A method and device for determining the dip of subsurface structures based on three-dimensional seismic data

Abstract

The application relates to the field of geophysical exploration, and discloses a method and device for determining the dip angle of an underground structure based on three-dimensional seismic data. The method comprises the following steps: determining a first apparent dip angle of a main survey line direction and a second apparent dip angle of a connecting line direction at a target position in three-dimensional seismic imaging data; and determining a true dip angle of a stratum at the target position by a preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle. First, three-dimensional seismic imaging data is obtained through conventional seismic data processing, then the three-dimensional seismic imaging data is scanned along the main survey line and the connecting line directions respectively to obtain the apparent dip angles of the two directions, and then the true dip angle information of the underground structure is obtained by converting the apparent dip angles of the main survey line and the connecting line directions based on an angle conversion model, and the dip angle extraction of all sampling points in a three-dimensional work area is completed. The extracted apparent dip angle information of the main survey line and the connecting line slope information has the advantages of high stability and high signal-to-noise ratio.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geophysical exploration, in particular to a method and device for determining the dip angle of an underground structure based on three-dimensional seismic data, a storage medium and an electronic device. BACKGROUND

[0002] The purpose of the background description provided herein is to generally present the context of the application. The statements described herein are not necessarily prior art, and are not necessarily made to the prior art.

[0003] At present, with the continuous deepening of oil and gas exploration, non-layered oil and gas reservoirs have become one of the main exploration targets. In this case, many seismic data processing algorithms based on the assumption of stratification are no longer applicable, and the introduction of the true dip angle of the underground formation is the key to the development of new theories, new methods and new technologies. The true dip angle of the three-dimensional seismic data underground structure is the key to the technical research in this regard.

[0004] On the other hand, for seismic data interpretation, the acquisition of the dip angle of the underground structure can better understand the shape of the underground structure and achieve more detailed structural interpretation, thereby guiding the fracture orientation and completing the oil reservoir prediction. Therefore, the acquisition of the true dip angle of the underground structure is crucial for seismic data processing and interpretation.

[0005] The conventional extraction of the true dip angle of the underground structure is usually based on logging data directly observed in the well by using equipment, and the formation dip angle logging instrument is used to directly obtain the strike, tendency and dip angle information of the formation. This method can meet the requirements when applied in the logging field. However, for the geophysical prospecting field, this method can only obtain the dip angle information of the formation at the wellhead position, and cannot obtain the three-dimensional dip angle information of the entire work area underground. Usually, the dip angle of the wellhead position can only be extrapolated along the structure, and this method will cause the extraction accuracy of the dip angle to decrease rapidly with the increase of the distance from the wellhead.

[0006] Therefore, there is an urgent need for a new method for determining the dip angle of the underground structure to solve the above-mentioned defects. SUMMARY

[0007] In view of the above problems, the present application provides a method and device for determining the dip angle of an underground structure based on three-dimensional seismic data, a storage medium and an electronic device.

[0008] In a first aspect, the present application provides a method for determining the dip angle of an underground structure based on three-dimensional seismic data, the method comprising:

[0009] determining a first apparent dip angle of a main survey line direction and a second apparent dip angle of a connecting line direction at a target position in a three-dimensional seismic imaging data volume;

[0010] According to the first apparent dip angle and the second apparent dip angle, a preset dip angle determination model is used to determine the true dip angle of the stratum at the target position.

[0011] Further, the method further comprises:

[0012] traversing the value of each imaging data sampling point in the seismic three-dimensional imaging data volume;

[0013] According to the first apparent dip angle and the second apparent dip angle, a preset dip angle determination model is used to determine the true dip angle of the stratum at each imaging data sampling point, so as to obtain the azimuth information corresponding to the seismic three-dimensional imaging data volume.

[0014] Further, the method further comprises:

[0015] The true dip angle of the stratum is converted by using a preset angle conversion model to obtain the radian information at the underground target position; wherein the preset angle conversion model comprises:

[0016]

[0017] wherein θ(i,j,k) is the true dip angle of the stratum, is the radian corresponding to the true dip angle of the stratum.

[0018] Further, in the case that the first apparent dip angle and the second apparent dip angle are both not less than a preset threshold, the preset dip angle determination model comprises:

[0019]

[0020] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0021] Further, in the case that the first apparent dip angle is less than a preset threshold and the second apparent dip angle is not less than a preset threshold, the preset dip angle determination model comprises:

[0022]

[0023] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0024] Further, in the case that the first apparent dip angle and the second apparent dip angle are both less than a preset threshold, the preset dip angle determination model comprises:

[0025]

[0026] wherein, ε is a stability factor, θ x (i,j,k) is a first apparent dip angle, θ y (i,j,k) is a second apparent dip angle.

[0027] Further, in the case that the first apparent dip angle is not less than a preset threshold and the second apparent dip angle is less than the preset threshold, the preset dip angle determination model comprises:

[0028]

[0029] wherein, ε is a stability factor, θ x (i,j,k) is a first apparent dip angle, θ y (i,j,k) is a second apparent dip angle.

[0030] In a second aspect of the present application, a device for determining a dip angle of a subsurface structure based on three-dimensional seismic data is provided, the device comprising:

[0031] a dip angle determination module configured to determine a first apparent dip angle of a main survey line direction and a second apparent dip angle of a tie line direction at a target position in a three-dimensional seismic imaging data volume; and

[0032] a true dip angle determination module configured to determine a true dip angle of a formation at the target position based on the first apparent dip angle and the second apparent dip angle by using a preset dip angle determination model.

[0033] In a third aspect of the present application, a computer readable storage medium storing a computer program is provided, the computer program being executable by one or more processors to implement the steps of the method as described above.

[0034] In a fourth aspect of the present application, an electronic device is provided, comprising a memory and one or more processors, the memory storing a computer program, the memory and the one or more processors being communicatively connected, the computer program being executable by the one or more processors to implement the steps of the method as described above.

[0035] Compared with the prior art, the technical solution of the present application has the following advantages or beneficial effects:

[0036] The method for determining the dip angle of the underground structure based on the three-dimensional seismic data provided in the application first obtains the data information of the three-dimensional seismic imaging data body through the conventional seismic data processing, then scans the three-dimensional seismic imaging data along the main survey line and the connecting line direction respectively to obtain the apparent dip angles in the two directions, and then converts the apparent dip angles in the main survey line and the connecting line direction based on the angle conversion model provided in the application to obtain the true dip angle information of the underground structure, and further extracts the dip angles of all sampling points in the three-dimensional work area. The apparent dip angle information and the connecting line slope information extracted have high stability and high signal-to-noise ratio. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0038] In addition, it should be further pointed out that, for the convenience of description, only the parts related to the present disclosure are shown in the drawings. The drawings accompanying the specification form part of the application and are used to provide further understanding of the application. The schematic embodiments and their descriptions in the application are used to explain the application and do not constitute an improper limitation on the application. In the drawings:

[0039] Figure 1 A flow chart of a method for determining the dip angle of the underground structure based on the three-dimensional seismic data provided in the embodiments of the application;

[0040] Figure 2 A schematic diagram of the profile of the input seismic data body provided in the embodiments of the application;

[0041] Figure 3 A schematic diagram of the profile of the apparent dip angle corresponding to the main survey line direction provided in the embodiments of the application;

[0042] Figure 4 A schematic diagram of the profile of the apparent dip angle corresponding to the connecting line direction provided in the embodiments of the application;

[0043] Figure 5 A schematic diagram of the profile of the true dip angle of the underground structure calculated provided in the embodiments of the application;

[0044] Figure 6 A schematic diagram of the plane of the input seismic data body provided in the embodiments of the application;

[0045] Figure 7 A schematic diagram of the plane of the apparent dip angle corresponding to the main survey line direction provided in the embodiments of the application;

[0046] Figure 8 A visual dip angle plane diagram corresponding to a tie line direction provided for an embodiment of the present application;

[0047] Figure 9 A calculated underground structure true dip angle plane diagram provided for an embodiment of the present application;

[0048] Figure 10 A structural diagram of an underground structure dip angle determination device based on three-dimensional seismic data provided for an embodiment of the present application;

[0049] Figure 11 A connection block diagram of an electronic device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0050] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and embodiments, so that how the present application applies technical means to solve technical problems and achieves corresponding technical effects can be fully understood and implemented. The embodiments of the present application and each feature in the embodiments can be combined with each other on the premise of no conflict, and the formed technical solutions are all within the protection scope of the present application.

[0051] It should be clear that the embodiments described below are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0052] As known from the background, at present, with the continuous deepening of oil and gas exploration, non-layered oil and gas reservoirs have become one of the main exploration targets. In this case, many seismic data processing algorithms based on the assumption of stratification are no longer applicable, and it is crucial to introduce the true dip angle of the underground formation and develop new theories, methods and technologies aimed at it. For the technical research in this regard, it is crucial to obtain the true dip angle of the three-dimensional seismic data underground structure.

[0053] On the other hand, for seismic data interpretation, the acquisition of underground structure dip angle can better understand the underground structure pattern and achieve more detailed structural interpretation, thereby guiding the fracture orientation and completing the oil reservoir prediction work. Therefore, the acquisition of the true dip angle of the underground structure is crucial for seismic data processing and interpretation.

[0054] The conventional underground true dip angle extraction is usually based on the logging data, directly uses the equipment to observe in the well, directly obtains the strike, tendency and dip angle information of the formation by using the formation dip angle logging instrument, and can meet the requirements in the logging field. However, for the geophysical field, the method can only obtain the dip angle information of the formation at the wellhead position, cannot obtain all the three-dimensional dip angle information of the underground of the whole work area, and can only finally extrapolate the dip angle of the wellhead position along the structure, which can cause the extraction precision of the dip angle to rapidly decrease with the increase of the distance from the wellhead.

[0055] Therefore, the application discloses a method for determining the underground structure dip angle based on three-dimensional seismic data. The method first obtains the data information of the three-dimensional seismic imaging data body through conventional seismic data processing; then, the three-dimensional seismic imaging data is scanned along the main survey line and the connecting line direction respectively to obtain the apparent dip angles in the two directions, and then the angle conversion method provided in the application is used to convert the apparent dip angles in the main survey line and the connecting line to obtain the true dip angle information of the underground structure, and the dip angle extraction of all sampling points in the three-dimensional work area is completed.

[0056] Embodiment one

[0057] The embodiment provides a method for determining the underground structure dip angle based on three-dimensional seismic data, Figure 1 The flowchart of the method for determining the underground structure dip angle based on three-dimensional seismic data provided by the embodiment is shown in Figure 1 The method disclosed by the embodiment includes the following steps:

[0058] Step 110, determining the first apparent dip angle in the main survey line direction and the second apparent dip angle in the connecting line direction of the target position in the three-dimensional seismic imaging data body.

[0059] Step 120, determining the true dip angle of the formation at the target position by using a preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle.

[0060] As an example, the first apparent dip angle is represented by θ x (i,j,k), and the second apparent dip angle is represented by θ y (i,j,k).

[0061] In some embodiments, when the first apparent dip angle and the second apparent dip angle are both not less than a preset threshold value, the preset dip angle determination model includes:

[0062]

[0063] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, and θ y (i,j,k) is the second apparent dip angle.

[0064] In some embodiments, in the case that the first apparent dip angle is less than a preset threshold and the second apparent dip angle is not less than the preset threshold, the preset dip angle determination model comprises:

[0065]

[0066] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0067] In some embodiments, in the case that the first apparent dip angle and the second apparent dip angle are both less than a preset threshold, the preset dip angle determination model comprises:

[0068]

[0069] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0070] In some embodiments, in the case that the first apparent dip angle is not less than a preset threshold and the second apparent dip angle is less than the preset threshold, the preset dip angle determination model comprises:

[0071]

[0072] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0073] Optionally, the preset threshold can be set as 0.

[0074] As an example, first, the apparent dip angles of the main line direction and the connecting line direction are calculated based on the three-dimensional seismic imaging data volume, and the apparent dip angles are θ x (i,j,k) and θ y (i,j,k). Then, the dip angle θ(i,j,k) of the subsurface structure at the subsurface point (i,j,k) can be calculated according to the positive and negative classification of the apparent dip angles of the two directions, and in different cases, the following formulas can be used respectively:

[0075] (1) When θ x (i,j,k) ≥ 0 and θ y (i,j,k) ≥ 0, the true dip angle of the subsurface structure can be expressed as:

[0076]

[0077] wherein in formula (1): ε is a stability factor, and its value can be a small number, such as 0.001.

[0078] (2) when θ x (i,j,k)<0, θ y (i,j,k)≥0, the true dip angle of the subsurface structure can be expressed as:

[0079]

[0080] (3) when θ x (i,j,k)<0, θ y (i,j,k)<0, the true dip angle of the subsurface structure can be expressed as:

[0081]

[0082] (4) when θ x (i,j,k)≥0, θ y (i,j,k)<0, the true dip angle of the subsurface structure can be expressed as:

[0083]

[0084] In some embodiments, further comprising:

[0085] traversing the value of each imaging data sampling point in the seismic three-dimensional imaging data volume;

[0086] determining the true dip angle of the stratum at each imaging data sampling point according to the first apparent dip angle and the second apparent dip angle through a preset dip angle determination model, to obtain the azimuth information corresponding to the seismic three-dimensional imaging data volume.

[0087] Further, by traversing each imaging data sampling point in the three-dimensional seismic imaging data volume, the azimuth information corresponding to the entire data volume can be obtained.

[0088] Finally, by converting through a preset angle conversion model, the radian θ(i,j,k) obtained above can be converted into

[0089] As an example, further comprising:

[0090] converting the true dip angle of the stratum through a preset angle conversion model to obtain the radian information at the subsurface target position; wherein the preset angle conversion model comprises:

[0091]

[0092] wherein θ(i,j,k) is the true dip angle of the stratum, Corresponding to the true dip angle of the stratum.

[0093] According to the method provided by the embodiment, first, the information of the three-dimensional seismic imaging data body is obtained through conventional seismic data processing; then, the three-dimensional seismic imaging data is scanned along the main survey line and the connecting line direction respectively to obtain the apparent dip angles in the two directions, and then the angle conversion method provided by the patent is used to convert the apparent dip angles in the main survey line and the connecting line to obtain the true dip angle information of the underground structure, and the dip angle extraction of all sampling points in the three-dimensional work area is completed. Specifically, the method comprises the following steps: step 110, determining the first apparent dip angle in the main survey line direction and the second apparent dip angle in the connecting line direction of the target position in the three-dimensional seismic imaging data body; step 120, determining the true dip angle of the stratum at the target position through the preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle. The apparent dip angle information and the connecting line slope information extracted have the advantages of high stability and high signal-to-noise ratio.

[0094] Embodiment two

[0095] The embodiment is a specific example, and in the embodiment, the method for determining the dip angle of the underground structure based on the three-dimensional seismic data disclosed in the application is tested.

[0096] Specifically, the method comprises the following steps:

[0097] First step, determining the first apparent dip angle in the main survey line direction and the second apparent dip angle in the connecting line direction of the three-dimensional seismic imaging data body.

[0098] Optionally, the apparent dip angles in the main survey line direction and the connecting line direction calculated based on the three-dimensional seismic imaging data body are θ x (i,j,k) and θ y (i,j,k).

[0099] As an example, the first apparent dip angle is represented by θ x (i,j,k), and the second apparent dip angle is represented by θ y (i,j,k).

[0100] As shown in Figure 2 , it is the profile of the three-dimensional seismic imaging data body input in the embodiment, which is used to test the algorithm for extracting the true dip angle of the underground structure provided by the patent.

[0101] Further, the first apparent dip angle in the main survey line direction and the second apparent dip angle in the connecting line direction can refer to Figure 3 , Figure 4 and Figure 7 , Figure 8 . Among them, as Figure 3As shown, this is the apparent dip profile of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment; it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio. As shown in FIG. 4, this is the apparent dip plane of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment. From the plane, it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio. Figure 4 As shown, this is the apparent dip profile of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment; it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio. As shown in FIG. 4, this is the apparent dip plane of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment. From the plane, it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio. Figure 7 As shown, this is the apparent dip profile of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment; it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio. As shown in FIG. 4, this is the apparent dip plane of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment. From the plane, it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio. Figure 8 As shown, this is the apparent dip profile of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment; it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio. As shown in FIG. 4, this is the apparent dip plane of the main line direction calculated by the three-dimensional seismic imaging data body in the embodiment. From the plane, it can be seen that the extracted main line apparent dip information has high stability and signal-to-noise ratio.

[0102] In the second step, according to the first apparent dip and the second apparent dip, the true dip angle of the stratum at the target position is determined through a preset dip angle determination model.

[0103] In some embodiments, in the case that the first apparent dip and the second apparent dip are both not less than a preset threshold value, the preset dip angle determination model comprises:

[0104]

[0105] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip, θ y (i,j,k) is the second apparent dip.

[0106] In some embodiments, in the case that the first apparent dip is less than a preset threshold value and the second apparent dip is not less than a preset threshold value, the preset dip angle determination model comprises:

[0107]

[0108] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip, θ y (i,j,k) is the second apparent dip.

[0109] In some embodiments, in the case that the first apparent dip and the second apparent dip are both less than a preset threshold value, the preset dip angle determination model comprises:

[0110]

[0111] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip, θ y (i,j,k) is the second apparent dip.

[0112] In some embodiments, in the case that the first apparent dip angle is not less than a preset threshold value and the second apparent dip angle is less than the preset threshold value, the preset dip angle determination model comprises:

[0113]

[0114] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0115] Optionally, the preset threshold value can be set to 0.

[0116] As an example, first, the apparent dip angles of the main line direction and the connecting line direction are calculated based on the three-dimensional seismic imaging data volume to be θ x (i,j,k) and θ y (i,j,k), then the underground structure dip angle θ(i,j,k) at the underground point (i,j,k) can be calculated according to the positive and negative classification of the apparent dip angles of the two directions, and in different cases, it can be represented by the following formulas respectively:

[0117] (1) When θ x (i,j,k) ≥ 0, θ y (i,j,k) ≥ 0, the true dip angle of the underground structure can be represented as:

[0118]

[0119] In formula (1), ε is a stability factor, and its value can be a small number, such as 0.001.

[0120] (2) When θ x (i,j,k) < 0, θ y (i,j,k) ≥ 0, the true dip angle of the underground structure can be represented as:

[0121]

[0122] (3) When θ x (i,j,k) < 0, θ y (i,j,k) < 0, the true dip angle of the underground structure can be represented as:

[0123]

[0124] (4) When θ x (i,j,k) ≥ 0, θ y (i,j,k) < 0, the true dip angle of the underground structure can be represented as:

[0125]

[0126] In some embodiments, further comprising:

[0127] traversing the value of each imaging data sampling point in the seismic three-dimensional imaging data volume;

[0128] determining the stratum true dip angle at each imaging data sampling point by a preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle, to obtain the azimuth information corresponding to the seismic three-dimensional imaging data volume.

[0129] Further, by traversing each imaging data sampling point in the three-dimensional seismic imaging data volume, the azimuth information corresponding to the entire data volume can be obtained.

[0130] Finally, by converting through a preset angle conversion model, the radian θ(i,j,k) obtained in the foregoing can be converted into

[0131] Further, the underground structure true dip angle profile can refer to Figure 5 and Figure 9 . Among them, as shown in Figure 5 , it is the three-dimensional seismic imaging data volume corresponding to the underground structure true dip angle profile calculated based on the main line and the contact line apparent dip angle by using the method disclosed in the present application; it can be seen that the true dip angle calculation is stable, and there is no abnormal value, and the result is as expected. As shown in Figure 9 , it is the three-dimensional seismic imaging data volume corresponding to the underground structure true dip angle plane calculated based on the main line and the contact line apparent dip angle by using the method disclosed in the present application; from the plane, the underground structure true dip angle calculation is stable, and there is no abnormal value, and the result is as expected.

[0132] As shown in Figure 6 , this is the three-dimensional seismic imaging data volume plane input in the present embodiment, which is used to test the algorithm for extracting the underground structure true dip angle disclosed in the present application.

[0133] In some embodiments, further comprising:

[0134] converting the stratum true dip angle through a preset angle conversion model to obtain the radian information at the underground target position; wherein the preset angle conversion model comprises:

[0135]

[0136] wherein θ(i,j,k) is the stratum true dip angle, is the radian corresponding to the stratum true dip angle.

[0137] According to the method provided in the embodiment, firstly, the information of the three-dimensional seismic imaging data body is obtained through conventional seismic data processing; then, the three-dimensional seismic imaging data is scanned along the main survey line and the connecting line direction respectively to obtain the apparent dip angles in the two directions, and then the angle conversion method provided in the patent is used to convert the apparent dip angles in the main survey line and the connecting line to obtain the true dip angle information of the underground structure, and the dip angle extraction of all sampling points in the three-dimensional work area underground is completed. The stability of the extracted main survey line apparent dip angle information and the connecting line slope information is high, and the signal-to-noise ratio is also high. Specifically, the method comprises the following steps: step 110, determining a first apparent dip angle in a main survey line direction and a second apparent dip angle in a connecting line direction at a target position in a three-dimensional seismic imaging data body; and step 120, determining a true dip angle of a formation at the target position according to the first apparent dip angle and the second apparent dip angle by using a preset dip angle determination model. The method has the advantages of high stability of the extracted main survey line apparent dip angle information and the connecting line slope information, and high signal-to-noise ratio.

[0138] Embodiment three

[0139] The embodiment provides a device for determining the dip angle of an underground structure based on three-dimensional seismic data. The device embodiment can be used to execute the method embodiments of the present application. For details not disclosed in the device embodiment, please refer to the method embodiments of the present application. Figure 10 A structural diagram of a device for determining the dip angle of an underground structure based on three-dimensional seismic data provided in the embodiment of the present application is shown in Figure 10 The device 1000 disclosed in the embodiment comprises:

[0140] An apparent dip angle determination module 1001 is configured to determine a first apparent dip angle in a main survey line direction and a second apparent dip angle in a connecting line direction at a target position in a three-dimensional seismic imaging data body.

[0141] A formation true dip angle determination module 1002 is configured to determine a true dip angle of a formation at the target position according to the first apparent dip angle and the second apparent dip angle by using a preset dip angle determination model.

[0142] In some embodiments, the device further comprises a traversal unit and a determination unit, wherein

[0143] The traversal unit is configured to traverse the value of each imaging data sampling point in the three-dimensional seismic imaging data body.

[0144] The determination unit is configured to determine a true dip angle of a formation at each imaging data sampling point according to the first apparent dip angle and the second apparent dip angle by using a preset dip angle determination model, and obtain the azimuth information corresponding to the three-dimensional seismic imaging data body.

[0145] In some embodiments, further comprising a conversion module configured to convert the true dip angle of the stratum by a preset angle conversion model to obtain the radian information at the underground target position; wherein the preset angle conversion model comprises:

[0146]

[0147] wherein θ(i,j,k) is the true dip angle of the stratum, is the radian corresponding to the true dip angle of the stratum.

[0148] In some embodiments, in a case where the first apparent dip angle and the second apparent dip angle are both not less than a preset threshold, the preset dip angle determination model comprises:

[0149]

[0150] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0151] In some embodiments, in a case where the first apparent dip angle is less than a preset threshold and the second apparent dip angle is not less than a preset threshold, the preset dip angle determination model comprises:

[0152]

[0153] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0154] In some embodiments, in a case where the first apparent dip angle and the second apparent dip angle are both less than a preset threshold, the preset dip angle determination model comprises:

[0155]

[0156] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θ y (i,j,k) is the second apparent dip angle.

[0157] In some embodiments, in a case where the first apparent dip angle is not less than a preset threshold and the second apparent dip angle is less than a preset threshold, the preset dip angle determination model comprises:

[0158]

[0159] wherein ε is a stability factor, θ x (i,j,k) is the first apparent dip angle, θy (i,j,k) is a second apparent dip angle.

[0160] Those skilled in the art can understand that the structure shown in the foregoing embodiments is not a limitation to the device of the present application, and can include more or less modules / cells than the drawings, or combine certain modules / cells, or arrange different modules / cells. Figure 10 Those skilled in the art can understand that the structure shown in the foregoing embodiments is not a limitation to the device of the present application, and can include more or less modules / cells than the drawings, or combine certain modules / cells, or arrange different modules / cells.

[0161] Those skilled in the art should understand that the modules or steps of the present application described above can be realized by a general computing device, which can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Alternatively, they can be realized by program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described can be executed in an order different from here, or they can be manufactured into individual integrated circuit modules, or multiple modules or steps among them can be manufactured into a single integrated circuit module.

[0162] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of each module in the device for determining the underground structure dip angle based on three-dimensional seismic data can refer to the corresponding process in the foregoing method embodiments, and the present embodiment will not be repeated here.

[0163] According to the device provided in the present embodiment, the true dip angle information of the underground structure can be obtained by converting the apparent dip angle of the main survey line and the apparent dip angle of the connecting line, and the dip angle extraction of all sampling points in the three-dimensional work area is completed. The stability of the extracted apparent dip angle information of the main survey line and the slope information of the connecting line is high, and the signal-to-noise ratio is also high.

[0164] Embodiment Four

[0165] The present embodiment provides a computer readable storage medium. The computer readable storage medium stores a computer program, and the computer program can realize all or part of the steps of the method in the foregoing method embodiments when executed by a processor:

[0166] determine a first apparent dip angle of a main survey line direction and a second apparent dip angle of a connecting line direction at a target position in a seismic three-dimensional imaging data body;

[0167] determine a true dip angle of a stratum at the target position through a preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle.

[0168] The computer readable storage medium can also include, or be separately comprised of, computer programs, data files, data structures, etc., or combinations thereof. The computer readable storage medium or computer program can be specifically designed and understood by those skilled in the computer software field, or can be known and available to those skilled in the computer software field. Examples of the computer readable storage medium include: magnetic media, such as a hard disk, a floppy disk, and a magnetic tape; optical media, such as a CD ROM disk and a DVD; magneto-optical media, such as an optical disk; and hardware devices specifically configured to store and execute computer programs, such as a read-only memory (ROM), a random access memory (RAM), a flash memory, or a server, an app application store, etc. Examples of the computer program include machine code (e.g., code generated by a compiler) and files containing high-level codes, which can be executed by a computer by using an interpreter. The described hardware devices can be configured to function as one or more software modules to perform the above-described operations and methods, and vice versa. In addition, the computer readable storage medium can be distributed in a networked computer system, and program codes or computer programs can be stored and executed in a decentralized manner.

[0169] Embodiment five

[0170] The embodiment provides a computer program product. The computer program product includes a computer program or instructions, which, when executed by a processor, implement all or part of the steps of the method in the foregoing method embodiments:

[0171] determining a first apparent dip angle of a main line direction and a second apparent dip angle of a tie line direction at a target position in a seismic three-dimensional imaging data volume;

[0172] determining a true dip angle of a formation at the target position by a preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle.

[0173] Further, the computer program product can include one or more computer executable components configured to perform embodiments when the program is run; the computer program product can also include a computer program tangibly embodied on a computer readable medium, the computer program including program code for performing any of the methods of the embodiments. In such embodiments, the computer program can be downloaded from a network and installed, and / or installed from a removable medium.

[0174] Embodiment six

[0175] The embodiment provides an electronic device. Figure 11 A connection block diagram of an electronic device provided by the embodiment of the present application is as follows: Figure 11As shown, the electronic device 1100 can include one or more processors 1101, a memory 1102, a multimedia component 1103, an input / output (I / O) interface 1104, and a communication component 1105.

[0176] The one or more processors 1101 are configured to perform all or part of the steps in the foregoing method embodiments. The memory 1102 is configured to store various types of data, which can include, for example, instructions of any application program or method in the electronic device, and application-related data.

[0177] The memory 1102 can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic or optical disk.

[0178] The one or more processors 1101 can be implemented by an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor, or other electronic elements, for performing all or part of the steps in the foregoing method embodiments:

[0179] determining a first apparent dip angle of a main line direction and a second apparent dip angle of a tie line direction at a target position in a seismic 3D imaging data volume;

[0180] determining a true dip angle of a formation at the target position by a preset dip angle determination model according to the first apparent dip angle and the second apparent dip angle.

[0181] The multimedia component 1103 can include a screen, which can be a touch screen, and audio components for outputting and / or inputting audio signals. For example, the audio components can include a microphone for receiving external audio signals. The received audio signals can be further stored in the memory or transmitted through the communication components. The audio components also include at least one speaker for outputting audio signals.

[0182] The I / O interface 1104 provides an interface between the one or more processors 1101 and other interface modules, which can be a keyboard, a mouse, a button, and the like. The buttons can be virtual buttons or physical buttons.

[0183] The communication component 1105 is configured to perform wired or wireless communication between the electronic device 1100 and other devices. The wired communication includes communication through a network port, a serial port, and the like; the wireless communication includes Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, 5G, or a combination of one or more of them.

[0184] To sum up, the application provides a method and device for determining the dip angle of underground structure based on three-dimensional seismic data, a computer readable storage medium and an electronic device. The method for determining the dip angle of underground structure based on three-dimensional seismic data first obtains the data information of the three-dimensional seismic imaging data body through conventional seismic data processing; then, the three-dimensional seismic imaging data is scanned along the main survey line and the connecting line direction respectively to obtain the apparent dip angles in the two directions, and then the angle conversion method proposed in the application can be used to convert the apparent dip angles in the main survey line and the connecting line to obtain the true dip angle information of the underground structure, and the dip angle extraction of all sampling points in the three-dimensional work area is completed. Specifically, it includes the following steps: step 110, determining the first apparent dip angle in the main survey line direction and the second apparent dip angle in the connecting line direction of the target position in the three-dimensional seismic imaging data body; step 120, determining the true dip angle of the target position according to the first apparent dip angle and the second apparent dip angle through a preset dip angle determination model. The apparent dip angle information and the connecting line slope information extracted have high stability and high signal-to-noise ratio.

[0185] In addition, it should be understood that the methods or devices disclosed in the embodiments provided in this application may also be implemented in other ways. The method or device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of the methods and devices according to the various embodiments of the present application. In this regard, each box in the flowchart or block diagram may represent a module, a computer program segment, or a portion of a computer program, which contains one or more computer programs for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the boxes may occur in an order different from that marked in the drawings, and may actually be executed substantially in parallel, or they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, may be implemented using a dedicated hardware-based system that performs the specified functions or actions, or may be implemented using a combination of dedicated hardware and computer programs.

[0186] In this application, the terms "comprise", "contain", or any other variant thereof are intended to cover a non-exclusive inclusion, so that processes, methods, articles, or devices that comprise a list of elements do not only include those elements, but also include other elements that are not expressly listed, or further include elements inherent in such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, device or equipment comprising the element; if there is a description of "first", "second", etc., it is only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features; in the description of the present application, unless otherwise specified, the meaning of the term "a plurality of" or "a plurality" is at least two; if there is a description of a server, it should be noted that the server can be a stand-alone physical server or terminal, or a server cluster composed of multiple physical servers, or a cloud server capable of providing cloud server, cloud database, cloud storage and CDN and other basic cloud computing services; if there is a description of intelligent terminal or mobile device in the present application, it should be noted that the intelligent terminal or mobile device can be a mobile phone, tablet computer, smart watch, netbook, wearable electronic device, personal digital assistant (PDA), augmented reality technology device (AR), virtual reality device (VR), smart television, smart sound, personal computer (PC) and the like, but is not limited thereto, and the specific form of the intelligent terminal or mobile device is not specially limited in the present application.

[0187] Finally, it should be noted that in the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "one example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0188] Although the embodiments of the present application have been shown and described above, it is understood that all the above-described embodiments are exemplary only, the contents described are merely adopted for the purpose of facilitating the understanding of the present application, and are not intended to limit the present application. Any person skilled in the art to which the present application belongs can make any modification and change in the form and details without departing from the spirit and scope of the present application, but the protection scope of the present application shall be subject to the scope defined by the appended claims.

Claims

1. A method for determining the dip angle of underground structures based on three-dimensional seismic data, characterized in that: The method comprises: Determine a first apparent dip angle in the direction of the main survey line and a second apparent dip angle in the direction of the tie line at a target position in a three-dimensional seismic imaging data volume; Determining the true dip of the formation at the target position using a preset dip determination model according to the first apparent dip angle and the second apparent dip angle; The true dip angle of the formation is converted by a preset angle conversion model to obtain the arc information at the underground target position; wherein the preset angle conversion model includes: in, is the true dip of the formation, is the arc corresponding to the true dip of the formation; Wherein, when both the first apparent inclination angle and the second apparent inclination angle are not less than a preset threshold value, the preset inclination angle determination model includes: in, is the stabilizing factor, is the first visual inclination angle, is the second apparent inclination angle.

2. The method for determining the dip angle of underground structures based on three-dimensional seismic data according to claim 1, characterized in that: Also includes: Traversing each imaging data sampling point in the seismic three-dimensional imaging data volume and determining a first apparent dip angle and a second apparent dip angle at each imaging data sampling point; According to the first apparent dip angle and the second apparent dip angle, the true dip angle of the formation at each imaging data sampling point is determined by a preset dip angle determination model to obtain azimuth information corresponding to the seismic three-dimensional imaging data volume.

3. The method for determining the dip angle of underground structures based on three-dimensional seismic data according to claim 1, characterized in that: When the first apparent tilt angle is less than a preset threshold and the second apparent tilt angle is not less than a preset threshold, the preset tilt angle determination model includes: in, is the stabilizing factor, is the first visual inclination angle, is the second apparent inclination angle.

4. The method for determining the dip angle of underground structures based on three-dimensional seismic data according to claim 1, characterized in that: When both the first apparent tilt angle and the second apparent tilt angle are smaller than a preset threshold, the preset tilt angle determination model includes: in, is the stabilizing factor, is the first visual inclination angle, is the second apparent inclination angle.

5. The method for determining the dip angle of underground structures based on three-dimensional seismic data according to claim 1, characterized in that: When the first apparent tilt angle is not less than a preset threshold and the second apparent tilt angle is less than a preset threshold, the preset tilt angle determination model includes: in, is the stabilizing factor, is the first visual inclination angle, is the second apparent inclination angle.

6. A device for determining the dip angle of underground structures based on three-dimensional seismic data, characterized in that: include: An apparent dip angle determination module is used to determine a first apparent dip angle in the direction of the main survey line and a second apparent dip angle in the direction of the tie line at a target position in a three-dimensional seismic imaging data volume; a formation true dip determining module, configured to determine the formation true dip at the target position using a preset dip determination model according to the first apparent dip and the second apparent dip; A conversion module is used to convert the true dip angle of the formation through a preset angle conversion model to obtain the arc information at the underground target position; wherein the preset angle conversion model includes: in, is the true dip of the formation, is the arc corresponding to the true dip of the formation; Wherein, when both the first apparent inclination angle and the second apparent inclination angle are not less than a preset threshold, the preset inclination angle determination model includes: in, is the stabilizing factor, is the first visual inclination angle, is the second apparent inclination angle.

7. A computer-readable storage medium, characterized in that The computer program stored in the computer-readable storage medium, when executed by one or more processors, implements the method for determining the dip angle of underground structures based on three-dimensional seismic data as described in any one of claims 1 to 5.

8. An electronic device, characterized in that: The method comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the method for determining the dip angle of underground structures based on three-dimensional seismic data as described in any one of claims 1 to 5 is implemented.

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