Method and device for calculating reservoir helium saturation while drilling and evaluating helium layer while drilling

Abstract

The application discloses a method and device for calculating reservoir helium saturation while drilling and evaluating helium layers while drilling. The method comprises the following steps: determining the rock volume of a broken unit footage during drilling based on drilling data in logging data; determining the total circulating volume of drilling fluid consumed by the rock volume of the broken unit footage during drilling based on drilling data; determining the ground helium content obtained by the rock volume of the broken unit footage according to helium logging data and the total circulating volume of drilling fluid; determining the formation helium content obtained by the rock volume of the broken unit footage according to formation physical parameters, drilling data and the ground helium content; and determining the reservoir helium saturation during drilling based on the rock volume of the broken unit footage, the formation helium content obtained by the rock volume of the broken unit footage, logging data and a calculation relationship formula of reservoir helium saturation. The method can measure the helium saturation during drilling, and further quickly evaluate the helium production capacity of a reservoir.

Description

Technical Field

[0001] This invention relates to the field of reservoir interpretation and evaluation technology, and in particular to methods and apparatus for calculating helium saturation in drilling reservoirs and evaluating helium layers during drilling. Background Technology

[0002] Helium is an important strategic rare resource. By separating helium from natural gas and conducting a series of laboratory analyses, we can make a macro-evaluation of the source and exploration prospects of helium, as well as clarify the regional enrichment characteristics and reservoir conditions of helium. The following are some studies on helium resources in recent years: Some researchers have analyzed the helium enrichment characteristics and reservoir conditions in the northwestern Tarim Basin through oil drilling and testing data; some researchers have explored and established well logging identification methods and interpretation standards for dissolved helium in helium-rich natural gas layers in the Weihe Basin by selecting technologies such as well logging three-porosity and Pe intersection, neutron and potassium content intersection, and thermal neutron imaging logging (TNIS); other researchers have analyzed and concluded that the helium content in 21 natural gas samples, including the Dongping 1 and Dongping 3 well areas of the Dongping gas field in the Qaidam Basin and the Jiantan 1 well area of ​​the Jiandingshan gas field, is greater than 0.05%, reaching the industrial standard, with the minimum value being 0.075%, the maximum value being 1.069%, and the average value being 0.386%; still other researchers have studied the current research status and prospects of helium resources in natural gas, clarifying that helium-rich natural gas has the characteristics of many locations, many types, and good resource prospects, but the overall research level of helium resources is very low.

[0003] Helium evaluation methods involve calculating helium saturation and content. Helium content is typically determined using experimental analytical methods such as gravimetric analysis, manometry, geophysical analysis, and geochemical analysis. Each method has its applicable conditions and advantages. Gravimetric and manometry methods are based on the free state equation and instrument principles, estimating helium content by measuring vacant volume and pressure changes. Gravimetric analysis is suitable for directly measuring the volume of helium in a sample, while manometry is better suited for analyzing volume changes in helium within closed systems. The application of these methods requires precise experimental equipment and strict operating procedures to ensure data accuracy and reliability. Rock physical analysis, by studying the physical properties of rock cores, such as porosity and permeability, can indirectly assess the helium content in reservoirs. This method usually requires combining other geological and geophysical data, such as stratigraphic thickness, depth, and temperature, to obtain more accurate analytical results. Furthermore, geochemical methods are also important means of exploring helium distribution, involving the analysis of the distribution characteristics of helium isotopes in the Earth's crust and the migration and enrichment patterns of helium related to tectonic activity.

[0004] Helium, as a rare gas, is important for assessing helium production capacity and calculating helium reserves. However, methods for measuring helium saturation are not widely available, and determining helium saturation is a complex but crucial process involving the integrated application of various scientific technologies and methods. Currently, the method for measuring helium saturation is based on theoretical analysis of laboratory measurement data, followed by numerical simulation; this is also a laboratory analysis method. Summary of the Invention

[0005] In recent years, helium resource assessment methods have shifted from laboratory analysis to drilling analysis. However, without testing and production at a single well, formation helium production capacity cannot be determined, making it impossible to analyze and calculate helium saturation. Relying solely on past helium saturation data from test wells for simple laboratory analysis is insufficient for accurately evaluating helium reservoir layers and calculating helium reserves. Currently, there is a lack of research on rapid helium assessment methods for reservoirs during drilling. In conclusion, existing laboratory analysis methods are insufficient for helium production capacity assessment. Research is needed on helium saturation calculation methods based on formation characterization parameters collected during drilling, establishing formulas for calculating reservoir helium saturation, and comprehensively analyzing helium saturation using various formation characterization parameters during drilling to achieve rapid and accurate assessment of helium reservoirs during drilling.

[0006] In view of the above problems, the present invention is proposed to provide a method and apparatus for monitoring early overflow leakage under throttling cycle conditions that overcomes or at least partially solves the above problems.

[0007] In a first aspect, embodiments of the present invention provide a method for determining helium saturation in a drilling reservoir, comprising:

[0008] Based on the logging data collected during drilling, the volume of rock broken per unit footage during drilling is determined. The logging data also includes helium logging data and formation physical parameters.

[0009] Based on the drilling data, determine the total amount of drilling fluid consumed in circulation within the time required to break a unit footage of rock volume during the drilling process.

[0010] The surface helium content is determined by the volume of rock broken per unit depth based on helium logging data and total drilling fluid circulation.

[0011] The formation helium content is determined by the volume of rock broken per unit footage based on formation physical parameters, drilling data, and surface helium content.

[0012] Based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the collected logging data, and the pre-established calculation formula for reservoir helium saturation, the reservoir helium saturation during drilling is determined.

[0013] In some optional embodiments, the volume of rock per unit footage of breaking during drilling is determined based on the drilling data from the acquired logging data, including:

[0014] Based on the collected wellbore radius and the unit footage during drilling, the volume of rock broken per unit footage during drilling is determined.

[0015] The volume of rock per unit advance in crushing is expressed by the following expression:

[0016] v = πr 2 ×h,

[0017] Where V is the volume of rock broken per unit depth, r is the borehole radius, and h is the depth per unit depth.

[0018] In some optional embodiments, the total amount of drilling fluid circulated during the time required to break a unit footage of rock volume during drilling is determined based on drilling data, including:

[0019] Based on the collected drilling fluid discharge, drilling speed and per unit footage, determine the total amount of drilling fluid consumed in circulation within the time required to break the rock volume per unit footage during the drilling process.

[0020] The total volume of drilling fluid circulating is expressed by the following expression:

[0021]

[0022] Among them, Q 总 denoted as the total drilling fluid circulation volume, Q as the drilling fluid pump displacement at the drilling depth, and s as the drilling rate at the drilling depth.

[0023] In some optional embodiments, the surface helium content obtained by determining the rock volume per unit footage of fracturing, based on helium logging data and total drilling fluid circulation, includes:

[0024] The ground helium concentration is determined by the collected helium concentration and degassing efficiency to determine the rock volume per unit advance of the crushing process.

[0025] Based on the relationship between the total drilling fluid circulation volume, the collected helium concentration, and the surface helium concentration obtained from the rock volume per unit footage of breaking, the surface helium content obtained from the rock volume per unit footage of breaking is determined.

[0026] In some alternative embodiments, the ground helium concentration obtained per unit footage of rock crushing is expressed by the following expression:

[0027] C = He × η

[0028] Where C is the ground helium concentration obtained from the rock volume per unit advance of crushing, He is the collected helium concentration, and η is the degassing efficiency.

[0029] The relationship between the total drilling fluid circulation volume, the collected helium concentration, and the surface helium content obtained from the rock volume per unit drilling depth is expressed as:

[0030]

[0031] The ground helium content obtained from the rock volume per unit cutting advance is determined by the following expression:

[0032]

[0033] Among them, V 表 The ground helium content is obtained from the volume of rock broken per unit advance.

[0034] In some optional embodiments, the formation helium content is calculated based on formation physical properties, drilling data, and surface helium content, including:

[0035] The formation helium content is determined by the volume of rock broken per unit depth based on formation temperature, surface drilling fluid temperature, formation pressure, atmospheric pressure, and surface helium content.

[0036] The formation helium content is expressed by the following expression:

[0037]

[0038] Among them, V 层 The formation helium content is the volume of rock broken per unit advance, where P is atmospheric pressure and V is the density of the rock. 表 T represents the surface helium content obtained from the volume of rock crushed per unit advance. 层 For formation temperature, P 层 Where is the formation pressure, and T is the surface drilling fluid temperature.

[0039] In some optional embodiments, the reservoir helium saturation during drilling is determined based on the rock volume per unit footage of fracturing, the formation helium content obtained from the rock volume per unit footage of fracturing, the acquired logging data, and a pre-established formula for calculating reservoir helium saturation, including:

[0040] The pre-established formula for calculating reservoir helium saturation is expressed by the following expression:

[0041]

[0042] Among them, S H The reservoir helium saturation. Rock porosity;

[0043] The rock volume per unit depth of the fractured rock, the formation helium content obtained from the rock volume per unit depth of the fractured rock, and the collected logging data are applied to the pre-established formula for calculating formation helium saturation to determine the formation helium saturation during drilling.

[0044] Secondly, embodiments of the present invention provide a method for evaluating helium reservoirs while drilling, implemented based on the above-mentioned method for determining helium saturation in reservoirs while drilling, including:

[0045] Collect logging data, formation physical parameters, and well logging data during the drilling process of the target well;

[0046] The helium saturation of the reservoir during drilling is determined based on logging data, formation physical parameters, and well logging data. The determination of helium saturation is based on the above-mentioned method for determining the helium saturation of the reservoir during drilling.

[0047] Based on the reservoir helium saturation, the helium concentration in the reservoir included in the logging data, and the pre-established helium layer evaluation criteria, the reservoir is interpreted as a helium layer during the drilling process.

[0048] In some optional embodiments, the process for establishing helium layer evaluation criteria includes:

[0049] Using the preset helium layer evaluation index concentration and the pre-established drilling helium concentration correction model, the corresponding drilling helium concentration is obtained.

[0050] Based on the calculation formula of helium concentration during drilling and the pre-established formation helium saturation, the formation helium saturation at this helium concentration during drilling is obtained.

[0051] Based on the helium concentration during drilling corresponding to the helium index concentration and the formation helium saturation at that helium concentration, a helium layer evaluation standard is established.

[0052] In some optional embodiments, a drilling helium concentration correction model is established, including:

[0053] Collect wellhead gas samples from multiple producing gas wells in the target exploration area and analyze the wellhead helium concentration in the wellhead gas samples; and collect the helium concentration during drilling in the production section of the producing gas wells.

[0054] Linear regression analysis was performed on the wellhead helium concentration and the helium concentration during drilling in the production well section to establish the regression relationship between the wellhead helium concentration and the helium concentration during drilling.

[0055] The regression relationship was used as a drilling helium concentration correction model.

[0056] The regression relationship is expressed by the following formula: Wellhead helium concentration = Helium concentration during drilling * Linear regression coefficient.

[0057] In some optional embodiments, the corresponding helium concentration during drilling is obtained using a preset helium layer evaluation index concentration and a pre-established helium concentration correction model during drilling, including:

[0058] The pre-set helium layer evaluation index concentration is used as the wellhead helium concentration in the drilling helium concentration correction model.

[0059] The corresponding helium concentration while drilling is calculated using the helium concentration correction model while drilling.

[0060] In some optional embodiments, a helium layer evaluation standard is established based on the helium concentration while drilling corresponding to the helium concentration for the helium layer evaluation index and the formation helium saturation at that helium concentration, including:

[0061] Based on the helium concentration during drilling corresponding to the helium layer evaluation index concentration, a lower limit for the interpretation standard of helium concentration is established.

[0062] Based on the formation helium saturation at this drilling helium concentration, a lower limit for interpreting reservoir helium saturation is established.

[0063] In some optional embodiments, helium layer interpretation of the reservoir during drilling is performed based on helium saturation, reservoir helium concentration included in logging data, and pre-established helium layer evaluation criteria, including:

[0064] If the peak value of the reservoir helium concentration and the corresponding reservoir helium saturation are both not less than the helium layer evaluation standard, the formation is interpreted as a helium-rich layer.

[0065] If the peak value of the reservoir helium concentration and the corresponding reservoir helium saturation are both less than the helium layer evaluation standard, the formation is interpreted as a helium-poor layer.

[0066] Thirdly, embodiments of the present invention provide a device for determining the helium saturation of a drilling reservoir, comprising:

[0067] The volume determination module is used to determine the volume of rock broken per unit footage during drilling based on the drilling data in the collected logging data. The logging data also includes helium logging data and formation physical parameters.

[0068] The drilling fluid determination module is used to determine the total amount of drilling fluid required to break the rock volume per unit footage during the drilling process based on the drilling data.

[0069] The helium content determination module is used to determine the surface helium content obtained by breaking up the rock volume per unit footage based on helium logging data and total drilling fluid circulation; and to determine the formation helium content obtained by breaking up the rock volume per unit footage based on formation physical parameters, drilling data, and surface helium content.

[0070] The saturation determination module is used to determine the helium saturation of the formation during drilling based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the collected logging data, and the pre-established calculation formula for formation helium saturation.

[0071] Fourthly, embodiments of the present invention provide a drilling-while-drilling helium layer evaluation device, comprising:

[0072] The data acquisition module is used to acquire logging data, formation physical parameters, and well logging data during the drilling process of the target well;

[0073] The helium saturation determination module is used to determine the helium saturation of the formation during drilling based on logging data, formation physical parameters, and well logging data. The determination of helium saturation is based on the above-mentioned method for determining the helium saturation of the reservoir during drilling.

[0074] The helium layer interpretation module is used to interpret the helium layer of the reservoir during drilling based on helium saturation, helium concentration in the reservoir included in the logging data, and pre-established helium layer evaluation criteria.

[0075] This invention also provides a computer storage medium storing computer-executable instructions. When executed by a processor, the computer-executable instructions implement the above-described method for calculating helium saturation in a drilling reservoir and / or the above-described method for evaluating helium layers while drilling.

[0076] This invention also provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the above-described method for calculating helium saturation in a drilling reservoir and / or the above-described method for evaluating helium layers while drilling.

[0077] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0078] The method for determining reservoir helium saturation during drilling provided in this invention involves determining the volume of rock broken per unit footage during drilling based on the logging data. It also involves determining the total amount of drilling fluid circulated within the time required to break that volume of rock per unit footage during drilling, based on the logging data. Combining the helium logging data and the total amount of drilling fluid circulated, the method determines the surface helium content obtained from breaking the rock volume per unit footage. Furthermore, it determines the formation helium content obtained from breaking the rock volume per unit footage based on formation properties, the logging data, and the surface helium content. Finally, it determines the reservoir helium saturation during drilling based on the rock volume broken per unit footage, the formation helium content obtained from breaking the rock volume per unit footage, the collected logging data, and a pre-established formula for calculating reservoir helium saturation. In the above method, various parameters involved in the calculation of helium saturation in the reservoir during drilling can be analyzed during the drilling process. Compared with the laboratory saturation analysis method, this method can integrate various formation characterization parameters during the drilling process to analyze the helium saturation during drilling, providing a data foundation and technical support for achieving rapid and accurate evaluation of helium reservoirs during drilling.

[0079] The helium reservoir evaluation method provided in this invention involves collecting logging data, formation physical parameters, and well logging data during the drilling process of a target well. Based on these data, the reservoir helium saturation is determined during drilling. Finally, the reservoir helium saturation is interpreted based on the reservoir helium saturation, the helium concentration in the logging data, and a pre-established helium reservoir evaluation standard. This method utilizes the helium concentration measured during drilling, combined with on-site logging parameters, to quickly calculate the reservoir helium saturation. Furthermore, based on the established helium reservoir evaluation standard, it enables rapid evaluation of the helium reservoir during drilling, providing technical support for helium discovery and resource assessment during drilling.

[0080] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0081] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0082] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0083] Figure 1This is a flowchart of the method for determining the helium saturation of a drilling reservoir in Embodiment 1 of the present invention;

[0084] Figure 2 This is a schematic diagram of the device for determining the helium saturation of a drilling reservoir in Embodiment 1 of the present invention;

[0085] Figure 3 This is a flowchart of the method for determining the helium saturation of a drilling reservoir in Embodiment 2 of the present invention;

[0086] Figure 4 This is a regression diagram of wellhead helium concentration data and drilling helium concentration data in Embodiment 2 of the present invention;

[0087] Figure 5 This is an example diagram of helium logging interpretation in the target exploration area in Embodiment 2 of the present invention;

[0088] Figure 6 This is a schematic diagram of the structure of the drilling helium layer evaluation device in Embodiment 2 of the present invention. Detailed Implementation

[0089] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0090] Existing methods for evaluating helium reservoirs in formations are mostly based on laboratory analysis. These methods require collecting helium evaluation data after gas production in a single well to assess the helium saturation of the reservoir and analyze the helium production capacity. For wells that have not undergone trial production, helium saturation cannot be evaluated, thus hindering the analysis of formation helium production capacity. Currently, helium resource evaluation is shifting from laboratory analysis to drilling analysis. However, there is currently no method for rapid evaluation and analysis of reservoir helium during drilling. Existing laboratory analysis methods cannot meet the needs of helium production capacity evaluation. Therefore, a calculation method is needed to study helium saturation based on formation characterization parameters collected during drilling.

[0091] To address the problem that existing technologies cannot evaluate helium layers during drilling, this invention provides a method for determining helium saturation in a drilling reservoir and a method for evaluating helium layers during drilling, thus overcoming the shortcomings of existing technologies.

[0092] Example 1

[0093] Embodiment 1 of the present invention provides a method for determining the helium saturation of a drilling reservoir, the process of which is as follows: Figure 1 As shown, it includes the following steps:

[0094] Step S101: Based on the drilling data in the collected logging data, determine the volume of rock broken per unit footage during the drilling process. The logging data also includes helium logging data and formation physical parameters.

[0095] Step S102: Determine the total amount of drilling fluid to be circulated based on the drilling data to break the rock volume per unit advance during the drilling process.

[0096] Step S103: Based on the helium logging data and the total drilling fluid circulation, determine the surface helium content obtained from the rock volume per unit drilling depth.

[0097] Step S104: Determine the formation helium content obtained from the rock volume per unit drilling advance based on formation physical parameters, drilling data, and surface helium content.

[0098] Step S105: Determine the reservoir helium saturation during drilling based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the collected logging data, and the pre-established calculation formula for formation helium saturation.

[0099] Steps S101-S105 implement the process of determining the formation helium content based on the logging data and formation physical parameters collected during drilling, and then calculating the helium saturation in the formation by combining the collected logging data and the pre-established formula for calculating formation helium saturation. Traditional saturation calculation and analysis methods are still in the experimental stage, requiring data to be collected and analyzed after drilling is completed. Since the current helium production capacity evaluation and analysis methods have shifted to analysis during drilling, laboratory analysis methods cannot meet the current needs of helium evaluation and analysis. This method utilizes logging measurement data, formation physical parameters, and field logging parameters to quickly calculate the helium saturation of the reservoir during drilling, providing technical support for helium discovery and resource evaluation during drilling.

[0100] The logging data in step S101 includes: helium concentration, degassing efficiency and drilling data, wherein the drilling data includes: drilling fluid pump displacement, surface drilling fluid temperature, drilling speed and wellbore radius. In step S105, the logging data includes rock porosity.

[0101] Optionally, based on the logging data obtained during drilling, the rock volume per unit footage of fracturing can be determined, including: determining the rock volume per unit footage of fracturing during drilling based on the collected wellbore radius and the unit footage during drilling. The rock volume per unit footage of fracturing can be understood as the volume of rock obtained per unit footage of fracturing within the wellbore. Since the wellbore has a diameter, the rock volume per unit footage of fracturing can be obtained based on the relationship between the wellbore's cross-sectional area and the unit footage. In specific applications, this can be determined using the selected formula.

[0102] For example, the volume of rock per unit cutting advance is expressed by the following expression:

[0103] v = πr 2 ×h (1)

[0104] Where V is the volume of rock per unit advance in breaking, and the unit can be, for example, m. 3 r is the wellbore radius in meters (m), and h is the unit depth in meters (m).

[0105] Optionally, in step S102, the total amount of drilling fluid circulated within the time required to break a unit footage of rock during the drilling process, based on the drilling data, includes:

[0106] Based on the collected drilling fluid discharge, drilling speed and per unit footage, determine the total amount of drilling fluid consumed in circulation within the time required to break the rock volume per unit footage during the drilling process.

[0107] In practical applications, the specific formula can be used to determine the total drilling fluid circulation volume. For example, the total drilling fluid circulation volume can be expressed by the following formula:

[0108]

[0109] Among them, Q 总 This refers to the total volume of drilling fluid circulated per unit depth of rock breaking, expressed in meters (m). 3 Q represents the drilling fluid pump displacement at the drilling depth, which can be expressed in meters (m). 3 / min, where s is the drilling rate at depth, and the unit can be m / min.

[0110] Optionally, in step S103, the surface helium content obtained by determining the rock volume per unit drilling depth based on helium logging data and total drilling fluid circulation includes:

[0111] The helium concentration on the ground is obtained by determining the volume of rock per unit advance of crushing based on the collected helium concentration and degassing efficiency.

[0112] Based on the relationship between the total drilling fluid circulation volume, the collected helium concentration, and the surface helium concentration obtained from the rock volume per unit footage of breaking, the surface helium content obtained from the rock volume per unit footage of breaking is determined.

[0113] Optionally, the ground helium concentration obtained from the volume of rock crushed per unit advance can be determined according to a chosen formula, for example, expressed by the following expression:

[0114] C = He × η (3)

[0115] Where C is the ground helium concentration obtained from the rock volume per unit advance of crushing, and the unit can be %, and He is the collected helium content, and the unit can be m³. 3 η is the degassing efficiency, which can be expressed as a percentage (%).

[0116] The relationship between the total drilling fluid circulation volume, the collected helium concentration, and the surface helium content obtained from the rock volume per unit drilling depth can be expressed as:

[0117]

[0118] The ground helium content obtained from a unit advance of rock crushing can be determined using the following expression:

[0119]

[0120] Among them, V 表 The ground helium content is obtained from the volume of rock broken per unit advance, and the unit can be m. 3 .

[0121] From the variable transformation relationship between formulas (2), (3), and (4), the surface helium content obtained by determining the rock volume per unit drilling depth can be obtained, i.e., formula (5). Helium concentration refers to the volume concentration of helium in natural gas, and helium content refers to the total amount of helium in natural gas. Based on the helium concentration and degassing efficiency collected during drilling, the surface helium concentration obtained by the rock volume per unit drilling depth can be determined. Combining the relationship expression between the total drilling fluid circulation volume, the collected helium concentration, and the surface helium concentration obtained by the rock volume per unit drilling depth, the surface helium content obtained by the rock volume per unit drilling depth can be further determined. Based on the expressions calculated by each parameter, and after collecting the logging data, well logging data, and formation physical parameters that need to be included in the calculation during drilling, the values ​​of the parameters required for helium evaluation can be quickly determined without waiting for laboratory analysis after drilling is completed, thus improving the efficiency of drilling reservoir helium layer evaluation and analysis. The formulas for determining the various parameters in the embodiments of the present invention need to be set according to the drilling environment, drilling tools and geological conditions on site. In specific applications, the formulas provided in the embodiments of the present invention can be used for calculation, or adjustments can be made according to the site environment.

[0122] Optionally, in step S104, the formation helium content obtained by calculating the rock volume per unit depth of fracturing based on formation physical properties, drilling data, and surface helium content includes:

[0123] The formation helium content is determined by the volume of rock broken per unit depth based on formation temperature, surface drilling fluid temperature, formation pressure, atmospheric pressure, and surface helium content.

[0124] In practical applications, the helium content can be determined based on the chosen formula. For example, the formation helium content can be expressed by the following expression:

[0125]

[0126] Among them, V 层 The formation helium content is obtained from the volume of rock broken per unit advance, and the unit can be m. 3 P represents atmospheric pressure, and the unit can be kPa. V 表 T represents the surface helium content obtained from the volume of rock crushed per unit advance. 层 Formation temperature, in °C, P 层 The formation pressure is represented by kPa, and T is the surface drilling fluid temperature in °C. By converting the surface and formation temperature and pressure conditions, and combining this with the surface gas content obtained from the volume of rock broken per unit drilling depth, the formation helium content under the underground temperature and pressure conditions can be determined.

[0127] Optionally, in step S105, based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the acquired logging data, and the pre-established calculation formula for reservoir helium saturation, the reservoir helium saturation during drilling is determined, including:

[0128] In practical applications, the specific formula can be used to determine the helium saturation level. For example, the pre-established formula for calculating reservoir helium saturation can be expressed by the following expression:

[0129]

[0130] Among them, S H The helium saturation level in the reservoir can be expressed as a percentage. Rock porosity, expressed in % (percentage).

[0131] The rock volume per unit depth of the fractured rock, the formation helium content obtained from the rock volume per unit depth of the fractured rock, and the collected logging data are applied to the pre-established formula for calculating reservoir helium saturation to determine the formation helium saturation during drilling.

[0132] In formula (7) This is the relationship between the rock volume per unit footage of fracturing, the formation helium content obtained from the rock volume per unit footage of fracturing, the collected logging data, and the reservoir helium saturation. From formula (6), we can know the expression for layer V. V is represented by formula (5). Then, we use formula (1) to represent V in formula (7). Finally, we can obtain a more specific expression for the relationship of reservoir helium saturation, that is... The various parameters involved in the calculation in the formula can be obtained in real time during the drilling process, and the reservoir helium saturation can be quickly determined.

[0133] This invention utilizes helium concentration data collected from well logging data, combined with parameters such as wellbore radius, drilling rate, drilling fluid discharge rate, and degassing efficiency, to determine the helium content released per unit depth of rock fractured under surface conditions, i.e., the surface helium content obtained from the rock fractured per unit depth. Then, based on the conversion relationship of underground temperature and pressure conditions, and combined with the surface helium content obtained from the rock fractured per unit depth, the natural gas content released per unit depth of rock fractured is determined, i.e., the formation helium content obtained from the rock fractured per unit depth. Finally, combined with rock porosity, the reservoir helium saturation is calculated. This allows for rapid calculation of reservoir helium saturation, providing technical support for helium discovery during drilling and resource assessment.

[0134] Based on the same inventive concept, embodiments of the present invention also provide a device for determining the helium saturation of a drilling reservoir. This device can be installed in a device with computational processing capabilities, and its structure is as follows. Figure 2 As shown, it includes:

[0135] The volume determination module 11 is used to determine the volume of rock broken per unit footage during drilling based on the drilling data in the collected logging data. The logging data also includes helium logging data and formation physical parameters.

[0136] The drilling fluid determination module 12 is used to determine the total amount of drilling fluid consumed during the time required to break a unit of rock volume during the drilling process, based on the drilling data.

[0137] The helium content determination module 13 is used to determine the surface helium content obtained by breaking the rock volume per unit footage based on helium logging data and total drilling fluid circulation; and to determine the formation helium content obtained by breaking the rock volume per unit footage based on formation physical parameters, drilling data and surface helium content.

[0138] The saturation determination module 14 is used to determine the reservoir helium saturation during drilling based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the collected logging data, and the pre-established calculation formula for formation helium saturation.

[0139] Regarding the drilling reservoir helium saturation determination device in the above embodiments, the specific methods by which each module performs its operation have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0140] Example 2

[0141] Embodiment 2 of the present invention provides a method for evaluating helium reservoirs while drilling, which is based on the method for determining helium saturation in reservoirs while drilling in Embodiment 1. The flowchart is shown below. Figure 3 As shown, it includes:

[0142] Step S201: Collect logging data, formation physical parameters and well logging data during the drilling process of the target well.

[0143] Step S202: Determine the helium saturation of the reservoir during the drilling process based on logging data, formation physical parameters and well logging data. The determination of helium saturation is based on the method for determining the helium saturation of the reservoir during drilling provided in Example 1.

[0144] Step S203: Based on the reservoir helium saturation, the reservoir helium concentration included in the logging data, and the pre-established helium layer evaluation criteria, interpret the helium layer of the reservoir during the drilling process.

[0145] Steps S201-S203 achieve the following: During the drilling process, by using the real-time collected logging data, well logging data, and formation physical parameters, and based on the helium saturation calculation formula provided in Embodiment 1 of the present invention, the reservoir helium saturation during the drilling process can be quickly determined. Then, based on the reservoir helium saturation, the helium concentration of the reservoir included in the logging data, and the pre-established helium layer evaluation standard, the reservoir during the drilling process is interpreted as a helium layer. This enables the research on helium saturation calculation methods based on the formation characterization parameters collected during the drilling process, and achieves the goal of rapid and accurate evaluation of the helium layer during the drilling process based on the established helium layer evaluation standard.

[0146] Optionally, the process of establishing helium layer evaluation criteria includes:

[0147] Using the preset helium layer evaluation index concentration and the pre-established drilling helium concentration correction model, the corresponding drilling helium concentration is obtained; based on the calculation relationship between the drilling helium concentration and the pre-established formation helium saturation, the reservoir helium saturation at this drilling helium concentration is obtained; based on the drilling helium concentration corresponding to the helium layer evaluation index concentration and the reservoir helium saturation at this drilling helium concentration, a helium layer evaluation standard is established.

[0148] Optionally, a drilling helium concentration correction model is established, including:

[0149] Wellhead gas samples were collected from multiple producing gas wells in the target exploration area, and the wellhead helium concentration in the wellhead gas samples was analyzed; the helium concentration during drilling was also collected from the production section of the producing gas wells; linear regression analysis was performed on the wellhead helium concentration and the helium concentration during drilling in the production section to establish the regression relationship between the wellhead helium concentration and the helium concentration during drilling.

[0150] The regression equation is used as the correction model for helium concentration while drilling; the regression equation is expressed by the following expression: Wellhead helium concentration = Helium concentration while drilling * Linear regression coefficient.

[0151] Optionally, the corresponding helium concentration while drilling can be obtained by using the preset helium layer evaluation index concentration and the pre-established helium concentration correction model while drilling, including:

[0152] The pre-set helium layer evaluation index concentration is used as the wellhead helium concentration in the drilling helium concentration correction model.

[0153] The corresponding helium concentration while drilling is calculated using the helium concentration correction model while drilling.

[0154] Optionally, based on the helium content during drilling corresponding to the helium content of the helium layer evaluation index and the formation helium saturation at that helium content, a helium layer evaluation standard is established, including:

[0155] Based on the helium content corresponding to the helium content in the helium layer evaluation index, a lower limit for interpreting the helium content standard is established; based on the formation helium saturation under this helium content, a lower limit for interpreting the reservoir helium saturation standard is established.

[0156] In this embodiment, gas samples of production gas from nine drilled wells in the target exploration area were collected, and laboratory analysis of helium content was conducted to obtain wellhead helium concentration data in the gas samples. At the same time, the corresponding drilling helium concentration data of the production well sections were statistically analyzed to provide basic data for the establishment of the drilling helium concentration correction model. The wellhead helium concentration data and the corresponding drilling helium concentration data of the production well sections are shown in Table 1.

[0157] Table 1

[0158]

[0159] Linear regression analysis was conducted using wellhead helium concentration data and helium concentration data while drilling. Based on the data distribution characteristics, a regression relationship was established between the two data points, revealing a 5.04-fold linear relationship. Based on this regression relationship, a correction model for helium concentration while drilling was established: Wellhead helium concentration = Helium concentration while drilling * 5.04. The regression relationship between wellhead helium concentration data and helium concentration data while drilling can be found in [link to relevant documentation]. Figure 4 As shown in the figure, the wellhead content and the helium concentration detected while drilling represent the wellhead helium concentration data and the helium concentration detected while drilling, respectively. Linear regression analysis can be performed on the data in Table 1. The preset helium layer evaluation index concentration can be set according to the existing evaluation standards for helium-rich layers. For example, based on existing research results and industry consensus, a wellhead helium concentration greater than 1000 ppm is generally considered a helium-rich layer. In this case, the preset helium layer evaluation index concentration can be set to 1000 ppm, or it can be set according to the actual evaluation needs; there are no restrictions here. Using the preset helium layer evaluation index concentration as the wellhead helium concentration in the helium content correction model while drilling, the corresponding helium concentration while drilling is 200 ppm. Applying the helium concentration while drilling corresponding to the index concentration to the reservoir helium saturation calculation formula, the reservoir helium saturation at this helium concentration is 0.06%. Based on the helium concentration while drilling corresponding to the index concentration, a helium layer evaluation standard is established for the reservoir helium saturation at this concentration. The helium layer evaluation standard is shown in Table 2.

[0160] Table 2

[0161] helium-rich layer Helium-depleted layer helium concentration ≥200ppm <200ppm reservoir helium saturation ≥0.06％ <0.06％

[0162] Optionally, based on helium saturation, helium content in logging data, and pre-established helium layer evaluation criteria, helium layer interpretation is performed on the reservoir during drilling, including:

[0163] If the peak value of helium content in the reservoir and the corresponding reservoir helium saturation are both not less than the helium layer evaluation standard, the formation is interpreted as a helium-rich layer.

[0164] If the peak value of helium content in the reservoir and the corresponding reservoir helium saturation are both less than the helium layer evaluation standard, the formation is interpreted as a helium-poor layer.

[0165] Figure 5 The image shows the interpretation of helium logging data for the target exploration area. In the Shanxi Formation, at a depth of 2033-2037m, the lithology is fine sandstone. The peak helium concentration during drilling reached 303ppm, with an average of 271ppm. Using the formula for calculating helium saturation, the peak helium saturation of the reservoir was found to be 0.12%, with an average of 0.09%. Both the reservoir helium concentration and the reservoir helium saturation exceeded the lower limit of the helium layer interpretation standard, and this section was interpreted as a helium-rich layer.

[0166] The Taiyuan Formation well to be analyzed and evaluated, at a depth of 2089-2092m, has a lithology of fine sandstone. The peak helium concentration during drilling reached 138ppm, with an average of 130ppm. Using the helium saturation calculation formula, the peak helium saturation of the reservoir was found to be 0.06%, with an average of 0.05%. The formation helium concentration did not reach the lower limit of the helium layer interpretation standard, and the formation helium saturation just reached the lower limit of the helium layer interpretation standard. Therefore, this section is interpreted as a helium-poor layer.

[0167] This invention utilizes the helium concentration measured during drilling, combined with on-site logging parameters, to quickly calculate the helium saturation of the reservoir. Then, based on the established helium evaluation standard for the drilling reservoir, it can quickly evaluate the helium layer in the reservoir during drilling, providing technical support for helium discovery and resource evaluation during drilling.

[0168] Based on the same inventive concept, embodiments of the present invention also provide a drilling helium layer evaluation device, which can be installed in a device with computational processing capabilities, and the structure of the device is as follows. Figure 6 As shown, it includes:

[0169] Data acquisition module 21 is used to acquire logging data, formation physical parameters and well logging data during the drilling process of the target well;

[0170] The helium saturation determination module 22 is used to determine the helium saturation of the formation during the drilling process based on logging data, formation physical parameters and logging data. The determination of helium saturation is based on the method for determining the helium saturation of the reservoir during drilling in Example 1.

[0171] The helium layer interpretation module 23 is used to interpret the helium layer of the reservoir during the drilling process based on the helium saturation, the helium content of the reservoir included in the logging data, and the pre-established helium layer evaluation criteria.

[0172] Regarding the drilling reservoir helium layer evaluation device in the above embodiments, the specific operation methods of each module have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0173] The present invention also provides a computer storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method for calculating helium saturation in a drilling reservoir and / or the above-described method for evaluating helium layers while drilling.

[0174] Regarding the drilling helium layer evaluation device in the above embodiments, the specific methods by which each module performs its operation have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0175] The present invention also provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the above-described method for calculating helium saturation in a drilling reservoir and / or the above-described method for evaluating helium layers while drilling.

[0176] Unless otherwise specifically stated, terms such as processing, calculation, operation, determination, display, etc., may refer to the actions and / or processes of one or more processing or computing systems or similar devices that represent the manipulation and conversion of data representing physical (e.g., electronic) quantities within the registers or memory of the processing system into other data similarly representing physical quantities within the memory, registers, or other such information storage, transmission, or display devices of the processing system. Information and signals can be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0177] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0178] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0179] Those skilled in the art will also understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments herein can be implemented as electronic hardware, computer software, or a combination thereof. To clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in alternative ways for each specific application; however, such implementation decisions should not be construed as departing from the scope of this disclosure.

[0180] The steps of the methods or algorithms described in conjunction with the embodiments herein can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software modules can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and storage medium can exist as discrete components in the user terminal.

[0181] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. This software code can be stored in memory units and executed by a processor. The memory units can be implemented within the processor or outside the processor; in the latter case, they are communicatively coupled to the processor via various means, as is well known in the art.

[0182] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A method for determining helium saturation in a drilling reservoir, characterized in that, include: Based on the logging data collected during drilling, the volume of rock broken per unit footage during drilling is determined. The logging data also includes helium logging data and formation physical parameters. Based on the drilling data, determine the total amount of drilling fluid consumed within the time required to break a unit of rock volume during the drilling process. Based on the helium logging data and the total drilling fluid circulation volume, the surface helium content is determined by the volume of rock broken per unit depth. Based on formation physical properties, drilling data, and surface helium content, the formation helium content is determined by the volume of rock broken per unit depth of the drilling operation. Based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the collected logging data, and the pre-established calculation formula for reservoir helium saturation, the reservoir helium saturation during drilling is determined.

2. The method as described in claim 1, characterized in that, Based on the logging data collected during drilling, the volume of rock broken per unit footage during drilling is determined, including: Based on the collected wellbore radius and the unit footage during drilling, the volume of rock broken per unit footage during drilling is determined. The volume of rock per unit cutting advance is expressed by the following expression: v=πr 2 ×h, Where V is the volume of rock broken per unit depth, r is the borehole radius, and h is the depth per unit depth.

3. The method as described in claim 1, characterized in that, Based on the drilling data, the total amount of drilling fluid consumed within the time required to break up a unit footage of rock during the drilling process includes: Based on the collected drilling fluid discharge, drilling speed and per unit footage, determine the total amount of drilling fluid consumed in circulation within the time required to break the rock volume per unit footage during the drilling process. The total circulating drilling fluid volume is expressed by the following expression: Among them, Q 总 denoted as the total drilling fluid circulation volume, Q as the drilling fluid pump displacement at the drilling depth, and s as the drilling rate at the drilling depth.

4. The method as described in claim 1, characterized in that, Based on helium logging data and the total drilling fluid circulation volume, the surface helium content is determined by the volume of rock broken per unit depth, including: The ground helium concentration is determined by the collected helium concentration and degassing efficiency, based on the volume of rock per unit cutting advance. Based on the relationship between the total drilling fluid circulation volume, the collected helium concentration, and the surface helium concentration obtained from the rock volume per unit depth of rock breaking, the surface helium content obtained from the rock volume per unit depth of rock breaking is determined.

5. The method as described in claim 4, characterized in that, The ground helium concentration obtained from the rock volume per unit cutting advance is expressed by the following expression: C = He × η Where C is the ground helium concentration obtained from the rock volume per unit advance of crushing, He is the collected helium concentration, and η is the degassing efficiency. The relationship between the total drilling fluid circulation volume, the collected helium concentration, and the surface helium content obtained from the rock volume per unit drilling depth is expressed as follows: The ground helium content obtained from the rock volume per unit cutting advance is determined by the following expression: Among them, V 表 The ground helium content is obtained from the volume of rock broken per unit advance.

6. The method as described in claim 1, characterized in that, The formation helium content, calculated based on formation physical parameters, drilling data, and surface helium content, for the volume of rock per unit depth of fracturing, includes: The formation helium content is determined by the volume of rock broken per unit depth based on formation temperature, surface drilling fluid temperature, formation pressure, atmospheric pressure, and surface helium content. The helium content of the formation is expressed by the following expression: Among them, V 层 The formation helium content is the volume of rock broken per unit advance, where P is atmospheric pressure and V is the density of the rock. 表 T represents the surface helium content obtained from the volume of rock crushed per unit advance. 层 For formation temperature, P 层 Where is the formation pressure, and T is the surface drilling fluid temperature.

7. The method as described in claim 1, characterized in that, Based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the acquired logging data, and the pre-established formula for calculating reservoir helium saturation, the reservoir helium saturation during drilling is determined, including: The pre-established formula for calculating reservoir helium saturation is expressed by the following expression: Among them, S H The helium saturation level of the reservoir. Rock porosity; The rock volume per unit depth of the fractured rock, the formation helium content obtained from the rock volume per unit depth of the fractured rock, and the collected logging data are applied to the pre-established formula for calculating formation helium saturation to determine the formation helium saturation during drilling.

8. A method for evaluating helium layers while drilling, characterized in that, The method for determining helium saturation in a drilling reservoir as described in claim 1 includes: Collect logging data, formation physical parameters, and well logging data during the drilling process of the target well; The reservoir helium saturation during drilling is determined based on the logging data, formation physical parameters, and well logging data described in claim 1. Based on the reservoir helium saturation, the reservoir helium concentration included in the logging data, and the pre-established helium layer evaluation criteria, the reservoir is interpreted as a helium layer during the drilling process.

9. The method as described in claim 8, characterized in that, The process for establishing helium layer evaluation standards includes: Using the preset helium layer evaluation index concentration and the pre-established drilling helium concentration correction model, the corresponding drilling helium concentration is obtained. Based on the calculation formula of the helium concentration during drilling and the pre-established formation helium saturation, the formation helium saturation at the helium concentration during drilling is obtained. Based on the helium concentration during drilling corresponding to the helium index concentration and the formation helium saturation at that helium concentration, a helium layer evaluation standard is established.

10. The method as described in claim 9, characterized in that, Establish a drilling helium concentration correction model, including: Collect wellhead gas samples from multiple producing gas wells in the target exploration area and analyze the wellhead helium concentration in the wellhead gas samples; and collect the helium concentration during drilling in the production section of the producing gas wells. Linear regression analysis was performed on the wellhead helium concentration and the helium concentration during drilling in the production well section to establish the regression relationship between the wellhead helium concentration and the helium concentration during drilling. The regression relationship was used as a drilling helium concentration correction model. The regression relationship is expressed by the following formula: Wellhead helium concentration = Helium concentration during drilling * Linear regression coefficient.

11. The method as described in claim 9, characterized in that, The process of obtaining the corresponding helium concentration while drilling using a preset helium layer evaluation index concentration and a pre-established helium concentration correction model while drilling includes: The pre-set helium layer evaluation index concentration is used as the wellhead helium concentration in the drilling helium concentration correction model. The corresponding helium concentration while drilling is calculated using the helium concentration correction model while drilling.

12. The method as described in claim 9, characterized in that, Based on the helium concentration during drilling corresponding to the helium index concentration and the formation helium saturation at that concentration, a helium layer evaluation standard is established, including: Based on the helium concentration during drilling corresponding to the helium layer evaluation index concentration, a lower limit for the interpretation standard of helium concentration is established. Based on the formation helium saturation at this drilling helium concentration, a lower limit for interpreting reservoir helium saturation is established.

13. The method as described in claim 12, characterized in that, Based on the helium saturation, the reservoir helium concentration included in the logging data, and the pre-established helium layer evaluation criteria, the reservoir is interpreted during drilling, including: If the peak value of the reservoir helium concentration and the corresponding reservoir helium saturation are both not less than the helium layer evaluation standard, the formation is interpreted as a helium-rich layer. If the peak value of the reservoir helium concentration and the corresponding reservoir helium saturation are both less than the helium layer evaluation standard, the formation is interpreted as a helium-poor layer.

14. A device for determining helium saturation in a drilling reservoir, characterized in that, include: The volume determination module is used to determine the volume of rock broken per unit footage during drilling based on the drilling data in the collected logging data. The logging data also includes helium logging data and formation physical property parameters. The drilling fluid determination module is used to determine the total amount of drilling fluid circulation required to break the rock volume per unit advance during the drilling process based on the drilling data. The helium content determination module is used to determine the surface helium content obtained by breaking the rock volume per unit footage based on helium logging data and the total drilling fluid circulation; and to determine the formation helium content obtained by breaking the rock volume per unit footage based on formation physical parameters, drilling data and surface helium content. The saturation determination module is used to determine the helium saturation of the formation during drilling based on the rock volume per unit drilling depth, the formation helium content obtained from the rock volume per unit drilling depth, the collected logging data, and the pre-established calculation formula for formation helium saturation.

15. A drilling-while-drilling helium layer evaluation device, characterized in that, include: The data acquisition module is used to acquire logging data, formation physical parameters, and well logging data during the drilling process of the target well; The helium saturation determination module is used to determine the helium saturation of the formation during the drilling process based on the logging data, formation physical parameters and logging data. The determination of the helium saturation is based on the method for determining the helium saturation of the reservoir during drilling as described in claim 1. The helium layer interpretation module is used to interpret the helium layer of the reservoir during drilling based on the helium saturation, the helium concentration of the reservoir included in the logging data, and the pre-established helium layer evaluation criteria.

16. A computer storage medium, characterized in that, The computer storage medium stores computer-executable instructions, which, when executed by a processor, implement the method for calculating helium saturation in a drilling reservoir as described in any one of claims 1-7 and / or the method for evaluating a helium layer while drilling as described in claims 8-13.

17. A computer device, characterized in that, include: The memory, the processor, and the computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method for calculating helium saturation in a drilling reservoir as described in any one of claims 1-7 and / or the method for evaluating a helium layer while drilling as described in claims 8-13.

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