A multi-layered three-dimensional marine electric-driven fracturing system

Abstract

This invention discloses a multi-layered, three-dimensional marine electric-driven fracturing system. The high-pressure manifold system is located on the main deck near the stern; the acid supply and distribution system is located in the open area of ​​the A deck; the fracturing pumping system is located in front of the high-pressure manifold system on the main deck; the sand mixing system is located in front of the fracturing pumping system on the main deck; the sand supply and delivery system is located in front of the sand mixing system and extends from the double bottom to the B deck; the liquid addition system and mixing system are located on the platform deck; the frequency conversion control system is located in front of the sand supply and delivery system on the main deck; and the transformer system is located in front of the sand supply and delivery system on the platform deck. This invention, through the rational planning of the layout of each system, fully utilizes the ship's cabin space, greatly increasing the storage capacity of fracturing raw materials, and providing a solid material foundation for realizing large-scale continuous marine fracturing operations.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for offshore oil and gas exploration and development. More specifically, this invention relates to a... Background Technology

[0002] Acidizing and fracturing are key technologies for reservoir stimulation and production enhancement in oil and gas fields. These technologies have been widely applied in onshore oil and gas fields, forming a complete and mature process system. These production enhancement technologies using acidizing and fracturing are also applicable to offshore oil and gas exploration and development. Marine acidizing and fracturing equipment specifically includes seawater filtration and storage, guar gum mixing and sand mixing equipment, proppant storage and delivery equipment, fracturing pumping equipment, high-pressure manifolds, and high-pressure hose rollers.

[0003] Currently, offshore oil and gas production enhancement operations typically involve installing equipment on the decks of large barges or deploying it on offshore platforms. However, this method requires reinstalling the equipment for each operation, and is limited by the deck space of the vessel or platform, resulting in a limited supply of equipment and raw materials, making large-scale production enhancement operations impossible. Summary of the Invention

[0004] To achieve these objectives and other advantages according to the invention, a preferred embodiment of the invention provides a multi-layered, three-dimensional marine electric-driven fracturing system, comprising a high-pressure manifold system, an acid supply and distribution system, a fracturing pumping system, a sand mixing system, a sand supply and delivery system, a liquid addition system, a mixing system, a seawater filtration system, a frequency converter control system, and a transformer system. The high-pressure manifold system is located on the main deck near the stern. The acid supply and distribution system is located in the open area of ​​the A deck. The fracturing pumping system is located in front of the high-pressure manifold system on the main deck. The sand mixing system is located in front of the fracturing pumping system on the main deck. The sand supply and delivery system is located in front of the sand mixing system and extends from the double bottom to the B deck. The liquid addition system and the mixing system are located on the platform deck. The frequency converter control system is located in front of the sand supply and delivery system on the main deck. The transformer system is located in front of the sand supply and delivery system on the platform deck.

[0005] According to a preferred embodiment of the present invention, the high-pressure manifold system includes a high-pressure hose roller, a high-pressure connecting manifold, and a high-pressure manifold skid, wherein the two outlets of the high-pressure manifold skid are respectively connected to the high-pressure hose roller through the high-pressure connecting manifold.

[0006] According to a preferred embodiment of the present invention, the acid supply system includes a mixed acid skid and an acid tank, the outlet of the acid tank is connected to the inlet of the acid supply pump of the mixed acid skid, and the outlet of the mixed acid skid is connected to the fracturing pumping system through a pipeline.

[0007] According to a preferred embodiment of the present invention, the fracturing pumping system includes multiple fracturing skids, the outlet of which is connected to the inlet of the high-pressure manifold skid.

[0008] According to a preferred embodiment of the present invention, the sand mixing system includes two sand mixing skids, one spiral sand conveyor, and multiple base liquid buffer tanks. The outlet of the spiral sand conveyor is connected to the two sand mixing skids respectively through a switching device. The inlet of the suction centrifugal pump of the sand mixing skid is connected to the base liquid buffer tank, and the outlet of the discharge centrifugal pump of the sand mixing skid is connected to the suction manifold of the fracturing pumping system through a pipeline.

[0009] According to a preferred embodiment of the present invention, the sand supply and conveying system includes an auxiliary sand tank, a lifting device, and a main sand tank. The proppant in the main sand tank can be conveyed to the auxiliary sand tank through the lifting device, and the outlet of the auxiliary sand tank is connected to the sand hopper of the spiral sand conveyor.

[0010] According to a preferred embodiment of the present invention, the liquid addition system includes multiple liquid addition tanks and multiple liquid addition pumps, wherein the suction port of the liquid addition pump is connected to the liquid addition tank 1, and the outlet is connected to the sand mixing skid or the mixing skid.

[0011] According to a preferred embodiment of the present invention, the mixing system includes two mixing skids, multiple guar gum powder tanks, and a seawater filtration chamber. The water supply port of the mixing skid is connected to the seawater filtration chamber, the discharge port of the mixing skid is connected to the base liquid buffer tank, and the guar gum powder tanks are connected to the mixing skids.

[0012] According to a preferred embodiment of the present invention, the seawater filtration system includes multiple seawater filters, a freshwater pump, a seawater pump, and a freshwater tank. The inlet of the seawater pump is connected to a seawater valve box at the bottom of the hull, and the outlet is connected to the seawater filtration tank after passing through the seawater filter. The inlet of the freshwater pump is connected to the freshwater tank, and the outlet is connected to the acid mixing skid.

[0013] The present invention provides at least the following beneficial effects: It offers a multi-layered, three-dimensional marine electric-driven fracturing system layout, utilizing ship generator sets for power, fully leveraging ship cabin space, increasing the storage capacity of fracturing raw materials, and enabling large-scale continuous marine fracturing operations. Simultaneously, it incorporates backup equipment throughout the entire process, ensuring safe and continuous operation over extended periods.

[0014] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall layout of the multi-layer three-dimensional structure marine electric-driven fracturing system of the present invention.

[0016] Figure 2 This is a diagram showing the layout of the equipment on deck A of the present invention;

[0017] Figure 3 This is a layout diagram of the main deck equipment of the present invention;

[0018] Figure 4 This is a layout diagram of the platform deck equipment of the present invention;

[0019] Figure 5 This is a layout diagram of the double-layer bottom and top equipment of the present invention;

[0020] Figure reference numerals: 1. High-pressure manifold system, 2. Acid supply and distribution system, 3. Fracturing pumping system, 4. Sand mixing system, 5. Sand supply and delivery system, 6. Liquid addition system, 7. Mixing system, 8. Seawater filtration system, 9. Frequency converter system, 10. Transformer system, 101. High-pressure hose drum, 102. High-pressure connection manifold, 103. High-pressure manifold skid, 201. Acid mixing skid, 202. Acid tank, 301. Fracturing skid, 40 1. Sand mixing skid; 402. Spiral sand conveyor; 403. Base liquid buffer tank; 501. Auxiliary sand tank; 502. Lifting device; 503. Main sand tank; 601. Liquid addition tank; 602. Liquid addition pump; 701. Seawater filtration tank; 702. Mixing skid; Guar gum powder tank; 801. Seawater filter; 802. Freshwater pump; 803. Seawater pump; 804. Freshwater tank; 901. Low-voltage frequency converter; 902. Medium-voltage frequency converter. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0023] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, the above terms should not be construed as limiting this invention.

[0024] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0025] like Figure 1 As shown, a preferred embodiment of the present invention provides a multi-layer three-dimensional marine electric-driven fracturing operation system. The marine electric-driven fracturing operation system includes several key components, each of which is rationally arranged on the ship according to its functional characteristics, forming a highly efficient and collaborative whole. It includes a high-pressure manifold system 1, an acid supply and distribution system 2, a fracturing pumping system 3, a sand mixing system 4, a sand supply and transportation system 5, a liquid addition system 6, a mixing system 7, a seawater filtration system 8, a frequency conversion control system 9, and a transformer system 10.

[0026] The high-pressure manifold system 1, located on the main deck near the stern, is a crucial component for high-pressure fluid transport in the entire fracturing operation system. The high-pressure manifold system 1 includes a high-pressure hose reel 101, a high-pressure connecting manifold 102, and a high-pressure manifold skid 103. The two outlets of the high-pressure manifold skid 103 are connected to the high-pressure hose reel 101 via the high-pressure connecting manifold 102. The high-pressure connecting manifold 102 is made of high-strength, high-pressure-resistant materials, capable of withstanding extremely high pressures, ensuring the safety and stability of the high-pressure fluid during transport. The high-pressure hose reel 101 allows for flexible deployment and retraction of the high-pressure hose, facilitating connection and operation in various working environments.

[0027] The acid supply and distribution system 2 is located in an open area on deck A of the ship, which facilitates maintenance and management by operators. The system includes a mixing skid 201 and an acid tank 202. The outlet of the acid tank 202 is connected to the inlet of the acid supply pump on the mixing skid 201. The outlet of the mixing skid 201 is connected to the fracturing pumping system 3 via pipeline, ensuring smooth acid delivery. The mixing skid 201 precisely controls the mixing ratio and flow rate of the acid, and its outlet is connected to the fracturing pumping system 3 via specially designed pipeline, providing necessary acid support for fracturing operations.

[0028] The fracturing pumping system 3 is located forward of the high-pressure manifold system 1 on the main deck. The fracturing pumping system 3 includes multiple fracturing skids 301, each equipped with a high-performance pump unit and an advanced control system, capable of pressurizing the mixed fracturing fluid to extremely high pressures. The outlet of the fracturing skid 301 is connected to the inlet of the high-pressure manifold skid 103. The pressurized fracturing fluid is transported through the high-pressure manifold system 1 to the platform wellhead device and finally injected downhole.

[0029] The sand mixing system 4 is located in front of the fracturing pumping system 3 on the main deck. The sand mixing system 4 includes two sand mixing skids 401, one auger sand conveyor 402, and multiple base fluid buffer tanks 403. The outlet of the auger sand conveyor 402 is connected to the two sand mixing skids 401 respectively via a switching device. Operators can flexibly switch the conveying direction of the auger sand conveyor 402 according to actual operational needs, ensuring that the proppant is accurately delivered to the corresponding sand mixing skid 401. The inlet of the centrifugal pump of the sand mixing skid 401 is connected to the base fluid buffer tank, enabling it to draw guar gum base fluid from the base fluid buffer tank into the mixing tank. The outlet of the centrifugal pump of the sand mixing skid 401 is connected to the suction manifold of the fracturing pumping system 3 via a pipeline, delivering the mixed fracturing fluid to the fracturing pumping system 3.

[0030] The sand supply and conveying system 5 is located in front of the sand mixing system 4 and extends from the double-layer bottom to the B deck. The sand supply and conveying system 5 includes an auxiliary sand tank 501, a lifting device 502, and a main sand tank 503. The main sand tank 503 has a large storage capacity and can store a large amount of proppant. The proppant in the main sand tank 503 can be smoothly conveyed to the auxiliary sand tank 501 through the lifting device 502. The outlet of the auxiliary sand tank 501 is connected to the sand hopper of the screw conveyor 402, providing a stable source of proppant for the screw conveyor 402.

[0031] The liquid addition system 6 and the mixing system 7 are located on the platform deck. The liquid addition system 6 includes multiple liquid addition tanks 601 and multiple liquid addition pumps 602. The suction port of the liquid addition pump 602 is connected to the liquid addition tank 601, which can accurately deliver the liquid additive in the liquid addition tank 601 to the sand mixing skid 401 or the mixing skid 702.

[0032] The mixing system 7 includes two mixing skids, multiple guar gum powder tanks 703, and a seawater filtration chamber 701. The water supply port of the mixing skid 702 is connected to the seawater filtration chamber 701, enabling it to obtain filtered seawater. The mixing skid 702 is also connected to the guar gum powder tanks 703, enabling it to precisely mix the seawater in the seawater filtration chamber 701 with the guar gum powder in the guar gum powder tanks 703 to form a guar gum base solution, which is then transported to the base solution buffer tank 403.

[0033] The seawater filtration system 8 includes multiple seawater filters 801, freshwater pumps 802, seawater pumps 803, and a freshwater tank 804. The inlet of the seawater pump 803 is connected to the seawater valve box at the bottom of the ship's hold, and the outlet is connected to the seawater filtration tank 701 after passing through the seawater filter 801. The inlet of the freshwater pump 802 is connected to the freshwater tank 804, and the outlet is connected to the acid mixing skid 201.

[0034] The frequency conversion control system 9 is located at the front of the sand supply system 5 on the main deck. It can precisely control the operating frequency of each electrical device, achieving energy-efficient operation. The transformer system 10 is located at the front of the sand supply system 5 on the platform deck. It is responsible for converting the voltage output from the ship's generator set into the voltage required by each device, providing power assurance for the stable operation of the entire system.

[0035] During fracturing operations, seawater pump 803 first draws seawater from the seawater valve box at the bottom of the hull. After being precisely filtered by multiple seawater filters 801, it is delivered to the filtered seawater tank 701. The seawater in the filtered seawater tank 701 then enters the mixing skid 702, where it is fully mixed with guar gum powder in the guar gum powder tank 703 under precise control to form a guar gum base fluid, which is then transported to the base fluid buffer tank 403 for storage. The sand mixing skid 401 uses a suction pump to deliver the guar gum base fluid from the base fluid buffer tank 403 to the mixing tank. At the same time, the spiral sand conveyor 402 delivers proppant from the auxiliary sand tank 501 to the mixing tank. The guar gum base fluid and proppant are fully mixed in the mixing tank to form fracturing fluid. The mixed fracturing fluid is then delivered to the fracturing skid 301 via a discharge pump on the sand mixing skid 401. The fracturing skid 301 pressurizes the fracturing fluid to a high pressure state suitable for injection downhole. The pressurized fracturing fluid is transported to the platform wellhead equipment through the high-pressure manifold system 1 and finally injected downhole. Throughout the mixing process, the liquid additive pump 602 accurately delivers the liquid additive in the liquid additive tank 601 to the mixing skid 702 and the sand mixing skid 401 according to the preset ratio and flow rate to meet different fracturing operation requirements.

[0036] The multi-layered, three-dimensional marine electric-driven fracturing system of this invention possesses significant technical advantages. It fully utilizes the ship's generator set for power, avoiding the installation of additional power equipment and simplifying the system structure. Simultaneously, through rational planning of the layout of each system, it fully utilizes the ship's cabin space, greatly increasing the storage capacity of fracturing raw materials, providing a solid material foundation for large-scale continuous marine fracturing operations. Furthermore, it is equipped with backup equipment throughout the entire process; when one piece of equipment fails, the backup equipment can be quickly put into operation, ensuring the continuity of operations and providing a reliable guarantee for long-term continuous and safe construction. This innovative fracturing system will play a vital role in the field of offshore oil and gas exploration, driving the industry's development and progress.

[0037] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A multi-layered, three-dimensional marine electric-driven fracturing system, characterized in that, The system includes a high-pressure manifold system, an acid supply and distribution system, a fracturing pumping system, a sand mixing system, a sand supply and delivery system, a liquid addition system, a mixing system, a seawater filtration system, a frequency converter control system, and a transformer system. The high-pressure manifold system is located on the main deck near the stern. The acid supply and distribution system is located in the open area of ​​the A deck. The fracturing pumping system is located in front of the high-pressure manifold system on the main deck. The sand mixing system is located in front of the fracturing pumping system on the main deck. The sand supply and delivery system is located in front of the sand mixing system and extends from the double bottom to the B deck. The liquid addition system and the mixing system are located on the platform deck. The frequency converter control system is located in front of the sand supply and delivery system on the main deck. The transformer system is located in front of the sand supply and delivery system on the platform deck. The high-pressure manifold system includes a high-pressure hose roller, a high-pressure connecting manifold, and a high-pressure manifold skid. The two outlets of the high-pressure manifold skid are respectively connected to the high-pressure hose roller through the high-pressure connecting manifold. The acid supply and distribution system includes a mixed acid skid and an acid tank. The outlet of the acid tank is connected to the inlet of the acid supply pump of the mixed acid skid, and the outlet of the mixed acid skid is connected to the fracturing pumping system through a pipeline. The fracturing pumping system includes multiple fracturing skids, with the outlet of the fracturing skid connected to the inlet of the high-pressure manifold skid; The sand mixing system includes two sand mixing skids, one spiral sand conveyor, and multiple base liquid buffer tanks. The outlet of the spiral sand conveyor is connected to the two sand mixing skids respectively through a switching device. The inlet of the centrifugal pump of the sand mixing skid is connected to the base liquid buffer tank, and the outlet of the centrifugal pump of the sand mixing skid is connected to the suction manifold of the fracturing pumping system through a pipeline. The sand supply and conveying system includes an auxiliary sand tank, a lifting device, and a main sand tank. The proppant in the main sand tank can be conveyed to the auxiliary sand tank through the lifting device. The outlet of the auxiliary sand tank is connected to the sand hopper of the screw conveyor. The liquid addition system includes multiple liquid addition tanks and multiple liquid addition pumps. The suction port of the liquid addition pump is connected to the liquid addition tank, and the outlet is connected to the sand mixing skid or the mixing skid. The mixing system includes two mixing skids, multiple guar gum powder tanks, and a seawater filtration chamber. The water supply port of the mixing skid is connected to the seawater filtration chamber, the discharge port of the mixing skid is connected to the base liquid buffer tank, and the guar gum powder tanks are connected to the mixing skids. The seawater filtration system includes multiple seawater filters, freshwater pumps, seawater pumps, and a freshwater tank. The inlet of the seawater pump is connected to the seawater valve box at the bottom of the hull, and the outlet is connected to the seawater filtration tank after passing through the seawater filter. The inlet of the freshwater pump is connected to the freshwater tank, and the outlet is connected to the acid mixing skid.

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