Helium generation flux calculation method and device and related equipment

Abstract

The invention discloses a helium generation flux calculation method and device and related equipment. The method comprises the steps that the absolute age, the density, the area, the thickness and the porosity of a helium source rock of a target area and the content of a U element and the content of a Th element in the helium source rock are obtained; based on the contents of the U element and the Th element in the helium source rock, the contents of 238U, 235U and 232Th in the current helium source rock are calculated; based on the absolute age of the helium source rock and the contents of 238U, 235U and 232Th in the current helium source rock, the initial contents of 238U, 235U and 232Th in the helium source rock are calculated; based on the initial contents of 238U, 235U and 232Th in the helium source rock, the number of helium atoms generated by radioactive decay of each gram of helium source rock every year is calculated; based on the number of helium atoms generated by radioactive decay of each gram of helium source rock every year, the volume of helium generated by the helium source rock under the standard temperature and pressure condition is obtained through calculation, errors caused by helium generation flux calculation through a cause method are reduced, and the precision of helium resource quantity calculation in a research area is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of helium resource evaluation, and in particular to a helium generation flux calculation method, device and related equipment. Background Art

[0002] Helium is a strategic scarce resource with the characteristics of low melting point, low boiling point, easy diffusion, difficult sealing and difficult dissolution. It is widely used in high-tech fields such as aerospace and deep diving, and the global supply is tight. Helium is mainly distributed in the United States, Qatar, Algeria and Russia worldwide, and the helium resources in these countries account for more than 88% of the world's total helium resources. my country has few helium resources and a low degree of exploration, accounting for about 2% of the world. The amount of helium produced is far lower than the demand for helium, and it has long relied on imports. In order to get rid of the situation where my country's helium resources are heavily dependent on imports, in recent years, my country has gradually begun to develop its own helium industry, and has successively discovered helium-containing and helium-rich gas fields in many places, such as Weiyuan Gas Field, Jinqiu Gas Field, Fuling Shale Gas Field, Anyue Gas Field in Sichuan Basin; Dongsheng Gas Field and Qingyang Gas Field in Ordos Basin; Mabei, Dongping, Quanjishan in Qaidam Basin; Hetianhe Gas Field in Tarim Basin, etc.

[0003] In the process of helium resource exploration and evaluation, the calculation of resource quantity is an important basis for evaluating whether the gas reservoir is rich in helium and making investment decisions. Helium is an associated gas, and there are relatively few studies on the calculation method of helium resources. At present, there are two main methods for calculating helium resources at home and abroad: one is the component method, which is based on the calculation of natural gas resources and helium content in natural gas reservoirs. It is highly dependent on the degree of exploration of natural gas resources in the study area and is suitable for study areas with high degree of exploration of natural gas and many natural gas component measurement data; the second is the genetic method, which is based on the radioactive element decay formula and combines the specific geological conditions of the study area from the perspective of the principle of helium generation to derive the helium resource quantity. At present, the evaluation method of helium resources in my country is not mature yet and is still in the stage of continuous exploration and deepening. Summary of the invention

[0004] In order to increase the selection space of helium resource calculation methods and improve the calculation accuracy of helium resources, an embodiment of the present invention provides a helium generation flux calculation method, device and related equipment.

[0005] In a first aspect, an embodiment of the present invention provides a method for calculating helium generation flux, comprising:

[0006] Obtain the absolute age, density, area, thickness, porosity, and content of U and Th in the helium source rock in the target area;

[0007] Based on the contents of U and Th in the helium source rocks and 238 U. 235U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content;

[0008] Based on the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 Initial Th content;

[0009] Based on helium source rock 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year;

[0010] Based on the absolute age, density, area, thickness, porosity and number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated.

[0011] In one or some optional embodiments, the content of U and Th in the helium source rock and 238 U. 235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content, including:

[0012] Based on the contents of U and Th in the helium source rocks and 238 U. 235 U and 232 The abundance of Th in nature can be calculated according to Formula 1: 238 U. 235 U and 232 Th content:

[0013] M = a[X], formula 1;

[0014] Wherein, [X] is the content of U or Th in the helium source rock; M is the content of the isotope corresponding to U or Th in the current helium source rock; a is the abundance of the isotope corresponding to U or Th in nature.

[0015] In one or some optional embodiments, the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 The initial content of Th includes:

[0016] Based on the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The Th content in the helium source rock can be calculated according to Formula 2: 238 U. 235 U and 232 Initial Th content:

[0017]

[0018] Where M is the current content of the isotope in the helium source rock; N is the initial content of the corresponding isotope in the helium source rock; t is the absolute age of the helium source rock; and T is the half-life of the corresponding isotope in the helium source rock.

[0019] In one or some optional embodiments, the helium source rock 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year, including:

[0020] according to 238 U. 235 U and 232 The radioactive decay law of Th is determined 238 U. 235 U. 232 The number of helium atoms produced during the radioactive decay of Th;

[0021] based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is used to calculate the number of helium atoms produced by radioactive decay per gram of helium source rock per year.

[0022] In one or some optional embodiments, the 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is used to calculate the number of helium atoms produced by radioactive decay per gram of helium source rock per year, including:

[0023] based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is calculated according to Formula 3 to obtain the number of helium atoms produced by radioactive decay per gram of helium source rock per year:

[0024] G=k1×N1(N A / A 238U )(e λ1 -1)+k2×N2(N A / A 235U )(e λ2 -1)+k3×N3(N A / A 232Th )(e λ3 -1), formula 3;

[0025] Where G is the number of helium atoms produced by radioactive decay per gram of helium source rock per year; k1 is 238 The number of helium atoms produced by U during radioactive decay; k2 is 235 The number of helium atoms produced by U during radioactive decay; k3 is 232 The number of helium atoms produced by Th during radioactive decay; N1 is the number of helium atoms in the helium source rock. 238 The initial content of U; N2 is the content of helium in the source rock 235 The initial content of U; N3 is the content of helium in the source rock 232 Initial content of Th; N A A is Avogadro's constant; 238Ufor The molar mass of 235U for The molar mass of 232Th for The molar mass of 238 The decay constant of U; λ2 is 235 The decay constant of U; λ3 is 232 The decay constant of Th.

[0026] In one or some optional embodiments, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the number of helium atoms produced by radioactive decay per gram of helium source rock per year, including:

[0027] Based on the absolute age, density, area, thickness, porosity and number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated according to Formula 4:

[0028] V He =G×10 3 / N A ×R×T / ×P×t×H×S×ρ×(1-φ), formula 4;

[0029] Where V He is the volume of helium produced by helium source rocks under standard temperature and pressure conditions; N A is Avogadro's constant; R is the molar gas constant; T is the standard temperature; P is the standard atmospheric pressure; t is the absolute age of the helium source rock; H is the thickness of the helium source rock; S is the area of ​​the helium source rock; ρ is the density of the helium source rock; φ is the porosity of the helium source rock.

[0030] In a second aspect, an embodiment of the present invention provides a helium generation flux calculation device, comprising:

[0031] An acquisition module is used to obtain the absolute age of the helium source rock in the target area, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the content of U and Th in the helium source rock;

[0032] The first calculation module is used to calculate the content of U and Th in the helium source rock and 238 U. 235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content;

[0033] The second calculation module is used to calculate the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 Initial Th content;

[0034] The third calculation module is used to calculate the 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year;

[0035] The fourth calculation module is used to calculate the volume of helium produced by the helium source rock under standard temperature and pressure conditions based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the number of helium atoms produced by radioactive decay per gram of helium source rock per year.

[0036] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the helium generation flux calculation method as described in the first aspect.

[0037] In a fourth aspect, an embodiment of the present invention provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the helium generation flux calculation method as described in the first aspect is implemented.

[0038] In a fifth aspect, an embodiment of the present invention provides a computer program product comprising instructions, characterized in that when the computer program product is run on a computer device, the computer device executes the helium generation flux calculation method as described in the first aspect.

[0039] The beneficial effects of the above technical solution provided in the embodiments of the present invention include at least:

[0040] The helium generation flux calculation method provided in the embodiment of the present invention determines the helium source rock based on the decay law of radioactive U and Th elements. 238 U. 235 U and 232The initial content of Th, combined with the specific geological conditions of the study area, is used to calculate the helium resources of the helium source rock, which solves the problem of ignoring some helium produced by the decayed U and Th elements in the geological history when calculating the helium resources by the genetic method, reduces the error caused by the calculation of the helium flux based on the current U and Th element content, improves the accuracy of the calculation of the helium resources in the study area, makes the calculated helium resources more accurate and reliable, realizes a more comprehensive evaluation of helium resources, and can provide effective support for the prediction of helium resources in the study area. In addition, this method has low operating costs and is of great application significance for the calculation of resources in the process of helium resource exploration and development.

[0041] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0042] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 A schematic diagram of a flow chart of a method for calculating helium generation flux provided in an embodiment of the present invention;

[0045] Figure 2 It is a structural block diagram of a helium generation flux calculation device provided in an embodiment of the present invention;

[0046] Figure 3 The figure is a structural block diagram of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0048] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The inventors found that the genetic method used the current U and Th content as a benchmark when calculating the helium resources, and ignored the helium resources generated by the decayed U and Th elements.

[0051] Based on this, the present invention provides a helium generation flux calculation method, device and related equipment, which are described in detail through specific embodiments below.

[0052] Embodiment 1

[0053] The embodiment of the present invention provides a method for calculating the helium generation flux, referring to Figure 1 As shown, including:

[0054] S101: Obtaining the absolute age, density, area, thickness, porosity, and contents of U and Th in the helium source rock in the target area;

[0055] S102: Based on the content of U and Th in the helium source rock and 238 U. 235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content;

[0056] S103: Based on the absolute age of helium source rocks, 238 The half-life of U 235 The half-life of U232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 Initial Th content;

[0057] S104: Based on helium source rocks 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year;

[0058] S105: Based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock and the number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated.

[0059] The helium generation flux calculation method provided in the embodiment of the present invention determines the initial helium source rock based on the decay law of radioactive U and Th elements. 238 U. 235 U and 232 The Th content is combined with the specific geological conditions of the study area to calculate the helium resources of the helium source rock, which solves the problem of ignoring some helium produced by the decayed U and Th elements in the geological history when calculating the helium resources by the genetic method, and reduces the error caused by the calculation of the helium flux based on the current U and Th content by the genetic method, and improves the accuracy of the calculation of the helium resources in the study area, making the calculated helium resources more accurate and reliable, and realizing a more comprehensive evaluation of helium resources, which can provide effective support for the prediction of helium resources in the study area. In addition, this method has low operating costs and has important application significance for the calculation of resources in the process of helium resource exploration and development.

[0060] In an optional embodiment, in step S101, the absolute age of the helium source rock in the target area, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the content of U and Th in the helium source rock are all obtained based on the geological data of the target area. Further, the necessary geological data and the physical and chemical constant parameters required for calculation can be sorted into a database to facilitate subsequent calculations.

[0061] In an optional embodiment, step S102: based on the contents of U and Th in the helium source rock and 238 U.235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content, specifically including:

[0062] Based on the contents of U and Th in the helium source rocks and 238 U. 235 U and 232 The abundance of Th in nature can be calculated according to Formula 1: 238 U. 235 U and 232 Th content:

[0063] M = a[X], formula 1;

[0064] Wherein, [X] is the content of U or Th in the helium source rock; M is the content of the isotope corresponding to U or Th in the current helium source rock; a is the abundance of the isotope corresponding to U or Th in nature.

[0065] In an optional embodiment, step S103: based on the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 The initial content of Th includes:

[0066] Based on the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The Th content in the helium source rock can be calculated according to Formula 2: 238 U. 235 U and 232 Initial Th content:

[0067]

[0068] Where M is the current content of the isotope in the helium source rock; N is the initial content of the corresponding isotope in the helium source rock; t is the absolute age of the helium source rock; and T is the half-life of the corresponding isotope in the helium source rock.

[0069] The half-life calculation formula of the element, that is, the above formula 2, was used to calculate the helium source rock 238 U. 235 U and 232 The initial content of Th reduces the error caused by the calculation of helium flux based on the current content of U and Th elements in the genetic method, which is beneficial to improving the accuracy of helium resource calculation in the study area.

[0070] In an optional embodiment, step S104: based on the helium source rock 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year, including:

[0071] S1041: According to 238 U. 235 U and 232 The radioactive decay law of Th is determined 238 U. 235 U. 232 The number of helium atoms produced during the radioactive decay of Th;

[0072] Specifically, 238 U. 235 U and 232 The radioactive decay laws of Th are:

[0073]

[0074]

[0075]

[0076] It can be seen from this that 238 U. 235 U. 232 During the radioactive decay of Th, 8 7 6

[0077] S1042: Based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is used to calculate the number of helium atoms produced by radioactive decay per gram of helium source rock per year.

[0078] In an optional implementation, step S1042: based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is used to calculate the number of helium atoms produced by radioactive decay per gram of helium source rock per year, including:

[0079] based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is calculated according to Formula 3 to obtain the number of helium atoms produced by radioactive decay per gram of helium source rock per year:

[0080] G=k1×N1(N A / A 238U )(e λ1 -1)+k2×N2(N A / A 235U )(e λ2 -1)+k3×N3(N A / A 232Th )(e λ3 -1), formula 3;

[0081] Where G is the number of helium atoms produced by radioactive decay per gram of helium source rock per year; k1 is 238 The number of helium atoms produced by U during radioactive decay; k2 is 235 The number of helium atoms produced by U during radioactive decay; k3 is 232 The number of helium atoms produced by Th during radioactive decay; N1 is the number of helium atoms in the helium source rock. 238 The initial content of U; N2 is the content of helium in the source rock 235 The initial content of U; N3 is the content of helium in the source rock 232 Initial content of Th; N A A is Avogadro's constant; 238U for The molar mass of 235U for The molar mass of 232Th for The molar mass of 238 The decay constant of U; λ2 is 235 The decay constant of U; λ3 is 232The decay constant of Th.

[0082] In an optional embodiment, step S105: based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated, specifically including:

[0083] Based on the absolute age, density, area, thickness, porosity and number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated according to Formula 4:

[0084] V He =G×10 3 / N A ×R×T / ×P×t×H×S×ρ×(1-φ), formula 4;

[0085] Where V He is the volume of helium produced by helium source rocks under standard temperature and pressure conditions; N A is Avogadro's constant; R is the molar gas constant; T is the standard temperature; P is the standard atmospheric pressure; t is the absolute age of the helium source rock; H is the thickness of the helium source rock; S is the area of ​​the helium source rock; ρ is the density of the helium source rock; φ is the porosity of the helium source rock.

[0086] In order to more clearly illustrate the helium generation flux calculation method provided in the embodiment of the present invention, taking the target area as the X basin as an example (the X basin has three types of helium source rocks, namely helium source rock A, helium source rock B and helium source rock C), the following embodiment is provided to describe in detail the application process of the helium generation flux calculation method:

[0087] S1: Obtain the necessary geological data of Basin X, and organize the necessary geological data of Basin A and the physical and chemical constant parameters required for subsequent use into a database. The specific data of the database are shown in Table 1.

[0088] Table 1 Geological parameters and physical and chemical constant parameters

[0089]

[0090] S2: Based on the content of U and Th in the helium source rock and 238 U. 235 U and 232 The abundance of Th in nature can be calculated according to Formula 1: 238 U. 235 U and 232 Th content:

[0091] M = a[X], formula 1;

[0092] Wherein, [X] is the content of U or Th in the helium source rock; M is the content of the isotope corresponding to U or Th in the current helium source rock; a is the abundance of the isotope corresponding to U or Th in nature.

[0093] Specifically, taking helium source rock A as an example:

[0094] The content of U in the helium source rock A and 238 Substituting the abundance of U in nature into Formula 1, we can obtain 238 U content M1:

[0095] M1=a1[U]; where [U] is the content of U element in helium source rock A, and a1 is 238 The abundance of U in nature. After substituting the data in Table 1, we can find that M1 is equal to 3.4748.

[0096] The content of U in the helium source rock A and 235 Substituting the abundance of U in nature into Formula 1, we can obtain 235 U content M2:

[0097] M2=a2[U]; where [U] is the content of U element in helium source rock A, and a2 is 235 The abundance of U in nature, after substituting the data in Table 1, we can find that M2 is equal to 0.0252;

[0098] The content of Th in the helium source rock A and 232 Substituting the abundance of Th in nature into Formula 1, we can obtain 232 Th content M3:

[0099] M3=a3[Th]; where [Th] is the content of Th in the helium source rock A, and a3 is 232 The abundance of Th in nature. After substituting the data in Table 1, we can find that M3 is equal to 14.

[0100] According to the above calculation method, the helium source rock A, helium source rock B and helium source rock C are 238 U. 235 U and 232 The calculation results of the current content of Th are shown in Table 2:

[0101] Table 2 Current helium source rocks 238 U. 235 U and 232 Th content table

[0102] <![CDATA[M1]]> <![CDATA[M2]]> <![CDATA[M3]]> Rock mass name <![CDATA[ 238 In(10 -6 )]]> <![CDATA[ 235 In(10 -6 )]]> <![CDATA[ 232 Th(10 -6 )]]> Helium source rock A 3.4748 0.0252 14 Helium source rock B 2.38272 0.01728 10.6 Helium source rock C 6.65176 0.04824 23.5

[0103] S3: Based on the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The Th content in the helium source rock can be calculated according to Formula 2: 238 U. 235 U and 232 Initial Th content:

[0104]

[0105] Wherein, M is the isotope content in the current helium source rock; N is the initial content of the corresponding isotope in the helium source rock; t is the absolute age of the helium source rock; T is the half-life of the corresponding isotope in the helium source rock;

[0106] Specifically, taking helium source rock A as an example:

[0107] Initial helium source rock A 238 U content is: Substitute the data in Table 1 to find the initial 238 U content N1 is equal to 3.474801024;

[0108] Initial helium source rock A 235 U content is: Substitute the data in Table 1 to find the initial 235 U content N2 equals 0.025200047;

[0109] Initial helium source rock A 232 Th content is: Substitute the data in Table 1 to find the initial 235 U content N2 is equal to 0.025200047.

[0110] According to the above calculation method, the helium source rock A, helium source rock B and helium source rock C are 238 U. 235 U and 232 The calculation results of the initial Th content are shown in Table 3:

[0111] Table 3 Helium source rock before decay 238 U. 235 U and 232 Table of initial Th content

[0112] <![CDATA[N1]]> <![CDATA[N2]]> <![CDATA[N3]]> Rock mass name <![CDATA[ 238 In(10 -6 )]]> <![CDATA[ 235 In(10 -6 )]]> <![CDATA[ 232 Th(10 -6 )]]> Helium source rock A 3.474801024 0.025200047 14.00000132 Helium source rock B 2.382720092 0.017280004 10.60000013 Helium source rock C 6.651760248 0.048240011 23.50000028

[0113] S4: According to238 U. 235 U and 232 The radioactive decay law of Th is determined 238 U. 235 U. 232 Th is produced in the process of radioactive decay as 8 7 6

[0114] S5: Based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is calculated according to Formula 3 to obtain the number of helium atoms produced by radioactive decay per gram of helium source rock per year:

[0115] G=k1×N1(N A / A 238U )(e λ1 -1)+k2×N2(N A / A 235U )(e λ2 -1)+k3×N3 ( N A / A 232Th )( e λ3 -1 ) , formula 3;

[0116] Where G is the number of helium atoms produced by radioactive decay per gram of helium source rock per year; k1 is 238 The number of helium atoms produced by U during radioactive decay; k2 is 235 The number of helium atoms produced by U during radioactive decay; k3 is 232 The number of helium atoms produced by Th during radioactive decay; N1 is the number of helium atoms in the helium source rock. 238 The initial content of U; N2 is the content of helium in the source rock 235 The initial content of U; N3 is the content of helium in the source rock 232 Initial content of Th; N A A is Avogadro's constant; 238U for The molar mass of 235U for The molar mass of 232Th for The molar mass of 238 The decay constant of U; λ2 is 235 The decay constant of U; λ3 is 232The decay constant of Th;

[0117] Taking helium source rock A as an example, substituting the data in Table 1 into Formula 3, the number of helium atoms G produced by radioactive decay per gram of helium source rock A per year is equal to 22144034.04.

[0118] According to the above calculation method, the calculation results of the number of helium atoms produced by radioactive decay per gram of helium source rock A, per gram of helium source rock B and per gram of helium source rock C per year are shown in Table 4:

[0119] Table 4 The number of helium atoms produced by radioactive decay per gram of helium source rock per year

[0120] Rock mass name Helium atomic number G Helium source rock A 22144034.04 Helium source rock B 15955524.70 Helium source rock C 39845543.71

[0121] S6: Based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock and the number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated according to Formula 4:

[0122] V He =G×10 3 / N A ×R×T / ×P×t×H×S×ρ×(1-φ), formula 4;

[0123] Where V He is the volume of helium produced by helium source rocks under standard temperature and pressure conditions; N A is Avogadro's constant; R is the molar gas constant; T is the standard temperature; P is the standard atmospheric pressure; t is the absolute age of the helium source rock; H is the thickness of the helium source rock; S is the area of ​​the helium source rock; ρ is the density of the helium source rock; φ is the porosity of the helium source rock.

[0124] Taking helium source rock A as an example, substitute the data in Table 1 into Formula 4 to calculate the volume V of helium produced by the helium source rock under standard temperature and pressure conditions. He =2.827×10 11 .

[0125] According to the above calculation method, the calculation results of the helium volume (i.e., helium flux) produced by helium source rock A, helium source rock B and helium source rock C under standard temperature and pressure conditions are shown in Table 5:

[0126] Table 5 Helium flux from helium source rocks in the X basin

[0127] Rock mass name <![CDATA[Helium gas volume (m 3 )]]> Helium source rock A <![CDATA[2.827×10 11 ]]> Helium source rock B <![CDATA[2.195×10 10 ]]> Helium source rock C <![CDATA[3.678×10 8 ]]> total <![CDATA[3.051×10 11 ]]>

[0128] Embodiment 2

[0129] Based on the same inventive concept, an embodiment of the present invention provides a helium generation flux calculation device, referring to Figure 2 As shown, including:

[0130] An acquisition module 101 is used to acquire the absolute age of the helium source rock in the target area, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the contents of U and Th in the helium source rock;

[0131] The first calculation module 102 is used to calculate the content of U and Th in the helium source rock and 238 U. 235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content;

[0132] The second calculation module 103 is used to calculate the absolute age of the helium source rock based on the 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 Initial Th content;

[0133] The third calculation module 104 is used to calculate the 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year;

[0134] The fourth calculation module 105 is used to calculate the volume of helium produced by the helium source rock under standard temperature and pressure conditions based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the number of helium atoms produced by radioactive decay per gram of helium source rock per year.

[0135] Embodiment 3

[0136] Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the helium generation flux calculation method as described in the first embodiment is implemented.

[0137] Among them, the computer readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a register, a hard disk, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above, or any other form of computer readable storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an application-specific integrated circuit (ASIC). In the embodiments of the present application, a computer-readable storage medium may be any tangible medium that contains or stores a program, which may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0138] Embodiment 4

[0139] Based on the same inventive concept, an embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the helium generation flux calculation method as described in the first aspect is implemented.

[0140] Figure 3 A possible structural diagram of the computer device involved in the above embodiment is shown. The computer device includes: a processor 1002 and a communication interface 1003. The processor 1002 is used to control and manage the actions of the computer device, for example, to execute the above alarm association method, and / or to execute other processes of the technology described in this article. The communication interface 1003 is used to support the communication between the computer device and other network entities, for example, to execute the steps performed by the above communication unit 902. The computer device may also include: a memory 1001 and a bus 1004, and the memory 1001 is used to store program codes and data of the computer device.

[0141] Among them, the memory 1001 can be a memory in a computer device, etc., and the memory may include: a volatile memory, such as a random access memory; the memory may also include: a non-volatile memory, such as a read-only memory, a flash memory, a hard disk or a solid-state drive; the memory may also include: a combination of the above types of memory.

[0142] The processor 1002 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present application. The processor may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0143] The bus 1004 may be an Extended Industry Standard Architecture (EISA) bus, etc. The bus 1004 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0144] Embodiment 5

[0145] Based on the same inventive concept, an embodiment of the present invention further provides a computer program product comprising instructions, wherein when the computer program product is run on a computer device, the computer device executes the helium generation flux calculation method as described in the first embodiment.

[0146] The principles of solving the problems by the above-mentioned devices, media, related equipment and computer program products in the embodiments of the present invention are similar to those of the above-mentioned methods, so their implementation can refer to the implementation of the above-mentioned methods, and the repeated parts will not be repeated.

[0147] Obviously, various changes and modifications may be made to the present invention by those skilled in the art without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various changes and modifications may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A method for calculating helium generation flux, characterized in that: include: Obtain the absolute age, density, area, thickness, porosity, and content of U and Th in the helium source rock in the target area; Based on the contents of U and Th in the helium source rocks and 238 U. 235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content; Based on the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 Initial Th content; Based on helium source rock 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year; Based on the absolute age, density, area, thickness, porosity and number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated.

2. The helium generation flux calculation method according to claim 1, characterized in that: The content of U and Th in the helium source rock and 238 U. 235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content, including: Based on the contents of U and Th in the helium source rocks and 238 U. 235 U and 232 The abundance of Th in nature can be calculated according to Formula 1: 238 U. 235 U and 232 Th content: M = a[X], formula 1; Wherein, [X] is the content of U or Th in the helium source rock; M is the content of the isotope corresponding to U or Th in the current helium source rock; a is the abundance of the isotope corresponding to U or Th in nature.

3. The helium generation flux calculation method according to claim 1, characterized in that: The absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 The initial content of Th includes: Based on the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The Th content in the helium source rock can be calculated according to Formula 2: 238 U. 235 U and 232 Initial Th content: Where M is the current content of the isotope in the helium source rock; N is the initial content of the corresponding isotope in the helium source rock; t is the absolute age of the helium source rock; and T is the half-life of the corresponding isotope in the helium source rock.

4. The helium generation flux calculation method according to claim 1, characterized in that: Based on the helium source rock 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year, including: according to 238 U. 235 U and 232 The radioactive decay law of Th is determined 238 U. 235 U. 232 The number of helium atoms produced during the radioactive decay of Th; based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is used to calculate the number of helium atoms produced by radioactive decay per gram of helium source rock per year.

5. The helium generation flux calculation method according to claim 4, characterized in that: The basis 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is used to calculate the number of helium atoms produced by radioactive decay per gram of helium source rock per year, including: based on 238 U. 235 U. 232 The number of helium atoms produced by Th during its radioactive decay and the number of helium atoms in the helium source rock 238 U. 235 U and 232 The initial content of Th is calculated according to Formula 3 to obtain the number of helium atoms produced by radioactive decay per gram of helium source rock per year: G = k1×N1(N A / A 238U )(e λ1 - 1)+k2×N2(N A / A 235U )(e λ2 - 1)+k3×N3(N A / A 232Th )(e λ3 - 1), Formula 3; Where G is the number of helium atoms produced by radioactive decay per gram of helium source rock per year; k1 is 238 The number of helium atoms produced by U during radioactive decay; k2 is 235 The number of helium atoms produced by U during radioactive decay; k3 is 232 The number of helium atoms produced by Th during radioactive decay; N1 is the number of helium atoms in the helium source rock. 238 The initial content of U; N2 is the content of helium in the source rock 235 The initial content of U; N3 is the content of helium in the source rock 232 Initial content of Th; N A A is Avogadro's constant; 238U for The molar mass of 235U for The molar mass of 232Th for The molar mass of 238 The decay constant of U; λ2 is 235 The decay constant of U; λ3 is 232 The decay constant of Th.

6. The helium generation flux calculation method according to claim 1, characterized in that: The volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the number of helium atoms produced by radioactive decay per gram of helium source rock per year, including: Based on the absolute age, density, area, thickness, porosity and number of helium atoms produced by radioactive decay per gram of helium source rock per year, the volume of helium produced by the helium source rock under standard temperature and pressure conditions is calculated according to Formula 4: V He = G × 10 3 / N A × R × T / × P × t × H × S × ρ × (1 - φ), Formula 4; Where V He is the volume of helium produced by helium source rocks under standard temperature and pressure conditions; N A is Avogadro's constant; R is the molar gas constant; T is the standard temperature; P is the standard atmospheric pressure; t is the absolute age of the helium source rock; H is the thickness of the helium source rock; S is the area of ​​the helium source rock; ρ is the density of the helium source rock; φ is the porosity of the helium source rock.

7. A helium generation flux calculation device, characterized in that: include: An acquisition module is used to obtain the absolute age of the helium source rock in the target area, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the content of U and Th in the helium source rock; The first calculation module is used to calculate the content of U and Th in the helium source rock and 238 U. 235 U and 232 The abundance of Th in nature is calculated to be 238 U. 235 U and 232 Th content; The second calculation module is used to calculate the absolute age of the helium source rock, 238 The half-life of U 235 The half-life of U 232 The half-life of Th and the current helium source rocks 238 U. 235 U and 232 The content of Th in the helium source rock is calculated. 238 U. 235 U and 232 Initial Th content; The third calculation module is used to calculate the 238 U. 235 U and 232 The initial Th content is based on 238 U. 235 U and 232 The radioactive decay law of Th is used to calculate the number of helium atoms produced by radioactive decay of each gram of helium source rock per year; The fourth calculation module is used to calculate the volume of helium produced by the helium source rock under standard temperature and pressure conditions based on the absolute age of the helium source rock, the density of the helium source rock, the area of ​​the helium source rock, the thickness of the helium source rock, the porosity of the helium source rock, and the number of helium atoms produced by radioactive decay per gram of helium source rock per year.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the helium generation flux calculation method according to any one of claims 1 to 6 is implemented.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the helium generation flux calculation method according to any one of claims 1 to 6 is implemented.

10. A computer program product comprising instructions, characterized in that When the computer program product is run on a computer device, the computer device is enabled to execute the helium generation flux calculation method according to any one of claims 1 to 6.

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