A modular design method for oilfield central processing platforms based on a tray-type structure

Abstract

This invention discloses a modular design method for oilfield central processing platforms based on a tray-type structure. The method comprises the following steps: S1: Classifying oilfield processing flows and scales to form a series of tiers; S2: Determining the system configuration and equipment specifications of each tier of oil and gas processing platform, dividing the system configuration into standard and optional configurations; S3: Treating the relatively fixed equipment and facilities of each tier as fixed parts, forming a relatively fixed basic block, and the differences between each tier as variable parts, further dividing the variable parts into multiple standardized extension modules based on processing capacity; S4: Combining the above standardized extension modules to generate a baseline platform layout scheme for a tray-type main structure; S5: Based on the baseline layout scheme, adjusting different extension modules to generate the overall layout of the actual project. Through the combination of different modules, over one hundred types of central platform overall design schemes can be quickly generated, offering a wide range of applications.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and more particularly, to a modular design method for an oilfield central processing platform based on a tray-type structure. Background Technology

[0002] China builds a large number of new offshore oil and gas platforms every year, and currently has more than 200 such platforms in the country. However, each project is different to some extent, and almost none are exactly the same. They all require customized development, and the drawbacks of this model are becoming increasingly apparent.

[0003] 1) The preliminary research and design cycle of the project is long.

[0004] The entire process, including pre-feasibility study, feasibility study, overall scheme design, basic design, detailed design, and processing design, generally takes more than two years.

[0005] 2) The equipment and materials on each platform have different specifications and can only be procured after the detailed design plan of the project is mature. The procurement mode is project-based and cannot be scaled up for centralized procurement. The procurement cycle is long and the cost is high.

[0006] 3) The platform's systems are highly coupled and are usually built in a serial order, resulting in a long construction cycle.

[0007] 4) The equipment and facilities have a wide variety of specifications and a large number of spare parts, resulting in high maintenance costs in the later stages.

[0008] Standardized design, large-scale procurement, and modular construction are effective ways to solve the above problems for offshore oil and gas platforms. However, central processing platforms vary greatly in processing flow and scale, have a large number of equipment and facilities, and diverse overall layouts. Currently, large-scale standardized design has not been achieved both domestically and internationally. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a design method for constructing an oilfield central processing platform based on a tray-type structure for modular design and combined application.

[0010] To address the aforementioned technical problems, this invention provides a modular design method for an oilfield central processing platform based on a pallet-type structure, comprising the following steps:

[0011] S1: Based on regression analysis of historical project data of the oilfield, classify the oilfield processing procedures and scale to form a series of classifications;

[0012] S2: Determine the system configuration and equipment specifications of each oil and gas processing platform, and based on the regression analysis results, divide the system configuration into standard configuration and optional configuration;

[0013] S3: Summarize the commonalities and differences of each tier platform, divide the platform equipment layout into relatively fixed parts and variable parts. The relatively fixed equipment and facilities of each tier are the fixed parts, forming a relatively fixed basic block. The differences between each tier are the variable parts, and the variable parts are divided into multiple standardized extension modules according to the processing capacity.

[0014] S4: Combine the above standardized extension modules to generate a baseline platform layout scheme for a tray-type main structure;

[0015] S5: Based on the overall layout of the above-mentioned benchmark platform, the overall layout of the actual project is generated by adjusting different extension modules.

[0016] Preferably, in step S1, if the oilfield mainly produces heavy oil and medium oil, the oilfield central processing platform is standardized into four types of processing procedures: full processing of heavy oil, semi-processing of heavy oil, full processing of medium oil, and semi-processing of medium oil.

[0017] Preferably, in step S2, the system configuration includes an oil treatment system, a water treatment and water injection system, a gas treatment system, and a utility system.

[0018] Preferably, in step S3, the basic module is arranged within the axis of the working deck, the bottom deck, and the middle deck.

[0019] Preferably, in step S3, the standardized extension module is arranged outside the axis of the bottom deck, the middle deck, and the top deck.

[0020] Preferably, in step S3, the standardized expansion module includes: a living quarters module, a workover rig module, an external wellhead module, a water treatment module, an oil treatment module, a compressor module, a slug catcher area, a public gas instrument gas nitrogen module, and an electric submersible pump frequency converter control room and an electric submersible pump transformer room module.

[0021] Preferably, in step S3, the processing flow can be adapted by adding or removing equipment and expansion modules, or the processing capacity of different grades can be matched by adjusting the number of equipment and expansion modules, or the processing capacity of equipment can be adjusted to adapt to the changes in processing capacity between adjacent grades.

[0022] Preferably, in step S4, the reference platform is provided with two main decks, a top deck and a bottom deck, a working deck is attached to the bottom deck, and a workover rig deck is partially provided on the top deck.

[0023] Preferably, in step S4, the installation method of the benchmark platform is longitudinal floating.

[0024] The technical advantages of this invention are as follows:

[0025] This invention presents a modular design method for oilfield central processing platforms based on a tray-type structure. Employing a "classification and archiving, modular design, and combined application" approach, it solves the challenge of standardizing the design of offshore oil and gas central processing platforms. By combining different modules, it can quickly generate overall design schemes for over one hundred types of central platforms, offering broad applicability. It avoids the drawback of the large workload associated with conventional serial design schemes, and the standardized modules enable pre-construction without project-based processes, transforming conventional sequential construction into multi-module parallel construction, significantly shortening the platform construction cycle. Attached Figure Description

[0026] Figure 1 This is a modular decomposition diagram of a combined design method for an oilfield central processing platform based on a tray-type structure, according to the present invention.

[0027] Figure 2 This is a reference platform elevation view of a combined design method for an oilfield central processing platform based on a tray-type structure according to the present invention.

[0028] Figure 3 This is a top deck layout diagram of a benchmark platform for a combined design method of an oilfield central processing platform based on a pallet structure, according to the present invention.

[0029] Figure 4 This is a baseline platform bottom deck layout diagram of a combined design method for an oilfield central processing platform based on a pallet structure according to the present invention.

[0030] Figure 5 This is a reference platform working deck layout diagram of a combined design method for an oilfield central processing platform based on a pallet structure according to the present invention.

[0031] Attached reference numerals: 1-Workover rig deck; 2-Top deck; 3-Bottom deck; 4-Working deck; 5-Living quarters module; 6-Workover rig module; 7-External wellhead module; 8-Water treatment module; 9-Oil treatment module; 10-Compressor module; 11-Slug flow trap area; 12-Common gas, instrument gas, and nitrogen module; 13-Electric submersible pump frequency converter control room and Electric submersible pump transformer room module. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the invention.

[0033] like Figures 1 to 5 As shown, a modular design method for an oilfield central processing platform based on a pallet-type structure includes the following steps:

[0034] S1: Based on regression analysis of historical project data of the oilfield, classify the oilfield processing procedures and scale to form a series of classifications;

[0035] S2: Determine the system configuration and equipment specifications of each oil and gas processing platform, and based on the regression analysis results, divide the system configuration into standard configuration and optional configuration;

[0036] S3: Summarize the commonalities and differences of each tier platform, divide the platform equipment layout into relatively fixed parts and variable parts. The relatively fixed equipment and facilities of each tier are the fixed parts, forming a relatively fixed basic block. The differences between each tier are the variable parts, and the variable parts are divided into multiple standardized extension modules according to the processing capacity.

[0037] S4: Combine the above standardized extension modules to generate a baseline platform layout scheme for a tray-type main structure;

[0038] S5: Based on the overall layout of the above-mentioned benchmark platform, the overall layout of the actual project is generated by adjusting different extension modules.

[0039] like Figures 1 to 5 As shown, the technical solution of the present invention specifically includes the following steps:

[0040] S1: Based on regression analysis of historical project data from the Bohai Oilfield, the oilfield processing procedures and scales are classified to form a series of tiers.

[0041] The Bohai Sea primarily produces heavy and medium-quality oil. Depending on the implementation, crude oil processing is divided into dehydration for export and processing to qualified crude oil for export. This invention standardizes the Bohai Oilfield central processing platform into four processing flows: full processing of heavy oil, partial processing of heavy oil, full processing of medium-quality oil, and partial processing of medium-quality oil. Each flow is further subdivided into fourteen levels based on the different oil and water processing volumes.

[0042] S2: Determine the system configuration and equipment specifications of each oil and gas processing platform, and based on the regression analysis results, divide the system configuration into standard configuration and optional configuration.

[0043] The oil processing system includes: slug trap, metering separator, metering heater, heat exchanger, primary heater, primary separator, secondary separator, electrostatic desulfurization (ESD), crude oil buffer tank, secondary heater, ESD heater, ESD booster pump, production water booster pump, export pump, and launch / receiver cylinders, etc.

[0044] The water treatment and water injection system includes: inclined plate, air flotation, production water buffer tank, walnut shell feed pump, walnut shell filter, dual media filter, water injection buffer tank, sewage tank, sewage pump, sludge tank, sludge pump, backwash pump, water injection pump, and launching and receiving cylinder, etc.

[0045] The gas handling system includes: inlet cooler, inlet detergent tank, compressor, coalescing filter and storage tank, etc.

[0046] The public utility systems include: diesel systems, flare systems, open vent systems, closed vent systems, chemical agent systems, public gas instrument gas nitrogen systems, seawater systems, freshwater systems, drinking water systems, marine biological defense systems, domestic sewage systems, heat transfer media systems, and emergency response systems, etc.

[0047] S3: Summarize the commonalities and differences among the various platform tiers, and divide the platform equipment into relatively fixed parts and variable parts.

[0048] The relatively fixed baseline configurations of each section are the fixed parts, arranged within the axis of working deck 4 and bottom deck 3, forming a relatively fixed basic block. The optional configurations with significant differences between sections are the variable parts, and the variable parts are divided into N standardized expansion modules according to the processing capacity, arranged outside the axis of bottom deck 3 and top deck 2 and workover rig deck 1, so as to flexibly add or remove platform decks.

[0049] The standardized expansion modules include: living quarters module 5, workover rig module 6, external wellhead module 7, water treatment module 8, oil treatment module 9, compressor module 10, slug flow trap area 11, public gas, instrument gas, and nitrogen module 12, and electric submersible pump frequency converter control room and electric submersible pump transformer room module 13.

[0050] S4: Combine the above standardized extension modules to generate a baseline platform overall solution.

[0051] The standard platform features two external wellhead modules (7) located to the north and south, employing drilling vessels for well drilling and modular workover rigs for well workover. The platform comprises three decks: the top deck (2), the bottom deck (3), and the working deck (4). The main structure utilizes a conventional pallet-type design, and the platform is installed via longitudinal floating towing.

[0052] The overall layout of the workover rig platform includes: a drilling BOP module, 7 external wellhead modules (one each in the north and south), a modular workover rig, and workover rig auxiliary facilities and rooms;

[0053] like Figure 3 As shown, the top deck 2 is generally arranged with a living quarters module 5, a heat medium boiler, a public gas instrument nitrogen module 12, a water treatment module 8, a natural gas compressor module 10, a chemical agent injection skid, a crude oil buffer tank, a primary heater, a primary separator, a metering separator, a metering heater, a secondary separator, a production water booster pump and filter, an electric desulfurization booster pump and filter, and a flare arm.

[0054] like Figure 4 As shown, the bottom deck 3 is arranged as follows:

[0055] West of Axis 1: Two submersible pump transformer control rooms, one on the north and one on the south, along with two second-floor room modules (Module 13) are located on the south side of Axis 1 and the north side of Axis 2. These include an emergency machine room, emergency switch room, battery room, FM200 room, machine repair room, work room, storage room, transformer room, central control room, and central control equipment room. Between Axis 1 and 2: The diesel fire pump room, heat medium boiler, and DVS are located on the outer side of Axis 2. The diesel fire pump room, three seawater lift pumps, and DVS are located on the south side of Axis 2. The water injection pump, hot oil circulation pump skid, domestic sewage treatment plant, drinking water tank and pump, seawater coarse filter, automatic backwash filter, and replacement pump are located between Axis 2 and 3. Only a walkway is located on the outer sides of Axis 2 and 3. Between Axis 2 and 3: Crude oil receiving / receiving pylons, freshwater tanks and pumps, sewage tanks and pumps, production water buffer tanks, backwash water pumps, qualified oil heat exchangers, diesel tanks and pumps, and well kill pumps are located between Axis 2 and 3. Between axes 3 and 4: One external wellhead module 7 is located on the south side of axis A and the north side of axis B, respectively; between axes A and B, there are crude oil export pumps, closed-loop tanks, flare separators, secondary heaters, electro-desorption heaters, propane skids, carbon dioxide fire extinguishing skids, and ignition plates. East side of axis 4: One production manifold and one water injection manifold are located on the north and south sides, respectively, outside axes A and B; an electro-desorption separator is located between axes A and B.

[0056] like Figure 5 As shown, the working deck 4 is arranged as follows: one external wellhead module 7 is arranged on the south side of axis A and the north side of axis B, respectively, and can be used to install the wellhead control panel and production tree; the north side of axis B is equipped with the opening and drainage tank, opening and drainage pump, sludge tank, sludge pump, opening and drainage channel and opening and drainage channel pump; the south side of axis A is equipped with the opening and drainage tank, opening and drainage pump, hot oil discharge tank, hot oil discharge pump, opening and drainage channel, opening and drainage channel pump, closed drainage pump and flare separator pump.

[0057] S5: When applied to actual production projects, the platform's corresponding tiers are determined based on the actual production data of the oilfield; based on the overall layout of the above-mentioned benchmark platform, the overall layout of the actual project is generated by adjusting different extended modules.

[0058] like Figures 1 to 5 As shown, the engineering application technical solution of the present invention includes the following steps:

[0059] S1 determines the corresponding tier of the platform based on the actual production data of the oilfield.

[0060] If the S2 standard deliverables library already contains corresponding categorized design deliverables, they can be used directly.

[0061] If there is no standardized deliverable document for the corresponding S3 grade, the overall layout of the grade will be generated by adjusting different extended modules based on the overall layout of the benchmark platform, and the corresponding design deliverable will be included in the standardized deliverable library.

[0062] The more S4 is promoted and applied, the more complete the standardized results library becomes, and the higher the application efficiency.

[0063] The following two typical examples illustrate how to evolve different types of processing platforms from a benchmark platform (heavy oil full processing D2 grade with external wellhead).

[0064] Example 1: The baseline platform evolved into a central processing platform without a wellhead.

[0065] 1. Remove the external wellhead modules 7 on the north and south sides; remove the workover rig deck; remove the ESP metering heater, metering separator, production manifold and water injection manifold on the top deck 2; remove the ESP frequency converter control room and ESP transformer room module 13 on the bottom deck 3.

[0066] 2) The working deck 4 is moved to the middle of shafts 3 and 4.

[0067] Example 2: The baseline platform evolved into a heavy oil semi-processing zone wellhead center platform:

[0068] 1. Top deck 2: Remove the 4-shaft east side secondary separator and corresponding deck; remove the crude oil buffer tank, production water booster pump and electrostatic precipitator booster pump, and reserve the corresponding area;

[0069] 2. Bottom deck 3: Cancel the external electro-detonator of shaft 4 and the corresponding deck; cancel the secondary heater and electro-detonator between shafts 3 and 4, and reserve the corresponding area.

[0070] It should be noted that, Figures 1 to 5 In the diagram, the top is the north side and the bottom is the south side, according to the direction indicated by the numbers.

[0071] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A modular design method for an oilfield central processing platform based on a tray-type structure, characterized in that, Includes the following steps: S1: Based on regression analysis of historical project data of the oilfield, classify the oilfield processing procedures and scale to form a series of classifications; S2: Determine the system configuration and equipment specifications of each oil and gas processing platform, and based on the regression analysis results, divide the system configuration into standard configuration and optional configuration; S3: Summarize the commonalities and differences of each tier platform, divide the platform equipment layout into relatively fixed parts and variable parts. The relatively fixed equipment and facilities of each tier are the fixed parts, forming a relatively fixed basic block. The differences between each tier are the variable parts, and the variable parts are divided into multiple standardized extension modules according to the processing capacity. S4: Combine the above standardized extension modules to generate a baseline platform layout scheme for a tray-type main structure; S5: Based on the overall layout of the above-mentioned benchmark platform, the overall layout of the actual project is generated by adjusting different extension modules.

2. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S1, if the oilfield mainly produces heavy oil and medium oil, the oilfield central processing platform is standardized into four types of processing procedures: full processing of heavy oil, semi-processing of heavy oil, full processing of medium oil, and semi-processing of medium oil.

3. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S2, the system configuration includes an oil treatment system, a water treatment and water injection system, a gas treatment system, and a utility system.

4. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S3, the basic modules are arranged within the axes of the working deck, the bottom deck, and the middle deck.

5. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S3, the standardized extension modules are arranged outside the axes of the bottom deck, the middle deck, and the top deck.

6. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S3, the standardized expansion modules include: a living quarters module, a workover rig module, an external wellhead module, a water treatment module, an oil treatment module, a compressor module, a slug catcher area, a public gas instrument gas nitrogen module, and an electric submersible pump frequency converter control room and an electric submersible pump transformer room module.

7. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S3, different processing flows can be adapted by adding or removing equipment and expansion modules, or the number of equipment and expansion modules can be adjusted to match the processing capacity of different tiers, or the processing capacity of equipment and facilities can be adjusted to adapt to changes in processing capacity between adjacent tiers.

8. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S4, the reference platform is provided with two main decks, a top deck and a bottom deck, a working deck is attached to the bottom deck, and a workover rig deck is partially installed on the top deck.

9. The modular design method for an oilfield central processing platform based on a tray-type structure according to claim 1, characterized in that, In step S4, the installation method of the benchmark platform is longitudinal floating.

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