CN108663722B - Method for determining external hydrogen index in oil and gas resource evaluation and application thereof - Google Patents
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 159
- 239000001257 hydrogen Substances 0.000 title claims abstract description 159
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 153
- 239000007789 gas Substances 0.000 title claims abstract description 48
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- 238000011160 research Methods 0.000 claims abstract description 12
- 239000003208 petroleum Substances 0.000 claims abstract description 3
- 239000003921 oil Substances 0.000 claims description 61
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- 239000000463 material Substances 0.000 claims description 20
- 230000035800 maturation Effects 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 15
- 239000010426 asphalt Substances 0.000 claims description 12
- 239000010779 crude oil Substances 0.000 claims description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 230000015556 catabolic process Effects 0.000 claims description 5
- 238000006731 degradation reaction Methods 0.000 claims description 5
- 239000003345 natural gas Substances 0.000 claims description 5
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 239000013256 coordination polymer Substances 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 6
- 125000001183 hydrocarbyl group Chemical group 0.000 abstract 1
- 238000011161 development Methods 0.000 description 10
- 238000004364 calculation method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 i.e. Chemical compound 0.000 description 1
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Abstract
The invention providesThe method for determining the external hydrogen index in the oil and gas resource evaluation comprises the following steps: s1, establishing a geological model: determining a basic geological profile of an area to be evaluated through petroleum geology research, wherein the basic geological profile comprises temperature, pressure, a hydrocarbon generation matrix type, a supply form of an external hydrogen source and an action time of the external hydrogen source, and constructing a geological model; s2, carrying out a hydrocarbon generation simulation experiment of a hydrocarbon generation parent substance by adopting the geological model constructed in the step S1, adding an external hydrogen source into an experimental group, adding no external hydrogen source into a control group, and taking the mass ratio of the similar hydrocarbon substances generated by the experimental group and the control group as an external hydrogen index IHE. In the process of generating hydrocarbon by using the hydrocarbon generating parent substance, the hydrocarbon generating potential of the hydrocarbon generating parent substance in different blocks of the hydrocarbon-bearing basin can be more accurately described by considering hydrogen elements except the hydrocarbon generating parent substance.
Description
Technical Field
The invention belongs to the field of petroleum and natural gas exploration, and relates to a method for determining an external hydrogen index in oil and gas resource evaluation and application thereof.
Background
Oil and gas resource evaluation, namely evaluation of the oil production potential of the hydrocarbon parent substances in the oil-gas-containing basin, is the key for judging the exploration and development potential of a block, a structural unit and even the oil-gas-containing basin.
A great deal of research has been conducted on methods for evaluating oil and gas resources by the predecessors. In the prior art, the calculation of the oil and gas resource amount can be divided into two methods: one is indirect or geological-like, and the other is direct. The former takes a basin with higher exploration degree as a standard, obtains an organic carbon conversion coefficient through the relation between all geological reserves and total organic carbon, calculates the hydrocarbon source rock oil production of the basin with similar geological conditions, and evaluates the resource amount of the basin. The latter is based on hydrocarbon source rock hydrocarbon-producing simulation experiment to calculate the oil production of the hydrocarbon source rock.
The main calculation method of the indirect method comprises a chloroform asphalt method, and the calculation formula of the crude oil quantity is as follows:
Q＝H×S×D×B×KB
wherein, Q-oil production (t)
H-crude oil layer thickness (m)
S-oil producing zone area (m)2)
D-Source rock Density (t/m)3)
B-content of Source rock bitumen (%)
KB-conversion factor.
The direct method mainly comprises a mathematical model method for kerogen degradation and the calculation of the oil production by using the pyrolysis simulation result.
The main parameters required by the mathematical model method for kerogen degradation are geological parameters and organic matter parameters. The former is mainly composed of basin sedimentation velocity, surface temperature, ground temperature gradient, rock specific gravity and the like, and the latter mainly comprises kerogen quantity, kerogen type and kerogen hydrocarbon activation energy. The method for calculating the oil production amount by the pyrolysis simulation result comprises the following calculation formula:
wherein: qi-the amount of resources of the ith block within the basin,
Coriginal sourceOriginal organic carbon value of source rock,%,
CP/C-the rate of degradation,
m-source rock thickness in the block, km,
d' -Density of Source rock within Block, 23X 108t/km3，
Q' -amount of basin resources, 108t。
In the above-described oil and gas resource evaluation methods, it is considered that the main substances for producing oil and natural gas, i.e., carbon and hydrogen, are all derived from a hydrocarbon-producing matrix. Thus, the content of organic carbon, i.e. the amount of hydrogen contained in TOC and kerogen, i.e. the hydrogen index I, can be usedHThe hydrocarbon-producing potential of the source rock is evaluated. In the process of calculating the hydrocarbon generation amount of the hydrocarbon source rock, the levels of total organic carbon and a converted substance chloroform bitumen are mainly considered, the hydrogen element is less considered, and the effect of the hydrogen element other than the hydrocarbon generation parent substance is less considered.
In the research at home and abroad, full attention is paid to the commonly used indirect method and direct method, deep research is carried out on the aspects of geological model establishment, calculation method theory and the like, and a plurality of new technologies and new methods are formed. These techniques and methods mainly include: (1) predicting the distribution of the source rock; (2) a geological model for resource evaluation of source rock and (3) a method for resource evaluation of source rock.
In the field of resource evaluation methods for source rocks, patent application No. 201410042090.0 discloses a method for determining the organic carbon content (TOC) of source rocks using experiments and geophysical data, but does not relate to the influence of hydrogen elements other than source rocks on hydrocarbon generation. Patent application No. 201410550854.7 discloses a method for studying the hydrocarbon-producing yield of a hydrocarbon source rock in detail, but the effect of hydrogen element is not discussed in the study.
In areas with simple structures, the oil and gas resource evaluation method plays an important role, and plays a key supporting role in correctly evaluating the oil and gas resource quantity and determining the basin exploration strategy. But in the oil and gas development process, the sum of the yields of crude oil and natural gas of part of basins or blocks is larger than the calculated resource amount. This aspect is related to the progress of exploration and development technology, but also to the limitations of currently applied hydrocarbon resource evaluation methods.
In the existing oil and gas resource evaluation method and the related geological modeling, parameter selection and other methods, the effect of external hydrogen elements on oil and gas formation is rarely considered. However, studies have shown that hydrogen elements other than source rocks, such as H2O and H2Can greatly promote the hydrocarbon-producing capability of the hydrocarbon source rock. At present, research on hydrogen elements except for hydrocarbon source rocks mainly focuses on qualitative description in the field of mechanism research, namely, the process of promoting hydrocarbon generation of the hydrocarbon source rocks by external hydrogen elements is analyzed, and then qualitative or semi-quantitative description is carried out on the influence of the external hydrogen elements on the quantity of oil and gas resources. However, no report is found on how to determine the effect of external hydrogen elements and the influence of the external hydrogen elements on the oil and gas resource amount in the oil and gas resource evaluation process to form an oil and gas resource amount calculation method under the influence of the external hydrogen elements. Therefore, the oil and gas resource evaluation of the oil and gas-containing basin or block of the deep fluid in development by the existing oil and gas resource evaluation method will cause underestimation of the oil and gas resource amount, thereby causing the current situation that the oil and gas yield is greater than the resource amount in a certain deep fluid-developing basin or block.
Disclosure of Invention
In order to more accurately evaluate oil and gas resources, the application provides a concept of an external hydrogen index, which is used for evaluating the contribution degree of an external hydrogen source to hydrocarbon generation of a hydrocarbon generation parent substance. In the process of evaluating the oil gas resources, the external hydrogen index is considered, and the problem that in the prior art, the influence of hydrogen elements except for the raw hydrocarbon parent on the raw hydrocarbon is not considered enough is solved, so that the oil gas resources of deep fluid or deep oil-gas-containing basin can be accurately evaluated.
According to one aspect of the invention, a method for determining an external hydrogen index in oil and gas resource evaluation is provided, which comprises the following steps:
s1, establishing a geological model: determining a basic geological profile of an area to be evaluated through petroleum geology research, wherein the basic geological profile comprises temperature, pressure, a hydrocarbon generation matrix type, a supply form of an external hydrogen source and an action time of the external hydrogen source, and constructing a geological model;
s2, carrying out a hydrocarbon generation simulation experiment of a hydrocarbon generation parent substance by adopting the geological model constructed in the step S1, adding an external hydrogen source into an experimental group, adding no external hydrogen source into a control group, and taking the mass ratio of the similar hydrocarbon substances generated by the experimental group and the control group as an external hydrogen index IHE。
Generally, petrogeology research results include: the temperature and pressure of the hydrocarbon source rock, the age of the hydrocarbon source rock, the type of the hydrocarbon-generating parent substance in the hydrocarbon source rock, whether a substance capable of providing an external hydrogen source is developed in the hydrocarbon source rock layer system, the supply form of the external hydrogen source (hydrogen, hydrogen-containing rock or water), the age, scale, distribution range, the age of the external hydrogen source development, the time when the hydrocarbon-generating parent substance starts to generate hydrocarbon and the like. In the invention, the method for constructing the geological model adopts a method for constructing the geological model commonly used in the field, preferably, the method can refer to a carbonate fracture-cavity type oil reservoir three-dimensional geological modeling method, petroleum and natural gas geology, picnic sun, Liyang and the like, and 6 months in 2013.
According to the invention, the action time of the external hydrogen source is earlier than, simultaneously with or later than the action time of the primary hydrocarbon generating parent substance and the action time of the primary hydrocarbon generating parent substance according to the relationship between the action time of the external hydrogen source on the primary hydrocarbon and the action time of the primary hydrocarbon generating parent substance on the hydrocarbon generating parent substance. The time when the external hydrogen source acts on primary hydrocarbon of the primary hydrocarbon generating parent substance is the era of external hydrogen source development.
According to the invention, the hydrocarbon-bearing matrix types include solid hydrocarbon-bearing matrices and liquid hydrocarbon-bearing matrices. When the hydrocarbon-generating parent substance type is a solid hydrocarbon-generating parent substance, the type and maturity of kerogen also need to be determined; when the hydrocarbon parent material type is a liquid hydrocarbon parent material, the type and viscosity of the crude oil or bitumen need to be determined.
According to the invention, the hydrogen element that can be supplied to the hydrocarbon matrix is mainly H2O and H2。H2Comprises thatGaseous hydrogen and/or solid hydrogen-containing rock. The supply form of the external hydrogen source is determined according to real geological conditions, and if rocks containing more hydrogen elements develop around the hydrocarbon-generating parent substance, the external hydrogen source is the rocks. If hydrogen is developed around the hydrocarbon-bearing matrix, the external source of hydrogen is hydrogen. Typically, the formation contains water, which is a ubiquitous source of external hydrogen.
According to the present invention, the conditions to be controlled during the hydrocarbon generation simulation experiment include temperature, pressure, and time point of addition of an external hydrogen source.
According to the invention, the time point of adding the external hydrogen source is determined by the action time of the external hydrogen source determined in the above step, and the external hydrogen source is added in the low maturation stage, the maturation stage and the over maturation stage of the hydrocarbon-generating matrix. Since the specific hydrocarbon-generating parent substance has different temperatures at the low maturation stage, the maturation stage and the over maturation stage, respectively, the time point of adding the external hydrogen source corresponds to the corresponding temperature point, such as 250 ℃, 400 ℃, 500 ℃ or 600 ℃.
Wherein, the adding in the low-maturity stage in the time point of adding the external hydrogen source indicates that the action time of the external hydrogen source is earlier than the time of the primary hydrocarbon generation of the hydrocarbon generation parent substance; the addition of the external hydrogen source in the maturation stage indicates that the action time of the external hydrogen source is the same as the time for the hydrocarbon parent substance to generate the hydrocarbon substance for the first time; the addition in the over-mature stage indicates that the action time of the external hydrogen source is later than the time of the primary hydrocarbon generation of the hydrocarbon generation parent substance.
In the hydrocarbon generation simulation experiment, generally, the reaction is continued for 48 hours or 72 hours after the temperature reaches the maximum temperature and the temperature is kept constant.
According to the invention, the hydrocarbon generation simulation experiment is carried out by using the existing hydrocarbon generation simulation device and method, such as the device and method described in patent 201110004746.6, 200810101067.9 or 201210292729.1. According to a preferred embodiment of the present invention, hydrocarbon generation simulation experiments were conducted using the apparatus and method described in patent 201210292729.1.
According to the invention, the hydrocarbon material is a liquid hydrocarbon material and/or a gaseous hydrocarbon material.
According to the invention, the external hydrogen index IHEIs a dimensionless constant, and has an external hydrogen index I according to different evaluation targetsHEThe values are different.
The evaluation target is oil resource amount, gas resource amount or oil gas resource amount.
When the evaluation target is the oil resource amount, the mass ratio of the liquid hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE；
When the evaluation target is the gas resource amount, the mass ratio of the gaseous hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE；
When the evaluation target is the oil and gas resource amount, the ratio of the sum of the mass of the liquid hydrocarbon and the gaseous hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE。
When the external hydrogen source is supplied in the form of H2O is, IHEWhen the external source of hydrogen is supplied in the form of gaseous hydrogen and/or solid hydrogen-containing rock, I1HEThe value of (c) is determined according to different geological models by the method described above.
According to another aspect of the present invention, there is provided a hydrocarbon resource evaluation method in which an actual hydrocarbon resource amount in the hydrocarbon resource evaluation is multiplied by an external hydrogen index I on the basis of a hydrocarbon resource amount obtained in an existing hydrocarbon resource evaluation methodHE。
In a preferred embodiment of the invention, the amount of oil and/or gas resources is calculated by formula I or formula II:
formula I: q ═ IHE×H×S×D×B×KB
Wherein: q is the amount of oil produced, t,
IHE-the external hydrogen index,
h-thickness of crude oil layer, m,
s-oil producing zone area, m2，
D-Source rock Density, t/m3，
B-content of source rock bitumen,%,
KB-bitumen conversion factor;
formula II:
wherein: qi-the amount of resources of the ith block within the basin,
IHE-the external hydrogen index,
Coriginal sourceOriginal organic carbon value of source rock,%,
CP/C-the rate of degradation,
m-source rock thickness in the block, km,
d' -Density of Source rock within Block, 23X 108t/km3，
Q' -amount of basin resources, 108t。
It is understood that the term "external hydrogen source" in this application is a term describing the degree of contribution of the external hydrogen source to the hydrocarbon production of the hydrocarbon-producing matrix, and any other terms with similar meanings are within the scope of the claimed invention. In the same way, IHEAny other words having similar meanings for describing the above-mentioned terms are also within the scope of the present invention.
The concept of the external hydrogen index provided by the invention considers hydrogen elements except the hydrocarbon generating parent substance in the process of generating hydrocarbon by the hydrocarbon generating parent substance, thereby solving the problem that the influence of the hydrogen elements except the hydrocarbon generating parent substance on the hydrocarbon is not considered enough in the past, more accurately describing the hydrocarbon generating potential of the hydrocarbon generating parent substance in different blocks of the hydrocarbon-containing basin and improving the conversion rate of hydrocarbon substances of the hydrocarbon generating parent substance, therefore, the potential of oil and gas resources in a certain area can be reflected more truly, and the concept of the external hydrogen index has an important promotion effect on improving the resource potential and the exploration cycle of the hydrocarbon-containing basin.
Detailed Description
The present invention will be described in detail with reference to examples, but the present invention is not limited to the examples.
Example 1
A method for determining an external hydrogen index in oil and gas resource evaluation comprises the following steps:
s1, establishing a geological model: the basic geological profile of the area to be evaluated is determined by geological and petrogeological studies, which in this example include: the method comprises the following steps of establishing a geological model according to geological research, wherein the temperature and pressure of the hydrocarbon source rock, the age of the development of the hydrocarbon source rock, the type of the hydrocarbon-generating parent material in the hydrocarbon source rock, whether a substance capable of providing an external hydrogen source is developed in a hydrocarbon source rock layer system, the state of the external hydrogen source (hydrogen, hydrogen-containing rock or water), the age, the scale, the distribution range, the age of the development of the external hydrogen source, the time when the hydrocarbon-generating parent material starts to generate hydrocarbon and the like are determined, and further determining the temperature, the pressure, the form of the external hydrogen source, the action time of the external hydrogen source and the like in the hydrocarbon-generating parent material hydrocarbon simulation experiment.
S2, carrying out a hydrocarbon generation simulation experiment of a hydrocarbon generation parent substance by adopting the geological model constructed in the step S1, adding an external hydrogen source into an experimental group, adding no external hydrogen source into a control group, and taking the mass ratio of the similar hydrocarbon substances generated by the experimental group and the control group as an external hydrogen index IHE。
The time when the external hydrogen source acts on the primary and secondary hydrocarbons of the primary hydrocarbon generating parent substance can be divided into the time before, at the same time or after the time when the primary hydrocarbon generating parent substance generates the hydrocarbon substances by taking the time node when the primary hydrocarbon generating parent substance generates the hydrocarbon substances as a boundary. The time when the external hydrogen source acts on primary hydrocarbon of the primary hydrocarbon generating parent substance is the era of external hydrogen source development.
In this example, the conditions to be controlled during the hydrocarbon generation simulation experiment included temperature, pressure and the time point of addition of an external hydrogen source.
According to the invention, the time point of adding the external hydrogen source is determined by the action time of the external hydrogen source determined in the above step, and the external hydrogen source is added in the low maturation stage, the maturation stage and the over maturation stage of the hydrocarbon-generating matrix. Since the specific hydrocarbon-generating parent substance has different temperatures at the low maturation stage, the maturation stage and the over maturation stage, respectively, the time point of adding the external hydrogen source corresponds to the corresponding temperature point, such as 250 ℃, 400 ℃, 500 ℃ or 600 ℃.
Wherein, the adding in the low-maturity stage in the time point of adding the external hydrogen source indicates that the action time of the external hydrogen source is earlier than the time of the primary hydrocarbon generation of the hydrocarbon generation parent substance; adding the catalyst in the maturation stage to indicate the action time of the external hydrogen source and the time for the hydrocarbon parent material to generate the hydrocarbon material for the first time; the addition in the over-mature stage indicates that the action time of the external hydrogen source is later than the time of the primary hydrocarbon generation of the hydrocarbon generation parent substance.
In the hydrocarbon generation simulation experiment, generally, the reaction is continued for 48 hours or 72 hours after the temperature is constant after the temperature reaches the maximum temperature.
Hydrocarbon parent types include solid hydrocarbon parent and liquid hydrocarbon parent. When the hydrocarbon-generating parent substance type is a solid hydrocarbon-generating parent substance, the type and maturity of kerogen also need to be determined; when the hydrocarbon parent material type is a liquid hydrocarbon parent material, the type and viscosity of the crude oil or bitumen need to be determined.
The hydrogen element which can be supplied to the hydrocarbon matrix is mainly H2O and H2。H2Including gaseous hydrogen and/or solid hydrogen-bearing rocks. The supply form of the external hydrogen source is determined according to real geological conditions, and if rocks containing more hydrogen elements develop around the hydrocarbon-generating parent substance, the external hydrogen source is the rocks. If hydrogen is developed around the hydrocarbon-bearing matrix, the external source of hydrogen is hydrogen. Typically, the formation contains water, which is a ubiquitous source of external hydrogen. When the external hydrogen source is supplied in the form of H2O is, IHE＝1。
Wherein the hydrocarbon material is liquid hydrocarbon material and/or gaseous hydrocarbon material.
Wherein the external hydrogen index IHEIs a dimensionless constant, and has an external hydrogen index I according to different evaluation targetsHEThe values are different.
The evaluation target is oil resource amount, gas resource amount or oil gas resource amount.
When the evaluation target is the amount of oil resources, the experimental groups andthe mass ratio of the liquid hydrocarbon product produced by the control group is the external hydrogen index IHE；
When the evaluation target is the gas resource amount, the mass ratio of the gaseous hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE；
When the evaluation target is the oil and gas resource amount, the ratio of the sum of the mass of the liquid hydrocarbon and the gaseous hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE。
By adopting the technology provided by the invention, experimental research is carried out on a certain volcanic rock block developing in a hydrocarbon-containing basin. Because volcanic rock can provide external hydrogen as an external hydrogen source for the hydrocarbon parent substance through different ways, the development time of the volcanic rock is the same as the primary hydrocarbon generation time of the hydrocarbon parent substance, in addition, the action of the volcanic rock can provide enough hydrogen elements for the hydrocarbon parent substance, through simulation experiment research, the hydrocarbon parent substance with the same type, when the action of the external hydrogen element is considered, IHE1.4, the oil content was evaluated using formula I,
formula I: q ═ IHE×H×S×D×B×KB
Wherein: q is the amount of oil produced, t,
IHE-the external hydrogen index,
h-thickness of crude oil layer, m,
s-oil producing zone area, m2，
D-Source rock Density, t/m3，
B-content of source rock bitumen,%,
KB-bitumen conversion factor.
After the influence of the external hydrogen source is considered, the oil resource amount of the region is 1.4 times that of the region without the influence of the external hydrogen source, which shows that the technology provided by the invention can accurately describe the resource amount of the oil-containing basin.
Although the invention has been described above with reference to a number of embodiments, it will be appreciated that various modifications can be made without departing from the scope of the invention, and that features of the various embodiments disclosed herein can be used in any combination, and the lack of exhaustive description of such combinations in this specification is merely for reasons of brevity and resource saving. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A method for determining an external hydrogen index in oil and gas resource evaluation comprises the following steps:
s1, establishing a geological model: determining a basic geological profile of an area to be evaluated through petroleum geology research, wherein the basic geological profile comprises temperature, pressure, a hydrocarbon generation matrix type, a supply form of an external hydrogen source and an action time of the external hydrogen source, and constructing a geological model;
s2, carrying out a hydrocarbon generation simulation experiment of a hydrocarbon generation parent substance by adopting the geological model constructed in the step S1, adding an external hydrogen source into an experimental group, adding no external hydrogen source into a control group, and taking the mass ratio of the similar hydrocarbon substances generated by the experimental group and the control group as an external hydrogen index IHE。
2. The method of claim 1, wherein in the hydrocarbon generation simulation experiment, the experimental conditions to be controlled include temperature, pressure and time point of adding external hydrogen source.
3. The method of claim 1, wherein the hydrocarbon-generating matrix types include a solid hydrocarbon-generating matrix and a liquid hydrocarbon-generating matrix, and when the hydrocarbon-generating matrix type is a solid hydrocarbon-generating matrix, the type and maturity of kerogen are determined; when the hydrocarbon parent material type is a liquid hydrocarbon parent material, the type and viscosity of the crude oil or bitumen need to be determined.
4. The method of claim 1, wherein the external source of hydrogen is supplied in a form comprising H2O, gaseous hydrogen and/or solid hydrogen-containing rock; the supply form of the external hydrogen source is determined according to real geological conditions, when rocks containing hydrogen elements develop around the hydrocarbon-generating parent substance, the external hydrogen source is the rocks containing hydrogen, and when the hydrocarbon-generating parent substance develops, the external hydrogen source is the rocks containing hydrogen elementsWhen hydrogen is developed around the proton, the external hydrogen source is hydrogen.
5. The method of claim 1, wherein the timing of the external hydrogen source is determined according to the relationship between the time of the external hydrogen source acting on the hydrocarbon-generating parent substance for the first time and the time of the hydrocarbon-generating parent substance for the first time to generate the hydrocarbon substance, and is earlier than, simultaneous with or later than.
6. The method as claimed in any one of claims 2 to 5, wherein the time point of adding the external hydrogen source is at a low maturation stage, a maturation stage or an over maturation stage of the hydrocarbon-producing matrix according to the determined action time of the external hydrogen source.
7. The method according to any one of claims 1 to 5, wherein the hydrocarbon material is a liquid hydrocarbon material and/or a gaseous hydrocarbon material.
8. The method according to any one of claims 1 to 5, wherein the external hydrogen index IHEIs a dimensionless constant, and has an external hydrogen index I according to different evaluation targetsHEThe values are different:
when the evaluation target is crude oil reserves, the mass ratio of the liquid hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE；
When the evaluation target is natural gas reserves, the mass ratio of the gaseous hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE；
When the evaluation target is oil gas reserves, the ratio of the sum of the masses of the liquid hydrocarbon and the gaseous hydrocarbon products generated by the experimental group and the control group is the external hydrogen index IHE。
9. A method for evaluating oil and gas resources, characterized in that the actual oil and gas resource amount in the oil and gas resource evaluation is obtained by multiplying the external hydrogen index of any one of claims 1 to 8 on the basis of the oil and gas resource amount obtained by the existing oil and gas resource evaluation methodIHE。
10. The hydrocarbon resource evaluation method of claim 9, wherein the amount of oil and/or gas resources is calculated by formula I or formula II:
formula I: q ═ IHE×H×S×D×B×KB
Wherein: q is the amount of oil produced, t,
IHE-the external hydrogen index,
h-thickness of crude oil layer, m,
s-oil producing zone area, m2，
D-Source rock Density, t/m3，
B-content of source rock bitumen,%,
KB-bitumen conversion factor;
formula II:
wherein: qi-the amount of resources of the ith block within the basin,
IHE-the external hydrogen index,
Coriginal sourceOriginal organic carbon value of source rock,%,
CP/C-the rate of degradation,
m-source rock thickness in the block, km,
d' -Density of Source rock within Block, 23X 108t/km3，
Q' -amount of basin resources, 108t。
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