Device and method for analyzing components of high-temperature and high-pressure formation fluid with high hydrogen sulfide content

Abstract

The invention discloses a high-temperature high-pressure high-hydrogen-sulfide-content formation fluid component analysis device and method, through a matched hydrogen sulfide treatment device, after the high-hydrogen-sulfide-content formation fluid is subjected to a single removal experiment, tail gas is subjected to harmless treatment, and the single removal experiment test of the high-hydrogen-sulfide-content formation fluid is realized; the high-hydrogen-sulfide-content formation fluid is divided into high-hydrogen-sulfide-content natural gas and high-hydrogen-sulfide-free crude oil through a single removal experiment, components of the high-hydrogen-sulfide-content formation fluid and the high-hydrogen-sulfide-content crude oil are tested through a gas chromatograph, and then well flow components of the high-hydrogen-sulfide-content formation fluid are obtained through calculation according to the gas-oil ratio of the formation fluid. Laboratory personnel have no safety risk, operation with a positive pressure type respirator in the whole process is avoided, and the requirements for exploration and development of ultra-deep and high-hydrogen-sulfide-content oil and gas reservoirs are met.

Description

Technical Field

[0001] The invention belongs to the technical field of geological development experiments in petroleum exploration, and in particular relates to a device and method for analyzing components of high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid. Background Art

[0002] At present, the national standard for reservoir fluid analysis is GB / T26981, which is stipulated in the 2020 "Analysis Methods for Physical Properties of Reservoir Fluids". However, the above standard is applicable to the analysis of conventional samples such as black oil, condensate gas, volatile oil, dry and wet gas. There is no hydrogen sulfide tail gas treatment device. If it is necessary to test hydrogen sulfide-containing samples, a positive pressure respirator must be worn throughout the experiment, which is inconvenient to operate. Or the experiment must be carried out after removing hydrogen sulfide, resulting in the loss of hydrogen sulfide components. It cannot be applied to the analysis needs of high hydrogen sulfide-containing formation fluid components.

[0003] The existing experimental equipment is not suitable for the analysis of fluid components in formations with high hydrogen sulfide content. There is no experimental gas exhaust treatment experimental equipment. A positive pressure respirator is required during the experiment, which is inconvenient to operate. Another experimental equipment removes hydrogen sulfide before conducting the experiment, resulting in the lack of hydrogen sulfide components, and is not suitable for the analysis of fluid components in formations with high hydrogen sulfide content. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high-temperature, high-pressure, high-hydrogen sulfide formation fluid component analysis device and method to address the technical problem that high-temperature, high-pressure, high-hydrogen sulfide formation fluid components are difficult to test in view of the deficiencies in the above-mentioned prior art.

[0005] The present invention adopts the following technical solutions:

[0006] A high-temperature, high-pressure, high-hydrogen-sulfide-containing formation fluid component analysis device comprises an autoclave connected to a single-separation bottle, which are respectively connected to a gas volume measuring device and a component measuring device.

[0007] Specifically, the autoclave is connected to a formation fluid storage tank, and the formation fluid storage tank contains high-temperature, high-pressure, and high-hydrogen sulfide-containing formation fluid.

[0008] Furthermore, a first high-pressure pump is provided at the formation fluid storage tank.

[0009] Specifically, the autoclave is connected to a second high-pressure pump.

[0010] Specifically, the gas volume measuring device and the component measuring device are respectively connected to the hydrogen sulfide processing device.

[0011] Furthermore, the gas volume measuring device adopts a gas meter.

[0012] Furthermore, the component measuring device adopts a chromatograph.

[0013] Specifically, the autoclave is arranged inside a thermostatic box.

[0014] Another technical solution of the present invention is a method for analyzing components of high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid, comprising the following steps:

[0015] The autoclave is kept at a constant temperature to the formation temperature; the high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid in the formation fluid storage tank is transferred into the autoclave; based on the formation pressure, the formation fluid in the autoclave is discharged at a constant pressure into a single-degassing bottle under atmospheric conditions, the oil volume is measured using a single-degassing bottle, the gas volume is measured using a gas meter, and the gas-oil ratio is calculated; the component content of the oil sample and the gas sample is measured using a chromatograph, and the gas after the component test is discharged outside the laboratory through a hydrogen sulfide treatment device; the component content of the high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid is obtained by recalculating the oil component, the gas component and the gas-oil ratio.

[0016] Specifically, the molar fraction of component i in the high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid is X fi for:

[0017]

[0018] Among them, W d is the mass of single deoiling, M d is the average molar mass of single deoiling, x i is the mole fraction of the single deoiled component i, GOR O is the ratio of single degassed oil, y i is the mole fraction of sulfur-containing single degassing component i.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The invention discloses a high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid component analysis device, which aims at solving the test problems of high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid component analysis without a hydrogen sulfide tail gas treatment experimental device, high experimental risk and lack of hydrogen sulfide component data in well flow components; a single desorption experimental test device for high-hydrogen sulfide-containing formation fluid is established by matching a hydrogen sulfide treatment device; the high-hydrogen sulfide-containing formation fluid is divided into natural gas with high hydrogen sulfide content and crude oil without hydrogen sulfide through a single desorption experiment, and the components are tested respectively by using a gas chromatograph, and then the well flow components of the high-hydrogen sulfide-containing formation fluid are obtained by calculation according to the gas-oil ratio of the formation fluid; compared with the existing formation fluid component analysis experimental device, a single desorption experimental device for high-hydrogen sulfide-containing formation fluid is established, hydrogen sulfide is zero-emitted throughout the process, there is no need to wear a positive pressure respirator, the operation is simple and safer, the H2S component in the formation fluid is added to the well flow, the component analysis is more comprehensive, it is closer to the actual formation situation, and meets the exploration and development needs of ultra-deep and high hydrogen sulfide-containing oil and gas reservoirs.

[0021] Furthermore, by providing a high-pressure pump, the high hydrogen sulfide-containing formation fluid can always be kept at the formation pressure.

[0022] Furthermore, by using a matching hydrogen sulfide treatment device, after a single removal experiment is carried out on a formation fluid with high hydrogen sulfide content, the tail gas is treated to be harmless, thereby realizing a single removal experiment test on a formation fluid with high hydrogen sulfide content.

[0023] Furthermore, the autoclave is arranged inside a thermostatic box and maintained at the formation temperature, thereby simulating a high-temperature and high-pressure formation state of a high-hydrogen sulfide-containing formation fluid.

[0024] A method for analyzing components of high-temperature, high-pressure and high-hydrogen-sulfide-containing formation fluids, wherein the high-hydrogen-sulfide-containing formation fluids are separated by single degassing, and the amounts of single deoiling and single degassing are measured respectively, and the well flow of the high-hydrogen-sulfide-containing formation fluids can be obtained by calculation, and the experimental tail gas containing hydrogen sulfide is treated by absorbing hydrogen sulfide, so that laboratory personnel do not need to wear positive pressure respirators to operate, and the gas discharged into the air does not contain hydrogen sulfide, thereby ensuring that there is no pollution to the air and no harm to the experimental personnel.

[0025] In summary, the present invention can perform component analysis of high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluids, with zero hydrogen sulfide emissions throughout the process, ensuring the safety of laboratory personnel, and the components contain hydrogen sulfide, which will not cause component loss, meeting the needs of exploration and development of ultra-deep, high-hydrogen sulfide-containing oil and gas reservoirs.

[0026] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the device of the present invention.

[0028] Among them: 11. first high-pressure pump; 12. second high-pressure pump; 2. formation fluid storage tank; 3. autoclave; 4. constant temperature box; 5. single-degassing bottle; 6. gas meter; 7. chromatograph; 8. hydrogen sulfide absorption liquid; 9. hydrogen sulfide treatment device. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0033] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0034] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0035] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0036] The present invention provides a high-temperature, high-pressure, high-hydrogen sulfide formation fluid component analysis device. By matching a hydrogen sulfide treatment device, after a single desorption experiment is conducted on the high-hydrogen sulfide formation fluid, the tail gas is harmlessly treated to achieve a single desorption experiment test of the high-hydrogen sulfide formation fluid; the high-hydrogen sulfide formation fluid is divided into natural gas with high hydrogen sulfide content and crude oil without hydrogen sulfide through the single desorption experiment, and their components are tested using a gas chromatograph respectively, and then the high-hydrogen sulfide formation fluid well flow component is calculated based on the gas-oil ratio of the formation fluid. Compared with the existing formation fluid component analysis experimental device, the experimental device has zero hydrogen sulfide emissions throughout the entire process, and there is no safety risk for laboratory personnel, avoiding the need to operate with a positive pressure respirator throughout the entire process, meeting the exploration and development needs of ultra-deep, high-hydrogen sulfide oil and gas reservoirs.

[0037] See also Figure 1 The present invention discloses a high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid component analysis device, which includes a high-pressure pump, a formation fluid storage tank 2, a high-pressure autoclave 3, a constant temperature box 4, a single-degassing bottle 5, a gas meter 6, a chromatograph 7 and a hydrogen sulfide treatment device 9.

[0038] The high-pressure pump includes a first high-pressure pump 11 and a second high-pressure pump 12. The first high-pressure pump 11 is connected to one end of the formation fluid storage tank 2 through a pipeline, and the other end is connected to the autoclave 3. The other end of the formation fluid storage tank 2 and the autoclave 3 are connected to the single-separation bottle 5 through a pipeline, and the second high-pressure pump 12 is connected to the autoclave 3; the outlet end of the single-separation bottle 5 is connected to the hydrogen sulfide treatment device 9, and the hydrogen sulfide treatment device 9 is used to recover and treat the hydrogen sulfide absorption liquid 8 discharged from the single-separation bottle 5, and discharge the gas after the test component to the outside of the laboratory.

[0039] A gas meter 6 and a chromatograph 7 are provided between the single degassing bottle 5 and the hydrogen sulfide treatment device 9. The gas meter 6 is used to measure the gas volume and calculate the gas-oil ratio; the chromatograph 7 is used to measure the component contents of the oil sample and the gas sample.

[0040] The analysis process steps of the high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device of the present invention are as follows:

[0041] S1. Use a downhole sampler to obtain high-temperature, high-pressure, high-hydrogen sulfide formation fluid;

[0042] S2, using a thermostat 4 to keep the autoclave 3 at a constant temperature to the formation temperature;

[0043] S3, using the first high-pressure pump 11 to transfer the high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid in the formation fluid storage tank 2 into the autoclave 3;

[0044] S4, setting the second high-pressure pump 12 to the formation pressure, discharging the formation fluid in the autoclave 3 to the single-degassing bottle 5 under atmospheric conditions at a constant pressure, measuring the oil volume using the single-degassing bottle 5, measuring the gas volume using the gas meter 6, and calculating the gas-oil ratio;

[0045]

[0046] Among them, GOR o is the ratio of degassed oil, in mol / mol; p1 is the atmospheric pressure on that day, in megapascals (MPa); V1 is the volume of the released gas at room temperature and atmospheric pressure, in cubic centimeters (cm 3 ); R is the molar gas constant, expressed in megapascal cubic centimeters per mole [MPa*cm 3 / (mol*K)], take 8.3145; Z1 is the gas deviation coefficient at room temperature and atmospheric pressure (approximately equal to 1); T1 is room temperature, the unit is Kelvin (K).

[0047] S5, using the chromatograph 7 to measure the component contents of the oil sample and the gas sample, and passing the gas after the component test through the hydrogen sulfide treatment device 9 and then discharged outside the laboratory;

[0048] S6. The content of high-temperature, high-pressure, high-hydrogen-sulfide formation fluid components is recalculated based on the oil component and the gas component (containing hydrogen sulfide) and the gas-oil ratio (the ratio of the amount of substances of single degassing and single deoiling).

[0049] The mole fraction X of component i in high temperature, high pressure and high hydrogen sulfide content formation fluid fi for:

[0050]

[0051] Among them, W d is the mass of deoiled product, in grams (g); M d is the average molar mass of the single deoiled oil, in grams per mole (g / mol); x i is the mole fraction of the single deoiled component i, dimensionless unit; GOR O is the ratio of single degassed oil, in mol / mol; y i is the mole fraction of sulfur-containing single degassing component i, dimensionless unit.

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0053] Table 1 is the analysis results of the components of high temperature, high pressure and high hydrogen sulfide formation fluids of the present invention.

[0054]

[0055]

[0056]

[0057] Table 2 shows the analysis results of conventional experimental device for component analysis of high temperature, high pressure and high hydrogen sulfide content formation fluids

[0058]

[0059]

[0060]

[0061] Compared with the analysis results of conventional experimental devices for analyzing components of high-temperature, high-pressure, and high-hydrogen sulfide-containing formation fluids (Table 2), the analysis results of the high-temperature, high-pressure, and high-hydrogen sulfide-containing formation fluids of the present invention (Table 1) have increased the hydrogen sulfide content in the gas components and the well flow components, which are closer to the actual underground conditions and meet the needs of exploration and development of ultra-deep, high-hydrogen sulfide-containing oil and gas reservoirs.

[0062] The present invention establishes a single removal test device for high hydrogen sulfide content formation fluid, and uses a matching hydrogen sulfide treatment device to achieve zero hydrogen sulfide emission throughout the process, thereby ensuring the safety of laboratory personnel; and separates high-temperature, high-pressure, high hydrogen sulfide content formation fluid, and obtains high-temperature, high-pressure, high hydrogen sulfide content formation fluid components according to the gas-oil ratio of the formation fluid.

[0063] In summary, the present invention provides a high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid component analysis device. Aiming at the characteristics of high-hydrogen sulfide-containing formation fluid component analysis experiments being dangerous and difficult to test, the device is equipped with a hydrogen sulfide treatment device to keep hydrogen sulfide in a fully enclosed state during operation, and then the high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid components are obtained by recalculating the tested gas and oil components according to the gas-oil ratio, thereby solving the problem that high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid components are difficult to test, ensuring the safety of personnel in the experiment and meeting the needs of exploration and development of ultra-deep, high-hydrogen sulfide-containing oil and gas reservoirs.

[0064] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device, characterized in that: The invention comprises a high pressure autoclave (3), wherein the high pressure autoclave (3) is connected to a single-degassing bottle (5), and the single-degassing bottle (5) is respectively connected to a gas volume measuring device and a component measuring device.

2. The high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device according to claim 1 is characterized in that: The autoclave (3) is connected to a formation fluid storage tank (2), and the formation fluid storage tank (2) contains high-temperature, high-pressure, and high-hydrogen sulfide-containing formation fluid.

3. The high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device according to claim 2 is characterized in that: A first high-pressure pump (11) is provided at the formation fluid storage tank (2).

4. The high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device according to claim 1, characterized in that: The autoclave (3) is connected to a second high-pressure pump (12).

5. The high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device according to claim 1 is characterized in that: The gas volume measuring device and the component measuring device are respectively connected to the hydrogen sulfide processing device (9).

6. The high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device according to claim 5 is characterized in that: The gas volume measuring device adopts a gas meter (6).

7. The high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device according to claim 5, characterized in that: The component measuring device adopts a chromatograph (7).

8. The high-temperature, high-pressure, high-hydrogen-sulfide formation fluid component analysis device according to claim 1 is characterized in that: The autoclave (3) is arranged inside the thermostatic box (4).

9. A method for analyzing components of high-temperature, high-pressure, high-hydrogen-sulfide formation fluid, characterized in that: The high-temperature, high-pressure, high-hydrogen-sulfide-containing formation fluid component analysis device according to any one of claims 1 to 8 comprises the following steps: The autoclave is kept at a constant temperature to the formation temperature; the high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid in the formation fluid storage tank is transferred into the autoclave; based on the formation pressure, the formation fluid in the autoclave is discharged at a constant pressure into a single-degassing bottle under atmospheric conditions, the oil volume is measured using a single-degassing bottle, the gas volume is measured using a gas meter, and the gas-oil ratio is calculated; the component content of the oil sample and the gas sample is measured using a chromatograph, and the gas after the component test is discharged outside the laboratory through a hydrogen sulfide treatment device; the component content of the high-temperature, high-pressure, high-hydrogen sulfide-containing formation fluid is obtained by recalculating the oil component, the gas component and the gas-oil ratio.

10. The method for analyzing components of high-temperature, high-pressure, high-hydrogen-sulfide formation fluid according to claim 9, characterized in that: The mole fraction X of component i in high temperature, high pressure and high hydrogen sulfide content formation fluid fi for: Among them, W d is the mass of single deoiling, M d is the average molar mass of single deoiling, x i is the mole fraction of the single deoiled component i, GOR o is the ratio of single degassed oil, y i is the mole fraction of sulfur-containing single degassing component i.

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