A combined design method of oilfield central processing platform based on frame structure

Abstract

The application discloses a kind of based on frame structure's oilfield central processing platform combined design method, comprising the following steps: S1: oilfield processing flow and scale classification is carried out, and form series classification;S2: the system configuration and equipment specification of each file oil and gas processing platform are determined, and system configuration is divided into standard configuration and optional configuration;S3: the commonality and difference of each classification platform are summarized, and platform equipment arrangement is divided into relatively fixed part and variable part;S4: the above-mentioned basic block is decomposed into multiple relatively independent standardized function modules;S5: the above-mentioned standardized expansion module and standardized function module are combined to generate a benchmark platform overall arrangement scheme;S6: on the basis of the above-mentioned benchmark overall arrangement, the overall arrangement of actual project is generated by adjusting different expansion modules;Using the method of "classification classification, module design, combination application", the problem that marine oil and gas central processing platform is difficult to standardize design is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, in particular, is especially related to a combined design method of an oilfield central processing platform based on a frame structure. BACKGROUND

[0002] China builds a large number of new offshore oil and gas platforms every year. At present, there are more than two hundred offshore oil and gas platforms in China, but each project has more or less differences, and there is almost no completely same case, which needs to be customized and developed. The disadvantages of this mode are increasingly prominent:

[0003] 1) The pre-project research and design cycle is long

[0004] From the pre-feasibility study, feasibility study, overall scheme design, basic design, detailed design, processing design, etc., it generally takes more than two years.

[0005] 2) The equipment and material specifications of each platform are different and can only be started after the project detailed design scheme is mature. The procurement mode is project-based and cannot be scaled up. The procurement cycle is long and the cost is high.

[0006] 3) The coupling degree of each system of the platform is high, and the construction is usually in series, which takes a long time.

[0007] 4) The equipment and facilities are of various specifications, and there are many spare parts, so the post-operation and maintenance cost is high.

[0008] The implementation of standardized design, large-scale procurement and modular construction of offshore oil and gas platforms is an effective way to solve the above problems. However, the central processing platform has large differences in processing flow and scale, and the number of equipment is large, and the overall layout is various, so large-scale standardized design has not been realized at home and abroad. SUMMARY

[0009] The technical problem to be solved by the present application is to provide a design method for designing different standardized modules based on a frame structure and combining them to form an oilfield central processing platform.

[0010] In order to solve the above technical problems, the present application provides a combined design method of an oilfield central processing platform based on a frame structure, comprising the following steps:

[0011] S1: regression analysis combined with oilfield historical project data, oilfield processing flow and scale classification, and formation of a series of subfiles;

[0012] S2: determining the system configuration and equipment specifications of each subfile oil and gas processing platform, and combining the regression analysis results to divide the system configuration into standard configuration and optional configuration;

[0013] S3: Summarize the commonality and difference of each sub-platform, divide the platform equipment layout into relatively fixed part and variable part, the equipment and facilities of each sub-platform are fixed part, form a relatively fixed basic block, the difference items of each sub-platform are variable part, and the variable part is divided into multiple standardized expansion modules according to the processing capacity;

[0014] S4: Decompose the above basic block into multiple relatively independent standardized function modules;

[0015] S5: Combine the above standardized expansion modules and standardized function modules to generate a frame structure reference platform overall layout scheme;

[0016] S6: On the basis of the above reference overall layout, adjust different expansion modules to tailor the overall layout of the actual project.

[0017] Preferably, in step S1, the oil field mainly uses heavy oil and medium oil, and the oil field center processing platform is standardized into four types of processing flow: heavy oil full processing, heavy oil semi-processing, medium oil full processing and medium oil semi-processing.

[0018] Preferably, in step S2, the system configuration includes oil processing system, water treatment and water injection system, gas processing system and public system.

[0019] Preferably, in step S3, the basic block is arranged in the working deck, the bottom deck and the middle deck axis.

[0020] Preferably, in step S3, the standardized expansion module is arranged outside the bottom deck, the middle deck axis and the top deck.

[0021] Preferably, in step S3, the standard expansion module includes: living building module, drilling and workover rig module, external wellhead module, water treatment module, oil processing module, compressor module, slug catcher area and electric submersible pump frequency converter control room and electric submersible pump transformer room module.

[0022] Preferably, in step S3, by increasing or decreasing equipment and facilities and expansion modules to adapt to different processing flow, or by adjusting the number of equipment and facilities and expansion modules to match the processing capacity of different sub-ranges, or by adjusting the processing capacity of equipment and facilities to adapt to the change of processing capacity between adjacent two sub-ranges.

[0023] Preferably, in step S4, the standardized function module includes laboratory module, main switch room module, main transformer and central control room module, emergency machine and machine repair room module, paint room module and public gas instrument gas nitrogen module.

[0024] Preferably, in step S5, the reference platform overall design is H-shaped structure with wide sides and narrow middle.

[0025] Preferably, in step S5, the reference platform body is provided with four decks and two outer hanging wellhead areas, and the wellhead areas are drilled by a drilling ship and a modular workover rig.

[0026] The technical effect of the present application is that:

[0027] The technical effect of the present application is that: BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a reference platform elevation view of the combined design method of the oilfield central processing platform based on the frame structure of the present application;

[0029] Figure 2 is a reference platform top deck layout of the combined design method of the oilfield central processing platform based on the frame structure of the present application;

[0030] Figure 3 is a reference platform middle deck layout of the combined design method of the oilfield central processing platform based on the frame structure of the present application;

[0031] Figure 4 is a reference platform bottom deck layout of the combined design method of the oilfield central processing platform based on the frame structure of the present application;

[0032] Figure 5 is a reference platform working deck layout of the combined design method of the oilfield central processing platform based on the frame structure of the present application.

[0033] Reference signs: 1-top deck; 2-middle deck; 3-bottom deck; 4-working deck; 12-living building module; 13-drilling and workover rig module; 14-outer hanging wellhead module; 15-water treatment module; 16-oil treatment module; 17-compressor module; 18-pellet trap area; 19-electric submersible pump frequency converter control room and electric submersible pump transformer room module; 20-laboratory module; 21-main switch room module; 22-main transformer and central control room module; 23-emergency machine and machine repair room module; 24-painting room module; 25-public gas instrument gas nitrogen module. DETAILED DESCRIPTION

[0034] The application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the application and implement it, but the embodiments are not as limitations of the application.

[0035] As shown in the drawings, Figures 1 to 5 The technical scheme of the application comprises the following steps:

[0036] S1: Based on the regression analysis of historical project data of Bohai oilfield, the oilfield treatment process and scale classification are carried out to form a series of grading.

[0037] Bohai is mainly heavy oil and medium oil. According to different support implementation, crude oil treatment is divided into dehydration and external transportation and treatment to qualified crude oil. The application standardizes the Bohai oilfield central treatment platform into four types of treatment processes: heavy oil full treatment, heavy oil semi-treatment, medium oil full treatment and medium oil semi-treatment.

[0038] According to the different oil and water treatment capacity, each process is subdivided into fourteen grades.

[0039] S2: Determine the system configuration and equipment specification of each grade oil and gas treatment platform, and combine the regression analysis results and historical project statistical probability to divide the system configuration into standard configuration and optional configuration.

[0040] The oil treatment system includes: slug catcher, metering separator, metering heater, heat exchanger, primary heater, primary separator, secondary separator, electric desalter, crude oil buffer tank, secondary heater, electric desalter heater, electric desalter booster pump, produced water booster pump, external transportation pump and receiving and sending ball cylinder, etc.

[0041] The water treatment and water injection system includes: inclined plate, air flotation, produced water buffer tank, walnut shell feeding pump, walnut shell filter, double medium filter, water injection buffer tank, sewage tank, sewage pump, waste oil tank, waste oil pump, backwash pump, water injection pump and receiving and sending ball cylinder, etc.

[0042] The gas treatment system includes: inlet cooler, inlet detergent tank, compressor, coalescing filter and storage tank, etc.

[0043] The public system includes: diesel system, flare system, open drainage system, closed drainage system, chemical agent system, public gas / instrument gas / nitrogen system, seawater system, fresh water system, drinking water system, marine bio-system, domestic sewage system, heat medium system and emergency machine system, etc.

[0044] S3: Summarize the commonness and difference of each grading platform, and divide the platform equipment into relatively fixed part and variable part.

[0045] The relatively fixed reference configuration of each grading is the fixed part, which is arranged in the axis of the working deck 4, the bottom deck 3 and the middle deck 2 to form a relatively fixed basic module.

[0046] The optional configuration with large differences between each sub-grade is a variable part, and the variable part is divided into N standardized extension modules according to the processing capacity, and is arranged on the bottom deck 3, the middle deck 2 outside the axis and the top deck 1, so as to flexibly increase or decrease the platform deck.

[0047] The standardized extension module includes a living building module 12, a drilling and workover rig module 13, an external wellhead module 14, a water treatment module 15, an oil treatment module 16, a compressor module 17, a plug catcher area 18 and an electric submersible pump frequency converter control room and electric submersible pump transformer room module 19.

[0048] S4: According to the processing function and the demand of modular construction, the basic group is divided into a plurality of relatively independent standardized function modules, and the electrical room module is separated from the platform main structure with an independent support structure.

[0049] The standardized function module includes a public gas instrument gas nitrogen module 25, a main switch room module 21, a main transformer and central control room module 22, an emergency machine and machine repair room module 23, a paint room module 24 and a laboratory module 20; wherein the public gas instrument gas nitrogen module 25 includes an air compressor, a filter, a drying device, a membrane type nitrogen making device, a public gas tank, an instrument gas tank and a nitrogen storage tank and related auxiliary facilities; the main switch room module 21 includes a main switch room, a high-voltage switch room, an electrical pump main switch room and a frequency converter room; the main transformer and central control room module 22 includes a main transformer room, a central control room, a central control equipment room, an FM200 room and a working room; the emergency machine and machine repair room module 23 includes an emergency generator room, an emergency switch room, a battery room, an FM200 room, a machine repair room and a storage room.

[0050] S5: The above standardized modules are combined to generate a benchmark platform overall scheme.

[0051] The benchmark platform is provided with two external wellhead areas in the north and south, and uses a drilling ship to drill and a modular workover rig to work over.

[0052] The benchmark platform includes four decks: a top deck 1, a middle deck 2, a bottom deck 3 and a working deck 4. The main body adopts a conventional frame structure, and the platform installation mode is longitudinal floating and dragging; the benchmark platform platform as a whole is H-shaped, wide on both sides and narrow in the middle, the crane is arranged on the structure main stand column A2, B2, which meets the support ship and hoisting requirements, the crane is fixed on the structure main shaft, which is beneficial to the weight reduction of the platform and the reduction of the crane vibration, avoids the crane vibration problem caused by the conventional project crane stand column external suspension installation, and can realize a large amount of structural weight reduction.

[0053] As Figure 2As shown, the top deck 1 is arranged as follows: living quarter module 12, thermal medium boiler, water treatment module 15, natural gas compressor module, drilling BOP module, external wellhead area module 14 (one on each of the north and south sides), modular workover rig, workover rig auxiliary facilities and rooms, and flare boom.

[0054] As shown, the middle deck 2 is arranged as follows: Figure 3 1-axis west side: one electric submersible pump transformer / frequency converter two-story room module is arranged on the south side of A-axis and the north side of B-axis respectively, emergency engine and engine repair room module 23, and public gas instrument nitrogen gas module 25. Between 1-axis and 2-axis: laboratory module 20 is arranged on the north side of B-axis, and DVS and oil separator are arranged on the south side of A-axis; two-story main switch room module 21 and two-story main transformer and central control room module 22 are arranged between A-axis and B-axis. Between 2-axis and 3-axis: fuel gas scrubbing liquid tank, coalescing filter, and fuel gas storage tank are arranged on the north side of B-axis; inclined plate, air floatation, walnut shell filter, double medium filter, and water injection buffer tank are arranged between A-axis and B-axis; slug catcher and oil and gas room module are arranged on the south side of A-axis. Between 3-axis and 4-axis: one external wellhead area is arranged on each of the south side of A-axis and the north side of B-axis; primary separator, primary heater, crude oil buffer tank, and chemical injection skid are arranged between A-axis and B-axis. 4-axis east side: wellhead metering separator and metering heater are arranged on the north side of B-axis; production water booster pump and electric dehydrating booster pump are arranged on the south side of A-axis.

[0055] As shown, the bottom deck 3 is arranged as follows: Figure 4

[0056] 1-axis west side: water injection receiving and sending cylinder is arranged. Between 1-axis and 2-axis: one diesel fire pump is arranged on each of the outside of A-axis and B-axis, and three seawater lifting pumps are arranged on the south side of A-axis; water injection pump, hot oil circulating pump skid, sewage treatment device, drinking water tank and pump, seawater coarse filter, automatic backwash filter, and displacement pump are arranged between A-axis and B-axis. Between 2-axis and 3-axis: only walkways are arranged on the outside of A-axis and B-axis; crude oil receiving and sending cylinder, fresh water tank and pump, sewage tank and pump, production water buffer tank, backwash water pump, qualified oil heat exchanger, diesel tank and pump, and well killing pump are arranged between A-axis and B-axis; between 3-axis and 4-axis: one external wellhead area is arranged on each of the south side of A-axis and the north side of B-axis; crude oil export pump, closed discharge tank, flare knockout drum, secondary heater, electric dehydrating heater, propane bottle skid, carbon dioxide fire extinguishing skid, and ignition tray are arranged between A-axis and B-axis. 4-axis east side: one set of production manifold and water injection manifold is arranged on each of the outside of A-axis and B-axis; electric dehydrating separator is arranged between A-axis and B-axis.

[0057] As shown, the working deck is arranged as follows: Figure 5

[0058] ​​One of the north and south external hanging wellhead area is arranged on the south side of A axis and the north side of B axis, and the Christmas tree and wellhead control panel are arranged; the open drain tank, open drain pump, waste oil tank, waste oil pump, open drain groove and open drain groove pump are arranged on the north side of B axis; the open drain tank, open drain pump, hot oil discharge tank, hot oil discharge pump, open drain groove, open drain groove pump, closed drain pump and flare knockout drum pump are arranged on the south side of A axis.

[0059] S6: In actual production project application, the corresponding sub-grade of the platform is determined according to the actual allocation data of the oil field; on the basis of the overall arrangement of the above-mentioned standard clause, the overall arrangement of the actual project is generated by adjusting different extension modules.

[0060] As shown in Figures 1 to 5 The engineering practical application technical scheme of the present application comprises the following steps:

[0061] S1: determining the corresponding sub-grade of the platform according to the actual allocation data of the oil field; S2: if the design result file of the corresponding sub-grade has already existed in the standardized result library, it can be directly used; S3: if the corresponding sub-grade has not yet had a standardized result file, the overall arrangement of the sub-grade is generated by adjusting different extension modules on the basis of the overall arrangement of the standard clause, and the corresponding design result is included in the standardized result library; S4: the more the application is promoted, the more perfect the standardized result library is, and the higher the application efficiency is.

[0062] The following two typical examples are used to illustrate how to generate different types of processing platforms through the evolution of the standard clause platform (heavy oil full processing D2 sub-grade with external hanging wellhead):

[0063] Example 1: the standard clause platform evolves into a center processing platform without wellhead:

[0064] 1. Cancel the south and north external hanging wellhead, cancel the workover rig module of the top deck 1, cancel the electric submersible pump frequency converter control room and electric submersible pump transformer room module 19, metering heater, metering separator, production manifold and water injection manifold of the middle and bottom decks.

[0065] 2. The electric desalting module is translated from the bottom deck 3 to the top deck 1;

[0066] 3. The compressor module is translated to the vicinity of the 4th axis; the water treatment equipment is changed from a double-layer module to a single-layer arrangement.

[0067] 4. The working deck 4 is translated to the middle of the 3rd and 4th axes.

[0068] Example 2: the standard clause platform evolves into a heavy oil semi-processing center platform with wellhead:

[0069] 1. The top deck 1 remains unchanged;

[0070] 2. Mid-deck 2: The second-stage separator on the east side of shaft 4 and the corresponding deck are cancelled; the crude oil buffer tank, the production water booster pump and the electrostatic precipitator booster pump are cancelled, and the corresponding area is reserved.

[0071] 3. Bottom deck 3: Remove the external electro-detonator and corresponding deck of shaft 4; remove the secondary heater and electro-detonator between shafts 3 and 4, and reserve the corresponding area.

[0072] 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.

[0073] 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 frame structure, characterized in that, Includes the following steps: S1: Combining historical project data regression analysis 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: Decompose the above basic blocks into multiple relatively independent standardized functional modules; S5: Combine the above-mentioned standardized extension modules and standardized functional modules to generate a framework-structured benchmark platform overall layout scheme; S6: Based on the overall layout of the above-mentioned baseline, 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 frame structure according to claim 1, characterized in that, In step S1, the oilfield mainly produces heavy and medium oil, and 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 frame 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 frame 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 frame 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 frame structure according to claim 1, characterized in that, In step S3, the standardized expansion modules include: a living quarters module, a drilling and workover rig module, an external wellhead module, a water treatment module, an oil treatment module, a compressor module, a slug catcher area, 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 frame 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 frame structure according to claim 1, characterized in that, In step S4, the standardized functional modules include a laboratory module, a main switch room module, a main transformer and central control room module, an emergency machine and machine repair room module, a paint room module, and a public gas, instrument gas, and nitrogen module.

9. The modular design method for an oilfield central processing platform based on a frame structure according to claim 1, characterized in that, In step S5, the benchmark platform is designed as an H-shaped structure that is wide on both sides and narrow in the middle.

10. The modular design method for an oilfield central processing platform based on a frame structure according to claim 1, characterized in that, In step S5, the main body of the benchmark platform is equipped with four decks and two external wellhead areas, and the wellhead areas adopt drilling ships for drilling and modular well workover rigs.

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