Method, device and equipment for determining magma distribution of intrusive fault zone and medium

Abstract

The invention discloses a method, a device, equipment and a medium for determining magma distribution of an intrusive fault zone, and relates to the technical field of oil and gas field exploration and development, and the method comprises the following steps: loading geological data of a target area; based on the geological data, constructing a fault plane of the magma intrusive fault zone in the target area; calculating a magma distribution indication factor of the magma intrusive fault zone in the target area; and determining a magma distribution position in the magma intrusive fault zone in the target area. According to the method, the value characteristic and the frequency characteristic of the earthquake information amount of the magma invading body are considered, the magma distribution indication factor S of the igneous rock invading fault zone is provided by combining the distribution characteristic of the fracture, the purpose of quantitatively predicting the magma distribution range in the fault zone is achieved, and the method can be used for predicting the closed and oil and gas dredging part in the fault zone. The brought prediction effect is more in line with the actual geological law; and a large number of geological parameters do not need to be counted, research can be directly carried out on seismic data, and the implementation process is more intuitive and rapid.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas field exploration and development, and in particular to a method, device, equipment and medium for determining magma distribution in an intrusive fault zone. Background Art

[0002] Due to frequent tectonic activities in faulted lake basins, the coexistence of igneous rocks and clastic rocks in fault zones is very common, which poses a direct challenge to the exploration of clastic block oil and gas reservoirs and igneous oil and gas reservoirs. In the past, people paid attention to the structure of clastic fault zones, but did not consider the changes in the internal structure of the fault zones after magma intrusion and the location of magma intrusion in the fault zones, and could not achieve quantitative determination of the location of oil and gas migration and drainage by faults. At present, the information mining in the use of seismic data is far from enough. However, seismic data contains rich information on the reflection of fault zones and magma. At present, it is not possible to use seismic data to directly predict the changes in the internal structure of the fault zones caused by magma intrusion and the location of magma intrusion in the fault zones. Summary of the invention

[0003] The purpose of the present invention is to provide a method, device, equipment and medium for determining the distribution of magma in an intrusive fault zone, which directly uses seismic data to identify the distribution of the fault zone after magma intrusion, and quantitatively predicts the structural differences of the fault zone in the clastic rock formation where magma intrusion occurs, thereby realizing the quantitative determination of the location of the migration and drainage of oil and gas by the fault. To achieve the above purpose, the present invention provides the following technical solutions:

[0004] The first object of the present invention is to provide a method for determining magma distribution in an intrusive fault zone, the method comprising the following steps:

[0005] Loading geological data of the target area; the geological data includes seismic data, well logging data and fault interpretation data;

[0006] Constructing a fault plane of a magma intrusive fault zone in a target area based on the geological data, and determining information entropy and earthquake frequency;

[0007] A magma distribution indicator factor is determined based on the information entropy and the earthquake frequency, and a magma distribution range of an intrusive fault zone in an exploration target area is determined based on the magma distribution indicator factor.

[0008] Furthermore, the calculation formula of the magma distribution indicator factor is as follows:

[0009] S = INFO × f;

[0010] Where, INFO represents information entropy; f represents the main frequency of seismic data at a certain location in the time window, HZ.

[0011] Furthermore, the determining of the magma distribution indicator factor based on the information entropy and the earthquake frequency, and the determining of the magma distribution range of the intrusive fault zone in the exploration target area based on the magma distribution indicator factor, include:

[0012] Determining the magma distribution indicator factor at each point in the target area according to the information entropy and the earthquake frequency;

[0013] Determine the upper threshold of regional magma distribution indicator factors;

[0014] The magma distribution range of the intrusive fault zone in the exploration target area is determined based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor.

[0015] Furthermore, the determination of the magma distribution range of the intrusive fault zone in the exploration target area based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor includes:

[0016] Determine the upper threshold of the regional magma distribution indicator factor for the wells that have been drilled in the exploration target area;

[0017] Compare the magma distribution indicator factor value of each point in the exploration target area with the upper limit threshold of the regional magma distribution indicator factor, and determine the distribution range of the target points whose magma distribution indicator factor value is less than the upper limit threshold of the regional magma distribution indicator factor;

[0018] According to the distribution range of the target points that are less than the upper threshold of the regional magma distribution indicator factor, the magma distribution range of the intrusive fault zone in the exploration target area is determined.

[0019] A second object of the present invention is to provide a device for determining magma distribution in an intrusive fault zone, the device comprising:

[0020] A geological data loading module, used to load geological data of a target area; the geological data includes seismic data, well logging data and fault interpretation data;

[0021] An information entropy and earthquake frequency determination module, used to construct a fault plane of a magma intrusion type fault zone in a target area according to the geological data, and determine information entropy and earthquake frequency;

[0022] The magma distribution range determination module is used to determine the magma distribution indicator factor according to the information entropy and the earthquake frequency, and determine the magma distribution range of the intrusive fault zone in the exploration target area according to the magma distribution indicator factor.

[0023] Furthermore, the magma distribution range determination module is specifically used to:

[0024] Determining the magma distribution indicator factor at each point in the target area according to the information entropy and the earthquake frequency;

[0025] Determine the upper threshold of regional magma distribution indicator factors;

[0026] The magma distribution range of the intrusive fault zone in the exploration target area is determined based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor.

[0027] Furthermore, the magma distribution range determination module is specifically used to:

[0028] Determine the upper threshold of the regional magma distribution indicator factor for the wells that have been drilled in the exploration target area;

[0029] Compare the magma distribution indicator factor value of each point in the exploration target area with the upper limit threshold of the regional magma distribution indicator factor, and determine the distribution range of the target points whose magma distribution indicator factor value is less than the upper limit threshold of the regional magma distribution indicator factor;

[0030] According to the distribution range of the target points that are less than the upper threshold of the regional magma distribution indicator factor, the magma distribution range of the intrusive fault zone in the exploration target area is determined.

[0031] A third object of the present invention is to provide an electronic device, comprising:

[0032] one or more processors;

[0033] A storage device for storing one or more programs;

[0034] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned method for determining the magma distribution of the intrusive fault zone.

[0035] A fourth object of the present invention is to provide a storage medium comprising computer executable instructions, which, when executed by a computer processor, are used to execute the above-mentioned method for determining the magma distribution in an intrusive fault zone.

[0036] Technical effects and advantages of the present invention:

[0037] The present invention considers the seismic reflection envelope characteristics and frequency characteristics of the magma intrusion body, combines the distribution characteristics of the fault, proposes the magma distribution indicator factor S of the igneous rock intrusion fault zone, and proposes a method and system for determining the magma distribution of the intrusive fault zone, so as to achieve the purpose of quantitatively predicting the closed oil and gas parts of such fault zones. The prediction effect brought by this method is more in line with the actual geological laws. The invention does not need to count a large number of geological parameters, but directly conducts research on seismic data. The implementation process is more intuitive and fast, and it is a direct use of seismic data and a deep mining process.

[0038] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A flow chart of a method for determining magma distribution in an intrusive fault zone provided by the present invention;

[0041] Figure 2 This is a distribution diagram of magma distribution indicator factors in the intrusive fault zone in the Bayantala area of ​​the Wuerxun Sag in the Hailar Basin according to an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of a device for determining magma distribution in an intrusive fault zone provided by the present invention;

[0043] Figure 4 A schematic diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In order to solve the deficiencies of the prior art, the present invention discloses a method for determining the magma distribution in an intrusive fault zone. Figure 1FIG. 1 is a flow chart of a method for determining magma distribution in an intrusive fault zone of the present invention, as shown in FIG. Figure 1 As shown, the method comprises the following steps:

[0046] Step S101, loading geological data of the target area;

[0047] Step S102, constructing a fault plane of a magma intrusion type fault zone in a target area according to the geological data, and determining information entropy and earthquake frequency;

[0048] Step S103: determining a magma distribution indicator factor according to the information entropy and the earthquake frequency, and determining a magma distribution range of an intrusive fault zone in an exploration target area according to the magma distribution indicator factor.

[0049] This method has guiding significance for the study of oil and gas migration and accumulation along faults of magma intrusion, helps to reduce geological risks in exploration, and improve the success rate of block closure exploration and evaluation. It is a leading technology.

[0050] The specific implementation steps of the above method are as follows:

[0051] Step S101, loading geological data of a target area; wherein the geological data includes seismic data, well logging data and fault interpretation data;

[0052] Step S102, constructing a fault plane of a magma intrusion type fault zone in a target area according to the geological data, and determining information entropy and earthquake frequency;

[0053] Step S103, determining a magma distribution indicator factor according to the information entropy and the earthquake frequency, and determining the magma distribution range of the intrusive fault zone in the exploration target area according to the magma distribution indicator factor; specifically, calculating the magma distribution indicator factor of the igneous intrusive fault zone, that is, the magma distribution indicator factor, and the calculation formula is as follows:

[0054] S = INFO × f;

[0055] In the formula, S represents the magma distribution indicator factor, INFO represents information entropy, which is a basic concept of information theory, describing the uncertainty of possible events of the information source and indicating the probability of occurrence of specific information; f represents the main frequency of seismic data at a certain location in the time window, HZ.

[0056] From the perspective of information dissemination, information entropy can represent the value of information. Therefore, another calculation formula for information entropy can be expressed as:

[0057] H(x)=E[I(xi)]=E[log(2,1 / P(xi))]=-∑P(xi)log(2,P(xi)), (i=1,2,...,n);

[0058] In the formula, H(x) represents information entropy; x represents a random variable, corresponding to which is the set of all possible outputs, defined as a symbol set, and the output of the random variable is represented by x; P(xi) represents the output probability function; the greater the uncertainty of the variable, the greater the entropy, and the greater the amount of information required to clarify it.

[0059] In step S103 of the present invention, as a preferred implementation, the magma distribution indicator factor is determined based on the information entropy and the earthquake frequency, and the magma distribution range of the intrusive fault zone in the exploration target area is determined based on the magma distribution indicator factor. The specific steps are as follows:

[0060] Step S103.1, determining the magma distribution indicator factor of each point in the target area according to the information entropy and the earthquake frequency;

[0061] Step S103.2, determining the upper threshold of the regional magma distribution indicator factor;

[0062] Step S103.3: Determine the magma distribution range of the intrusive fault zone in the exploration target area based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor.

[0063] In step S103.3 of the present invention, as a preferred embodiment, the magma distribution range of the intrusive fault zone in the exploration target area is determined based on the magma distribution indicator factor of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor. The specific steps are as follows:

[0064] Step S103.3.1, determining the upper threshold of the regional magma distribution indicator factor of the wells that have been determined to be drilled in the exploration target area;

[0065] Step S103.3.2, comparing the magma distribution indicator factor value of each point in the exploration target area with the upper limit threshold of the regional magma distribution indicator factor, and determining the distribution range of the target points whose magma distribution indicator factor value is less than the upper limit threshold of the regional magma distribution indicator factor;

[0066] Step S103.3.3: Determine the magma distribution range of the intrusive fault zone in the exploration target area based on the distribution range of the target points that are less than the upper threshold of the regional magma distribution indicator factor.

[0067] Example

[0068] In this case, a fault in the Bayantala area of ​​the Wuerxun Depression in the Hailar Basin is taken as an example to describe the implementation process and effect of the present invention. Figure 2This is a distribution diagram of magma distribution indicator factors in the intrusive fault zone in the Bayantala area of ​​the Wuerxun Sag in the Hailar Basin according to an embodiment of the present invention, such as Figure 2 As shown, in Figure 2 The distribution of the magma distribution indicator factor S along the fault plane of the igneous intrusion fault zone is shown in the figure. It is found that there are obvious changes within the same fault zone. This change not only reflects the difference in its internal structure, but also reflects its lateral and vertical sealing ability and favorable positions for oil and gas. Specifically, combined with the drilling results, (1) it is found that the position with S index less than 380 is the most conducive to sealing oil and gas, which belongs to the low S value area, generally consistent with the magma intrusion position; (2) S greater than 400 represents a high value area, which is a position where high information entropy and high frequency occur simultaneously, often in areas with complex and diverse clastic lithology or high degree of fragmentation of the intrusion rock body. Overall, the sealing capacity is weaker than that of the magma intrusion position. The special thing is that if the high value area greater than 400 is a clastic rock fracture structure, its sealing capacity is determined according to the various clastic rock fracture sealing evaluation methods that have been published; (3) The position with S index between 380 and 400 belongs to the mixed transition of clastic rock and igneous rock, which is a position with good sealing capacity. Combined with the exploration well drilling results and the distribution of oil and gas wells in this area, it is statistically believed that the smaller the S index is, the more it can reflect the location of magma development and the more conducive it is to fracture sealing of oil and gas; this shows that the application effect of the present invention conforms to geological laws and is reliable.

[0069] Based on the same concept of the present invention, the present invention also discloses a device for determining magma distribution in an intrusive fault zone. Figure 3 FIG. 1 is a schematic diagram of a device for determining magma distribution in an intrusive fault zone according to the present invention, Figure 3 As shown, the device comprises:

[0070] A geological data loading module 201 is used to load geological data of a target area; the geological data includes seismic data, well logging data and fault interpretation data;

[0071] An information entropy and earthquake frequency determination module 202 is used to construct a fault plane of a magma intrusion type fault zone in a target area according to the geological data, and determine information entropy and earthquake frequency;

[0072] The magma distribution range determination module 203 is used to determine the magma distribution indicator factor according to the information entropy and the earthquake frequency, and determine the magma distribution range of the intrusive fault zone in the exploration target area according to the magma distribution indicator factor.

[0073] Furthermore, the magma distribution range determination module 203 is specifically used to:

[0074] Determining the magma distribution indicator factor at each point in the target area according to the information entropy and the earthquake frequency;

[0075] Determine the upper threshold of regional magma distribution indicator factors;

[0076] The magma distribution range of the intrusive fault zone in the exploration target area is determined based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor.

[0077] Furthermore, the magma distribution range determination module 203 is specifically used to:

[0078] Determine the upper threshold of the regional magma distribution indicator factor for the wells that have been drilled in the exploration target area;

[0079] Compare the magma distribution indicator factor value of each point in the exploration target area with the upper limit threshold of the regional magma distribution indicator factor, and determine the distribution range of the target points whose magma distribution indicator factor value is less than the upper limit threshold of the regional magma distribution indicator factor;

[0080] According to the distribution range of the target points that are less than the upper threshold of the regional magma distribution indicator factor, the magma distribution range of the intrusive fault zone in the exploration target area is determined.

[0081] Based on the same inventive concept, the present invention also provides an electronic device, Figure 4 A schematic diagram of an electronic device provided by the present invention, such as Figure 4 As shown, the electronic device includes at least one processor 301, at least one communication interface 302, at least one memory 303 and at least one communication bus 304; wherein the processor 301, the communication interface 302 and the memory 303 communicate with each other through the communication bus 304;

[0082] Memory 303, storing computer programs;

[0083] The processor 301 is used to implement the method for determining the magma distribution in the intrusive fault zone when executing the program stored in the memory 303.

[0084] Optionally, the communication interface may be an interface of a communication module, such as an interface of a GSM module; the processor may be a processor CPU, or an application specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention. The memory may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory stores a program, and the processor calls the program stored in the memory to execute some or all of the above method embodiments.

[0085] Based on the same inventive concept, the present invention also provides a computer-readable storage medium storing a computer program, wherein when the computer program is executed, some or all of the above method embodiments are implemented. Optionally, the storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0086] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining magma distribution in an intrusive fault zone, characterized in that: The method comprises the following steps: Loading geological data of the target area; the geological data includes seismic data, well logging data and fault interpretation data; Constructing a fault plane of a magma intrusive fault zone in a target area based on the geological data, and determining information entropy and earthquake frequency; A magma distribution indicator factor is determined based on the information entropy and the earthquake frequency, and a magma distribution range of an intrusive fault zone in an exploration target area is determined based on the magma distribution indicator factor.

2. The method for determining magma distribution in an intrusive fault zone according to claim 1, characterized in that: The calculation formula of the magma distribution indicator factor is as follows: S = INFO × f; Where, INFO represents information entropy; f represents the main frequency of seismic data at a certain location in the time window, HZ.

3. A method for determining magma distribution in an intrusive fault zone according to claim 1 or 2, characterized in that: The method of determining the magma distribution indicator factor based on the information entropy and the earthquake frequency, and determining the magma distribution range of the intrusive fault zone in the exploration target area based on the magma distribution indicator factor, includes: Determining the magma distribution indicator factor at each point in the target area according to the information entropy and the earthquake frequency; Determine the upper threshold of regional magma distribution indicator factors; The magma distribution range of the intrusive fault zone in the exploration target area is determined based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor.

4. The method for determining magma distribution in an intrusive fault zone according to claim 3, characterized in that: The method of determining the magma distribution range of the intrusive fault zone in the exploration target area based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factors includes: Determine the upper threshold of the regional magma distribution indicator factor for the wells that have been drilled in the exploration target area; Compare the magma distribution indicator factor value of each point in the exploration target area with the upper limit threshold of the regional magma distribution indicator factor, and determine the distribution range of the target points whose magma distribution indicator factor value is less than the upper limit threshold of the regional magma distribution indicator factor; According to the distribution range of the target points that are less than the upper threshold of the regional magma distribution indicator factor, the magma distribution range of the intrusive fault zone in the exploration target area is determined.

5. A device for determining magma distribution in an intrusive fault zone, characterized in that: The device comprises: A geological data loading module, used to load geological data of a target area; the geological data includes seismic data, well logging data and fault interpretation data; An information entropy and earthquake frequency determination module, used to construct a fault plane of a magma intrusion type fault zone in a target area according to the geological data, and determine information entropy and earthquake frequency; The magma distribution range determination module is used to determine the magma distribution indicator factor according to the information entropy and the earthquake frequency, and determine the magma distribution range of the intrusive fault zone in the exploration target area according to the magma distribution indicator factor.

6. The device for determining magma distribution in an intrusive fault zone according to claim 5, characterized in that: The magma distribution range determination module is specifically used for: Determining the magma distribution indicator factor at each point in the target area according to the information entropy and the earthquake frequency; Determine the upper threshold of regional magma distribution indicator factors; The magma distribution range of the intrusive fault zone in the exploration target area is determined based on the magma distribution indicator factors of each point in the target area and the upper limit threshold of the regional magma distribution indicator factor.

7. The device for determining magma distribution in an intrusive fault zone according to claim 6, characterized in that: The magma distribution range determination module is specifically used for: Determine the upper threshold of the regional magma distribution indicator factor for the wells that have been drilled in the exploration target area; Compare the magma distribution indicator factor value of each point in the exploration target area with the upper limit threshold of the regional magma distribution indicator factor, and determine the distribution range of the target points whose magma distribution indicator factor value is less than the upper limit threshold of the regional magma distribution indicator factor; According to the distribution range of the target points that are less than the upper threshold of the regional magma distribution indicator factor, the magma distribution range of the intrusive fault zone in the exploration target area is determined.

8. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining the magma distribution in an intrusive fault zone as described in any one of claims 1-5.

9. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions, when executed by a computer processor, are used to execute the method for determining magma distribution in an intrusive fault zone as described in any one of claims 1-5.

Images