CN111879824A - Hydrate saturation measurement device, system and method - Google Patents

Abstract

The invention belongs to the technical field of hydrate saturation calculation, and in particular relates to a hydrate saturation measurement device, system and method. The hydrate saturation measurement device includes: a reaction kettle, a stirrer, an infrared optical fiber probe for measuring the gas concentration dissolved in the hydrate, and a resistivity probe assembly for measuring the resistivity of the hydrate; the reaction kettle includes a reaction kettle The body, the reactor body includes an outer shell and an insulating inner liner, and an annular space for storing hydrate is formed between the outer shell and the insulating inner liner; the resistivity probe assembly and the infrared fiber probe are installed on the shell, and the resistivity probe assembly and the infrared fiber The probes all pass through the annular space and extend into the insulating inner tank; the stirrer is connected to the reactor body, and the output end of the stirrer passes through the shell and extends into the annular space. The result of measuring the actual saturation of hydrate by the hydrate saturation measuring device is more accurate, and the hydrate saturation measuring device is simple to operate and has high safety.

Description

Hydrate saturation measurement device, system and method

technical field

The invention belongs to the technical field of hydrate saturation calculation, and in particular relates to a hydrate saturation measurement device, system and method.

Background technique

Natural gas hydrate is considered by many researchers to be a new energy source that can replace fossil fuels such as coal and oil because of its huge reserves and clean and non-polluting properties when burning. Natural gas hydrate, as a new energy source, can alleviate the global energy crisis. my country has huge reserves of natural gas hydrate, which has great potential for exploitation and strategic significance. In order to further provide more reliable data for the exploitation of natural gas hydrate, it is necessary to calculate the saturation of natural gas hydrate. During the formation and decomposition of natural gas hydrate, the amount and concentration of the aqueous solution will change, which will cause the electrical conductivity of natural gas hydrate to change. Therefore, in the prior art, the hydrate saturation measurement device includes a resistivity measurement device. The device can use multiple sets of electrodes to measure the conductivity of natural gas hydrates, thereby calculating the saturation of hydrates. However, the gas hydrate formation and decomposition process will be accompanied by the precipitation and dissolution of gas; but the hydrate saturation measured by the existing hydrate saturation measurement device is not in the process of calculating the hydrate saturation. Considering the precipitation and dissolution of gas, it will lead to inaccurate measurement of gas hydrate saturation.

SUMMARY OF THE INVENTION

The invention solves the inaccuracy of measurement results of hydrate saturation in the prior art, and provides a hydrate saturation measurement device, system and method.

In view of the above problems, an embodiment of the present invention provides a hydrate saturation measurement device, including a reaction kettle, a stirrer, an infrared optical fiber probe for measuring the concentration of gas dissolved in a hydrate, and a resistivity for measuring the hydrate The resistivity probe assembly; the reactor includes a reactor body, the reactor body includes an outer shell and an insulating inner liner, and an annular space for storing hydrate is formed between the outer shell and the insulating inner liner; the Both the resistivity probe assembly and the infrared fiber probe are mounted on the casing, and both the resistivity probe assembly and the infrared fiber probe pass through the annular space and extend into the insulating inner tank; the The stirrer is connected to the reactor body, and the output end of the stirrer passes through the outer shell and extends into the annular space.

Optionally, the hydrate saturation measurement device further includes a first adjustment knob and a second adjustment knob; the resistivity probe assembly is mounted on the housing through the first adjustment knob, and the first adjustment knob The knob is used to adjust the first depth that the resistivity probe assembly extends into the annular space; the infrared fiber probe is installed on the housing through the second adjustment knob, and the second adjustment knob is used to adjust The infrared fiber probe extends into the annular space to a second depth.

Optionally, the hydrate saturation measurement device further includes a temperature control jacket installed on the end face of the outer shell away from the insulating inner pot; the temperature control jacket includes a cooling channel for cooling liquid to flow and Both are communicated with the cooling liquid inlet and the cooling liquid outlet of the cooling channel.

Optionally, the height of the cooling liquid outlet is higher than the height of the cooling liquid inlet.

Optionally, the shell is provided with a liquid inlet and outlet and a gas inlet and outlet which are both connected to the annular space; the gas inlet and outlet are arranged on the upper end of the reactor body; the liquid inlet and outlet are arranged on the reactor body. bottom of the kettle.

Optionally, the outer shell of the insulating inner pot is covered with an insulating layer.

The present invention also provides a hydrate saturation measurement system, comprising a controller and the hydrate saturation measurement device; the resistivity probe assembly and the infrared fiber probe are connected to the controller;

The controller is used to:

Obtain the resistivity of the hydrate stored in the annular space measured by the resistivity probe assembly, input the resistivity into a preset first saturation model, and obtain the output of the first saturation model. the first degree of saturation; the first degree of saturation refers to the total degree of saturation of the hydrate;

Obtain the gas concentration dissolved in the hydrate measured by the infrared fiber probe, input the gas concentration into a preset second saturation model, and obtain a second saturation output from the second saturation model degree; the second degree of saturation refers to the degree of saturation of the gas dissolved in the hydrate;

Obtain the saturation difference between the first saturation and the second saturation, and record the saturation difference as the actual saturation of the hydrate.

The present invention also provides a hydrate saturation measurement method of the hydrate saturation measurement device, comprising:

Obtain the resistivity of the hydrate stored in the annular space measured by the resistivity probe assembly, input the resistivity into a preset first saturation model, and obtain the output of the first saturation model. the first degree of saturation; the first degree of saturation refers to the total degree of saturation of the hydrate;

Obtain the gas concentration dissolved in the hydrate measured by the infrared fiber probe, input the gas concentration into a preset second saturation model, and obtain a second saturation output from the second saturation model degree; the second degree of saturation refers to the degree of saturation of the gas dissolved in the hydrate;

Obtain the saturation difference between the first saturation and the second saturation, and record the saturation difference as the actual saturation of the hydrate.

Optionally, the first saturation model is:

Wherein, S ₁ is the first degree of saturation; R ₀ is the formation resistivity with complete water saturation; R _t is the resistivity of the hydrate; and n is an empirical parameter.

Optionally, the second saturation model is:

Among them, S ₂ is the second degree of saturation; N is the number of hydrates; M is the theoretical relative molecular mass of hydrates; ρ is the density of hydrates; V ₀ is the volume of water when it is completely saturated with water; n _g is the gas concentration dissolved in the hydrate.

In the present invention, the resistivity probe assembly is used to measure the resistivity of the hydrate, thereby calculating the total saturation of the hydrate; and the infrared fiber probe is used to measure the hydrate dissolved in the hydrate. The gas concentration of the gas (or the gas concentration of the gas precipitated from the hydrate is measured), thereby calculating the hydrate saturation corresponding to the gas dissolved in the hydrate. Because in the process of the hydrate reaction in the reactor body, there are not only changes in the hydrate content and the ion concentration of the hydrate, but also with the gas in the reactor body dissolved in the hydrate. The amount of hydrate, or the amount of gas precipitated from the hydrate; through the hydrate saturation measurement method in the present invention, the actual saturation of the hydrate in the reactor body can be obtained. And the result of measuring the actual saturation of the hydrate by the hydrate saturation measuring device is more accurate, and the operation is simple and the safety is high.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic three-dimensional structure diagram of a hydrate saturation measurement device provided in an embodiment of the present invention.

The reference numbers in the description are as follows:

1. Reaction kettle; 11. Reaction kettle body; 111, outer shell; 1111, liquid inlet and outlet; 1112, gas inlet and outlet; 112, insulating liner; 1121, insulating layer; 113, annular space; 2, infrared fiber probe; 3 , stirrer; 4, resistivity probe assembly; 41, resistivity probe; 5, first adjustment knob; 6, second adjustment knob; 7, temperature control jacket; 71, coolant inlet; 72, coolant outlet.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

It should be understood that the orientations or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc. are based on the orientations or positions shown in the drawings The relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

As shown in FIG. 1, an embodiment of the present invention provides a hydrate saturation measurement device, including a reactor 1, a stirrer 3, an infrared fiber probe 2 for measuring the concentration of gas dissolved in hydrate, and a The resistivity probe assembly 4 for measuring the resistivity of hydrate; the reactor 1 includes a reactor body 11, the reactor body 11 includes an outer shell 111 and an insulating inner liner 112, and the outer shell 111 and the insulating inner liner 112 An annular space 113 for storing hydrate is formed therebetween; the resistivity probe assembly 4 and the infrared fiber probe 2 are both installed on the housing 111, and the resistivity probe assembly 4 and the infrared fiber probe 2 pass through the annular space 113 and extend into the insulating liner 112; the agitator 3 is connected to the reactor body 11, and the output end of the agitator 3 extends through the outer shell 111 into the annular space 113 . Preferably, the stirrer 3 includes a lift-type magnetic stirrer; understandably, the stirrer 3 is used to stir the hydrate in the reactor body 11 evenly, and the stirrer 3 can be adjusted to output The ends are located at different depths of the annular space 113, so that the output end of the agitator 3 can stir hydrates of different depths, so different mixing effects of hydrates can be produced.

The present invention also provides a controller, which is used for:

Obtain the resistivity of the hydrate stored in the annular space measured by the resistivity probe assembly, input the resistivity into a preset first saturation model, and obtain the output of the first saturation model. the first degree of saturation; the first degree of saturation refers to the total degree of saturation of the hydrate;

Obtain the gas concentration dissolved in the hydrate measured by the infrared fiber probe, input the gas concentration into a preset second saturation model, and obtain a second saturation output from the second saturation model degree; the second degree of saturation refers to the degree of saturation of the gas dissolved in the hydrate;

Obtain the saturation difference between the first saturation and the second saturation, and record the saturation difference as the actual saturation of the hydrate.

It will be appreciated that the controller calculates the actual saturation of the hydrate as measured by the hydrate saturation measuring device taking into account the amount of gas dissolved in the hydrate (or the amount of gas evolved from the hydrate). amount), so that the value of the hydrate saturation measured by the hydrate saturation measurement system is more accurate.

Preferably, the infrared fiber probe 2 assembly is a Fourier infrared fiber probe assembly; it is understood that the infrared fiber probe 2 assembly can measure carbon dioxide and alkane gases dissolved in the hydrate in the reactor body 11 The content (that is, the concentration of the gas dissolved in the hydrate) can be obtained, and then the amount of hydrate generated by the gas or the amount of gas dissolved in the hydrate can be obtained.

Further, the resistivity probe assembly 4 is connected to an external resistivity analyzer, and the infrared fiber probe 2 is connected to an external gas analyzer (for example, a Fourier transform infrared spectrometer, etc.).

In one embodiment, the reaction kettle body 11 is made of 316 stainless steel material, and the reaction kettle body 11 can withstand a pressure of 30 MPa. It can be understood that by injecting high-pressure gas into the annular space 113 of the reactor body 11 to increase the pressure in the reactor body 11 , the hydrate in the reactor body 11 can be pressure value, thus ensuring the normal progress of the hydrate reaction.

In the present invention, the resistivity probe assembly 4 is used to measure the resistivity of the hydrate, thereby calculating the total saturation of the hydrate; the infrared fiber probe 2 is used to measure the hydrate dissolved in the hydrate The gas concentration of the gas of the hydrate (or the gas concentration of the gas precipitated from the hydrate is measured), thereby calculating the saturation of the gas dissolved in the hydrate. Because in the process of the hydrate reaction in the reactor body 11, not only the hydrate content and the ion concentration of the hydrate change, but also the gas in the reactor body 11 is dissolved in the hydrate. The amount of the hydrate, or the amount of gas precipitated from the hydrate; through the measurement method of the hydrate saturation measuring device in the present invention, the actual saturation of the hydrate in the reactor body 11 can be obtained. Spend. In addition, the result of measuring the actual saturation of the hydrate through the hydrate saturation measuring device is more accurate, and the hydrate saturation measuring device is simple to operate and has high safety.

In one embodiment, as shown in FIG. 1 , the hydrate saturation measurement device further includes a first adjustment knob 5 and a second adjustment knob 6 ; the resistivity probe assembly 4 is installed through the first adjustment knob 5 On the housing 111, and the first adjustment knob 5 is used to adjust the first depth of the resistivity probe assembly 4 extending into the annular space 113; the infrared fiber probe 2 passes through the second adjustment knob 6 is installed on the housing 111 , and the second adjustment knob 6 is used to adjust the second depth of the infrared fiber probe 2 extending into the annular space 113 . Specifically, the first adjustment knob 5 and the second adjustment knob 6 are provided with a through hole in the middle, and an adjustment member with an external thread is provided on the outer wall, and both are threaded with the outer casing 111, and the infrared fiber probe 2 or the resistivity probe assembly 4 is penetrated in the through hole. It can be understood that the surface where the top of the insulating inner pot 112 is located is perpendicular to the first depth direction; and the surface where the side wall of the insulating inner pot 112 is located is perpendicular to the second depth direction, and the resistivity probe is The component 4 and the infrared fiber probe 2 are both sealed and connected to the outer casing 111 through a rubber ring seal between the outer casing 111 , so as to ensure the tightness of the reactor body 11 , thereby ensuring that the reactor body 11 is sealed. The hydrate reaction proceeded smoothly.

Further, the first depth of the resistivity probe located in the annular space 113 can be adjusted through the first adjustment knob 5, so that the total saturation in the hydrate at different depths in the annular space 113 can be measured; The second depth of the infrared fiber probe 2 in the annular space 113 can be adjusted through the second adjustment knob 6, so that the saturation of the gas dissolved in the hydrate can be calculated. Therefore, through the design of the first adjustment knob 5 and the second adjustment knob 6, the actual saturation of the hydrate at different depths of the annular space 113 can be calculated, and the hydrate saturation measurement device has Multiple sets of measurement results make the measurement results of the hydrate saturation more accurate.

In one embodiment, as shown in FIG. 1 , the hydrate saturation measurement device further includes a temperature control jacket 7 installed on the end face of the outer shell 111 away from the insulating inner container 112 ; the temperature control jacket The jacket 7 includes a cooling channel (not shown) for the flow of cooling fluid, and a cooling fluid inlet 71 and a cooling fluid outlet 72 both communicating with the cooling channel. Preferably, the cooling liquid inlet 71 is connected with the outlet of the external cooling liquid supply device; the cooling liquid outlet 72 is connected with the inlet of the external cooling liquid supply device. It can be understood that the cooling liquid in the temperature control jacket can control the temperature of the hydrate in the reactor body 11, so that the hydrate in the reactor body 11 can react under suitable temperature conditions, Furthermore, the design of the temperature control jacket not only improves the accuracy of the hydrate saturation value measured by the hydrate saturation measurement device, but also improves the safety of the hydrate saturation measurement device.

In one embodiment, as shown in FIG. 1 , the height of the cooling liquid outlet 72 is higher than the height of the cooling liquid inlet 71 . It is understandable that the height of the cooling liquid outlet 72 is higher than the height of the cooling liquid inlet 71 , so that the cooling liquid in the annular space 113 flows countercurrently, making it easier to absorb the heat emitted by the reactor body 11 .

In one embodiment, as shown in FIG. 1 , the casing 111 is provided with a liquid inlet and outlet 1111 and a gas inlet and outlet 1112 which are both connected to the annular space 113 ; the gas inlet and outlet 1112 are arranged on the reactor body 11; the liquid inlet and outlet 1111 are arranged at the lower end of the reactor 1. Understandably, the liquid inlet and outlet 1111 is connected to an external raw liquid supply device, and the gas inlet and outlet 1112 is connected to an external gas supply device. The design of the liquid inlet and outlet 1111 and the gas inlet and outlet 1112 ensures the smooth progress of the measurement work of the hydrate saturation measurement device.

In one embodiment, as shown in FIG. 1 , the outer shell 111 of the insulating inner pot 112 is covered with an insulating layer 1121 . Understandably, since both the resistivity probe assembly 4 and the infrared fiber probe 2 need to extend into the hydrate, and both the resistivity probe assembly 4 and the infrared fiber probe 2 need to be powered on, the The design of the insulating layer 1121 can prevent the influence of the resistivity probe assembly 4 and the infrared fiber probe 2 on the hydrate, and the mutual interference between the probes; the resistivity probe assembly 4 and the infrared fiber probe The two components are inserted into the insulating layer 1121, which avoids the interference of each probe to the hydrate and the mutual interference between the probes. Therefore, the design of the insulating layer 1121 further improves the measurement accuracy of the hydrate saturation measurement device. At the same time, the safety of the hydrate saturation measurement device is also improved.

In one embodiment, the resistivity probe assembly 4 includes a plurality of resistivity probes 41 symmetrically arranged on the housing 11 . as a preference. The resistivity probes 4 on the same side of the housing 11 are located at different heights. It can be understood that a plurality of the resistivity probes can be installed on the casing 111 according to actual needs; in one embodiment, as shown in FIG. 1 , two groups of eight resistivity probes are installed on the casing 111 Probes 41, two sets of resistivity probes 41 are symmetrically installed on the reactor body 11. Understandably, the resistivity probe 41 is installed at different heights of the reactor body 11, so that the total saturation of the hydrate at different heights in the reactor body 11 can be measured; and the resistance The resistivity probe 41 is symmetrically installed on the shell 111 of the reactor body 11, and the comparison of the resistivity of the hydrate solution measured by the two symmetrical resistivity probes 41 can more directly reflect the reactor body. The total saturation of the hydrate in 11, and then the reaction 1 of the hydrate in the reactor body 11 can be compared and analyzed.

The present invention also provides a hydrate saturation measurement system, including a controller and the hydrate saturation measurement device; the resistivity probe assembly 4 and the infrared fiber probe 2 are connected (communicatively connected) to the control device.

Wherein, the controller is used for:

Obtain the resistivity of the hydrate stored in the annular space 113 measured by the resistivity probe assembly 4, input the resistivity into a preset first saturation model, and obtain the first saturation model The output first saturation; the first saturation refers to the total saturation of the hydrate; understandably, the resistivity probe assembly 4 transmits the measured resistivity of the hydrate to the the controller, which calculates the total saturation of the hydrate according to its internal first saturation model, that is, without considering the gas concentration dissolved in the hydrate (or The calculated saturation of the hydrate without considering the gas concentration of the hydrate precipitation).

In one embodiment, the first saturation model is:

Among them, S ₁ is the first saturation (that is, the total saturation of the hydrate); R ₀ is the completely water-saturated formation resistivity (this value can be obtained by looking up a table); R _t is the hydrate The resistivity of the object (that is, the resistivity measured by the resistivity probe assembly 4); n is an empirical parameter.

It can be understood that the first saturation model is obtained by using the Archie formula; the first saturation of natural gas hydrate or free gas in the void can be obtained by the above method, and for the debris of natural gas hydrate For sediment, take n = 1.9386, and for debris sediment containing free gas, take n = 1.62. Further, the first saturation may also be obtained by other saturation models. The first saturation model can accurately calculate the first saturation S ₁ .

Obtain the gas concentration dissolved in the hydrate measured by the infrared fiber probe 2, input the gas concentration into a preset second saturation model, and obtain the second saturation model outputted by the second saturation model. Saturation; the second saturation refers to the saturation of the gas dissolved in the hydrate; understandably, the infrared fiber probe 2 transmits the measured concentration of the gas dissolved in the hydrate To the controller, the controller calculates the saturation of the gas dissolved in the hydrate according to its internal second saturation model.

In one embodiment, the second saturation model is:

Among them, S ₂ is the second degree of saturation; N is the number of hydrates; M is the theoretical relative molecular mass of hydrates; ρ is the density of hydrates; V ₀ is the volume of water when it is completely saturated with water; n _g is the gas concentration (ie molar concentration) dissolved in the hydrate.

该第二饱和度模型可简单的计算出所述第二饱和度S₂，降低了计算的复杂度。Specifically, taking methane as an example, when methane and water form hydrates, the number of hydrates N=5.75, the theoretical relative molecular mass of hydrates M=119.5, and the density of methane hydrates ρ=0.916g/cm3 (273.15K , 2.56MPa), assuming that the volume of water V ₀ =100ML when the reaction system is completely saturated with water, and the methane concentration measured by the infrared fiber probe 2 is 2*10-3mol, then

The second saturation model can simply calculate the second saturation S ₂ , which reduces the computational complexity.

Obtain the saturation difference between the first saturation and the second saturation, and record the saturation difference as the actual saturation of the hydrate (that is, the the saturation of the hydrate). That is, the calculation model of the actual saturation S of the hydrate is _:

It can be understood that, compared with the prior art in which the total saturation of the hydrate is recorded as the actual saturation of the hydrate in the reactor body 11, the hydrate saturation measurement system measured by the present hydrate saturation The actual saturation of the hydrate takes into account the amount of gas dissolved in the hydrate (or the amount of gas evolved from the hydrate), so that the hydrate measured by the hydrate saturation measurement system is saturated The value of degrees is more accurate.

The present invention also provides a hydrate saturation measurement method of the hydrate saturation measurement device, comprising:

Obtain the resistivity of the hydrate stored in the annular space 113 measured by the resistivity probe assembly 4, input the resistivity into a preset first saturation model, and obtain the first saturation model the output first saturation; the first saturation refers to the total saturation of the hydrate;

Obtain the gas concentration dissolved in the hydrate measured by the infrared fiber probe 2, input the gas concentration into a preset second saturation model, and obtain the second saturation model outputted by the second saturation model. degree of saturation; the second degree of saturation refers to the degree of saturation of the gas dissolved in the hydrate;

Obtain the saturation difference between the first saturation and the second saturation, and record the saturation difference as the actual saturation of the hydrate.

It can be understood that the hydrate saturation measurement method is the same as the calculation method of the controller, and details are not repeated here.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. .

Claims (10)

1. A hydrate saturation measuring device, characterized in that it comprises a reactor, a stirrer, an infrared fiber probe for measuring the gas concentration dissolved in the hydrate, and a resistivity probe for measuring the resistivity of the hydrate assembly; the reaction kettle includes a reaction kettle body, the reaction kettle body includes an outer shell and an insulating inner liner, an annular space for storing hydrate is formed between the outer shell and the insulating inner liner; the resistivity probe assembly and the infrared fiber probe are installed on the casing, and the resistivity probe assembly and the infrared fiber probe both pass through the annular space and extend into the insulating inner tank; the agitator is connected to the the reactor body, and the output end of the agitator passes through the outer shell and extends into the annular space. 2 . The hydrate saturation measurement device according to claim 1 , wherein the hydrate saturation measurement device further comprises a first adjustment knob and a second adjustment knob; the resistivity probe assembly passes through the first adjustment knob. 3 . An adjustment knob is installed on the housing, and the first adjustment knob is used to adjust the first depth that the resistivity probe assembly extends into the annular space; the infrared fiber probe is installed through the second adjustment knob on the housing, and the second adjustment knob is used to adjust the second depth of the infrared fiber probe extending into the annular space. 3. The hydrate saturation measurement device according to claim 1, wherein the hydrate saturation measurement device further comprises a temperature control jacket installed on the end face of the outer shell away from the insulating inner tank; The temperature control jacket includes a cooling channel for cooling fluid to flow, and a cooling fluid inlet and a cooling fluid outlet both communicating with the cooling channel. 4 . The hydrate saturation measuring device according to claim 3 , wherein the height of the cooling liquid outlet is higher than the height of the cooling liquid inlet. 5 . 5. The hydrate saturation measuring device according to claim 1, wherein the casing is provided with a liquid inlet and outlet and a gas inlet and outlet which are both connected to the annular space; the gas inlet and outlet are arranged on the The upper end of the reactor body; the liquid inlet and outlet are arranged at the lower end of the reactor. 6 . The hydrate saturation measuring device according to claim 1 , wherein an insulating layer is provided on the outer shell of the insulating inner pot. 7 . 7. A hydrate saturation measurement system, comprising a controller and the hydrate saturation measurement device according to any one of claims 1 to 6; the resistivity probe assembly and the infrared optical fiber the probe is connected to the controller; The controller is used to: Obtain the resistivity of the hydrate stored in the annular space measured by the resistivity probe assembly, input the resistivity into a preset first saturation model, and obtain the output of the first saturation model. the first degree of saturation; the first degree of saturation refers to the total degree of saturation of the hydrate; Obtain the gas concentration dissolved in the hydrate measured by the infrared fiber probe, input the gas concentration into a preset second saturation model, and obtain a second saturation output from the second saturation model degree; the second degree of saturation refers to the degree of saturation of the gas dissolved in the hydrate; Obtain the saturation difference between the first saturation and the second saturation, and record the saturation difference as the actual saturation of the hydrate. 8. A hydrate saturation measurement method of the hydrate saturation measurement device according to any one of claims 1 to 6, characterized in that, comprising: Obtain the resistivity of the hydrate stored in the annular space measured by the resistivity probe assembly, input the resistivity into a preset first saturation model, and obtain the output of the first saturation model. the first degree of saturation; the first degree of saturation refers to the total degree of saturation of the hydrate; Obtain the gas concentration dissolved in the hydrate measured by the infrared fiber probe, input the gas concentration into a preset second saturation model, and obtain a second saturation output from the second saturation model degree; the second degree of saturation refers to the degree of saturation of the gas dissolved in the hydrate; Obtain the saturation difference between the first saturation and the second saturation, and record the saturation difference as the actual saturation of the hydrate. 9. The hydrate saturation measurement method according to claim 8, wherein the first saturation model is:

Wherein, S ₁ is the first degree of saturation; R ₀ is the formation resistivity with complete water saturation; R _t is the resistivity of the hydrate; and n is an empirical parameter. 10. The hydrate saturation measurement method according to claim 8, wherein the second saturation model is:

Among them, S ₂ is the second degree of saturation; N is the number of hydrates; M is the theoretical relative molecular mass of hydrates; ρ is the density of hydrates; V ₀ is the volume of water when it is completely saturated with water; n _g is the gas concentration dissolved in the hydrate.

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