Method and device for calculating the volume of a waste drilling fluid collection container of an offshore platform

Abstract

The application provides a kind of offshore platform waste drilling fluid collection container volume calculation method, which comprises: based on the size of the wellbore drilled by the offshore platform, combined with the drilling method used, the maximum value of the waste drilling fluid generated in unit well section depth that needs to be collected and treated is calculated; the total volume of the waste drilling fluid in the well section is calculated by the maximum value of the waste drilling fluid and the well section depth; based on the total volume of the well section and the reasonable transfer times between the offshore platform and the land, the total volume of the waste drilling fluid collection container is calculated. The application is based on the environmental protection treatment requirement of zero emission of waste drilling fluid in polar cold sea area, and the volume of waste drilling fluid container of offshore operation platform is designed in detail, considering the generation speed of waste drilling fluid and the space limitation of offshore operation platform, and further considering the ability of waste drilling fluid transfer between offshore platform and land when waste drilling fluid is transported back to land.

Description

Technical Field

[0001] This invention relates to the field of oil and gas development and exploration technology, and more specifically, to a method and apparatus for calculating the volume of a waste drilling fluid collection container for an offshore platform. Background Technology

[0002] The ecosystems of polar cold seas are extremely fragile. Oil spills, working fluid leaks, and the decomposition and leakage of natural gas hydrates from underlying formations caused by the melting of ice and permafrost during drilling operations can all cause significant damage to the environment. Local laws and regulations impose extremely stringent environmental requirements on polar drilling operations, demanding zero emissions. This leads to increased drilling difficulty and higher operating costs. Therefore, the harmless treatment and recovery of drilling fluids are crucial to solving the problem of drilling fluid pollution in polar marine environments.

[0003] Currently, there are three methods for collecting and treating waste drilling fluid:

[0004] (1) Collect all waste drilling fluid in a special container and then transport it back to land for further processing;

[0005] (2) Drill a reinjection well, collect all the waste drilling fluid in a special container, and reinject it into the well after treatment;

[0006] (3) First, collect all the waste drilling fluid in a special container, and then reuse it after treatment.

[0007] All three of these solutions require the design of specialized containers to collect and temporarily store the waste drilling fluid generated during the drilling process. However, the space on offshore platforms in polar cold seas is limited, making it impossible to accommodate bulky waste drilling fluid collection containers. Therefore, the volume design of waste drilling fluid collection containers for offshore platforms in polar cold seas must meet both the rate of waste drilling fluid generation during drilling and the space constraints of the offshore platform. If it is necessary to transport the waste drilling fluid back to land, the capacity for transferring waste drilling fluid between the offshore platform and land must also be considered.

[0008] To address the problems of existing technologies, this invention provides a method and apparatus for calculating the volume of waste drilling fluid collection containers on offshore platforms. Summary of the Invention

[0009] To address the problems of the prior art, this invention provides a method for calculating the volume of a waste drilling fluid collection container on an offshore platform, the method comprising the following steps:

[0010] S1. Based on the borehole size to be drilled on the offshore platform and the drilling method adopted, calculate the maximum value of waste drilling fluid to be collected and treated per unit well depth.

[0011] S2. The total volume of the waste drilling fluid in the well section is calculated using the maximum value of the waste drilling fluid and the well section depth.

[0012] S3. Based on the total volume of the well section and the reasonable number of transfers between the offshore platform and the land, the total volume of the waste drilling fluid collection container is calculated.

[0013] According to an embodiment of the present invention, step S1 includes:

[0014] We collect data on all wellbore dimensions drilled by offshore platforms and the drilling methods corresponding to each wellbore size in order to calculate the volume expansion factor for each wellbore size.

[0015] According to an embodiment of the present invention, step S1 includes:

[0016] If a wellbore of a certain size is drilled using the jet drilling method, then its corresponding volume expansion factor is 1.

[0017] According to an embodiment of the present invention, step S1 includes:

[0018] When the wellbore size is Φ660.4mm and jet drilling is not used, the volume expansion factor is 1.3.

[0019] When the wellbore size is Φ444.5mm and jet drilling is not used, the volume expansion factor is 1.15.

[0020] When the wellbore size is Φ311.2mm and jet drilling is not used, the volume expansion factor is 1.1.

[0021] When the wellbore size is Φ215.9mm and jet drilling is not used, the volume expansion factor is 1.1.

[0022] According to an embodiment of the present invention, step S1 includes:

[0023] Based on the wellbore size and the volume expansion factor, the volume of waste drilling fluid per unit well depth corresponding to each wellbore size is calculated, and the maximum value of the waste drilling fluid is obtained by comparison.

[0024] According to one embodiment of the present invention, the volume of abandoned drilling fluid per unit well depth for each wellbore size is calculated using the following formula:

[0025] V F=0.75πD 2 H0K

[0026] Among them, V F The volume of abandoned drilling fluid per unit well depth, expressed in meters (m). 3 D represents the wellbore size in meters; H0 represents the depth per unit well section in meters; and K represents the volume expansion factor.

[0027] According to one embodiment of the present invention, the total volume of the abandoned drilling fluid in the well section is calculated using the following formula:

[0028] V = V F ×H

[0029] Where V represents the total volume of the abandoned drilling fluid in the well section, in meters. 3 H represents the well depth corresponding to the wellbore size, in meters (m).

[0030] According to one embodiment of the present invention, the total volume of the waste drilling fluid collection container is calculated using the following formula:

[0031]

[0032] Where V0 represents the total volume of the waste drilling fluid collection container, in m 3 V represents the total volume of the abandoned drilling fluid section in meters. 3 n represents the reasonable number of transfers.

[0033] According to another aspect of the invention, a storage medium is also provided, which includes a series of instructions for performing the steps of the method described in any of the preceding claims.

[0034] According to another aspect of the present invention, a device for calculating the volume of a waste drilling fluid collection container for an offshore platform is also provided, which performs a method for calculating the volume of a waste drilling fluid collection container for an offshore platform as described in any of the preceding claims, the device comprising:

[0035] The maximum value module is used to calculate the maximum amount of waste drilling fluid that needs to be collected and treated per unit well depth, based on the wellbore size to be drilled by the offshore platform and the drilling method adopted.

[0036] The well section total volume module is used to calculate the total well section volume of the waste drilling fluid based on the maximum value of the waste drilling fluid and the well section depth.

[0037] The total container volume module is used to calculate the total volume of the waste drilling fluid collection container based on the total volume of the well section and the reasonable number of transfers between the offshore platform and the land.

[0038] This invention provides a method and apparatus for calculating the volume of waste drilling fluid collection containers on offshore platforms. Compared with existing technologies, it offers the following advantages: Based on the environmental protection requirements for zero-discharge waste drilling fluid treatment in polar cold sea regions, the invention refines the design of the waste drilling fluid container volume for offshore operating platforms. It considers the generation rate of waste drilling fluid and the space constraints of offshore operating platforms, and further considers the ability to transfer waste drilling fluid between the offshore platform and land when transporting it back to land. This invention provides more accurate volume calculation for waste drilling fluid containers, meets environmental protection requirements, saves space on offshore platforms, and improves transfer efficiency.

[0039] Other features and advantages of the invention will be set forth in the description which follows, 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 description, claims, and drawings. Attached Figure Description

[0040] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0041] Figure 1 A flowchart illustrating a method for calculating the volume of a waste drilling fluid collection container for an offshore platform according to an embodiment of the present invention is shown.

[0042] Figure 2 A schematic diagram illustrating the process of collecting and transporting waste water-based drilling fluid back to land, according to an embodiment of the present invention, is shown; and

[0043] Figure 3 A structural block diagram of a waste drilling fluid collection container volume calculation device for an offshore platform according to an embodiment of the present invention is shown. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0045] Existing technology (201320869791.2) proposes a waste drilling fluid treatment system and its storage device. The storage device includes a base plate and a weir plate positioned above the base plate and arranged circumferentially. Both the upper wall of the base plate and the inner wall of the weir plate are lined with an impermeable layer. Waste drilling fluid generated during drilling can be discharged into this storage device for storage, completely replacing the traditional method of digging pits to store drilling fluid. This reduces pollution of soil, groundwater, and surface water, protecting the ecological environment near the well site. Simultaneously, the storage device composed of the base plate and weir plate allows for transportation and relocation, realizing the recycling of the storage device and saving production costs. However, this existing technology mainly involves the structural design of the waste drilling fluid storage device, without providing a more precise design and calculation of its volume, thus failing to meet the space constraints of offshore platforms.

[0046] Existing technology (201920789742.5) proposes a waste drilling fluid treatment system and its storage device, including a collection tank located on the ground, with an inlet and an outlet. A filter tank is installed inside the collection tank, rotatably connected to it. A driving component is installed on the collection tank, and a scraper is installed on the filter tank. Through the filtration action of the filter tank, solids and liquids in the waste are separated, facilitating the collection of usable liquids for reuse, reducing waste and saving costs. During the rotation of the filter tank, the scraper simultaneously cleans the inner wall of the collection tank, allowing liquid splashing from the filter tank to be scraped off and flow out from the outlet, while also keeping the inner wall of the collection tank clean and reducing subsequent cleaning workload. However, this existing technology mainly involves the structural design of the waste drilling fluid storage device, without more precise design and calculation of its volume, and cannot meet the space constraints of offshore platforms.

[0047] Existing technology (201920964284.4) proposes a water-based waste drilling fluid harmless treatment device, including a waste drilling fluid pool, a debonding reaction tank, an oxidation reaction settling tank, a waste slurry pool, and a feeding mechanism. A main feed pump is provided between the waste drilling fluid pool and the debonding reaction tank. A centrifugal feed pump and a centrifuge are provided between the debonding reaction tank and the oxidation reaction settling tank. The outlet of the centrifuge is connected to the oxidation reaction settling tank via a pipeline, and the waste residue outlet of the centrifuge is connected to the waste slurry pool. The outlet of the oxidation reaction settling tank is connected to an external water pump, and the mud outlet is connected to the waste slurry pool. The feeding mechanism includes multiple sets of liquid preparation and storage tanks and a reagent feed pump, which are respectively connected to the debonding reaction tank and the oxidation reaction settling tank. This invention has a reasonable structure, and the device is lightweight, simple, and easy to disassemble, assemble, and relocate. The treated waste drilling fluid wastewater and the leachate from the solidified material can both meet the secondary standard for integrated wastewater discharge. The treated waste liquid can be reused. However, the existing technology mainly involves the structural design of a device for the harmless treatment of water-based waste drilling fluid, and does not propose a special container for waste drilling fluid suitable for offshore platforms.

[0048] Figure 1 A flowchart illustrating a method for calculating the volume of a waste drilling fluid collection container for an offshore platform according to an embodiment of the present invention is shown.

[0049] like Figure 1 As shown, in step S101, based on the size of the wellbore to be drilled by the offshore platform and in combination with the drilling method adopted, the maximum value of waste drilling fluid to be collected and treated within a unit well depth is calculated.

[0050] like Figure 1 As shown, in step S102, the total volume of the waste drilling fluid in the well section is calculated by using the maximum value of the waste drilling fluid and the well section depth.

[0051] like Figure 1 As shown, in step S103, the total volume of the waste drilling fluid collection container is calculated based on the total volume of the well section and the reasonable number of transfers between the offshore platform and the land.

[0052] Specifically, step S101 includes: collecting data on all wellbore sizes drilled by the current offshore platform and the drilling method corresponding to each wellbore size, in order to calculate the volume expansion coefficient corresponding to each wellbore size.

[0053] In one embodiment, if the drilling method for a certain wellbore size is jet drilling, then its corresponding volume expansion factor is 1. When the wellbore size is Φ660.4mm and jet drilling is not used, its volume expansion factor is 1.3; when the wellbore size is Φ444.5mm and jet drilling is not used, its volume expansion factor is 1.15; when the wellbore size is Φ311.2mm and jet drilling is not used, its volume expansion factor is 1.1; when the wellbore size is Φ215.9mm and jet drilling is not used, its volume expansion factor is 1.1.

[0054] In one embodiment, the commonly used wellbore size series for polar cold sea drilling are: Φ914.4mm, Φ660.4mm, Φ444.5mm, Φ311.2mm, and Φ215.9mm. The depths of each size well section are represented by H1, H2, H3, H4, and H5, respectively.

[0055] Specifically, when drilling the Φ914.4mm~Φ444.5mm section, due to the large wellbore size and high mechanical drilling speed, it will be the stage with the highest load for collecting drilling waste;

[0056] Specifically, the load on collecting drilling waste will be significantly lighter when drilling the Φ311.2mm and Φ215.9mm well sections compared to the two sections mentioned above. Therefore, the capacity of the drilling waste collection system designed to meet the operational requirements of these two well sections is already more than sufficient for these two sections.

[0057] Specifically, the wellbore will enlarge to a certain extent during drilling. Based on theoretical analysis and practical experience, the wellbore volume expansion rates for the Φ660.4mm, Φ444.5mm, Φ311.2mm, and Φ215.9mm sections are set at 30%, 15%, 10%, and 10%, respectively. If the Φ914.4mm section is run using a jet drilling method, wellbore volume expansion is not allowed, and therefore, the wellbore volume expansion rate for this section is not considered and is set to 0. In actual calculations, the volume expansion coefficient = 1 + wellbore volume expansion rate, that is, the wellbore volume expansion coefficient K for the Φ914.4mm, Φ660.4mm, Φ444.5mm, Φ311.2mm, and Φ215.9mm sections takes values ​​of 1, 1.3, 1.15, 1.1, and 1.1, respectively.

[0058] Further, in step S101, based on the wellbore size and the volume expansion coefficient, the volume of waste drilling fluid per unit well depth corresponding to each wellbore size is calculated, and the maximum value of waste drilling fluid is obtained by comparison.

[0059] Practical experience shows that drilling fluid accounts for 30% of the wellbore volume. The dilution volume of the drilling fluid is generally calculated as a factor of 10. The waste drilling fluid volume per unit well depth for each wellbore size can be calculated using the following formula:

[0060] V F =0.75πD 2 H0K

[0061] Among them, V F The volume of abandoned drilling fluid per unit well depth, expressed in meters (m). 3 D represents the wellbore size in meters; H0 represents the depth per unit well section in meters; and K represents the volume expansion factor.

[0062] Specifically, in step S102, the total volume of the abandoned drilling fluid in the well section is calculated using the following formula:

[0063] V = V F ×H

[0064] Where V represents the total volume of the abandoned drilling fluid in the well section, in meters. 3 H represents the well depth corresponding to the wellbore size, in meters (m).

[0065] In one embodiment, the drilling fluid dilution volume (volume of waste drilling fluid per unit well depth) and the total well section volume can be calculated, as shown in Table 1, where the unit well section depth is taken as 1m:

[0066] Table 1 Drilling Fluid Dilution Volume and Total Well Section Volume

[0067]

[0068] In one embodiment, in step S103, the total volume of the waste drilling fluid collection container is calculated using the following formula:

[0069]

[0070] Where V0 represents the total volume of the waste drilling fluid collection container, in m 3 V represents the total volume of the abandoned drilling fluid section in meters. 3 n represents the reasonable number of transfers.

[0071] In practice, because waste drilling fluid is transported or processed in batches, the storage capacity of the drilling fluid collection system must be determined by considering both the total amount of waste drilling fluid generated and the number of batches transported or processed during the drilling process. This will yield a more reasonable result. Dividing the total volume of waste drilling fluid in each well section by the corresponding reasonable number of transports gives the maximum capacity required for each waste drilling fluid transport, as shown in Table 2.

[0072] Table 2. Volume of Drilling Fluid Waste Collection Containers

[0073]

[0074] In summary, to meet the needs of drilling operations, the storage capacity of the waste drilling fluid collection system should be set according to the maximum volume of waste fluid transferred in a single operation in Table 2. That is, the total volume of the waste drilling fluid collection container should be designed according to the maximum volume of waste fluid transferred in a single operation in Table 2.

[0075] Figure 2 A schematic diagram of the process for collecting and transporting waste water-based drilling fluid back to land, according to an embodiment of the present invention, is shown.

[0076] like Figure 2 As shown, the areas where drilling fluid spills on the drilling platform are mainly distributed around the drilling rig and drilling fluid treatment system. Floor drains are installed on the decks of the drilling rig and drilling fluid treatment system. When these decks are flushed, the drilling fluid is discharged along with the flushing water into the manifold, then into the drilling fluid collection tank, and finally pressurized by the waste mud pump and discharged into the waste drilling fluid storage tank. Waste drilling fluid generated during the drilling process is directly pumped into the storage tank by the mud pump. After the transport ship arrives, the waste drilling fluid is pumped onto the transport ship by a booster pump and transported back to land for further processing.

[0077] The equipment is equipped according to weight as follows: drilling fluid collection tank, waste drilling fluid discharge pump, waste drilling fluid storage tank and booster pump.

[0078] In addition, the following equipment is also required:

[0079] (a) Install flat steel bars and floor drains in the drilling fluid treatment area and on the drilling deck;

[0080] (b) Install the appropriate manifold;

[0081] (c) Fabricate drilling fluid collection tanks and waste drilling fluid storage tanks that meet the design requirements;

[0082] (d) Add waste mud pumps and booster pumps;

[0083] (e) The corresponding pipelines and control systems.

[0084] The present invention provides a method and apparatus for calculating the volume of a waste drilling fluid collection container on an offshore platform. This method can also be used in conjunction with a computer-readable storage medium storing a computer program. Executing the computer program runs the method for calculating the volume of a waste drilling fluid collection container on an offshore platform. The computer program is capable of executing computer instructions, which include computer program code. The computer program code can be in the form of source code, object code, executable file, or some intermediate form.

[0085] Computer-readable storage media may include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0086] It should be noted that the contents of computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0087] Figure 3 A structural block diagram of a waste drilling fluid collection container volume calculation device for an offshore platform according to an embodiment of the present invention is shown, which is used to perform a method for calculating the volume of a waste drilling fluid collection container for an offshore platform.

[0088] like Figure 3 As shown, a waste drilling fluid collection container volume calculation device 300 for an offshore platform includes: a maximum value module 301, a well section total volume module 302, and a container total volume module 303.

[0089] Specifically, the maximum value module 301 is used to calculate the maximum value of waste drilling fluid that needs to be collected and treated per unit well depth, based on the wellbore size to be drilled by the offshore platform and the drilling method adopted.

[0090] Specifically, the well section total volume module 302 is used to calculate the total well section volume of the waste drilling fluid using the maximum value of the waste drilling fluid and the well section depth.

[0091] Specifically, the total container volume module 303 is used to calculate the total volume of the waste drilling fluid collection container based on the total volume of the well section and the reasonable number of transfers between the offshore platform and the land.

[0092] Furthermore, the maximum value module 301 includes a volume expansion coefficient unit, which is used to collect all wellbore size data of the current offshore platform drilling and the drilling method corresponding to each wellbore size, so as to calculate the volume expansion coefficient corresponding to each wellbore size.

[0093] In one embodiment, if the drilling method for a certain wellbore size is jet drilling, then its corresponding volume expansion factor is 1. When the wellbore size is Φ660.4mm and jet drilling is not used, its volume expansion factor is 1.3; when the wellbore size is Φ444.5mm and jet drilling is not used, its volume expansion factor is 1.15; when the wellbore size is Φ311.2mm and jet drilling is not used, its volume expansion factor is 1.1; when the wellbore size is Φ215.9mm and jet drilling is not used, its volume expansion factor is 1.1.

[0094] Furthermore, the maximum value module 301 includes a comparison unit, which is used to calculate the volume of abandoned drilling fluid within a unit well depth corresponding to each well size based on the wellbore size and the volume expansion coefficient, and compare to obtain the maximum value of abandoned drilling fluid.

[0095] In one embodiment, the volume of abandoned drilling fluid per unit well depth for each wellbore size is calculated using the following formula:

[0096] V F =0.75πD 2 H0K

[0097] Among them, V F The volume of abandoned drilling fluid per unit well depth, expressed in meters (m). 3 D represents the wellbore size in meters; H0 represents the depth per unit well section in meters; and K represents the volume expansion factor.

[0098] In one embodiment, the total volume of the abandoned drilling fluid in the well section is calculated using the following formula:

[0099] V = V F ×H

[0100] Where V represents the total volume of the abandoned drilling fluid in the well section, in meters. 3 H represents the well depth corresponding to the wellbore size, in meters (m).

[0101] In one embodiment, the total volume of the waste drilling fluid collection container is calculated using the following formula:

[0102]

[0103] Where V0 represents the total volume of the waste drilling fluid collection container, in m 3 V represents the total volume of the abandoned drilling fluid section in meters. 3 n represents the reasonable number of transfers.

[0104] In summary, the present invention provides a method and apparatus for calculating the volume of waste drilling fluid collection containers on offshore platforms. Compared with existing technologies, this invention offers the following advantages: Based on the environmental protection requirements for zero-discharge waste drilling fluid treatment in polar cold sea regions, the volume of waste drilling fluid containers on offshore operating platforms is designed in detail. This takes into account the generation rate of waste drilling fluid and the space constraints of offshore operating platforms, and further considers the ability to transfer waste drilling fluid between the offshore platform and land when transporting it back to land. The present invention provides more accurate volume calculation for waste drilling fluid containers, meets environmental protection requirements, saves space on offshore platforms, and improves transfer efficiency.

[0105] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0106] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0107] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0108] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0109] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0110] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for calculating the volume of a waste drilling fluid collection container on an offshore platform, characterized in that, Based on the environmental protection requirements for zero-discharge treatment of waste drilling fluid in polar cold sea regions, the method includes the following steps: S1. Based on the borehole size to be drilled on the offshore platform and the drilling method adopted, calculate the maximum value of waste drilling fluid to be collected and treated per unit well depth. S2. The total volume of the waste drilling fluid in the well section is calculated using the maximum value of the waste drilling fluid and the well section depth. S3. Based on the total volume of the well section and the reasonable number of transfers between the offshore platform and the land, the total volume of the waste drilling fluid collection container is calculated, wherein the total volume of the waste drilling fluid collection container is designed based on the maximum volume of waste fluid in a single transfer. Step S1 includes: collecting data on all wellbore dimensions drilled by the current offshore platform and the drilling method corresponding to each wellbore size to calculate the volume expansion coefficient corresponding to each wellbore size; if the drilling method for a certain wellbore size is jet drilling, the corresponding volume expansion coefficient is 1; when the wellbore size is Φ660.4 mm and jet drilling is not used, the volume expansion coefficient is 1.3; based on the wellbore size and the volume expansion coefficient, the volume of waste drilling fluid per unit well depth corresponding to each wellbore size is calculated, and the maximum value of the waste drilling fluid is obtained by comparison. The volume of abandoned drilling fluid per unit well depth for each wellbore size can be calculated using the following formula: in, The volume of abandoned drilling fluid per unit well depth, expressed in meters (m). 3 ; Indicates the wellbore size, in meters (m). The depth per unit well section is expressed in meters (m). This represents the volume expansion factor.

2. The method for calculating the volume of a waste drilling fluid collection container for an offshore platform as described in claim 1, characterized in that, Step S1 includes: When the wellbore size is Φ444.5 mm and jet drilling is not used, the volume expansion factor is 1.

15. When the wellbore size is Φ311.2 mm and jet drilling is not used, the volume expansion factor is 1.

1. When the wellbore size is Φ215.9 mm and jet drilling is not used, the volume expansion factor is 1.

1.

3. The method for calculating the volume of a waste drilling fluid collection container for an offshore platform as described in claim 1, characterized in that, Step S1 includes: Based on the wellbore size and the volume expansion factor, the volume of waste drilling fluid per unit well depth corresponding to each wellbore size is calculated, and the maximum value of the waste drilling fluid is obtained by comparison.

4. The method for calculating the volume of a waste drilling fluid collection container for an offshore platform as described in claim 1, characterized in that, The total volume of the abandoned drilling fluid in the well section is calculated using the following formula: in, This represents the total volume of the abandoned drilling fluid in the well section, in meters. 3 ; This indicates the depth of the well section corresponding to the wellbore size, expressed in meters (m).

5. The method for calculating the volume of a waste drilling fluid collection container for an offshore platform as described in claim 1, characterized in that, The total volume of the waste drilling fluid collection container can be calculated using the following formula: in, This represents the total volume of the waste drilling fluid collection container, in meters. 3 ; This represents the total volume of the abandoned drilling fluid in the well section, in meters. 3 ; Indicates the reasonable number of transfers.

6. A storage medium, characterized in that, It includes a series of instructions for performing the method steps as described in any one of claims 1-5.

7. A device for calculating the volume of a waste drilling fluid collection container on an offshore platform, characterized in that, The apparatus for calculating the volume of a waste drilling fluid collection container for an offshore platform as described in any one of claims 1-5 comprises: The maximum value module is used to calculate the maximum value of waste drilling fluid that needs to be collected and treated per unit well depth, based on the well diameter to be drilled by the offshore platform and the drilling method adopted. The well section total volume module is used to calculate the total well section volume of the waste drilling fluid based on the maximum value of the waste drilling fluid and the well section depth. The total container volume module is used to calculate the total volume of the waste drilling fluid collection container based on the total volume of the well section and the reasonable number of transfers between the offshore platform and the land.

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