the first vibrator satisfy the following relational expression: D r1 =D d –S d ; where D r1The actual shot point distance of the first seismic source, D d The theoretical shot point distance, S d The offset compensation amount threshold; the actual shot point distance, theoretical shot point distance, and offset compensation amount threshold of the second seismic source satisfy the following relational expression: D r2 = D d + S d ; where D r2 is the actual shot point distance of the second seismic source, D d is the theoretical shot point distance, S d is the offset compensation amount threshold.

[0014] In some technical solutions, the offset compensation amount threshold is related to the speed of the seismic source vessel and the theoretical shot point distance.

[0015] In some technical solutions, the steps for determining the distance between the two seismic sources specifically include: establishing a rectangular coordinate system; determining the position coordinates of the first seismic source and the second seismic source on the rectangular coordinate system based on the differential global positioning system and the relative positioning system; and determining the distance between the first seismic source and the second seismic source based on the position coordinates of the first seismic source and the second seismic source on the rectangular coordinate system.

[0016] The second aspect of the present invention provides a device for correcting the shot point position of dual seismic sources, which is arranged on a seismic source vessel. The seismic source vessel can excite the dual seismic sources. The device for correcting the shot point position of dual seismic sources includes: a determination module, configured to determine the distance between the dual seismic sources when the seismic source vessel excites the dual seismic sources at the current moment; an acquisition module, configured to acquire that the theoretical survey line direction is the first direction; the determination module is further configured to, along the theoretical survey line direction, determine the seismic source with a later position among the dual seismic sources as the first seismic source, and determine the seismic source with a previous position among the dual seismic sources as the second seismic source; determine the direction from the first seismic source to the second seismic source as the second direction; calculate the included angle between the first direction and the second direction; determine the offset compensation amount of the shot point distance between the first seismic source and the second seismic source based on the distance between the first seismic source and the second seismic source and the included angle between the first direction and the second direction; and correct the shot point positions of the first seismic source and the second seismic source for the next time based on the offset compensation amount.

[0017] The third aspect of the present invention provides an electronic device, including: a storage and a processor. A computer program or instruction is stored on the storage. When the processor executes the computer program or instruction, the method for correcting the shot point position of dual seismic sources according to any one of the technical solutions in the first aspect of the present invention is implemented.

[0018] The fourth aspect of the present invention provides a readable storage medium. A program or instruction is stored on the readable storage medium. When the processor executes the program or instruction, the method for correcting the shot point position of dual seismic sources according to any one of the technical solutions in the first aspect of the present invention is implemented.

[0019] The fifth aspect of the present invention provides a seismic source vessel, comprising: the dual-seismic-source excitation shot point position correction device according to the second aspect of the present invention; or the electronic device according to the third aspect of the present invention; or the readable storage medium according to the fourth aspect of the present invention.

[0020] In view of the problem of excessive longitudinal offset derived from seismic excitation using dual air gun seismic sources, the present invention specifically proposes a method for controlling the longitudinal offset of dual-source in marine seismic exploration. This method can achieve the control of the longitudinal offset of dual air gun seismic source operations within 5 meters under complex sea conditions, ensuring the imaging effect of seismic data and uniform coverage times. This innovative achievement plays an important technical support role in the efficient acquisition of marine seismic exploration and the imaging effect of seismic data, and also plays a leading role in the future efficient acquisition of marine seismic exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is one of the flow schematic diagrams of the dual-seismic-source excitation shot point position correction method provided by the embodiment of the present invention;

[0024] Figure 2 It is another flow schematic diagram of the dual-seismic-source excitation shot point position correction method provided by the embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of a single-ship dual-source ship array provided by the embodiment of the present invention;

[0026] Figure 4 It is one of the schematic diagrams of the principle of the dual-seismic-source excitation shot point position correction method provided by the embodiment of the present invention;

[0027] Figure 5 It is another schematic diagram of the principle of the dual-seismic-source excitation shot point position correction method provided by the embodiment of the present invention;

[0028] Figure 6 It shows a block diagram of the dual-seismic-source excitation shot point position correction device provided by the embodiment of the present invention;

[0029] Figure 7 It shows a block diagram of the electronic device provided by the embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the hardware structure of the electronic device according to an embodiment of the present invention. Detailed implementation manners

[0031] To make the objectives, embodiments, and advantages of the embodiments of the present invention clearer, the embodiments in the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] See Figure 1 , an embodiment of the first aspect of the present invention provides a method for correcting the shot point positions of dual-vibrator excitation. The method is arranged on a vibrator ship that can excite dual vibrators. The method for correcting the shot point positions of dual-vibrator excitation includes:

[0033] S102: When the vibrator ship excites dual vibrators at the current moment, determine the distance between the dual vibrators;

[0034] S104: Obtain that the theoretical survey line direction is the first direction;

[0035] S106: Along the theoretical survey line direction, determine the later-positioned vibrator among the dual vibrators as the first vibrator, and determine the earlier-positioned vibrator among the dual vibrators as the second vibrator;

[0036] S108: Determine the direction from the first vibrator to the second vibrator as the second direction, and calculate the included angle between the first direction and the second direction;

[0037] S110: Based on the distance between the first vibrator and the second vibrator, and the included angle between the first direction and the second direction, determine the offset compensation amount of the shot point distances of the first vibrator and the second vibrator, and correct the shot point positions of the first vibrator and the second vibrator for the next time based on the offset compensation amount.

[0038] Please combine Figure 4 and Figure 5, when the seismic source ship activates dual seismic sources at the current moment, determine the distance between the first seismic source 22 and the second seismic source 24, and then obtain the theoretical survey line direction as the first direction. The theoretical survey line direction is designed based on the mining area, terrain conditions, and geological structure, and can be preset in the system in advance. Then, along the theoretical survey line direction, determine the seismic source with the later position among the dual seismic sources as the first seismic source 22, that is, the position of point n1 is the position of the first seismic source 22, and determine the seismic source with the earlier position among the dual seismic sources as the second seismic source 24, that is, the position of point m1 is the position of the second seismic source 24. It should be noted here that the seismic sources exist in the form of an array, and the position of the first seismic source 22 in the present invention is defaulted to the center position of the first seismic source 22 array. Similarly, the position of the second seismic source 24 is defaulted to the center position of the second seismic source 24 array; then determine the direction from the first seismic source 22 to the second seismic source 24 as the second direction, and calculate the included angle between the first direction and the second direction, that is, calculate the included angle of ∠1. Since ∠1 and ∠2 are complementary angles, ∠2 can be calculated in this way. After knowing the distance between the first seismic source 22 and the second seismic source 24 and ∠2, the length 2S between point m1 and point m4 can be calculated. The length between point m1 and point m4 is also the deviation of the first seismic source 22 and the second seismic source 24 in the theoretical survey line direction. In the present invention, the value of the offset compensation amount is half of the length from point m1 to point m4, that is, the offset compensation amount is S. When S is not zero, it means that there is a position offset between the first seismic source 22 and the second seismic source 24 along the theoretical survey line direction. In the next seismic source activation, the first seismic source 22 can be activated in advance or the second seismic source 24 can be activated later, so that the first seismic source 22 and the second seismic source 24 are in the same position in the theoretical survey line direction, thus solving the offset problem.

[0039] In some embodiments, the step of correcting the excitation shot point positions of the first seismic source 22 and the second seismic source 24 for the next time based on the offset compensation amount specifically includes: obtaining the theoretical shot point distances of the first seismic source 22 and the second seismic source 24 for the next excitation; comparing the relationship between the offset compensation amount and the offset compensation amount threshold; under the condition that the offset compensation amount is less than or equal to the offset compensation amount threshold, determining the actual shot point positions of the first seismic source 22 and the second seismic source 24 for the next time based on the offset compensation amount and the theoretical shot point distances; under the condition that the offset compensation amount is greater than the offset compensation amount threshold, determining the actual shot point positions of the first seismic source 22 and the second seismic source 24 for the next time based on the offset compensation amount threshold and the theoretical shot point distances.

[0040] In this embodiment, when correcting the excitation shot point positions of the first seismic source 22 and the second seismic source 24 for the next time, first obtain the theoretical shot point distances of the first seismic source 22 and the second seismic source 24 for the next excitation; where the theoretical shot point distances D of the first seismic source 22 and the second seismic source 24 d are the same, and the theoretical shot point distance D dIt is determined comprehensively based on various conditions such as exploration objectives, surface conditions, seismic equipment, and resource limitations, and is pre-set in the program in advance. Then, the relationship between the offset compensation amount and the offset compensation amount threshold is compared. Under the condition that the offset compensation amount is less than or equal to the offset compensation amount threshold, based on the offset compensation amount and the theoretical shotpoint distance D d the actual shotpoint positions of the next first seismic source 22 and second seismic source 24 are determined; under the condition that the offset compensation amount is greater than the offset compensation amount threshold, based on the offset compensation amount threshold and the theoretical shotpoint distance D d the actual shotpoint positions of the next first seismic source 22 and second seismic source 24 are determined. In the present invention, an offset compensation amount threshold is set, so that the minimum cycle time of the navigation system and the balloon control system can be satisfied. When the correction value is too large, the system cannot operate. In addition, setting the offset compensation amount threshold can meet the requirements of seismic acquisition. Some projects have requirements for the minimum excitation time interval. During this time period, the uniqueness of the seismic source excitation must be ensured.

[0041] In some embodiments, in the step of determining the actual shotpoint positions of the next first seismic source 22 and second seismic source 24 based on the offset compensation amount and the theoretical shotpoint distance, the actual shotpoint distance, theoretical shotpoint distance, and offset compensation amount of the first seismic source 22 satisfy the following relational expression:

[0042] D r1 = D d – S;

[0043] wherein, D r1 is the actual shotpoint distance of the first seismic source 22, D d is the theoretical shotpoint distance, and S is the offset compensation amount;

[0044] The actual shotpoint distance, theoretical shotpoint distance, and offset compensation amount of the second seismic source 24 satisfy the following relational expression:

[0045] D r2 = D d + S;

[0046] wherein, D r2 is the actual shotpoint distance of the second seismic source 24, D d is the theoretical shotpoint distance, and S is the offset compensation amount.

[0047] In this embodiment, referring to Figure 5 , since there is a position deviation between the current first seismic source 22 point n1 and the current second seismic source 24 point m1 in the theoretical survey line direction, in order to overcome the deviation of the next first seismic source 22 point and second seismic source 24 point, it is necessary to calculate the actual shotpoint distance D r1 of the next first seismic source 22 point, and the actual shotpoint distance D r2 of the next second seismic source 24 point. When calculating the actual shotpoint distance D of the next first seismic source 22 pointr1 When calculating the actual shot point distance D of the next second seismic source 24, it can be calculated based on the formula D r1 = D d – S. When calculating the actual shot point distance D of the next first seismic source 22, it can be calculated based on the formula D r2 = D r2 = D d + S. In this way, the shot point distances of the next first seismic source 22 and the next second seismic source 24 can be corrected. Among them, point n3 is the position of the first seismic source 22 before correction, point n2 is the position of the first seismic source 22 after correction, point m3 is the position of the second seismic source 24 before correction, and point m2 is the position of the second seismic source 24 after correction. Then, the next first seismic source 22 can be excited at the position of n2, and the next second seismic source 24 can be excited at the position of m2, thus overcoming the problem of longitudinal deviation between the next first seismic source 22 and the second seismic source 24.

[0048] In some embodiments, in the step of determining the actual shot point positions of the next first seismic source 22 and the second seismic source 24 based on the offset compensation amount threshold and the theoretical shot point distance, the actual shot point distance, the theoretical shot point distance, and the offset compensation amount threshold of the first seismic source 22 satisfy the following relational expression: D r1 = D d – S d ; where D r1 is the actual shot point distance of the first seismic source 22, D d is the theoretical shot point distance, and S d is the offset compensation amount threshold; the actual shot point distance, the theoretical shot point distance, and the offset compensation amount threshold of the second seismic source 24 satisfy the following relational expression: D r2 = D d + S d ; where D r2 is the actual shot point distance of the second seismic source 24, D d is the theoretical shot point distance, and S d is the offset compensation amount threshold.

[0049] In this embodiment, when the offset compensation amount is greater than the offset compensation amount threshold, the offset compensation amount threshold is used to replace the offset compensation amount for calculation, and its calculation principle is the same as above, which will not be elaborated here.

[0050] In some embodiments, the offset compensation amount threshold is related to the speed of the seismic source vessel and the theoretical shot point distance.

[0051] In this embodiment, the offset compensation threshold is related to the theoretical shot point distance and the speed of the source ship during operation. Taking the theoretical shot point distance of 25 meters and the ship speed of 5 knots as an example, theoretically, it takes about 10 seconds for the current excitation point to reach the next excitation point, and the navigation system requires at least 3 seconds of cycle time. Thus, the remaining 7 seconds can be allocated to the current point and the next point. In this case, the compensation threshold is 5 knots × 7 / 2 seconds, which is approximately equal to 9 meters. After being conservative, the offset compensation threshold is usually set to 7 meters or 8 meters. In the current actual operation, generally, the offset compensation threshold does not exceed 3 meters and is not less than 0 meters (calculated based on the theoretical shot point distance of 12.5 meters).

[0052] In some embodiments, the steps for determining the distance between the two sources specifically include: establishing a rectangular coordinate system; determining the position coordinates of the first source 22 and the second source 24 on the rectangular coordinate system based on the differential global positioning system and the relative positioning system; and determining the distance between the first source 22 and the second source 24 based on the position coordinates of the first source 22 and the second source 24 on the rectangular coordinate system.

[0053] In this embodiment, a differential global positioning system and a relative positioning system are provided on the source ship. When determining the distance between the two sources, first, the absolute position of the DGPS (differential global positioning system) of the source ship is determined. According to the relative relationship between the DGPS of the source ship and the ship reference point, the absolute position of the ship reference point is calculated. Using the relative relationship between the RGPS (relative positioning system) base station and the ship reference point, the absolute position of the RGPS base station is obtained. Since multiple tail marks are installed on each array of the source, and the base station can obtain the distance, azimuth, and height difference between the tail marks installed on the source and the base station, the absolute position of each tail mark can be obtained. Finally, based on the absolute positions of the tail marks, the position coordinates of the first source 22 and the second source 24 at the current moment in the coordinate system are determined, and further, the distance between the first source 22 and the second source 24 is determined.

[0054] This embodiment provides a longitudinal deviation control method for single-ship dual-source excitation in marine seismic exploration. This method mainly relies on an integrated navigation system to achieve, and the specific content includes the calculation of the center position of the dual air gun source array, the calculation of the distortion length of the dual air gun source array, the correction of the distance to the theoretical point along the survey line direction, and the intelligent judgment of the excitation stake number. In the implementation process, the present invention provides the following embodiments: An air gun source ship equipped with a global positioning system, a relative positioning system, a gyrocompass, etc., an air gun control system for controlling the excitation of the air gun array, and the software is an integrated navigation system with the method of the present invention. The integrated navigation system on the dual air gun source ship accesses all the above-mentioned external sensors, calculates the center positions of the left and right array sources through Kalman filtering, calculates the array distortion length according to the angle between the line connecting the center positions of the left and right array sources and the theoretical survey line direction, projects to obtain the longitudinal distance to the theoretical point along the survey line direction, and dynamically adjusts the excitation stake number according to the distance between the center of the expected excitation source array and the nearest theoretical design point, ultimately ensuring that the excitation array is closer to the theoretical design point along the survey line direction.

[0055] The technical method of the present invention includes the processes of the following examples (a) to (c).

[0056] (a) Calculation and application of "longitudinal offset compensation": In order to ensure that when the dual air gun source is excited under complex sea conditions, the actual excitation position is closer to the theoretical design position, reduce the excitation longitudinal deviation, and meet a more uniform coverage rate and seismic data imaging effect, calculate the grid coordinates of the center positions of the left and right sources of the dual air gun array after the current shot is excited, obtain the planar distance between the two and the angle between the azimuth of the line connecting the two and the theoretical survey line azimuth from the grid coordinates of the center positions of the sources, and finally obtain the longitudinal offset compensation for the next excitation point. The longitudinal offset calculation formula is as follows:

[0057]

[0058] α = β - X;

[0059] S = (L × cosα) ÷ 2;

[0060] Where, L is the distance between the first source and the second source, X P is the abscissa of the first source in the rectangular coordinate system, Xs is the abscissa of the second source in the rectangular coordinate system, Y P is the ordinate of the first source in the rectangular coordinate system, Y Sis the ordinate of the second seismic source in the rectangular coordinate system; α is the angle between the line connecting the centers of the first and second seismic sources and the direction of the theoretical survey line, β is the angle between the direction from the center of the left-source array seismic source to the center of the right-source array seismic source and the reference line, X is the azimuth of the theoretical survey line, that is, the angle between the direction of the theoretical survey line and the reference line. When cosα is negative, the azimuth of the theoretical survey line is calculated by adding 180°. S is the longitudinal offset compensation, and cosα is the cosine function.

[0061] Among them, since the air gun seismic source ship is usually equipped with two air gun arrays, please refer to Figure 3 , and the seismic source is also presented in the form of an array. Therefore, the first seismic source of the present invention can be understood as the center of the left-source array, and the second seismic source can be understood as the center of the right-source array. L is also the distance between the centers of the first and second seismic sources.

[0062] Application of longitudinal offset compensation: After the current shot is fired, calculate the longitudinal offset compensation value according to the above formula, recalculate the shot point distance, and then use the new shot point distance to predict the firing time. The formula for calculating the shot point distance is:

[0063] D r1 = D d – S;

[0064] D r2 = D d + S;

[0065] Among them, D r1 is the actual shot point distance of the first seismic source, D r2 is the actual shot point distance of the second seismic source, D d is the theoretical shot point distance, and S is the offset compensation amount.

[0066] When the longitudinal offset compensation is greater than the maximum offset compensation correction set externally, the formula for calculating the shot point distance is:

[0067] D r1 = D d – S d ;

[0068] D r2 = D d + S d ;

[0069] Among them, D r1 is the actual shot point distance of the first seismic source, D r2 is the actual shot point distance of the second seismic source, D d is the theoretical shot point distance, and S d is the offset compensation amount threshold, and the positive and negative signs of this value are the same as those of the calculated longitudinal offset compensation S.

[0070] (b) Intelligent control of the shot point number for dual air gun sources; when using the integrated navigation software to conduct left and right source excitations with dual air gun sources, the integrated navigation software matches the center positions of the left and right array sources with the theoretical designed shot point positions, and intelligently determines the nearest shot point number and excitation array, ensuring the correctness of the shot point numbers and excitation arrays of the left and right arrays under complex sea conditions.

[0071] (c) During the actual blasting operation of the dual air gun source ship, the integrated navigation software first calculates the longitudinal offset compensation, then obtains the corrected shot point distance based on the longitudinal offset compensation and the theoretical shot point distance, intelligently determines the shot point number of the next shot according to the shot point number, position after correcting the shot point distance, and the center positions of the left and right array sources, judges the excitation array according to the shot point number, and finally obtains an excitation result with a small longitudinal offset.

[0072] Another embodiment of the present invention provides a method for controlling the longitudinal offset of a single ship with dual sources in marine seismic exploration. The implementation of this method is mainly completed by an integrated navigation system composed of a set of global positioning receivers, a set of integrated navigation software for marine seismic exploration, a set of RGPS (Relative Positioning GPS) systems, a set of gyrocompasses, a signal trigger synchronization controller, and a navigation workstation. It consists of four steps: calculating the center position of the dual air gun source array, calculating the distortion length of the dual air gun source array, correcting the distance to the theoretical point along the survey line direction, and intelligently judging the shot point number for excitation.

[0073] Please refer to Figure 2 , the method for controlling the longitudinal offset of a single ship with dual sources in marine seismic exploration includes:

[0074] S202: Calculate the center position of the dual air gun source array;

[0075] This step mainly includes two processes. The first step is to obtain the position of the ship through Kalman filtering of DGPS data. The second step is to calculate the center position of the dual air gun source array through the position of the ship and RGPS.

[0076] S204: Calculate the distortion length of the dual air gun source array;

[0077] This step mainly includes two processes. The first step is to calculate the angle between the line connecting the center positions of the left and right array sources and the survey line. The second step is to calculate the offset of the source array along the survey line direction;

[0078] S206: Correct the distance to the theoretical point along the survey line direction;

[0079] This step mainly includes two processes. The first step is to judge the offset and the maximum offset to obtain the actual correction value. The second step is to update the actual distance to the target point;

[0080] S208: Intelligently judge the shot point number for excitation.

[0081] This step mainly includes two processes. The first is to determine the nearest theoretical design stake number of the current array, and the second is to perform predictive excitation.

[0082] The single-ship dual-source longitudinal deviation control method for marine seismic exploration provided in this embodiment first obtains the spatial position of the center of the ship reference point of the single-ship dual-airgun seismic source ship according to the global positioning receiver, uses the Kalman filter to obtain the stable spatial position and continuous navigation speed of the working ship, combines the distance and azimuth observation values output at a frequency of 1HZ provided by the RGPS (Relative GPS) system, calculates the plane position of the center of the left and right array seismic sources, calculates the angle between the two according to the connection line of their real-time positions and the direction of the survey line, calculates the longitudinal deviation compensation, and then compares it with the maximum externally set longitudinal deviation compensation, applies the final longitudinal deviation compensation value to the distance to the next excitation point, and at the same time performs intelligent stake number control according to the actual positions of the left and right seismic source arrays. According to the principle of exciting at the nearest stake number of the seismic source array, determine the stake number of the shot point to be excited, then predict the arrival time according to the distance to the point after correcting the longitudinal deviation compensation, use the configured synchronous controller to trigger the seismic source array to perform excitation. After the excitation is completed, the navigation system will record the actual stake number of the excitation and the position of the center of the array seismic source into a file.

[0083] In summary, the single-ship dual-source longitudinal deviation control method for marine seismic exploration can automatically calculate the longitudinal deviation compensation and apply it to the next shot point to be excited, intelligently control the stake number of the excitation, minimize the longitudinal deviation during the dual-source array operation, improve the imaging effect and uniform coverage of seismic data, and further improve the efficiency of marine seismic exploration acquisition construction.

[0084] The present invention realizes the deviation correction along the survey line direction for single-ship dual-source excitation in bad weather, so as to ensure the imaging effect and uniform coverage times of seismic data when using dual-source operation in marine seismic exploration, and meet the requirements of efficient and high-quality acquisition.

[0085] See Figure 6, in the second aspect of the present invention, a dual-vibrator excitation shot point position correction device 1 is provided, which is arranged on a vibrator ship. The vibrator ship can excite dual vibrators. The dual-vibrator excitation shot point position correction device 1 includes a determination module 14 and an acquisition module 12. The determination module 14 is used to determine the distance between the dual vibrators when the vibrator ship excites the dual vibrators at the current moment. The acquisition module 12 is used to acquire the theoretical survey line direction as the first direction. The determination module 14 is further used to determine, along the theoretical survey line direction, the later-positioned vibrator among the dual vibrators as the first vibrator, and the earlier-positioned vibrator among the dual vibrators as the second vibrator. The direction from the first vibrator to the second vibrator is determined as the second direction. Calculate the included angle between the first direction and the second direction. Based on the distance between the first vibrator and the second vibrator and the included angle between the first direction and the second direction, determine the offset compensation amount of the excitation shot point distance between the first vibrator and the second vibrator. Based on the offset compensation amount, correct the excitation shot point positions of the first vibrator and the second vibrator for the next time.

[0086] The dual-vibrator excitation shot point position correction device 1 in the embodiments of the present application can be a device, or a component, an integrated circuit, or a chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device can be a mobile phone, a tablet computer, a laptop computer, a handheld computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer, a netbook, or a personal digital assistant, etc. The non-mobile electronic device can be a server, a network attached storage, a personal computer, a television set, a teller machine, or a self-service machine, etc. The embodiments of the present application do not make specific limitations.

[0087] The dual-vibrator excitation shot point position correction device 1 in the embodiments of the present application can be a device with an operating system. The operating system can be an Android operating system, an iOS operating system, or other possible operating systems. The embodiments of the present application do not make specific limitations.

[0088] The dual-vibrator excitation shot point position correction device 1 provided in the embodiments of the present application can implement each process implemented by the above method embodiments. To avoid repetition, it will not be elaborated here.

[0089] As Figure 7 shown, in the third aspect of the present invention, an electronic device 700 is provided, which includes a processor 701, a memory 702, and a program or instruction stored on the memory 702 and executable on the processor 701. When the program or instruction is executed by the processor 701, it implements the above dual-vibrator excitation shot point position correction method and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0090] It should be noted that the electronic devices in the embodiments of the present application include mobile electronic devices and non-mobile electronic devices.

[0091] It should be noted that the electronic device in the embodiments of the present application includes mobile electronic devices, such as mobile phones, and may also include non-mobile electronic devices, such as computers, etc.

[0092] Figure 6 FIG. 2000 is a schematic diagram of the hardware structure of another electronic device according to an embodiment of the present application.

[0093] The electronic device 2000 includes, but is not limited to: a radio frequency unit 2001, a network module 2002, an audio output unit 2003, an input unit 2004, a sensor 2005, a display unit 2006, a user input unit 2007, an interface unit 2008, a memory 2009, a processor 2010, and other components.

[0094] Those skilled in the art can understand that the electronic device 2000 may further include a power supply 2011 (such as a battery) for supplying power to each component. The power supply 2011 may be logically connected to the processor 2010 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 4 The structure of the electronic device shown in FIG. does not limit the electronic device. The electronic device may include more or fewer components than shown, or combine some components, or have different component arrangements, which will not be elaborated here.

[0095] Among them, the user input unit 2007 receives a first input.

[0096] The processor 2010 generates and stores a corresponding original operation record according to the first input, where the original operation record includes at least one original operation node;

[0097] The user input unit 2007 receives a second input for a target operation node in the operation nodes.

[0098] The processor 2010 generates an adjusted simulated operation record in response to the second input.

[0099] Control the electronic device to run the corresponding program or function according to the simulated operation record.

[0100] In some embodiments, the first input includes at least one input step, and each original operation node includes an input step and a corresponding operation result.

[0101] Among them, the operation result is: the feedback result output by the program or function of the electronic device after receiving the input step.

[0102] The input unit 2004 obtains the program or function corresponding to the first input.

[0103] The memory 2009 records each input step and the corresponding operation result in the input order of the input steps.

[0104] The processor 2010 saves the program or function corresponding to the first input, the input step, and the operation result in the input order, and forms an original operation record.

[0105] In some embodiments, the display unit 2006 displays an identifier associated with the original operation record.

[0106] The user input unit 2007 receives a third input to the identifier.

[0107] In response to the third input, the display unit 2006 displays the original operation nodes in the original operation record in the input order.

[0108] In some embodiments, the processor 2010 adjusts the target input step corresponding to the target operation node according to the second input to obtain an adjusted simulated input step.

[0109] The processor 2010 controls the electronic device to run the program or function corresponding to the target input step according to the simulated input step to obtain a simulated operation result corresponding to the simulated input step.

[0110] The processor 2010 generates a corresponding simulated operation node according to the simulated input step and the simulated operation result, and generates a simulated operation record according to the simulated operation node.

[0111] Among them, the input order corresponding to the simulated operation node is the same as the input order corresponding to the target operation node.

[0112] In some embodiments, the user input unit 2007 receives a run input.

[0113] In response to the run input, the processor 2010 controls the electronic device to run the corresponding program or function according to the simulated operation record.

[0114] In some embodiments, the processor 2010 respectively determines the simulated operation results of each simulated operation node in each simulated operation record among multiple simulated operation records.

[0115] When there are any two simulated operation records and the simulated operation results of the corresponding simulated operation nodes in the two simulated operation records are different, the display unit 2006 displays a corresponding prompt message.

[0116] In the embodiment of the present application, the first input of the user is saved, and the original operation nodes are formed according to each operation step. After an operation error occurs, the user can trace back to the operation node where the error occurs and make targeted corrections. After the correction, according to the saved correct nodes and the corrected nodes, a complete operation record is formed and executed, avoiding the user from manually operating from the beginning. On the one hand, it realizes the quick correction of misoperations. On the other hand, it does not require the user to operate again, fundamentally avoiding the possibility of misoperations again and improving the user's interaction experience.

[0117] It should be understood that in the embodiment of the present application, the input unit 2004 may include a graphics processor 5082 and a microphone 5084. The graphics processor 5082 processes the image data of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode.

[0118] The display unit 2006 may include a display panel 5122. The display panel 5122 can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 2007 includes a touch panel 5142 and other input devices 5144. The touch panel 5142 is also called a touch screen. The touch panel 5142 may include two parts: a touch detection device and a touch controller. The other input devices 5144 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here. The memory 2009 can be used to store software programs and various data, including but not limited to application programs and operating systems. The processor 2010 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above modem processor may not be integrated into the processor 2010.

[0119] The fourth aspect of the present invention provides a readable storage medium. A program or instruction is stored on the readable storage medium. When the processor executes the program or instruction, it implements the double-vibrator excitation shot point position correction method provided in any one of the embodiments of the first aspect of the present application.

[0120] Wherein, the processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory, a random access memory, a magnetic disk or an optical disc, etc.

[0121] The dual-vibrator excitation shot point position correction method can be implemented in various different ways according to specific features and / or example applications. For example, these methods can be implemented through a combination of hardware, firmware, and / or software. For example, in a hardware implementation, a processor can be implemented in one or more application-specific integrated circuits, digital signal processors, digital signal processing devices, programmable logic devices, field-programmable gate arrays, controllers, microcontrollers, microprocessors, electronic devices, other device units for performing the above functions, and / or combinations thereof.

[0122] A computer-readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. A computer-readable storage medium can be an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the above devices, but is not limited thereto. A non-exhaustive list of more specific examples of computer-readable storage media includes: portable computer floppy disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, static random access memories, portable compact disc read-only memories, digital versatile disks, memory cards, floppy disks, encoding mechanical devices (such as punched cards or grooves with raised structures recording instructions), and any suitable combination of the above devices. The computer-readable storage medium used herein should not be construed as a signal itself, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media, or electrical signals transmitted through wires, etc.

[0123] Another embodiment of this application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement each process of the control method embodiment of the above electronic device, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0124] It should be understood that the chip mentioned in the embodiments of this application can also be referred to as a system-on-chip, system chip, chip system, or system-on-chip, etc.

[0125] In the fifth aspect of the present invention, a seismic source vessel includes: the dual-vibrator excitation shot point position correction device as in the second aspect of the present invention; or the electronic device as in the third aspect of the present invention; or the readable storage medium as in the fourth aspect of the present invention.

[0126] In an embodiment according to the present invention, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "mounted", "connected", "coupled", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "coupled" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0127] Although this specification contains many specific implementation details, these should not be construed as limiting the scope of any invention or the scope of what is claimed, but rather are mainly used to describe the features of specific embodiments of a particular invention. Certain features described in multiple embodiments in this specification can also be combined and implemented in a single embodiment. On the other hand, the various features described in a single embodiment can also be separately implemented in multiple embodiments or implemented in any suitable sub-combination. In addition, although features may operate in certain combinations as described above and are even initially claimed as such, one or more features from the claimed combination can in some cases be removed from the combination, and the claimed combination can be directed to a sub-combination or a variation of a sub-combination.

[0128] Similarly, although operations are depicted in the drawings in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or sequentially, or that all illustrated operations be performed to achieve the desired result. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of the various system modules and components in the above embodiments should not be construed as required in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

[0129] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the acts recited in the claims can be performed in a different order and still achieve the desired result. In addition, the processes depicted in the drawings are not necessarily in the particular order or sequential order shown to achieve the desired result. In some implementations, multitasking and parallel processing may be advantageous.

[0130] It should be noted that, in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0131] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for correcting the position of shot points excited by a double seismic source, characterized in that, It is arranged on a seismic source ship, and the seismic source ship can excite a dual seismic source. The method for correcting the excitation shot point positions of the dual seismic source includes: When the seismic source ship excites the dual seismic source at the current moment, determining the distance between the dual seismic sources; Obtaining the theoretical survey line direction as the first direction; Along the theoretical survey line direction, determining the seismic source with a later position among the dual seismic sources as the first seismic source, and determining the seismic source with a previous position among the dual seismic sources as the second seismic source; Determining the direction from the first seismic source to the second seismic source as the second direction; Calculating the included angle between the first direction and the second direction; Based on the distance between the first seismic source and the second seismic source, and the included angle between the first direction and the second direction, determining the offset compensation amount of the excitation shot point distances of the first seismic source and the second seismic source; Based on the offset compensation amount, correcting the excitation shot point positions of the first seismic source and the second seismic source for the next time.

2. The method for correcting the shot point position of dual-vibrator excitation according to claim 1, wherein The step of correcting the excitation shot point positions of the first seismic source and the second seismic source for the next time based on the offset compensation amount specifically includes: Obtaining the theoretical shot point distances of the first seismic source and the second seismic source when they are excited next time; Comparing the relationship between the offset compensation amount and the offset compensation amount threshold; Under the condition that the offset compensation amount is less than or equal to the offset compensation amount threshold, determining the actual shot point positions of the first seismic source and the second seismic source for the next time based on the offset compensation amount and the theoretical shot point distances; Under the condition that the offset compensation amount is greater than the offset compensation amount threshold, determining the actual shot point positions of the first seismic source and the second seismic source for the next time based on the offset compensation amount threshold and the theoretical shot point distances.

3. The method for correcting the shot point position of dual-source excitation according to claim 2, wherein In the step of determining the actual shot point positions of the first seismic source and the second seismic source for the next time based on the offset compensation amount and the theoretical shot point distances, The actual shot point distance of the first seismic source, the theoretical shot point distance, and the offset compensation amount satisfy the following relational expression: D r1 = D d – S; Among them, D r1 is the actual shot point distance of the first seismic source, D d is the theoretical shot point distance, and S is the migration compensation amount; The actual shot point distance of the second seismic source, the theoretical shot point distance, and the offset compensation amount satisfy the following relational expression: D r2 = D d + S; Among them, D r2 is the actual shotpoint distance of the second seismic source, D d is the theoretical shotpoint distance, and S is the migration compensation amount.

4. The method for correcting the shot point position of dual-vibrator excitation according to claim 2, wherein In the step of determining the actual shot point positions of the first seismic source and the second seismic source for the next time based on the offset compensation amount threshold and the theoretical shot point distances, The actual shot point distance of the first seismic source, the theoretical shot point distance, and the offset compensation amount threshold satisfy the following relational expression: D r1 = D d – S d ; Among them, D r1 is the actual shot point distance of the first seismic source, D d is the theoretical shot point distance, S d is the offset compensation amount threshold; The actual shot point distance of the second seismic source, the theoretical shot point distance, and the offset compensation amount threshold satisfy the following relational expression: D r2 = D d + S d ; Among them, D r2 is the actual shotpoint distance of the second seismic source, D d is the theoretical shotpoint distance, and S d is the offset compensation amount threshold.

5. The method for correcting the shot point position of dual seismic source excitation according to claim 2, wherein The offset compensation amount threshold is related to the speed of the seismic source ship and the theoretical shot point distance.

6. The method for correcting the shot point position of dual-vibrator excitation according to claim 1, characterized in that The step of determining the distance between the dual seismic sources specifically includes: Establishing a rectangular coordinate system; Based on the differential global positioning system and the relative positioning system, determining the position coordinates of the first seismic source and the second seismic source on the rectangular coordinate system; Based on the position coordinates of the first seismic source and the second seismic source on the rectangular coordinate system, determining the distance between the first seismic source and the second seismic source.

7. A device for correcting the position of shot points in dual-source excitation, characterized in that It is arranged on a seismic source ship, and the seismic source ship can excite a dual seismic source. The device for correcting the excitation shot point positions of the dual seismic source includes: A determination module, configured to determine the distance between the two seismic sources when the seismic source vessel activates the two seismic sources at the current moment; An acquisition module, configured to acquire that the theoretical survey line direction is the first direction; The determination module is further configured to Along the theoretical survey line direction, determine the seismic source with a later position among the two seismic sources as the first seismic source, and determine the seismic source with an earlier position among the two seismic sources as the second seismic source; Determine the direction from the first seismic source to the second seismic source as the second direction; Calculate the included angle between the first direction and the second direction; Based on the distance between the first seismic source and the second seismic source, and the included angle between the first direction and the second direction, determine the offset compensation amount of the shotpoint distance between the first seismic source and the second seismic source; Based on the offset compensation amount, correct the shotpoint positions of the first seismic source and the second seismic source for the next time.

8. An electronic device, characterized in that, Comprising: A storage and a processor, wherein a computer program or instruction is stored on the storage, and when the processor executes the computer program or the instruction, the method for correcting the shotpoint positions of the two seismic sources according to any one of claims 1 to 7 is implemented.

9. A readable storage medium, characterized in that, A program or instruction is stored on the readable storage medium, and when the processor executes the program or the instruction, the method for correcting the shotpoint positions of the two seismic sources according to any one of claims 1 to 7 is implemented.

10. A seismic source vessel, characterized in that, Comprising: The device for correcting the shotpoint positions of the two seismic sources according to claim 7; Or The electronic device according to claim 8; Or The readable storage medium according to claim 9.

Images