Preferred methods, apparatuses, electronic devices, and storage media for constructing traps

Abstract

The application discloses a preferred method, device, electronic equipment and storage medium for constructing traps. The method comprises the following steps: determining a plurality of target structural traps of each target stratum corresponding to a target region based on a depth domain construction map of the target region; determining a first velocity corresponding to the target structural trap based on a blind well velocity field constructed by a well calibration average velocity and a root mean square velocity spectrum of a target well and a target stratum of the target structural trap, and determining a second velocity corresponding to the target structural trap based on an optimal velocity field and the target stratum of the target structural trap; predicting a burial depth error of the target structural trap based on the first velocity and the second velocity, determining a comparison result of the target structural trap based on the burial depth error of the target structural trap and a preset threshold, and determining a drilling sequence of the plurality of target structural traps based on the comparison result of each target structural trap. The embodiment solves the problem that the depth error of the structural trap affects the accuracy of the preferred structural trap, and avoids the influence of the velocity field construction error on exploration.

Description

Technical Field

[0001] This invention relates to the field of seismic exploration structural interpretation technology, and in particular to a preferred method, apparatus, electronic device and storage medium for structural traps. Background Technology

[0002] Low-amplitude structural traps refer to geological bodies with relatively gentle structures and a closure amplitude of only about 10-20 meters. Although the structural scale is not large, under favorable source-reservoir-seal conditions and hydrocarbon migration, low-amplitude structural traps can form "small but fertile" high-yield oil and gas reservoirs. With the continuous improvement of exploration, large structural oil and gas reservoirs that are easy to discover are becoming increasingly rare. At present, low-amplitude structural traps have become an important replacement area for in-depth exploration of oil and gas basins.

[0003] Currently, the selection of low-amplitude structural traps is mainly evaluated from the following aspects: Assuming good seismic data quality and accurate structural interpretation results, firstly, structural traps in the time domain and depth domain are compared, and traps with consistent structural morphology in both domains are selected; then, based on the amplitude and area of ​​the structural traps, traps with larger structural scales are selected; finally, based on geological background data, structural traps are comprehensively evaluated from aspects such as oil source potential and reservoir conditions. However, the above methods, due to errors in velocity field establishment, can cause depth errors in structural traps, thus affecting the accuracy of selecting structural traps and consequently impacting the depth design of the target drilling interval. Summary of the Invention

[0004] This invention provides a preferred method, apparatus, electronic device, and storage medium for constructing traps, in order to address the impact of depth errors in trap construction on the accuracy of preferred traps, avoid the influence of velocity field establishment errors on exploration, reduce exploration risks, and improve the success rate of exploration targets.

[0005] According to one aspect of the present invention, a preferred method for constructing a trap is provided, the method comprising:

[0006] A depth domain structural map of the target area is determined, and multiple target structural traps of each target stratum corresponding to the target area are determined based on the depth domain structural map. The depth domain structural map includes depth domain structural maps of multiple target strata. The depth domain structural map is obtained by performing time-depth conversion on the optimal velocity field. The optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area.

[0007] Obtain the well calibration average velocity and root mean square velocity spectrum of a predetermined number of target wells in the target area; construct the blind well velocity field of the target area based on the well calibration average velocity and root mean square velocity spectrum of the target wells; the predetermined number is less than the total number of wells in the target area;

[0008] Based on the blind well velocity field and the target formation of the target structural trap, a first velocity corresponding to the target structural trap is determined, and based on the optimal velocity field and the target formation of the target structural trap, a second velocity corresponding to the target structural trap is determined; the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity corresponding to the target formation of the target structural trap determined in the optimal velocity field.

[0009] The burial depth error of the target trap is predicted based on the first velocity and the second velocity. The burial depth error has a one-to-one correspondence with the first velocity and the second velocity. The burial depth error is used to describe the degree of error in the depth of the trap.

[0010] The comparison results of the target structural traps are determined based on the burial depth error of the target structural traps and a preset threshold. The drilling sequence of multiple target structural traps is determined based on the comparison results of each target structural trap. The drilling sequence is used to describe the order in which the target structural traps are drilled.

[0011] According to another aspect of the invention, a preferred device for constructing a closed loop is provided, the device comprising:

[0012] A trap identification module is used to determine the depth domain structural map of a target area, and to determine multiple target structural traps of each target stratum corresponding to the target area based on the depth domain structural map. The depth domain structural map includes depth domain structural maps of multiple target strata. The depth domain structural map is obtained by performing time-depth conversion on the optimal velocity field. The optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area.

[0013] The velocity field determination module is used to obtain the well calibration average velocity corresponding to a preset number of target wells in the target area and the root mean square velocity spectrum of the target area, and to construct the blind well velocity field of the target area based on the well calibration average velocity and root mean square velocity spectrum of the target wells; the preset number is less than the number of all wells in the target area;

[0014] A velocity determination module is used to determine a first velocity corresponding to the target structural trap based on the blind well velocity field and the target formation of the target structural trap, and to determine a second velocity corresponding to the target structural trap based on the optimal velocity field and the target formation of the target structural trap; the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity corresponding to the target formation of the target structural trap determined in the optimal velocity field;

[0015] The burial depth error determination module is used to predict the burial depth error of the target construction trap based on the first velocity and the second velocity. The burial depth error has a one-to-one correspondence with the first velocity and the second velocity, and the burial depth error is used to describe the degree of error in the depth of the construction trap.

[0016] The preferred module is used to determine the comparison result of the target structural trap based on the burial depth error of the target structural trap and a preset threshold, and to determine the drilling sequence of multiple target structural traps based on the comparison result of each target structural trap. The drilling sequence is used to describe the order in which the target structural traps are drilled.

[0017] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0018] At least one processor; and

[0019] A memory communicatively connected to the at least one processor; wherein,

[0020] The memory stores a computer program that can be executed by the at least one processor, such that the at least one processor can perform the preferred method for constructing a trap as described in any embodiment of the present invention.

[0021] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the preferred method for constructing a trap as described in any embodiment of the present invention.

[0022] In the technical solution of this invention, the optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area. The depth domain structural map is obtained by time-depth conversion of the optimal velocity field. After determining the depth domain structural map of the target area, multiple target structural traps in the target area are determined based on the target formation depth domain structural map, achieving accurate identification of structural traps. Furthermore, a preset number less than the number of all wells in the target area is used to obtain the well calibration average velocity corresponding to a preset number of target wells in the target area and the root mean square velocity spectrum of the target area. Based on the well calibration average velocity and root mean square velocity spectrum of the target wells, a blind well velocity field of the target area is constructed, achieving accurate construction of the blind well velocity field, so as to facilitate subsequent error comparison between the blind well velocity field and the optimal velocity field. That is, the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity determined in the optimal velocity field. The average velocity corresponding to the target formation of the target structural trap is determined. Based on the blind well velocity field and the target formation of the target structural trap, the first velocity corresponding to the target structural trap is determined. Based on the optimal velocity field and the target formation of the target structural trap, the second velocity corresponding to the target structural trap is determined. Since the burial depth error has a one-to-one correspondence with the first and second velocities, and the burial depth error is used to describe the degree of error in the depth of the structural trap, the burial depth error of the target structural trap can be accurately predicted based on the first and second velocities. The comparison result of the target structural trap is determined based on the burial depth error of the target structural trap and a preset threshold. Based on the comparison result of each target structural trap, the drilling sequence of multiple target structural traps is determined to describe the order in which the target structural traps are drilled. This solves the problem of the depth error of the structural trap affecting the accuracy of the optimal structural trap, avoids the impact of velocity field errors on exploration, reduces exploration risks, and improves the success rate of exploration targets.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a flowchart of a preferred method for constructing a trap according to an embodiment of the present invention;

[0026] Figure 2This is a depth domain construction diagram of the target region applicable according to an embodiment of the present invention;

[0027] Figure 3 This is a flowchart of another preferred method for constructing a trap according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the blind well velocity error of the target formation to which this invention is applicable;

[0029] Figure 5 This is a schematic diagram of a preferred device for constructing a closed loop according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of an electronic device that implements the preferred method for constructing a closed loop according to an embodiment of the present invention. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," "third," "fourth," "fifth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] Example 1

[0034] Figure 1This is a flowchart of a preferred method for constructing a trap according to an embodiment of the present invention. This embodiment is applicable to the situation of evaluating the reliability of low-amplitude constructed traps. The method can be executed by a preferred device for constructing a trap. The preferred device for constructing a trap can be implemented in hardware and / or software. The preferred device for constructing a trap can be configured in any electronic device with network communication function.

[0035] like Figure 1 As shown, the preferred method for constructing a closed loop according to the present invention includes the following process:

[0036] S110. Determine the depth domain structural map of the target area, and determine multiple target structural traps of each target stratum corresponding to the target area based on the depth domain structural map. The depth domain structural map is obtained by performing time-depth conversion on the optimal velocity field. The optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area.

[0037] The depth domain structural map includes depth domain structural maps of multiple target strata. The depth domain structural map can clearly reflect the boundary range and structural high points of different structural traps. For example, ... Figure 2 As shown, mapping using "small grids and small contour line intervals" has a minimal smoothing effect and can more clearly reflect the boundaries of closed areas and structural high points. Figure 2 The identified traps are mostly small-scale structural traps with small area and low structural amplitude.

[0038] Specifically, determining the depth mapping of the target region may include steps A1-A4:

[0039] Step A1: Perform quality control and correction on the root mean square velocity spectrum and well calibration average velocity of the target area.

[0040] Specifically, the root mean square velocity (RMS) of each CMP point on each survey line in the RMS velocity spectrum is checked to ensure consistent trends, and outliers are removed and edited. The time-depth relationship of the single-well VSP velocity curve quality control synthetic record calibration is converted into average velocity-depth scatter plots and layer velocity-depth scatter plots, which are then compared with the average velocity and layer velocity of the VSP, respectively. Multi-well velocity cross-plot analysis of the quality control well calibration velocity displays the time-depth relationship of all well synthetic records within the target area. Based on the consistency characteristics of the curves, the accuracy of the time-depth relationship in the quality control well calibration is ensured, thereby guaranteeing the accuracy of the well calibration average velocity.

[0041] Step A2: Calculate the initial average velocity field using the root mean square velocity spectrum.

[0042] Specifically, using the Dix formula, the root mean square velocity spectrum scatter points are converted into average velocity scatter points, and then the initial average velocity field is obtained by iterative interpolation through partial differential equations.

[0043] Step A3: Determine the error value between the well calibration average velocity and the initial average velocity corresponding to each geological layer at the well point, and then interpolate through the constraints of the layer frame to obtain the average velocity error volume.

[0044] Specifically, firstly, well-seismic calibration is performed on the wells in the target area, the obtained time-depth curves are converted into time-velocity curves, and the average velocity value corresponding to each geological layer at the well point is extracted. Then, the error value between the calibration average velocity and the seismic velocity corresponding to each geological layer at the well point is calculated. Then, a layered framework model is established using seismic layer data, and the velocity error value is interpolated using the layered model in space to obtain the spatially variable average velocity error volume.

[0045] Step A4: Correct the initial average velocity field using the average velocity error volume and constraint layer to obtain the optimal velocity field, and obtain the depth domain construction map by performing time-depth transformation on the optimal velocity field.

[0046] Specifically, the initial average velocity field obtained by the dix formula is merged with the average velocity error volume. The specific method is to add the velocity values ​​of the two in space to obtain the optimal velocity field that is more consistent with the well point velocity. Then, the depth domain construction map is obtained by performing time-depth conversion on the optimal velocity field.

[0047] S120. Obtain the well calibration average velocity and root mean square velocity spectrum of the target area corresponding to a preset number of target wells. Construct the blind well velocity field of the target area based on the well calibration average velocity and root mean square velocity spectrum of the target wells. The preset number is less than the number of all wells in the target area.

[0048] Specifically, the well calibration average velocity and root mean square velocity spectrum of a predetermined number of target wells in the target area are determined. Using the dix formula, the scatter points of the root mean square velocity spectrum are converted into average velocity scatter points. Then, the initial average velocity field is obtained by iterative interpolation using partial differential equations. This initial average velocity field is consistent with the initial average velocity field in S110. The error value between the well calibration average velocity and the initial average velocity at each geological stratum at the predetermined number of target wells is determined. Then, interpolation is performed using the constraints of the layer frame to obtain the target average velocity error volume. The target average velocity error volume and the constrained layer are used to correct the initial average velocity field to obtain the blind well velocity field of the target area.

[0049] S130. Based on the blind well velocity field and the target formation of the target structural trap, determine the first velocity corresponding to the target structural trap, and based on the optimal velocity field and the target formation of the target structural trap, determine the second velocity corresponding to the target structural trap; the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity corresponding to the target formation of the target structural trap determined in the optimal velocity field.

[0050] Specifically, the blind well velocity field and the optimal velocity field can be understood as the set of average velocities corresponding to different formations. Therefore, the target formation of the target structural trap can be found in the blind well velocity field, and the target formation of the target structural trap can be found in the optimal velocity field. Based on the blind well velocity field and the target formation of the target structural trap, the first velocity corresponding to the target structural trap can be accurately determined, and based on the optimal velocity field and the target formation of the target structural trap, the second velocity corresponding to the target structural trap can be accurately determined.

[0051] S140. Based on the first velocity and the second velocity, predict the burial depth error of the target trap. The burial depth error has a one-to-one correspondence with the first velocity and the second velocity. The burial depth error is used to describe the degree of error in the depth of the trap.

[0052] Specifically, there is a one-to-one correspondence between the burial depth error and the first velocity and the second velocity. Therefore, after obtaining the first velocity and the second velocity of the target structural trap, the burial depth error of the corresponding target structural trap can be queried according to the correspondence.

[0053] Optionally, determining the burial depth error of the target trap based on the first velocity and the second velocity includes: using the difference between the first velocity and the second velocity as the velocity error of the target trap; for example, such as Figure 4 As shown, this blind well is Figure 2 In the A10 data, from the perspective of error plane trends, the error is smaller in areas with high well control and larger in sparse well areas. The velocity error at blind wells is larger than that at constrained wells. Further, the travel time of the target structural trap is obtained, and the burial depth error of the target structural trap is determined based on the travel time and velocity error. The burial depth error of the target structural trap is expressed by the following formula:

[0054] ΔH=1 / 2(V p -V t )*T;

[0055] In the formula, ΔH represents the burial depth error of the target trap, and V p As the first velocity, V t Let T be the second velocity, and T be the travel time for constructing the target loop.

[0056] The more well points involved in the velocity field calculation and the more uniform their distribution, the closer the obtained velocity field will be to the actual formation velocity. Therefore, compared with the blind well velocity field, the optimal velocity field is closer to the actual formation velocity. To characterize the velocity error in the low-well-controlled area, based on the characteristics of the velocity field, the blind well velocity field can be equivalent to the pre-drilling predicted velocity, and the optimal velocity field can be equivalent to the post-drilling actual velocity. ΔH can be obtained at the high point of the trap according to the calculation formula of the burial depth error of the target structural trap.

[0057] S150. Based on the burial depth error of the target structural trap and a preset threshold, determine the comparison result of the target structural trap. Based on the comparison result of each target structural trap, determine the drilling sequence of multiple target structural traps. The drilling sequence is used to describe the order in which the target structural traps are drilled.

[0058] The preset threshold can be zero.

[0059] Specifically, the comparison results can be: the burial depth error of the target structural trap is greater than the preset threshold, the burial depth error of the target structural trap is less than the preset threshold, and the burial depth error of the target structural trap is equal to the preset threshold. Different comparison results correspond to a drilling sequence, that is, the comparison results and the drilling sequence have a certain correspondence. Therefore, after determining the comparison results of each target structural trap, the drilling sequence of multiple target structural traps can be accurately determined according to the correspondence.

[0060] In the technical solution of this invention, the optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area. The depth domain structural map is obtained by time-depth conversion of the optimal velocity field. After determining the depth domain structural map of the target area, multiple target structural traps in the target area are determined based on the target formation depth domain structural map, achieving accurate identification of structural traps. Furthermore, a preset number less than the number of all wells in the target area is used to obtain the well calibration average velocity corresponding to a preset number of target wells in the target area and the root mean square velocity spectrum of the target area. Based on the well calibration average velocity and root mean square velocity spectrum of the target wells, a blind well velocity field of the target area is constructed, achieving accurate construction of the blind well velocity field, so as to facilitate subsequent error comparison between the blind well velocity field and the optimal velocity field. That is, the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity determined in the optimal velocity field. The average velocity corresponding to the target formation of the target structural trap is determined. Based on the blind well velocity field and the target formation of the target structural trap, the first velocity corresponding to the target structural trap is determined. Based on the optimal velocity field and the target formation of the target structural trap, the second velocity corresponding to the target structural trap is determined. Since the burial depth error has a one-to-one correspondence with the first and second velocities, and the burial depth error is used to describe the degree of error in the depth of the structural trap, the burial depth error of the target structural trap can be accurately predicted based on the first and second velocities. The comparison result of the target structural trap is determined based on the burial depth error of the target structural trap and a preset threshold. Based on the comparison result of each target structural trap, the drilling sequence of multiple target structural traps is determined to describe the order in which the target structural traps are drilled. This solves the problem of the depth error of the structural trap affecting the accuracy of the optimal structural trap, avoids the impact of velocity field errors on exploration, reduces exploration risks, and improves the success rate of exploration targets.

[0061] Example 2

[0062] Figure 3 This is a flowchart of another preferred method for constructing a trap provided by an embodiment of the present invention. The technical solution of this embodiment further optimizes the process of S140 in the above embodiments based on the above embodiments. This embodiment can be combined with various optional solutions in one or more of the above embodiments.

[0063] like Figure 3 As shown, the preferred method for constructing a closed loop according to the present invention includes:

[0064] S210. Determine the depth domain structural map of the target area, and determine multiple target structural traps of each target stratum corresponding to the target area based on the depth domain structural map. The depth domain structural map is obtained by performing time-depth conversion on the optimal velocity field. The optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area.

[0065] S220. Obtain the well calibration average velocity and root mean square velocity spectrum of the target area corresponding to a preset number of target wells. Construct the blind well velocity field of the target area based on the well calibration average velocity and root mean square velocity spectrum of the target wells. The preset number is less than the number of all wells in the target area.

[0066] S230. Based on the blind well velocity field and the target formation of the target structural trap, determine the first velocity corresponding to the target structural trap, and based on the optimal velocity field and the target formation of the target structural trap, determine the second velocity corresponding to the target structural trap; the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity corresponding to the target formation of the target structural trap determined in the optimal velocity field.

[0067] S240. Based on the first velocity and the second velocity, predict the burial depth error of the target trap. The burial depth error has a one-to-one correspondence with the first velocity and the second velocity. The burial depth error is used to describe the degree of error in the depth of the trap.

[0068] S250. Based on the burial depth error of the target structural trap and a preset threshold, determine the comparison result of the target structural trap. Based on the comparison result of each target structural trap, determine the drilling sequence of multiple target structural traps. The comparison result includes the first comparison result, the second comparison result, and the third comparison result.

[0069] The preset threshold can be zero.

[0070] Specifically, determining the comparison result of the target structural trap based on the burial depth error of the target structural trap and a preset threshold includes: if the burial depth error of the target structural trap is equal to the preset threshold, determining the comparison result of the target structural trap as the first comparison result; the first comparison result is used to reflect that the actual drilling depth of the target structural trap is consistent with the burial depth of the target structural trap; if the burial depth error of the target structural trap is greater than the preset threshold, determining the comparison result of the target structural trap as the second comparison result; the second comparison result is used to reflect that the burial depth of the target structural trap is less than the actual drilling depth of the target structural trap; if the burial depth error of the target structural trap is less than the preset threshold, determining the comparison result of the target structural trap as the third comparison result; the third comparison result is used to reflect that the burial depth of the target structural trap is greater than the actual drilling depth of the target structural trap.

[0071] Further, determining the drilling order of multiple target structural traps based on the comparison result of each target structural trap includes: taking the target structural trap corresponding to the first comparison result as the first reference structural trap, taking the target structural trap corresponding to the second comparison result as the second reference structural trap, and taking the target structural trap corresponding to the third comparison result as the third reference structural trap; taking the arrangement order of the first reference structural trap, the third reference structural trap, and the second reference structural trap as the drilling order of multiple target structural traps.

[0072] Exemplarily, the formula for the burial depth error of the target structural trap is: ΔH = 1 / 2(V p -V t )*T; ΔH is the burial depth error of the target structural trap, V p is the first velocity, V t is the second velocity, and T is the travel time of the target structural trap. According to the calculation of the formula for the burial depth error of the target structural trap, there are the following three cases:

[0073] (1) When Vp = Vt, ΔH = 0. At this time, the first comparison result can be obtained, that is, the burial depth of the predicted structural trap high point is equal to the actual drilling depth, and the structural trap will be drilled as scheduled;

[0074] (2) When Vp < Vt, ΔH < 0. At this time, the third comparison result can be obtained, that is, the burial depth of the predicted structural trap is less than the actual drilling depth, and deeper drilling is required to drill the trap;

[0075] (3) When Vp > Vt, ΔH > 0. At this time, the second comparison result can be obtained, that is, the predicted structural burial depth is greater than the actual drilling depth, indicating that the target layer trap is encountered in advance.

[0076] According to the above three cases, the drilling order of multiple target structural traps is: (1) > (3) > (2).

[0077] S260. Determine the comparison result of the target structural trap based on the burial depth error of the target structural trap and a preset threshold, and determine the drilling order of multiple target structural traps based on the comparison result of each target structural trap. The comparison result includes the first comparison result, the second comparison result, the first type of the third comparison result, and the second type of the third comparison result.

[0078] Among them, the preset threshold can be zero.

[0079] Specifically, after determining that the comparison result of the target structural trap is the third comparison result, the method further includes: if the burial depth error of the target structural trap is less than the amplitude of the target structural trap, determine that the third comparison result of the target structural trap is the first type; the first type is used to describe that the burial depth high point of the target structural trap is within the burial depth range of the reference structural trap, and the reference structural trap is the actual structural trap corresponding to the target structural trap; if the burial depth error of the target structural trap is greater than the amplitude of the target structural trap, determine that the third comparison result of the target structural trap is the second type; the second type is used to describe that the burial depth of the target structural trap exceeds the burial depth range of the reference structural trap.

[0080] Further, determining the drilling order of multiple target structural traps based on the comparison result of each target structural trap includes: regarding the target structural trap corresponding to the first comparison result as the first reference structural trap, regarding the target structural trap corresponding to the second comparison result as the second reference structural trap, regarding the target structural trap corresponding to the first type of the third comparison result as the fourth reference structural trap; regarding the target structural trap corresponding to the second type of the third comparison result as the fifth reference structural trap; regarding the arrangement order of the first reference structural trap, the fourth reference structural trap, the fifth reference structural trap, and the second reference structural trap as the drilling order of multiple target structural traps.

[0081] Exemplarily, according to the relationship between the burial depth error of the trap and the trap amplitude, the third comparison result can be divided into the first type (3-1) and the second type (3-2):

[0082] (3-1) When ΔH < R, it is predicted that the trap high point is within the true trap range;

[0083] (3-2) When ΔH > R, it is predicted that the trap burial depth has exceeded the true trap burial depth range.

[0084] Taking all the above situations into consideration, the drilling order of multiple target structural traps can be: (1) > (3-1) > (3-2) > (2).

[0085] The technical solution of this invention involves determining a depth domain structural map of a target area, and then determining multiple target structural traps corresponding to each target formation in the target area based on the depth domain structural map. The depth domain structural map is obtained by performing a time-depth conversion on an optimal velocity field, which is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area. A preset number of well calibration average velocities and root mean square velocity spectra of the target area are obtained, and a blind well velocity field of the target area is constructed based on the well calibration average velocities and root mean square velocity spectra of the target wells. The preset number is less than the number of all wells in the target area. Based on the blind well velocity field and the target formation of the target structural trap, a first velocity corresponding to the target structural trap is determined, and based on the optimal velocity field and the target formation of the target structural trap, a second velocity corresponding to the target structural trap is determined. The first velocity is the target velocity of the target structural trap determined in the blind well velocity field. The first velocity is the average velocity corresponding to the first layer, and the second velocity is the average velocity corresponding to the target stratum of the target structural trap determined in the optimal velocity field. The burial depth error of the target structural trap is predicted based on the first and second velocities. The burial depth error has a one-to-one correspondence with the first and second velocities and is used to describe the degree of error in the depth of the structural trap. The comparison results of the target structural trap are determined based on the burial depth error of the target structural trap and a preset threshold. The comparison results include a first comparison result, a second comparison result, and a third comparison result, or the comparison results include a first type of the first comparison result, a second comparison result, a third comparison result, and a second type of the third comparison result. That is, the drilling sequence of multiple target structural traps can be accurately determined by distinguishing the comparison results, solving the problem of the depth error of the structural trap affecting the accuracy of the selected structural trap, avoiding the impact of velocity field errors on exploration, reducing exploration risks, and improving the success rate of exploration targets.

[0086] Example 3

[0087] Figure 5 This is a schematic diagram of a preferred device for constructing a trap according to an embodiment of the present invention. This embodiment is applicable to the evaluation of the reliability of low-amplitude trap construction. The preferred device for constructing a trap can be implemented in hardware and / or software and can be configured in any electronic device with network communication function.

[0088] like Figure 5 As shown, the preferred means for constructing a closed loop according to the present invention includes:

[0089] The trap identification module 310 is used to determine the depth domain structural map of the target area, and to determine multiple target structural traps of each target stratum corresponding to the target area based on the depth domain structural map; the depth domain structural map includes depth domain structural maps of multiple target strata, and the depth domain structural map is obtained by performing time-depth conversion on the optimal velocity field, and the optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area.

[0090] The velocity field determination module 320 is used to obtain the well calibration average velocity corresponding to a preset number of target wells in the target area and the root mean square velocity spectrum of the target area, and to construct the blind well velocity field of the target area based on the well calibration average velocity and root mean square velocity spectrum of the target wells; the preset number is less than the number of all wells in the target area;

[0091] The velocity determination module 330 is used to determine a first velocity corresponding to the target structural trap based on the blind well velocity field and the target formation of the target structural trap, and to determine a second velocity corresponding to the target structural trap based on the optimal velocity field and the target formation of the target structural trap; the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity corresponding to the target formation of the target structural trap determined in the optimal velocity field;

[0092] The burial depth error prediction module 340 is used to predict the burial depth error of the target construction trap based on the first velocity and the second velocity. The burial depth error has a one-to-one correspondence with the first velocity and the second velocity. The burial depth error is used to describe the degree of error in the depth of the construction trap.

[0093] The preferred module is used to determine the comparison result of the target structural trap based on the burial depth error of the target structural trap and a preset threshold, and to determine the drilling sequence of multiple target structural traps based on the comparison result of each target structural trap. The drilling sequence is used to describe the order in which the target structural traps are drilled.

[0094] Based on the above embodiments, optionally, the burial depth error determination module is used to: use the difference between the first velocity and the second velocity as the velocity error of the target structural trap; obtain the travel time of the target structural trap; and determine the burial depth error of the target structural trap based on the travel time of the target structural trap and the velocity error; correspondingly, the burial depth error of the target structural trap is expressed by the following formula:

[0095] ΔH=1 / 2(V p -V t )*T;

[0096] In the formula, ΔH is the burial depth error of the target trap, and V p As the first velocity, V t Let T be the second velocity, and T be the travel time for constructing the target loop.

[0097] Based on the above embodiments, optionally, the preferred module includes a first comparison result determination unit, which is used to: determine the comparison result of the target structural trap as a first comparison result if the burial depth error of the target structural trap is equal to the preset threshold; the first comparison result is used to reflect that the actual drilling depth of the target structural trap is consistent with the burial depth of the target structural trap; if the burial depth error of the target structural trap is less than the preset threshold, determine the comparison result of the target structural trap as a second comparison result; the second comparison result is used to reflect that the burial depth of the target structural trap is less than the actual drilling depth of the target structural trap; if the burial depth error of the target structural trap is greater than the preset threshold, determine the comparison result of the target structural trap as a third comparison result; the third comparison result is used to reflect that the burial depth of the target structural trap is greater than the actual drilling depth of the target structural trap.

[0098] Based on the above embodiments, optionally, the preferred module includes a second comparison result determination unit, which is used to: determine the third comparison result of the target structural trap as a first type if the burial depth error of the target structural trap is less than the amplitude of the target structural trap; the first type is used to describe that the burial depth high point of the target structural trap is within the burial depth range of a reference structural trap, where the reference structural trap is the actual structural trap corresponding to the target structural trap; and determine the third comparison result of the target structural trap as a second type if the burial depth error of the target structural trap is greater than the amplitude of the target structural trap; the second type is used to describe that the burial depth of the target structural trap exceeds the burial depth range of the reference structural trap.

[0099] Based on the above embodiments, optionally, the comparison results include a first comparison result, a second comparison result, and a third comparison result. The preferred module includes a first preferred unit, which is the same as: taking the target structural trap corresponding to the first comparison result as a first reference structural trap, taking the target structural trap corresponding to the second comparison result as a second reference structural trap, and taking the target structural trap corresponding to the third comparison result as a third reference structural trap; and taking the arrangement order of the first reference structural trap, the third reference structural trap, and the second reference structural trap as the drilling order of multiple target structural traps.

[0100] Based on the above embodiments, optionally, the comparison results include a first comparison result, a second comparison result, a first type of a third comparison result, and a second type of a third comparison result. The preferred module includes a first preferred unit, which is the same as: taking the target structural trap corresponding to the first comparison result as a first reference structural trap, taking the target structural trap corresponding to the second comparison result as a second reference structural trap, taking the target structural trap corresponding to the first type of the third comparison result as a fourth reference structural trap, taking the target structural trap corresponding to the second type of the third comparison result as a fifth reference structural trap, and taking the arrangement order of the first reference structural trap, the fourth reference structural trap, the fifth reference structural trap, and the second reference structural trap as the drilling order of the multiple target structural traps.

[0101] The preferred apparatus for constructing a trap provided in the embodiments of the present invention can execute the preferred method for constructing a trap provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method execution.

[0102] Example 4

[0103] According to embodiments of this disclosure, this disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0104] Figure 6 A schematic diagram of an electronic device is shown, illustrating a preferred method for implementing the structural enclosure of embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0105] like Figure 6As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0106] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0107] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the preferred method of constructing a loop.

[0108] In some embodiments, the preferred method for constructing a trap may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or mounted on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the preferred method for constructing a trap described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the preferred method for constructing a trap by any other suitable means (e.g., by means of firmware).

[0109] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0110] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0111] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0112] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0113] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0114] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0115] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0116] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A preferred method for constructing a trap, characterized in that, The method includes: A depth domain structural map of the target area is determined, and multiple target structural traps of each target stratum corresponding to the target area are determined based on the depth domain structural map. The depth domain structural map includes depth domain structural maps of multiple target strata. The depth domain structural map is obtained by performing time-depth conversion on the optimal velocity field. The optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area. Obtain the well calibration average velocity and root mean square velocity spectrum of a predetermined number of target wells in the target area; construct the blind well velocity field of the target area based on the well calibration average velocity and root mean square velocity spectrum of the target wells; the predetermined number is less than the total number of wells in the target area; Based on the blind well velocity field and the target formation of the target structural trap, a first velocity corresponding to the target structural trap is determined, and based on the optimal velocity field and the target formation of the target structural trap, a second velocity corresponding to the target structural trap is determined; the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity corresponding to the target formation of the target structural trap determined in the optimal velocity field. The burial depth error of the target trap is predicted based on the first velocity and the second velocity. The burial depth error has a one-to-one correspondence with the first velocity and the second velocity. The burial depth error is used to describe the degree of error in the depth of the trap. The comparison results of the target structural traps are determined based on the burial depth error of the target structural traps and a preset threshold. The drilling sequence of multiple target structural traps is determined based on the comparison results of each target structural trap. The drilling sequence is used to describe the order in which the target structural traps are drilled.

2. The method according to claim 1, characterized in that, Predicting the burial depth error of the target trap based on the first velocity and the second velocity includes: The difference between the first speed and the second speed is used as the speed error for constructing the target loop; The travel time of the target structural trap is obtained, and the burial depth error of the target structural trap is determined based on the travel time of the target structural trap and the velocity error. Accordingly, the burial depth error of the target structure trap is expressed by the following formula: ΔH = 1 / 2 (V p - V t ) * T; where ΔH is the depth error of the target structural trap, V p is the first velocity, V t is the second velocity, and T is the travel time of the target structural trap.

3. The method according to claim 1, characterized in that, The comparison result of determining the target constructed trap based on the burial depth error of the target constructed trap and a preset threshold includes: If the burial depth error of the target structural trap is equal to the preset threshold, then the comparison result of the target structural trap is determined as the first comparison result; the first comparison result is used to reflect that the actual drilling depth of the target structural trap is consistent with the burial depth of the target structural trap. If the burial depth error of the target structural trap is less than the preset threshold, then the comparison result of the target structural trap is determined as the second comparison result; the second comparison result is used to reflect that the burial depth of the target structural trap is less than the actual drilling depth of the target structural trap. If the burial depth error of the target structural trap is greater than the preset threshold, then the comparison result of the target structural trap is determined as the third comparison result; the third comparison result is used to reflect that the burial depth of the target structural trap is greater than the actual drilling depth of the target structural trap.

4. The method according to claim 3, characterized in that, After determining the comparison result of the target structure trap as the third comparison result, the method further includes: If the burial depth error of the target structural trap is less than the amplitude of the target structural trap, then the third comparison result of the target structural trap is determined to be of the first type; the first type is used to describe that the burial depth high point of the target structural trap is within the burial depth range of the reference structural trap, and the reference structural trap is the actual structural trap corresponding to the target structural trap. If the burial depth error of the target structural trap is greater than the amplitude of the target structural trap, then the third comparison result of the target structural trap is determined to be of the second type; the second type is used to describe that the burial depth of the target structural trap exceeds the burial depth range of the reference structural trap.

5. The method according to claim 3, characterized in that, The comparison results include a first comparison result, a second comparison result, and a third comparison result. Based on the comparison results for each target structural trap, the drilling sequence of multiple target structural traps is determined, including: The target structural trap corresponding to the first comparison result is used as the first reference structural trap, the target structural trap corresponding to the second comparison result is used as the second reference structural trap, and the target structural trap corresponding to the third comparison result is used as the third reference structural trap. The order of the first reference structural trap, the third reference structural trap, and the second reference structural trap is used as the drilling order for multiple target structural traps.

6. The method according to claim 4, characterized in that, The comparison results include a first comparison result, a second comparison result, a first type of a third comparison result, and a second type of a third comparison result. Based on the comparison results for each target structural trap, the drilling sequence of multiple target structural traps is determined, including: The target structural trap corresponding to the first comparison result is taken as the first reference structural trap, the target structural trap corresponding to the second comparison result is taken as the second reference structural trap, the target structural trap corresponding to the first type of the third comparison result is taken as the fourth reference structural trap, and the target structural trap corresponding to the second type of the third comparison result is taken as the fifth reference structural trap. The order of the first reference structural trap, the fourth reference structural trap, the fifth reference structural trap, and the second reference structural trap is used as the drilling order for multiple target structural traps.

7. The method according to claim 1 or 3, characterized in that, The preset threshold is zero.

8. A preferred apparatus for constructing a closed loop, characterized in that, The device includes: A trap identification module is used to determine the depth domain structural map of a target area, and to determine multiple target structural traps of each target stratum corresponding to the target area based on the depth domain structural map. The depth domain structural map includes depth domain structural maps of multiple target strata. The depth domain structural map is obtained by performing time-depth conversion on the optimal velocity field. The optimal velocity field is determined by the well calibration average velocity corresponding to all wells in the target area and the root mean square velocity spectrum of the target area. The velocity field determination module is used to obtain the well calibration average velocity corresponding to a preset number of target wells in the target area and the root mean square velocity spectrum of the target area, and to construct the blind well velocity field of the target area based on the well calibration average velocity and root mean square velocity spectrum of the target wells; the preset number is less than the number of all wells in the target area; A velocity determination module is used to determine a first velocity corresponding to the target structural trap based on the blind well velocity field and the target formation of the target structural trap, and to determine a second velocity corresponding to the target structural trap based on the optimal velocity field and the target formation of the target structural trap; the first velocity is the average velocity corresponding to the target formation of the target structural trap determined in the blind well velocity field, and the second velocity is the average velocity corresponding to the target formation of the target structural trap determined in the optimal velocity field; The burial depth error prediction module is used to determine the burial depth error of the target construction trap based on the first velocity and the second velocity. The burial depth error has a one-to-one correspondence with the first velocity and the second velocity, and the burial depth error is used to describe the degree of error in the depth of the construction trap. The preferred module is used to determine the comparison result of the target structural trap based on the burial depth error of the target structural trap and a preset threshold, and to determine the drilling sequence of multiple target structural traps based on the comparison result of each target structural trap. The drilling sequence is used to describe the order in which the target structural traps are drilled.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor to enable the at least one processor to perform the preferred method for constructing a trap as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the preferred method for constructing a trap as described in any one of claims 1-7.

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