Deepwater oil-gas field development method based on drilling-production-storage-unloading integrated floating platform

Abstract

The invention relates to a deepwater oil-gas field development method based on a drilling-production-storage-unloading integrated floating platform, which comprises the following steps of: arranging a drilling module on a drilling deck of a floating production treatment platform for drilling and well completion; a dry type Christmas tree is installed on a floating type production processing platform, and the dry type Christmas tree is connected with an underground oil reservoir through a production vertical pipe for oil extraction; oil gas and water are treated through the oil gas production treatment module, and qualified oil gas is stored on a platform oil tank; qualified crude oil is conveyed to the shuttling oil tanker through the outward conveying device and the outward conveying hose and is outwards conveyed through the shuttling oil tanker. The device integrates multiple functions of drilling and completion, dry-type oil extraction, storage and output, and is suitable for efficient and economic development of deepwater oil fields in the South China Sea.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploitation, and in particular to a deepwater oil and gas field development method based on a drilling-extraction-storage-unloading integrated floating platform. Background Art

[0002] The environmental conditions in my country's South China Sea are harsh, the reserves of individual oil fields are small, and the cumulative production of a single well is generally less than 500,000 cubic meters. For isolated oil and gas fields in the water depth range of 400 to 2,000 meters, floating production facilities are generally used in conjunction with underwater wet wellheads for development. This method has the problems of high development investment, poor scalability, low recovery rate, and poor development economy. It also requires the use of semi-submersible drilling platforms for drilling and completion operations. There is currently a lack of models and equipment that can enable economical and efficient development.

[0003] Therefore, there is an urgent need for a new development model that integrates drilling and completion, dry oil trees, production processing and external transmission functions to economically and efficiently develop isolated deepwater oil fields and lower the threshold for the development of deepwater oil and gas fields in the South my country Sea. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a deepwater oil and gas field development method based on a drilling-production-storage-unloading integrated floating platform, which integrates drilling and completion, dry oil production, storage and external transmission, and is suitable for the efficient and economic development of deepwater oil fields in the South my country Sea.

[0005] To achieve the above object, the present invention adopts the following technical solutions: The deepwater oil and gas field development method based on the drilling-production-storage-unloading integrated floating platform of the present invention comprises the following steps: Arrange drilling modules on the drilling deck of the floating production and processing platform for drilling and completion; Installing a dry Christmas tree on a floating production and processing platform, wherein the dry Christmas tree is connected to an underground oil reservoir through a production riser to produce oil; The oil, gas and water are processed through the oil and gas production processing module, and the qualified oil and gas are stored in the platform oil tank; Qualified crude oil is transported to the shuttle tanker through the external transfer device and the external transfer hose, and then transported outward by the shuttle tanker.

[0006] In the deepwater oil and gas field development method based on the integrated drilling-production-storage-unloading floating platform, preferably, the drilling module includes a drilling rig system and a drilling riser system.

[0007] In the deepwater oil and gas field development method based on the integrated drilling-production-storage-unloading floating platform, preferably, the floating production and processing platform is fixed on the sea by a multi-point mooring system.

[0008] The described deepwater oil and gas field development method based on an integrated drilling-production-storage-unloading floating platform. Preferably, the dry Christmas tree is located at the central position of the floating production and processing platform.

[0009] The described deepwater oil and gas field development method based on an integrated drilling-production-storage-unloading floating platform. Preferably, multiple decks are provided on the floating production and processing platform, and the multiple decks include a first process deck and a second process deck; the dry Christmas tree is installed between the first process deck and the second process deck.

[0010] Due to the adoption of the above technical solutions, the present invention has the following advantages: (1) The deepwater oil and gas field development method based on an integrated drilling-production-storage-unloading floating platform provided by the present invention can significantly reduce the development cost of deepwater isolated oil and gas fields, improve the development efficiency of oil and gas fields, and revitalize oil and gas resources that cannot be economically developed at a water depth of 400 meters to 2000 meters on the premise of ensuring technical feasibility, facilitating later production and adjustment operations, and enhancing the recovery rate. (2) The deepwater oil and gas field development method based on an integrated drilling-production-storage-unloading floating platform provided by the present invention combines a deepwater floating production platform and a dry wellhead, which can effectively reduce the investment in oil and gas field development under the same water depth conditions, and can achieve the economic and efficient development of oil and gas resources on the premise of relatively low development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Throughout the drawings, the same reference numerals are used to denote the same components. In the drawings: Figure 1 is a schematic diagram of a deepwater oil and gas field development system based on an integrated drilling-production-storage-unloading floating platform of the present invention; Figure 2 is a top view of the floating production and processing platform of the present invention.

[0012] The reference numerals in the drawings are as follows: 1 - Drilling module; 2 - Dry Christmas tree; 3 - Production riser; 4 - Oil and gas production and processing module; 5 - Platform oil tank; 6 - Export device; 7 - Export hose; 8 - Shuttle tanker; 9 - Floating production and processing platform; 10 - Drilling deck; 11 - First process deck; 12 - Second process deck; 13 - Subsurface reservoir. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.

[0014] The present invention provides a method for developing deepwater oil and gas fields based on an integrated floating platform for drilling, production, storage, and unloading. By integrating functions such as drilling and completion, dry oil production, storage, and external transportation, it is suitable for the efficient and economic development of deepwater oil fields in the South China Sea. By combining a deepwater floating production platform with a dry wellhead, it can effectively reduce the investment in oil and gas field development under the same water depth conditions and achieve the economic and efficient development of oil and gas resources on the premise of relatively low development costs.

[0015] As Figure 1 and Figure 2 shown, the method for developing deepwater oil and gas fields based on an integrated floating platform for drilling, production, storage, and unloading provided by the present invention includes the following steps: S1. Arrange a drilling module 1 on the drilling deck 10 of the floating production and processing platform 9 for drilling and completion; S2. Install a dry Christmas tree 2 on the floating production and processing platform 9. The dry Christmas tree 2 is connected to the underground oil reservoir 13 through a production riser 3 for oil production; S3. Treat oil, gas, and water through an oil and gas production and processing module 4, and store the qualified oil and gas in the platform oil tank 5; S4. Transport the qualified crude oil to a shuttle tanker 8 through an external transportation device 6 and an external transportation hose 7, and transport it outward through the shuttle tanker 8.

[0016] In the above embodiment, preferably, the drilling module includes a drilling rig system and a drilling riser system.

[0017] In the above embodiment, preferably, the floating production and processing platform is fixed at sea through a multi-point mooring system.

[0018] In the above embodiment, preferably, the dry Christmas tree 2 is located at the center of the floating production and processing platform 9.

[0019] In the above embodiment, preferably, multiple decks are provided on the floating production and processing platform 9. The multiple decks include a first-layer process deck 11 and a second-layer process deck 12; the dry Christmas tree is installed between the first-layer process deck and the second-layer process deck. Among them, the first-layer process deck 11 and the second-layer process deck 12 are located below the drilling deck.

[0020] Among them, the floating production and processing platform 9 is a dry production and processing platform.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for developing deepwater oil and gas fields based on a drilling-production-storage-unloading integrated floating platform, characterized in that: The steps include: Arrange drilling modules on the drilling deck of the floating production and processing platform for drilling and completion; Installing a dry Christmas tree on a floating production and processing platform, wherein the dry Christmas tree is connected to an underground oil reservoir through a production riser to produce oil; The oil, gas and water are processed through the oil and gas production processing module, and the qualified oil and gas are stored in the platform oil tank; Qualified crude oil is transported to the shuttle tanker through the external transfer device and the external transfer hose, and then transported outward by the shuttle tanker.

2. The deepwater oil and gas field development method based on the drilling-production-storage-unloading integrated floating platform according to claim 1 is characterized in that: The drilling module includes a drilling rig system and a drilling riser system.

3. The deepwater oil and gas field development method based on the drilling-production-storage-unloading integrated floating platform according to claim 1 is characterized in that: The floating production and processing platform is fixed on the sea through a multi-point mooring system.

4. The deepwater oil and gas field development method based on the drilling-production-storage-unloading integrated floating platform according to claim 1 is characterized in that: The dry type Christmas tree is located at the center of the floating production and processing platform.

5. The deepwater oil and gas field development method based on the drilling-production-storage-unloading integrated floating platform according to claim 1, characterized in that: A multi-layer deck is arranged on the floating production and processing platform, and the multi-layer deck includes a first-layer process deck and a second-layer process deck; the dry oil tree is installed between the first-layer process deck and the second-layer process deck.

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