CN111338001A - Helium gas reservoir exploration method - Google Patents
Helium gas reservoir exploration method Download PDFInfo
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- CN111338001A CN111338001A CN202010189239.3A CN202010189239A CN111338001A CN 111338001 A CN111338001 A CN 111338001A CN 202010189239 A CN202010189239 A CN 202010189239A CN 111338001 A CN111338001 A CN 111338001A
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Abstract
The invention relates to the technical field of oil field exploration and development, in particular to a helium gas reservoir exploration method. The method comprises the following steps: the method comprises the following steps: determining whether radiation anomaly and natural gas reservoir or underground water resources exist in the research area at the same time; analyzing the helium content in the natural gas reservoir or the underground water resource, judging whether the helium resource in the research area meets the national industrial exploitation standard, and performing the next step if the helium resource meets the national industrial exploitation standard; analysing natural gas reservoirs or groundwater resources3He and4he content to determine the helium source; if helium is mainly from mantle source, finding effective trap near deep fracture; if the helium is mainly the shell source, searching for an effective trap near the igneous rock mass; and if the helium is a shell mantle mixed source, the first two types of determination searching ranges are integrated to perform integrated searching. The method can be used for quantitative exploration according to different situations containing helium, and is beneficial to efficient exploration of helium gas reservoirs.
Description
Technical Field
The invention relates to the technical field of oil field exploration and development, in particular to a helium gas reservoir exploration method.
Background
Helium is an inert gas, is rarely combined with other chemical elements, is widely applied to the high-tech fields such as national defense industry, aerospace industry, nuclear industry, clinical medicine, chemical industry and the like due to the special physicochemical properties, particularly the liquid characteristic and chemical property inertness at low temperature, is a basic material for the development of national safety and high-tech industries, belongs to strategic resources, has large demand for helium in various countries around the world, particularly Asian regions including China, is the region with the fastest increase of helium demand, and has the total sale amount of helium of 169 × 10 in 2005, wherein the total sale amount of helium is 169 × 104m3Increases to 320 × 104m3。
Along with the rapid development of the Chinese technological level and economy, the demand of helium is more and more increased in recent years, but because of the shortage of the helium resource in China, the purification cost of helium is higher, and the domestic demand can be met only by the imported helium all the time. China is in the period of rapid development of comprehensive national force, the demand of helium in military industry, scientific research or daily life is increasing day by day, once helium is not available, the work cannot be carried out, the development of Chinese economy is seriously influenced, and even the safety of the country is influenced. Therefore, the method increases the exploration strength of the helium gas reservoir and is a main means for solving the shortage of helium resources in China. At present, the helium exploration mainly adopts a qualitative exploration method, the systematic quantitative research is lacked, and the patent fills the blank.
Disclosure of Invention
The invention aims to provide an exploration method for helium gas reservoirs, which achieves the quantitative standard and establishes the exploration method suitable for various helium gas reservoirs.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for exploring a helium gas reservoir, which comprises the following steps:
step 1, determining whether radiation anomaly and natural gas reservoir or underground water resources exist in a research area at the same time;
step 2, analyzing the helium content in the natural gas reservoir or the underground water resource, judging whether the helium resource in the research area meets the national industrial exploitation standard, and performing the next step if the helium resource in the research area meets the national industrial exploitation standard;
step 3, analyzing natural gas reservoir or underground water resource3He and4he content to determine the helium source;
step 4, according to the result of the step 3, if helium is mainly a mantle source, effective traps near deep fractures are found; if the helium is mainly the shell source, searching for an effective trap near the igneous rock mass; and if the helium is a shell mantle mixed source, the first two types of determination searching ranges are integrated to perform integrated searching.
The invention can also be realized by the following technical scheme:
in the step 1, adopting gravity, magnetism, remote sensing data and geochemical analysis data to search and analyze a gradient zone with abnormal changes of magnetism and gravity; and searching for the abnormal radiation area by adopting a ground gas measurement or gamma energy spectrum measurement method.
And determining that the natural gas reservoir or underground water resource exists in the area according to the three-dimensional seismic data, the logging data and the analysis and analysis data.
In step 3, the isotope ratio of sample helium R and atmospheric helium Ra is used to determine the helium source:
when R/Ra is more than 1, helium is mantle source helium;
when R/Ra is more than 0.1 and less than 1, helium is shell mantle mixed source helium;
shell source helium when R/Ra < 0.1.
In step 4, if helium is mainly a mantle source, calculating a search radius A according to the following formula, and searching for effective traps near deep fractures;
A＝N/α
where N is a regional parameter related to the geological conditions of the region and the nature of the natural gas reservoir or groundwater resources and α is the helium content.
In step 4, if the helium is mainly the shell source, calculating a search radius B according to the following formula, and searching for effective traps near the igneous rock mass;
B＝N/α
where N is a regional parameter related to the geological conditions of the region and the nature of the natural gas reservoir or groundwater resources and α is the helium content.
In step 4, if helium is a shell mantle mixed source, calculating a search radius C according to the following formula, and searching for an effective trap near a deep fracture and igneous rock mass;
C＝N/α
where N is a regional parameter related to the geological conditions of the region and the nature of the natural gas reservoir or groundwater resources and α is the helium content.
The invention has the following beneficial effects:
the invention relates to a helium gas reservoir exploration method, which mainly aims at analyzing favorable exploration areas of a helium gas reservoir and carrying out quantitative exploration according to different situations containing helium. The method is beneficial to efficiently exploring the helium gas reservoir, and the target area of the helium gas reservoir is represented under different causes and different occurrence conditions, so that a research basis is provided for the helium gas exploration. Has profound significance for guiding helium exploration.
Drawings
FIG. 1 is a flow chart of one embodiment of a method of the present invention for exploring a helium gas reservoir;
FIG. 2 is a schematic view of a curtain source gas survey;
FIG. 3 is a schematic illustration of a shell source gas survey;
FIG. 4 is a schematic illustration of a shell mantle source gas exploration.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
The instruments, reagents, materials and the like used in the following examples are conventional instruments, reagents, materials and the like in the prior art and are commercially available in a normal manner unless otherwise specified. Unless otherwise specified, the experimental methods, detection methods, and the like described in the following examples are conventional experimental methods, detection methods, and the like in the prior art.
Examples
FIG. 1 is a flow chart of a method of exploration for a helium gas reservoir of the present invention, as shown in FIG. 1.
In step 101-1, a gradient zone of abnormal change of magnetic force and gravity is searched by using aeromagnetic data and gravity data, the gradient zone is analyzed, and a radioactive abnormal area is searched in a potential exploration area by adopting methods such as geogas measurement, gamma energy spectrum measurement and the like;
in step 101-2, determining that natural gas reservoirs or underground water resources exist in the area according to the three-dimensional seismic data, the logging data and the analysis and analysis data, and the process enters step 102;
in step 102, analyzing the natural gas reservoir or underground water resource meeting the conditions by an analytical method such as geochemistry, determining the helium content α in the natural gas reservoir or underground water resource by adopting a conventional non-hydrocarbon gas detection means, and then, the flow goes to step 103-1;
in step 103, determining whether the sample contains helium with research value, namely helium with sample concentration meeting national industrial mining standards, if the sample does not contain helium with research value, the process returns to step 101-2, and if the sample contains helium with research value, the process returns to step 104;
at step 104, the helium composition is analyzed to determine He therein3And He4The flow proceeds to step 105;
at step 105, according to3He/4He ratio can be summarized as mantle source helium, shell source helium and mixed source helium, using sample helium3He/4Of He value (R) in comparison with atmospheric helium3He/4He value (Ra) represents the characteristic of a gas-like helium isotope, i.e., R/Ra ═ c (a)3He/4He)Sample (I)/(3He/4He)Atmosphere (es)。
When the (R/Ra) > 1, the mantle source helium content in the gas sample is more than 12 percent, and the helium is the mantle source helium; when the content of the mantle source helium is more than 1.2 percent when the content is 0.1< (R/Ra) <1, the helium is the shell mantle mixed source helium;
when (R/Ra) <0.1, it can be said that helium in natural gas is substantially derived from a shell source, and is helium gas.
If helium is mantle source helium, the flow enters a step 106-1, if helium is shell source helium, the flow enters a step 106-2, if helium is mixed source helium, the flow enters a step 106-3;
in step 106-1, if helium is determined to be valance source helium, then a valid trap is searched near the deep fracture (fig. 2), the searched radius a is related to the helium content α determined in step 102, and the formula a is N/α, where N is a regional parameter related to the geological conditions of the region and the properties of the natural gas reservoir or the underground water resource.
In step 106-2, if it is determined that the helium gas is the shell source helium gas, then a valid trap is searched for in the vicinity of the igneous rock mass (fig. 3), and the searched radius B is related to the helium gas content α determined in step 102, and satisfies the formula B ═ N/α, where N is a regional parameter related to the geological conditions of the region and the properties of the natural gas reservoir or the underground water resource.
In step 106-3, if helium is determined to be mixed source helium, then an effective trap is searched for near the deep fracture and igneous rock mass (fig. 4), the searched radius C is related to the helium content α determined in step 102, and the formula C ═ N/α is satisfied, wherein N is a regional parameter related to the geological conditions of the region and the properties of the natural gas reservoir or the underground water resource.
The exploration method for the helium gas reservoir mainly aims at the helium gas reservoir, and is mainly used for analyzing a favorable exploration area of the helium gas reservoir and carrying out quantitative exploration according to different conditions of helium. The method is beneficial to efficiently exploring the helium gas reservoir, and the target area of the helium gas reservoir is represented under different causes and different occurrence conditions, so that a research basis is provided for the helium gas exploration. The method is suitable for various helium gas reservoirs and has profound significance for guiding helium exploration. The research result is unique and innovative and can fill the blank of domestic and foreign research.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (7)
1. A method of exploring a helium gas reservoir, the method comprising:
step 1, determining whether radiation anomaly and natural gas reservoir or underground water resources exist in a research area at the same time;
step 2, analyzing the helium content in the natural gas reservoir or the underground water resource, judging whether the helium resource in the research area meets the national industrial exploitation standard, and performing the next step if the helium resource in the research area meets the national industrial exploitation standard;
step 3, analyzing natural gas reservoir or underground water resource3He and4he content to determine the helium source;
step 4, according to the result of the step 3, if helium is mainly a mantle source, effective traps near deep fractures are found; if the helium is mainly the shell source, searching for an effective trap near the igneous rock mass; and if the helium is a shell mantle mixed source, the first two types of determination searching ranges are integrated to perform integrated searching.
2. The exploration method according to claim 1, wherein in step 1, gravity, magnetism, remote sensing data and geochemical analysis data are adopted to search and analyze the gradient zone of abnormal change of magnetism and gravity; and searching for the abnormal radiation area by adopting a ground gas measurement or gamma energy spectrum measurement method.
3. The method of claim 1, wherein the presence of natural gas or groundwater resources in the region is determined based on three-dimensional seismic data, logging data, and analytical assay data.
4. The method of surveying as claimed in claim 1, wherein in step 3, the isotopic ratio of sample helium R and atmospheric helium Ra is used to determine the helium source:
when R/Ra is more than 1, helium is mantle source helium;
when R/Ra is more than 0.1 and less than 1, helium is shell mantle mixed source helium;
shell source helium when R/Ra < 0.1.
5. The method of claim 1, wherein in step 4, if helium is predominantly mantle-source, the search radius a is calculated according to the following formula, searching for effective traps near deep fractures;
A＝N/α
where N is a regional parameter related to the geological conditions of the region and the nature of the natural gas reservoir or groundwater resources and α is the helium content.
6. The method of claim 1, wherein in step 4, if the helium is dominant in the shell source, the search radius B is calculated according to the following formula to search for effective traps near the igneous rock mass;
B＝N/α
where N is a regional parameter related to the geological conditions of the region and the nature of the natural gas reservoir or groundwater resources and α is the helium content.
7. The method of claim 1, wherein in step 4, if helium is a mixed source of the shell mantle, the search radius C is calculated according to the following formula to find an effective trap near the deep fracture and igneous rock mass;
C＝N/α
where N is a regional parameter related to the geological conditions of the region and the nature of the natural gas reservoir or groundwater resources and α is the helium content.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114910976A (en) * | 2022-04-18 | 2022-08-16 | 中国科学院西北生态环境资源研究院 | Geological evaluation method for helium resource potential in low-exploration-degree area |
| CN115221675A (en) * | 2022-05-18 | 2022-10-21 | 中国石油天然气集团有限公司 | Helium gas resource scale sequence determination method, device and equipment |
| CN115685377A (en) * | 2022-10-17 | 2023-02-03 | 中国石油天然气集团有限公司 | Helium gas cause resource evaluation method and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114910976A (en) * | 2022-04-18 | 2022-08-16 | 中国科学院西北生态环境资源研究院 | Geological evaluation method for helium resource potential in low-exploration-degree area |
| CN114910976B (en) * | 2022-04-18 | 2023-08-15 | 中国科学院西北生态环境资源研究院 | Geological evaluation method for helium resource potential in low exploration degree area |
| CN115221675A (en) * | 2022-05-18 | 2022-10-21 | 中国石油天然气集团有限公司 | Helium gas resource scale sequence determination method, device and equipment |
| CN115221675B (en) * | 2022-05-18 | 2024-03-01 | 中国石油天然气集团有限公司 | Helium resource scale sequence determination method, device and equipment |
| CN115685377A (en) * | 2022-10-17 | 2023-02-03 | 中国石油天然气集团有限公司 | Helium gas cause resource evaluation method and device |
| CN115685377B (en) * | 2022-10-17 | 2023-05-19 | 中国石油天然气集团有限公司 | Helium cause resource evaluation method and device |
| WO2024082401A1 (en) * | 2022-10-17 | 2024-04-25 | 中国石油天然气集团有限公司 | Helium genesis resource evaluation method and apparatus |
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